Text/status parsing fixes (#141)

* aaaaaa

* vendor minify

* update + test markdown parsing

CONTRIBUTING.md

@@ -139,7 +139,7 @@ We use [golangci-lint](https://golangci-lint.run/) for linting. To run this loca
 Then, you can run the linter with:
 
 ```bash
-golangci-lint run
+golangci-lint run --tests=false
 ```
 
 Note that this linter also runs as a job on the Github repo, so if you make a PR that doesn't pass the linter, it will be rejected. As such, it's good practice to run the linter locally before pushing or opening a PR.
@@ -155,7 +155,7 @@ go get -u github.com/golang/lint/golint
 To run the linter, use:
 
 ```bash
-golint ./...
+golint ./internal/...
 ```
 
 Then make sure to run `go fmt ./...` to update whitespace and other opinionated formatting.

README.md

@@ -143,6 +143,7 @@ The following libraries and frameworks are used by GoToSocial, with gratitude
 * [superseriousbusiness/exifremove](https://github.com/superseriousbusiness/exifremove) forked from [scottleedavis/go-exif-remove](https://github.com/scottleedavis/go-exif-remove); EXIF data removal. [MIT License](https://spdx.org/licenses/MIT.html).
 * [superseriousbusiness/oauth2](https://github.com/superseriousbusiness/oauth2) forked from [go-oauth2/oauth2](https://github.com/go-oauth2/oauth2); oauth server framework and token handling. [MIT License](https://spdx.org/licenses/MIT.html).
 * [go-swagger/go-swagger](https://github.com/go-swagger/go-swagger); Swagger OpenAPI spec generation. [Apache-2.0 License](https://spdx.org/licenses/Apache-2.0.html).
+* [tdewolff/minify](https://github.com/tdewolff/minify); HTML minification. [MIT License](https://spdx.org/licenses/MIT.html).
 * [urfave/cli](https://github.com/urfave/cli); command-line interface framework. [MIT License](https://spdx.org/licenses/MIT.html).
 * [wagslane/go-password-validator](https://github.com/wagslane/go-password-validator); password strength validation. [MIT License](https://spdx.org/licenses/MIT.html).
 

dockerbuild.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-docker build -t "superseriousbusiness/gotosocial:$(cat version)" .
+docker build -t "superseriousbusiness/gotosocial:$(git rev-parse --abbrev-ref HEAD)" .

dockerpush.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-docker push "superseriousbusiness/gotosocial:$(cat version)"
+docker push "superseriousbusiness/gotosocial:$(git rev-parse --abbrev-ref HEAD)"

go.mod

@@ -44,6 +44,7 @@ require (
 	github.com/stretchr/testify v1.7.0
 	github.com/superseriousbusiness/exifremove v0.0.0-20210330092427-6acd27eac203
 	github.com/superseriousbusiness/oauth2/v4 v4.3.0-SSB
+	github.com/tdewolff/minify/v2 v2.9.21
 	github.com/tidwall/buntdb v1.2.4 // indirect
 	github.com/urfave/cli/v2 v2.3.0
 	github.com/vmihailenco/msgpack/v5 v5.3.4 // indirect

go.sum

@@ -46,6 +46,7 @@ github.com/bradleypeabody/gorilla-sessions-memcache v0.0.0-20181103040241-659414
 github.com/buckket/go-blurhash v1.1.0 h1:X5M6r0LIvwdvKiUtiNcRL2YlmOfMzYobI3VCKCZc9Do=
 github.com/buckket/go-blurhash v1.1.0/go.mod h1:aT2iqo5W9vu9GpyoLErKfTHwgODsZp3bQfXjXJUxNb8=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927/go.mod h1:h/aW8ynjgkuj+NQRlZcDbAbM1ORAbXjXX77sX7T289U=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
@@ -92,6 +93,7 @@ github.com/dsoprea/go-utility v0.0.0-20200711062821-fab8125e9bdf/go.mod h1:95+K3
 github.com/dsoprea/go-utility v0.0.0-20200717064901-2fccff4aa15e h1:ojqYA1mU6LuRm8XzrVOvyfb000y59cbUcu6Wt8sFSAs=
 github.com/dsoprea/go-utility v0.0.0-20200717064901-2fccff4aa15e/go.mod h1:KVK+/Hul09ujXAGq+42UBgCTnXkiJZRnLYdURGjQUwo=
 github.com/dsoprea/go-utility/v2 v2.0.0-20200717064901-2fccff4aa15e/go.mod h1:uAzdkPTub5Y9yQwXe8W4m2XuP0tK4a9Q/dantD0+uaU=
+github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
@@ -266,6 +268,7 @@ github.com/leodido/go-urn v1.1.0/go.mod h1:+cyI34gQWZcE1eQU7NVgKkkzdXDQHr1dBMtdA
 github.com/leodido/go-urn v1.2.0/go.mod h1:+8+nEpDfqqsY+g338gtMEUOtuK+4dEMhiQEgxpxOKII=
 github.com/leodido/go-urn v1.2.1 h1:BqpAaACuzVSgi/VLzGZIobT2z4v53pjosyNd9Yv6n/w=
 github.com/leodido/go-urn v1.2.1/go.mod h1:zt4jvISO2HfUBqxjfIshjdMTYS56ZS/qv49ictyFfxY=
+github.com/matryer/try v0.0.0-20161228173917-9ac251b645a2/go.mod h1:0KeJpeMD6o+O4hW7qJOT7vyQPKrWmj26uf5wMc/IiIs=
 github.com/mattn/go-colorable v0.1.7/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
@@ -323,6 +326,7 @@ github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykE
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
 github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
@@ -335,6 +339,12 @@ github.com/superseriousbusiness/exifremove v0.0.0-20210330092427-6acd27eac203 h1
 github.com/superseriousbusiness/exifremove v0.0.0-20210330092427-6acd27eac203/go.mod h1:0Xw5cYMOYpgaWs+OOSx41ugycl2qvKTi9tlMMcZhFyY=
 github.com/superseriousbusiness/oauth2/v4 v4.3.0-SSB h1:dzMVC+oPTxFL5cv29egBrftlqIWPXQ6/VzkuoySwgm4=
 github.com/superseriousbusiness/oauth2/v4 v4.3.0-SSB/go.mod h1:8p0a/BEN9hhsGzE3tPaFFlIZgxAaLyLN5KY0bPg9ZBc=
+github.com/tdewolff/minify/v2 v2.9.21 h1:nO4s1PEMy7aRjlIlbr3Jgr+bJby8QYuifa2Vs2f9lh4=
+github.com/tdewolff/minify/v2 v2.9.21/go.mod h1:PoDBts2L7sCwUT28vTAlozGeD6qxjrrihtin4bR/RMM=
+github.com/tdewolff/parse/v2 v2.5.19 h1:Kjaj3KQOx/4elIxlBSglus4E2oMfdROphvbq2b+OBZ0=
+github.com/tdewolff/parse/v2 v2.5.19/go.mod h1:WzaJpRSbwq++EIQHYIRTpbYKNA3gn9it1Ik++q4zyho=
+github.com/tdewolff/test v1.0.6 h1:76mzYJQ83Op284kMT+63iCNCI7NEERsIN8dLM+RiKr4=
+github.com/tdewolff/test v1.0.6/go.mod h1:6DAvZliBAAnD7rhVgwaM7DE5/d9NMOAJ09SqYqeK4QE=
 github.com/tidwall/btree v0.0.0-20191029221954-400434d76274/go.mod h1:huei1BkDWJ3/sLXmO+bsCNELL+Bp2Kks9OLyQFkzvA8=
 github.com/tidwall/btree v0.5.0 h1:IBfCtOj4uOMQcodv3wzYVo0zPqSJObm71mE039/dlXY=
 github.com/tidwall/btree v0.5.0/go.mod h1:TzIRzen6yHbibdSfK6t8QimqbUnoxUSrZfeW7Uob0q4=

internal/api/client/status/statuscreate_test.go

@@ -165,7 +165,7 @@ func (suite *StatusCreateTestSuite) TestPostAnotherNewStatus() {
 	err = json.Unmarshal(b, statusReply)
 	assert.NoError(suite.T(), err)
 
-	assert.Equal(suite.T(), "\u003cp\u003e\u003ca href=\"http://localhost:8080/tags/test\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\"\u003e#\u003cspan\u003etest\u003c/span\u003e\u003c/a\u003e alright, should be able to post \u003ca href=\"http://localhost:8080/tags/links\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\"\u003e#\u003cspan\u003elinks\u003c/span\u003e\u003c/a\u003e with fragments in them now, let\u0026#39;s see........\u003cbr/\u003e\u003cbr/\u003e\u003ca href=\"https://docs.gotosocial.org/en/latest/user_guide/posts/#links\" rel=\"noopener nofollow noreferrer\" target=\"_blank\"\u003edocs.gotosocial.org/en/latest/user_guide/posts/#links\u003c/a\u003e\u003cbr/\u003e\u003cbr/\u003e\u003ca href=\"http://localhost:8080/tags/gotosocial\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\"\u003e#\u003cspan\u003egotosocial\u003c/span\u003e\u003c/a\u003e\u003cbr/\u003e\u003cbr/\u003e(tobi remember to pull the docker image challenge)\u003c/p\u003e", statusReply.Content)
+	assert.Equal(suite.T(), "<p><a href=\"http://localhost:8080/tags/test\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>test</span></a> alright, should be able to post <a href=\"http://localhost:8080/tags/links\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>links</span></a> with fragments in them now, let's see........<br><br><a href=\"https://docs.gotosocial.org/en/latest/user_guide/posts/#links\" rel=\"noopener nofollow noreferrer\" target=\"_blank\">docs.gotosocial.org/en/latest/user_guide/posts/#links</a><br><br><a href=\"http://localhost:8080/tags/gotosocial\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>gotosocial</span></a><br><br>(tobi remember to pull the docker image challenge)</p>", statusReply.Content)
 }
 
 func (suite *StatusCreateTestSuite) TestPostNewStatusWithEmoji() {
@@ -198,7 +198,7 @@ func (suite *StatusCreateTestSuite) TestPostNewStatusWithEmoji() {
 	assert.NoError(suite.T(), err)
 
 	assert.Equal(suite.T(), "", statusReply.SpoilerText)
-	assert.Equal(suite.T(), "<p>here is a rainbow emoji a few times! :rainbow: :rainbow: :rainbow: <br/> here&#39;s an emoji that isn&#39;t in the db: :test_emoji:</p>", statusReply.Content)
+	assert.Equal(suite.T(), "<p>here is a rainbow emoji a few times! :rainbow: :rainbow: :rainbow:<br>here's an emoji that isn't in the db: :test_emoji:</p>", statusReply.Content)
 
 	assert.Len(suite.T(), statusReply.Emojis, 1)
 	mastoEmoji := statusReply.Emojis[0]
@@ -314,7 +314,7 @@ func (suite *StatusCreateTestSuite) TestAttachNewMediaSuccess() {
 	assert.NoError(suite.T(), err)
 
 	assert.Equal(suite.T(), "", statusResponse.SpoilerText)
-	assert.Equal(suite.T(), "<p>here&#39;s an image attachment</p>", statusResponse.Content)
+	assert.Equal(suite.T(), "<p>here's an image attachment</p>", statusResponse.Content)
 	assert.False(suite.T(), statusResponse.Sensitive)
 	assert.Equal(suite.T(), model.VisibilityPublic, statusResponse.Visibility)
 

internal/processing/status/util_test.go

@@ -17,8 +17,8 @@
 #Hashtag
 
 Text`
-const statusText1ExpectedFull = `<p>Another test <span class="h-card"><a href="http://fossbros-anonymous.io/@foss_satan" class="u-url mention" rel="nofollow noreferrer noopener" target="_blank">@<span>foss_satan</span></a></span><br/><br/><a href="http://localhost:8080/tags/Hashtag" class="mention hashtag" rel="tag nofollow noreferrer noopener" target="_blank">#<span>Hashtag</span></a><br/><br/>Text</p>`
+const statusText1ExpectedFull = "<p>Another test <span class=\"h-card\"><a href=\"http://fossbros-anonymous.io/@foss_satan\" class=\"u-url mention\" rel=\"nofollow noreferrer noopener\" target=\"_blank\">@<span>foss_satan</span></a></span><br><br><a href=\"http://localhost:8080/tags/Hashtag\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>Hashtag</span></a><br><br>Text</p>"
-const statusText1ExpectedPartial = `<p>Another test <span class="h-card"><a href="http://fossbros-anonymous.io/@foss_satan" class="u-url mention" rel="nofollow noreferrer noopener" target="_blank">@<span>foss_satan</span></a></span><br/><br/>#Hashtag<br/><br/>Text</p>`
+const statusText1ExpectedPartial = "<p>Another test <span class=\"h-card\"><a href=\"http://fossbros-anonymous.io/@foss_satan\" class=\"u-url mention\" rel=\"nofollow noreferrer noopener\" target=\"_blank\">@<span>foss_satan</span></a></span><br><br>#Hashtag<br><br>Text</p>"
 
 const statusText2 = `Another test @foss_satan@fossbros-anonymous.io
 
@@ -26,7 +26,7 @@
 
 #hashTAG`
 
-const status2TextExpectedFull = `<p>Another test <span class="h-card"><a href="http://fossbros-anonymous.io/@foss_satan" class="u-url mention" rel="nofollow noreferrer noopener" target="_blank">@<span>foss_satan</span></a></span><br/><br/><a href="http://localhost:8080/tags/Hashtag" class="mention hashtag" rel="tag nofollow noreferrer noopener" target="_blank">#<span>Hashtag</span></a><br/><br/><a href="http://localhost:8080/tags/Hashtag" class="mention hashtag" rel="tag nofollow noreferrer noopener" target="_blank">#<span>hashTAG</span></a></p>`
+const status2TextExpectedFull = "<p>Another test <span class=\"h-card\"><a href=\"http://fossbros-anonymous.io/@foss_satan\" class=\"u-url mention\" rel=\"nofollow noreferrer noopener\" target=\"_blank\">@<span>foss_satan</span></a></span><br><br><a href=\"http://localhost:8080/tags/Hashtag\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>Hashtag</span></a><br><br><a href=\"http://localhost:8080/tags/Hashtag\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>hashTAG</span></a></p>"
 
 type UtilTestSuite struct {
 	StatusStandardTestSuite

internal/text/common.go

@@ -20,6 +20,7 @@
 
 import (
 	"fmt"
+	"html"
 	"strings"
 
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
@@ -29,23 +30,33 @@
 // preformat contains some common logic for making a string ready for formatting, which should be used for all user-input text.
 func preformat(in string) string {
 	// do some preformatting of the text
-	// 1. Trim all the whitespace
+
-	s := strings.TrimSpace(in)
+	// 1. unescape everything that might be html escaped
+	s := html.UnescapeString(in)
+
+	// 2. trim leading or trailing whitespace
+	s = strings.TrimSpace(s)
 	return s
 }
 
 // postformat contains some common logic for html sanitization of text, wrapping elements, and trimming newlines and whitespace
 func postformat(in string) string {
 	// do some postformatting of the text
-	// 1. sanitize html to remove any dodgy scripts or other disallowed elements
+
-	s := SanitizeOutgoing(in)
+	// 1. sanitize html to remove potentially dangerous elements
-	// 2. wrap the whole thing in a paragraph
+	s := SanitizeHTML(in)
-	s = fmt.Sprintf(`<p>%s</p>`, s)
+
-	// 3. remove any cheeky newlines
+	// 2. the sanitize step tends to escape characters inside codeblocks, which is behavior we don't want, so unescape everything again
-	s = strings.ReplaceAll(s, "\n", "")
+	s = html.UnescapeString(s)
-	// 4. remove any whitespace added as a result of the formatting
+
-	s = strings.TrimSpace(s)
+	// 3. minify html to remove any trailing newlines, spaces, unnecessary elements, etc etc
+	mini, err := minifyHTML(s)
+	if err != nil {
+		// if the minify failed, just return what we have
 		return s
+	}
+	// return minified version of the html
+	return mini
 }
 
 func (f *formatter) ReplaceTags(in string, tags []*gtsmodel.Tag) string {

internal/text/markdown.go

@@ -23,21 +23,14 @@
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 )
 
-var bfExtensions = blackfriday.NoIntraEmphasis |
-	blackfriday.FencedCode |
-	blackfriday.Autolink |
-	blackfriday.Strikethrough |
-	blackfriday.SpaceHeadings |
-	blackfriday.BackslashLineBreak
-
 func (f *formatter) FromMarkdown(md string, mentions []*gtsmodel.Mention, tags []*gtsmodel.Tag) string {
 	content := preformat(md)
 
 	// do the markdown parsing *first*
-	content = string(blackfriday.Run([]byte(content), blackfriday.WithExtensions(bfExtensions)))
+	contentBytes := blackfriday.Run([]byte(content))
 
 	// format tags nicely
-	content = f.ReplaceTags(content, tags)
+	content = f.ReplaceTags(string(contentBytes), tags)
 
 	// format mentions nicely
 	content = f.ReplaceMentions(content, mentions)

internal/text/markdown_test.go

@@ -0,0 +1,116 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package text_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/text"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+const (
+	simpleMarkdown = `# Title
+
+Here's a simple text in markdown.
+
+Here's a [link](https://example.org).`
+
+	simpleMarkdownExpected = "<h1>Title</h1><p>Here’s a simple text in markdown.</p><p>Here’s a <a href=\"https://example.org\" rel=\"nofollow noreferrer noopener\" target=\"_blank\">link</a>.</p>"
+
+	withCodeBlockExpected = "<h1>Title</h1><p>Below is some JSON.</p><pre><code class=\"language-json\">{\n  \"key\": \"value\",\n  \"another_key\": [\n    \"value1\",\n    \"value2\"\n  ]\n}\n</code></pre><p>that was some JSON :)</p>"
+
+	withHashtag         = "# Title\n\nhere's a simple status that uses hashtag #Hashtag!"
+	withHashtagExpected = "<h1>Title</h1><p>here’s a simple status that uses hashtag <a href=\"http://localhost:8080/tags/Hashtag\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>Hashtag</span></a>!</p>"
+)
+
+var (
+	withCodeBlock = `# Title
+
+Below is some JSON.
+
+` + "```" + `json
+{
+  "key": "value",
+  "another_key": [
+    "value1",
+    "value2"
+  ]
+}
+` + "```" + `
+
+that was some JSON :)
+`
+)
+
+type MarkdownTestSuite struct {
+	TextStandardTestSuite
+}
+
+func (suite *MarkdownTestSuite) SetupSuite() {
+	suite.testTokens = testrig.NewTestTokens()
+	suite.testClients = testrig.NewTestClients()
+	suite.testApplications = testrig.NewTestApplications()
+	suite.testUsers = testrig.NewTestUsers()
+	suite.testAccounts = testrig.NewTestAccounts()
+	suite.testAttachments = testrig.NewTestAttachments()
+	suite.testStatuses = testrig.NewTestStatuses()
+	suite.testTags = testrig.NewTestTags()
+	suite.testMentions = testrig.NewTestMentions()
+}
+
+func (suite *MarkdownTestSuite) SetupTest() {
+	suite.config = testrig.NewTestConfig()
+	suite.db = testrig.NewTestDB()
+	suite.log = testrig.NewTestLog()
+	suite.formatter = text.NewFormatter(suite.config, suite.db, suite.log)
+
+	testrig.StandardDBSetup(suite.db, suite.testAccounts)
+}
+
+func (suite *MarkdownTestSuite) TearDownTest() {
+	testrig.StandardDBTeardown(suite.db)
+}
+
+func (suite *MarkdownTestSuite) TestParseSimple() {
+	s := suite.formatter.FromMarkdown(simpleMarkdown, nil, nil)
+	suite.Equal(simpleMarkdownExpected, s)
+}
+
+func (suite *MarkdownTestSuite) TestParseWithCodeBlock() {
+	fmt.Println(withCodeBlock)
+	s := suite.formatter.FromMarkdown(withCodeBlock, nil, nil)
+	suite.Equal(withCodeBlockExpected, s)
+}
+
+func (suite *MarkdownTestSuite) TestParseWithHashtag() {
+	foundTags := []*gtsmodel.Tag{
+		suite.testTags["Hashtag"],
+	}
+
+	s := suite.formatter.FromMarkdown(withHashtag, nil, foundTags)
+	suite.Equal(withHashtagExpected, s)
+}
+
+func TestMarkdownTestSuite(t *testing.T) {
+	suite.Run(t, new(MarkdownTestSuite))
+}

internal/text/minify.go

@@ -0,0 +1,39 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package text
+
+import (
+	"github.com/tdewolff/minify/v2"
+	"github.com/tdewolff/minify/v2/html"
+)
+
+var m *minify.M
+
+// minifyHTML runs html through a minifier, reducing it in size.
+func minifyHTML(in string) (string, error) {
+	if m == nil {
+		m = minify.New()
+		m.Add("text/html", &html.Minifier{
+			KeepQuotes:       true,
+			KeepEndTags:      true,
+			KeepDocumentTags: true,
+		})
+	}
+	return m.String("text/html", in)
+}

internal/text/plain.go

@@ -19,6 +19,7 @@
 package text
 
 import (
+	"fmt"
 	"strings"
 
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
@@ -27,6 +28,9 @@
 func (f *formatter) FromPlain(plain string, mentions []*gtsmodel.Mention, tags []*gtsmodel.Tag) string {
 	content := preformat(plain)
 
+	// sanitize any html elements
+	content = RemoveHTML(content)
+
 	// format links nicely
 	content = f.ReplaceLinks(content)
 
@@ -39,5 +43,8 @@ func (f *formatter) FromPlain(plain string, mentions []*gtsmodel.Mention, tags [
 	// replace newlines with breaks
 	content = strings.ReplaceAll(content, "\n", "<br />")
 
+	// wrap the whole thing in a pee
+	content = fmt.Sprintf(`<p>%s</p>`, content)
+
 	return postformat(content)
 }

internal/text/plain_test.go

@@ -33,15 +33,15 @@
 	simple         = "this is a plain and simple status"
 	simpleExpected = "<p>this is a plain and simple status</p>"
 
-	withTag         = "this is a simple status that uses hashtag #welcome!"
+	withTag         = "here's a simple status that uses hashtag #welcome!"
-	withTagExpected = "<p>this is a simple status that uses hashtag <a href=\"http://localhost:8080/tags/welcome\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>welcome</span></a>!</p>"
+	withTagExpected = "<p>here's a simple status that uses hashtag <a href=\"http://localhost:8080/tags/welcome\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>welcome</span></a>!</p>"
 
 	moreComplex = `Another test @foss_satan@fossbros-anonymous.io
 
 #Hashtag
 
 Text`
-	moreComplexExpected = `<p>Another test <span class="h-card"><a href="http://fossbros-anonymous.io/@foss_satan" class="u-url mention" rel="nofollow noreferrer noopener" target="_blank">@<span>foss_satan</span></a></span><br/><br/><a href="http://localhost:8080/tags/Hashtag" class="mention hashtag" rel="tag nofollow noreferrer noopener" target="_blank">#<span>Hashtag</span></a><br/><br/>Text</p>`
+	moreComplexFull = "<p>Another test <span class=\"h-card\"><a href=\"http://fossbros-anonymous.io/@foss_satan\" class=\"u-url mention\" rel=\"nofollow noreferrer noopener\" target=\"_blank\">@<span>foss_satan</span></a></span><br><br><a href=\"http://localhost:8080/tags/Hashtag\" class=\"mention hashtag\" rel=\"tag nofollow noreferrer noopener\" target=\"_blank\">#<span>Hashtag</span></a><br><br>Text</p>"
 )
 
 type PlainTestSuite struct {
@@ -102,7 +102,7 @@ func (suite *PlainTestSuite) TestParseMoreComplex() {
 
 	fmt.Println(f)
 
-	assert.Equal(suite.T(), moreComplexExpected, f)
+	assert.Equal(suite.T(), moreComplexFull, f)
 }
 
 func TestPlainTestSuite(t *testing.T) {

internal/text/sanitize.go

@@ -19,6 +19,8 @@
 package text
 
 import (
+	"regexp"
+
 	"github.com/microcosm-cc/bluemonday"
 )
 
@@ -31,12 +33,11 @@
 	RequireNoReferrerOnLinks(true).
 	RequireNoFollowOnLinks(true).
 	RequireCrossOriginAnonymous(true).
-	AddTargetBlankToFullyQualifiedLinks(true)
+	AddTargetBlankToFullyQualifiedLinks(true).
-
-// outgoing policy should be used on statuses we've already parsed and added our own elements etc to. It is less strict than regular.
-var outgoing *bluemonday.Policy = regular.
 	AllowAttrs("class", "href", "rel").OnElements("a").
-	AllowAttrs("class").OnElements("span")
+	AllowAttrs("class").OnElements("span").
+	AllowAttrs("class").Matching(regexp.MustCompile("^language-[a-zA-Z0-9]+$")).OnElements("code").
+	SkipElementsContent("code", "pre")
 
 // '[C]an be thought of as equivalent to stripping all HTML elements and their attributes as it has nothing on its allowlist.
 // An example usage scenario would be blog post titles where HTML tags are not expected at all
@@ -54,9 +55,3 @@ func SanitizeHTML(in string) string {
 func RemoveHTML(in string) string {
 	return strict.Sanitize(in)
 }
-
-// SanitizeOutgoing cleans up HTML in the given string, allowing through only safe elements and elements that were added during the parsing process.
-// This should be used on text that we've already converted into HTML, just to catch any weirdness.
-func SanitizeOutgoing(in string) string {
-	return outgoing.Sanitize(in)
-}

internal/text/sanitize_test.go

@@ -0,0 +1,75 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package text_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/text"
+)
+
+const (
+	removeHTML  = `<p>Another test <span class="h-card"><a href="http://fossbros-anonymous.io/@foss_satan" class="u-url mention" rel="nofollow noreferrer noopener" target="_blank">@<span>foss_satan</span></a></span><br/><br/><a href="http://localhost:8080/tags/Hashtag" class="mention hashtag" rel="tag nofollow noreferrer noopener" target="_blank">#<span>Hashtag</span></a><br/><br/>Text</p>`
+	removedHTML = `Another test @foss_satan#HashtagText`
+
+	sanitizeHTML  = `here's some naughty html: <script>alert(ahhhh)</script> !!!`
+	sanitizedHTML = `here&#39;s some naughty html:  !!!`
+
+	withEscapedLiteral         = `it\u0026amp;#39;s its it is`
+	withEscapedLiteralExpected = `it\u0026amp;#39;s its it is`
+	withEscaped                = "it\u0026amp;#39;s its it is"
+	withEscapedExpected        = "it&amp;#39;s its it is"
+
+	sanitizeOutgoing  = `<p>gotta test some fucking &#39;&#39;&#39;&#39;&#39;&#39;&#39;&#39;&#39; marks</p>`
+	sanitizedOutgoing = `<p>gotta test some fucking &#39;&#39;&#39;&#39;&#39;&#39;&#39;&#39;&#39; marks</p>`
+)
+
+type SanitizeTestSuite struct {
+	suite.Suite
+}
+
+func (suite *SanitizeTestSuite) TestRemoveHTML() {
+	s := text.RemoveHTML(removeHTML)
+	suite.Equal(removedHTML, s)
+}
+
+func (suite *SanitizeTestSuite) TestSanitizeOutgoing() {
+	s := text.SanitizeHTML(sanitizeOutgoing)
+	suite.Equal(sanitizedOutgoing, s)
+}
+
+func (suite *SanitizeTestSuite) TestSanitizeHTML() {
+	s := text.SanitizeHTML(sanitizeHTML)
+	suite.Equal(sanitizedHTML, s)
+}
+
+func (suite *SanitizeTestSuite) TestSanitizeWithEscapedLiteral() {
+	s := text.RemoveHTML(withEscapedLiteral)
+	suite.Equal(withEscapedLiteralExpected, s)
+}
+
+func (suite *SanitizeTestSuite) TestSanitizeWithEscaped() {
+	s := text.RemoveHTML(withEscaped)
+	suite.Equal(withEscapedExpected, s)
+}
+
+func TestSanitizeTestSuite(t *testing.T) {
+	suite.Run(t, new(SanitizeTestSuite))
+}

vendor/github.com/tdewolff/minify/v2/.gitattributes

@@ -0,0 +1,2 @@
+benchmarks/sample_* linguist-generated
+tests/*/corpus/* linguist-generated

vendor/github.com/tdewolff/minify/v2/.gitignore

@@ -0,0 +1,14 @@
+dist/
+benchmarks/*
+!benchmarks/*.go
+!benchmarks/sample_*
+tests/*/fuzz-fuzz.zip
+tests/*/crashers
+tests/*/suppressions
+tests/*/corpus/*
+!tests/*/corpus/*.*
+parse/tests/*/fuzz-fuzz.zip
+parse/tests/*/crashers
+parse/tests/*/suppressions
+parse/tests/*/corpus/*
+!parse/tests/*/corpus/*.*

vendor/github.com/tdewolff/minify/v2/.golangci.yml

@@ -0,0 +1,16 @@
+linters:
+  enable:
+  - depguard
+  - dogsled
+  - gofmt
+  - goimports
+  - golint
+  - gosec
+  - govet
+  - megacheck
+  - misspell
+  - nakedret
+  - prealloc
+  - unconvert
+  - unparam
+  - wastedassign

vendor/github.com/tdewolff/minify/v2/Dockerfile

@@ -0,0 +1,14 @@
+# Use this image to build the executable
+FROM golang:1.16-alpine AS compiler
+
+WORKDIR $GOPATH/src/minify
+COPY . .
+
+RUN apk add --update --update-cache --no-cache git ca-certificates && \
+    GO111MODULES=on CGO_ENABLED=0 go build -ldflags "-s -w" -trimpath -o /bin/minify ./cmd/minify
+
+
+# Final image containing the executable from the previous step
+FROM alpine:3
+
+COPY --from=compiler /bin/minify /bin/minify

vendor/github.com/tdewolff/minify/v2/LICENSE

@@ -0,0 +1,22 @@
+Copyright (c) 2015 Taco de Wolff
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation
+ files (the "Software"), to deal in the Software without
+ restriction, including without limitation the rights to use,
+ copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the
+ Software is furnished to do so, subject to the following
+ conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/tdewolff/minify/v2/Makefile

@@ -0,0 +1,56 @@
+NAME=minify
+CMD=./cmd/minify
+TARGETS=linux_amd64 darwin_amd64 freebsd_amd64 netbsd_amd64 openbsd_amd64 windows_amd64
+VERSION=`git describe --tags`
+FLAGS=-ldflags "-s -w -X 'main.Version=${VERSION}'" -trimpath
+ENVS=GO111MODULES=on CGO_ENABLED=0
+
+all: install
+
+install:
+	echo "Installing ${VERSION}"
+	${ENVS} go install ${FLAGS} ./cmd/minify
+	. cmd/minify/bash_completion
+
+release:
+	TAG=$(shell git describe --tags --exact-match 2> /dev/null);
+	if [ "${.SHELLSTATUS}" -eq 0 ]; then \
+		echo "Releasing ${VERSION}"; \
+	else \
+		echo "WARNING: commit is not tagged with a version"; \
+		echo ""; \
+	fi
+	rm -rf dist
+	mkdir -p dist
+	for t in ${TARGETS}; do \
+		echo Building $$t...; \
+		mkdir dist/$$t; \
+		os=$$(echo $$t | cut -f1 -d_); \
+		arch=$$(echo $$t | cut -f2 -d_); \
+		${ENVS} GOOS=$$os GOARCH=$$arch go build ${FLAGS} -o dist/$$t/${NAME} ${CMD}; \
+		\
+		cp LICENSE dist/$$t/.; \
+		cp cmd/minify/README.md dist/$$t/.; \
+		if [ "$$os" == "windows" ]; then \
+			mv dist/$$t/${NAME} dist/$$t/${NAME}.exe; \
+			zip -jq dist/${NAME}_$$t.zip dist/$$t/*; \
+			cd dist; \
+			sha256sum ${NAME}_$$t.zip >> checksums.txt; \
+			cd ..; \
+		else \
+			cp cmd/minify/bash_completion dist/$$t/.; \
+			cd dist/$$t; \
+			tar -cf - * | gzip -9 > ../${NAME}_$$t.tar.gz; \
+			cd ..; \
+			sha256sum ${NAME}_$$t.tar.gz >> checksums.txt; \
+			cd ..; \
+		fi; \
+		rm -rf dist/$$t; \
+	done
+
+clean:
+	echo "Cleaning dist/"
+	rm -rf dist
+
+.PHONY: install release clean
+.SILENT: install release clean

vendor/github.com/tdewolff/minify/v2/README.md

@@ -0,0 +1,693 @@
+# Minify <a name="minify"></a> [![API reference](https://img.shields.io/badge/godoc-reference-5272B4)](https://pkg.go.dev/github.com/tdewolff/minify/v2?tab=doc) [![Go Report Card](https://goreportcard.com/badge/github.com/tdewolff/minify)](https://goreportcard.com/report/github.com/tdewolff/minify) [![codecov](https://codecov.io/gh/tdewolff/minify/branch/master/graph/badge.svg?token=Cr7r2EKPj2)](https://codecov.io/gh/tdewolff/minify) [![Donate](https://img.shields.io/badge/patreon-donate-DFB317)](https://www.patreon.com/tdewolff)
+
+**[Online demo](https://go.tacodewolff.nl/minify) if you need to minify files *now*.**
+
+**[Command line tool](https://github.com/tdewolff/minify/tree/master/cmd/minify) that minifies concurrently and watches file changes.**
+
+**[Releases](https://github.com/tdewolff/minify/releases) of CLI for various platforms.** See [CLI](https://github.com/tdewolff/minify/tree/master/cmd/minify) for more installation instructions.
+
+**[Parse](https://github.com/tdewolff/minify/tree/master/parse) subpackage on which minify depends.**
+ 
+---
+
+*Did you know that the shortest valid piece of HTML5 is `<!doctype html><title>x</title>`? See for yourself at the [W3C Validator](http://validator.w3.org/)!*
+
+Minify is a minifier package written in [Go][1]. It provides HTML5, CSS3, JS, JSON, SVG and XML minifiers and an interface to implement any other minifier. Minification is the process of removing bytes from a file (such as whitespace) without changing its output and therefore shrinking its size and speeding up transmission over the internet and possibly parsing. The implemented minifiers are designed for high performance.
+
+The core functionality associates mimetypes with minification functions, allowing embedded resources (like CSS or JS within HTML files) to be minified as well. Users can add new implementations that are triggered based on a mimetype (or pattern), or redirect to an external command (like ClosureCompiler, UglifyCSS, ...).
+
+### Sponsors
+
+[![SiteGround](https://www.siteground.com/img/downloads/siteground-logo-black-transparent-vector.svg)](https://www.siteground.com/)
+
+Please see https://www.patreon.com/tdewolff for ways to contribute, otherwise please contact me directly!
+
+#### Table of Contents
+
+- [Minify](#minify)
+	- [Prologue](#prologue)
+	- [Installation](#installation)
+	- [API stability](#api-stability)
+	- [Testing](#testing)
+	- [Performance](#performance)
+	- [HTML](#html)
+		- [Whitespace removal](#whitespace-removal)
+	- [CSS](#css)
+	- [JS](#js)
+		- [Comparison with other tools](#comparison-with-other-tools)
+            - [Compression ratio (lower is better)](#compression-ratio-lower-is-better)
+            - [Time (lower is better)](#time-lower-is-better)
+	- [JSON](#json)
+	- [SVG](#svg)
+	- [XML](#xml)
+	- [Usage](#usage)
+		- [New](#new)
+		- [From reader](#from-reader)
+		- [From bytes](#from-bytes)
+		- [From string](#from-string)
+		- [To reader](#to-reader)
+		- [To writer](#to-writer)
+		- [Middleware](#middleware)
+		- [Custom minifier](#custom-minifier)
+		- [Mediatypes](#mediatypes)
+	- [Examples](#examples)
+		- [Common minifiers](#common-minifiers)
+		- [External minifiers](#external-minifiers)
+            - [Closure Compiler](#closure-compiler)
+            - [UglifyJS](#uglifyjs)
+            - [esbuild](#esbuild)
+		- [Custom minifier](#custom-minifier-example)
+		- [ResponseWriter](#responsewriter)
+		- [Templates](#templates)
+	- [License](#license)
+
+### Roadmap
+
+- [ ] Use ASM/SSE to further speed-up core parts of the parsers/minifiers
+- [x] Improve JS minifiers by shortening variables and proper semicolon omission
+- [ ] Speed-up SVG minifier, it is very slow
+- [x] Proper parser error reporting and line number + column information
+- [ ] Generation of source maps (uncertain, might slow down parsers too much if it cannot run separately nicely)
+- [ ] Create a cmd to pack webfiles (much like webpack), ie. merging CSS and JS files, inlining small external files, minification and gzipping. This would work on HTML files.
+
+## Prologue
+Minifiers or bindings to minifiers exist in almost all programming languages. Some implementations are merely using several regular expressions to trim whitespace and comments (even though regex for parsing HTML/XML is ill-advised, for a good read see [Regular Expressions: Now You Have Two Problems](http://blog.codinghorror.com/regular-expressions-now-you-have-two-problems/)). Some implementations are much more profound, such as the [YUI Compressor](http://yui.github.io/yuicompressor/) and [Google Closure Compiler](https://github.com/google/closure-compiler) for JS. As most existing implementations either use JavaScript, use regexes, and don't focus on performance, they are pretty slow.
+
+This minifier proves to be that fast and extensive minifier that can handle HTML and any other filetype it may contain (CSS, JS, ...). It is usually orders of magnitude faster than existing minifiers.
+
+## Installation
+Make sure you have [Git](https://git-scm.com/) and [Go](https://golang.org/dl/) (1.13 or higher) installed, run
+```
+mkdir Project
+cd Project
+go mod init
+go get -u github.com/tdewolff/minify/v2
+```
+
+Then add the following imports to be able to use the various minifiers
+``` go
+import (
+	"github.com/tdewolff/minify/v2"
+	"github.com/tdewolff/minify/v2/css"
+	"github.com/tdewolff/minify/v2/html"
+	"github.com/tdewolff/minify/v2/js"
+	"github.com/tdewolff/minify/v2/json"
+	"github.com/tdewolff/minify/v2/svg"
+	"github.com/tdewolff/minify/v2/xml"
+)
+```
+
+You can optionally run `go mod tidy` to clean up the `go.mod` and `go.sum` files.
+
+See [CLI tool](https://github.com/tdewolff/minify/tree/master/cmd/minify) for installation instructions of the binary.
+
+### Docker
+
+If you want to use Docker, please see https://hub.docker.com/r/tdewolff/minify.
+
+## API stability
+There is no guarantee for absolute stability, but I take issues and bugs seriously and don't take API changes lightly. The library will be maintained in a compatible way unless vital bugs prevent me from doing so. There has been one API change after v1 which added options support and I took the opportunity to push through some more API clean up as well. There are no plans whatsoever for future API changes.
+
+## Testing
+For all subpackages and the imported `parse` package, test coverage of 100% is pursued. Besides full coverage, the minifiers are [fuzz tested](https://github.com/tdewolff/fuzz) using [github.com/dvyukov/go-fuzz](http://www.github.com/dvyukov/go-fuzz), see [the wiki](https://github.com/tdewolff/minify/wiki) for the most important bugs found by fuzz testing. These tests ensure that everything works as intended and that the code does not crash (whatever the input). If you still encounter a bug, please file a [bug report](https://github.com/tdewolff/minify/issues)!
+
+## Performance
+The benchmarks directory contains a number of standardized samples used to compare performance between changes. To give an indication of the speed of this library, I've ran the tests on my Thinkpad T460 (i5-6300U quad-core 2.4GHz running Arch Linux) using Go 1.15.
+
+```
+name                              time/op
+CSS/sample_bootstrap.css-4          2.70ms ± 0%
+CSS/sample_gumby.css-4              3.57ms ± 0%
+CSS/sample_fontawesome.css-4         767µs ± 0%
+CSS/sample_normalize.css-4          85.5µs ± 0%
+HTML/sample_amazon.html-4           15.2ms ± 0%
+HTML/sample_bbc.html-4              3.90ms ± 0%
+HTML/sample_blogpost.html-4          420µs ± 0%
+HTML/sample_es6.html-4              15.6ms ± 0%
+HTML/sample_stackoverflow.html-4    3.73ms ± 0%
+HTML/sample_wikipedia.html-4        6.60ms ± 0%
+JS/sample_ace.js-4                  28.7ms ± 0%
+JS/sample_dot.js-4                   357µs ± 0%
+JS/sample_jquery.js-4               10.0ms ± 0%
+JS/sample_jqueryui.js-4             20.4ms ± 0%
+JS/sample_moment.js-4               3.47ms ± 0%
+JSON/sample_large.json-4            3.25ms ± 0%
+JSON/sample_testsuite.json-4        1.74ms ± 0%
+JSON/sample_twitter.json-4          24.2µs ± 0%
+SVG/sample_arctic.svg-4             34.7ms ± 0%
+SVG/sample_gopher.svg-4              307µs ± 0%
+SVG/sample_usa.svg-4                57.4ms ± 0%
+SVG/sample_car.svg-4                18.0ms ± 0%
+SVG/sample_tiger.svg-4              5.61ms ± 0%
+XML/sample_books.xml-4              54.7µs ± 0%
+XML/sample_catalog.xml-4            33.0µs ± 0%
+XML/sample_omg.xml-4                7.17ms ± 0%
+
+name                              speed
+CSS/sample_bootstrap.css-4        50.7MB/s ± 0%
+CSS/sample_gumby.css-4            52.1MB/s ± 0%
+CSS/sample_fontawesome.css-4      61.2MB/s ± 0%
+CSS/sample_normalize.css-4        70.8MB/s ± 0%
+HTML/sample_amazon.html-4         31.1MB/s ± 0%
+HTML/sample_bbc.html-4            29.5MB/s ± 0%
+HTML/sample_blogpost.html-4       49.8MB/s ± 0%
+HTML/sample_es6.html-4            65.6MB/s ± 0%
+HTML/sample_stackoverflow.html-4  55.0MB/s ± 0%
+HTML/sample_wikipedia.html-4      67.5MB/s ± 0%
+JS/sample_ace.js-4                22.4MB/s ± 0%
+JS/sample_dot.js-4                14.5MB/s ± 0%
+JS/sample_jquery.js-4             24.8MB/s ± 0%
+JS/sample_jqueryui.js-4           23.0MB/s ± 0%
+JS/sample_moment.js-4             28.6MB/s ± 0%
+JSON/sample_large.json-4           234MB/s ± 0%
+JSON/sample_testsuite.json-4       394MB/s ± 0%
+JSON/sample_twitter.json-4        63.0MB/s ± 0%
+SVG/sample_arctic.svg-4           42.4MB/s ± 0%
+SVG/sample_gopher.svg-4           19.0MB/s ± 0%
+SVG/sample_usa.svg-4              17.8MB/s ± 0%
+SVG/sample_car.svg-4              29.3MB/s ± 0%
+SVG/sample_tiger.svg-4            12.2MB/s ± 0%
+XML/sample_books.xml-4            81.0MB/s ± 0%
+XML/sample_catalog.xml-4          58.6MB/s ± 0%
+XML/sample_omg.xml-4               159MB/s ± 0%
+```
+
+## HTML
+
+HTML (with JS and CSS) minification typically shaves off about 10%.
+
+The HTML5 minifier uses these minifications:
+
+- strip unnecessary whitespace and otherwise collapse it to one space (or newline if it originally contained a newline)
+- strip superfluous quotes, or uses single/double quotes whichever requires fewer escapes
+- strip default attribute values and attribute boolean values
+- strip some empty attributes
+- strip unrequired tags (`html`, `head`, `body`, ...)
+- strip unrequired end tags (`tr`, `td`, `li`, ... and often `p`)
+- strip default protocols (`http:`, `https:` and `javascript:`)
+- strip all comments (including conditional comments, old IE versions are not supported anymore by Microsoft)
+- shorten `doctype` and `meta` charset
+- lowercase tags, attributes and some values to enhance gzip compression
+
+Options:
+
+- `KeepConditionalComments` preserve all IE conditional comments such as `<!--[if IE 6]><![endif]-->` and `<![if IE 6]><![endif]>`, see https://msdn.microsoft.com/en-us/library/ms537512(v=vs.85).aspx#syntax
+- `KeepDefaultAttrVals` preserve default attribute values such as `<script type="application/javascript">`
+- `KeepDocumentTags` preserve `html`, `head` and `body` tags
+- `KeepEndTags` preserve all end tags
+- `KeepQuotes` preserve quotes around attribute values
+- `KeepWhitespace` preserve whitespace between inline tags but still collapse multiple whitespace characters into one
+
+After recent benchmarking and profiling it became really fast and minifies pages in the 10ms range, making it viable for on-the-fly minification.
+
+However, be careful when doing on-the-fly minification. Minification typically trims off 10% and does this at worst around about 20MB/s. This means users have to download slower than 2MB/s to make on-the-fly minification worthwhile. This may or may not apply in your situation. Rather use caching!
+
+### Whitespace removal
+The whitespace removal mechanism collapses all sequences of whitespace (spaces, newlines, tabs) to a single space. If the sequence contained a newline or carriage return it will collapse into a newline character instead. It trims all text parts (in between tags) depending on whether it was preceded by a space from a previous piece of text and whether it is followed up by a block element or an inline element. In the former case we can omit spaces while for inline elements whitespace has significance.
+
+Make sure your HTML doesn't depend on whitespace between `block` elements that have been changed to `inline` or `inline-block` elements using CSS. Your layout *should not* depend on those whitespaces as the minifier will remove them. An example is a menu consisting of multiple `<li>` that have `display:inline-block` applied and have whitespace in between them. It is bad practise to rely on whitespace for element positioning anyways!
+
+## CSS
+
+Minification typically shaves off about 10%-15%. This CSS minifier will _not_ do structural changes to your stylesheets. Although this could result in smaller files, the complexity is quite high and the risk of breaking website is high too.
+
+The CSS minifier will only use safe minifications:
+
+- remove comments and unnecessary whitespace (but keep `/*! ... */` which usually contains the license)
+- remove trailing semicolons
+- optimize `margin`, `padding` and `border-width` number of sides
+- shorten numbers by removing unnecessary `+` and zeros and rewriting with/without exponent
+- remove dimension and percentage for zero values
+- remove quotes for URLs
+- remove quotes for font families and make lowercase
+- rewrite hex colors to/from color names, or to three digit hex
+- rewrite `rgb(`, `rgba(`, `hsl(` and `hsla(` colors to hex or name
+- use four digit hex for alpha values (`transparent` &#8594; `#0000`)
+- replace `normal` and `bold` by numbers for `font-weight` and `font`
+- replace `none` &#8594; `0` for `border`, `background` and `outline`
+- lowercase all identifiers except classes, IDs and URLs to enhance gzip compression
+- shorten MS alpha function
+- rewrite data URIs with base64 or ASCII whichever is shorter
+- calls minifier for data URI mediatypes, thus you can compress embedded SVG files if you have that minifier attached
+- shorten aggregate declarations such as `background` and `font`
+
+It does purposely not use the following techniques:
+
+- (partially) merge rulesets
+- (partially) split rulesets
+- collapse multiple declarations when main declaration is defined within a ruleset (don't put `font-weight` within an already existing `font`, too complex)
+- remove overwritten properties in ruleset (this not always overwrites it, for example with `!important`)
+- rewrite properties into one ruleset if possible (like `margin-top`, `margin-right`, `margin-bottom` and `margin-left` &#8594; `margin`)
+- put nested ID selector at the front (`body > div#elem p` &#8594; `#elem p`)
+- rewrite attribute selectors for IDs and classes (`div[id=a]` &#8594; `div#a`)
+- put space after pseudo-selectors (IE6 is old, move on!)
+
+There are a couple of comparison tables online, such as [CSS Minifier Comparison](http://www.codenothing.com/benchmarks/css-compressor-3.0/full.html), [CSS minifiers comparison](http://www.phpied.com/css-minifiers-comparison/) and [CleanCSS tests](http://goalsmashers.github.io/css-minification-benchmark/). Comparing speed between each, this minifier will usually be between 10x-300x faster than existing implementations, and even rank among the top for minification ratios. It falls short with the purposely not implemented and often unsafe techniques.
+
+Options:
+
+- `KeepCSS2` prohibits using CSS3 syntax (such as exponents in numbers, or `rgba(` &#8594; `rgb(`), might be incomplete
+- `Precision` number of significant digits to preserve for numbers, `0` means no trimming
+
+## JS
+
+The JS minifier typically shaves off about 35% -- 65% of filesize depening on the file, which is a compression close to many other minifiers. Common speeds of PHP and JS implementations are about 100-300kB/s (see [Uglify2](http://lisperator.net/uglifyjs/), [Adventures in PHP web asset minimization](https://www.happyassassin.net/2014/12/29/adventures-in-php-web-asset-minimization/)). This implementation is orders of magnitude faster at around ~25MB/s.
+
+The following features are implemented:
+
+- remove superfluous whitespace
+- remove superfluous semicolons
+- shorten `true`, `false`, and `undefined` to `!0`, `!1` and `void 0`
+- rename variables and functions to shorter names (not in global scope)
+- move `var` declarations to the top of the global/function scope (if more than one)
+- collapse if/else statements to expressions
+- minify conditional expressions to simpler ones
+- merge sequential expression statements to one, including into `return` and `throw`
+- remove superfluous grouping in expressions
+- shorten or remove string escapes
+- convert object key or index expression from string to identifier or decimal
+- merge concatenated strings
+- rewrite numbers (binary, octal, decimal, hexadecimal) to shorter representations
+
+Options:
+
+- `KeepVarNames` keeps variable names as they are and omits shortening variable names
+- `Precision` number of significant digits to preserve for numbers, `0` means no trimming
+
+### Comparison with other tools
+
+Performance is measured with `time [command]` ran 10 times and selecting the fastest one, on a Thinkpad T460 (i5-6300U quad-core 2.4GHz running Arch Linux) using Go 1.15.
+
+- [minify](https://github.com/tdewolff/minify): `minify -o script.min.js script.js`
+- [esbuild](https://github.com/evanw/esbuild): `esbuild --minify --outfile=script.min.js script.js`
+- [terser](https://github.com/terser/terser): `terser script.js --compress --mangle -o script.min.js`
+- [UglifyJS](https://github.com/Skalman/UglifyJS-online): `uglifyjs --compress --mangle -o script.min.js script.js`
+- [Closure Compiler](https://github.com/google/closure-compiler): `closure-compiler -O SIMPLE --js script.js --js_output_file script.min.js --language_in ECMASCRIPT_NEXT -W QUIET --jscomp_off=checkVars` optimization level `SIMPLE` instead of `ADVANCED` to make similar assumptions as do the other tools (do not rename/assume anything of global level variables)
+
+#### Compression ratio (lower is better)
+All tools give very similar results, although UglifyJS compresses slightly better.
+
+| Tool | ace.js | dot.js | jquery.js | jqueryui.js | moment.js |
+| --- | --- | --- | --- | --- | --- |
+| **minify** | 53.7% | 64.8% | 34.2% | 51.3% | 34.8% |
+| esbuild | 53.8% | 66.3% | 34.4% | 53.1% | 34.8% |
+| terser | 53.2% | 65.2% | 34.2% | 51.8% | 34.7% |
+| UglifyJS | 53.1% | 64.7% | 33.8% | 50.7% | 34.2% |
+| Closure Compiler | 53.4% | 64.0% | 35.7% | 53.6% | 34.3% |
+
+#### Time (lower is better)
+Most tools are extremely slow, with `minify` and `esbuild` being orders of magnitudes faster.
+
+| Tool | ace.js | dot.js | jquery.js | jqueryui.js | moment.js |
+| --- | --- | --- | --- | --- | --- |
+| **minify** | 49ms | 5ms | 22ms | 35ms | 13ms |
+| esbuild | 64ms | 9ms | 31ms | 51ms | 17ms |
+| terser | 2900s | 180ms | 1400ms | 2200ms | 730ms |
+| UglifyJS | 3900ms | 210ms | 2000ms | 3100ms | 910ms |
+| Closure Compiler | 6100ms | 2500ms | 4400ms | 5300ms | 3500ms |
+
+## JSON
+
+Minification typically shaves off about 15% of filesize for common indented JSON such as generated by [JSON Generator](http://www.json-generator.com/).
+
+The JSON minifier only removes whitespace, which is the only thing that can be left out, and minifies numbers (`1000` => `1e3`).
+
+Options:
+
+- `Precision` number of significant digits to preserve for numbers, `0` means no trimming
+- `KeepNumbers` do not minify numbers if set to `true`, by default numbers will be minified
+
+## SVG
+
+The SVG minifier uses these minifications:
+
+- trim and collapse whitespace between all tags
+- strip comments, empty `doctype`, XML prelude, `metadata`
+- strip SVG version
+- strip CDATA sections wherever possible
+- collapse tags with no content to a void tag
+- minify style tag and attributes with the CSS minifier
+- minify colors
+- shorten lengths and numbers and remove default `px` unit
+- shorten `path` data
+- use relative or absolute positions in path data whichever is shorter
+
+TODO:
+- convert attributes to style attribute whenever shorter
+- merge path data? (same style and no intersection -- the latter is difficult)
+
+Options:
+
+- `Precision` number of significant digits to preserve for numbers, `0` means no trimming
+
+## XML
+
+The XML minifier uses these minifications:
+
+- strip unnecessary whitespace and otherwise collapse it to one space (or newline if it originally contained a newline)
+- strip comments
+- collapse tags with no content to a void tag
+- strip CDATA sections wherever possible
+
+Options:
+
+- `KeepWhitespace` preserve whitespace between inline tags but still collapse multiple whitespace characters into one
+
+## Usage
+Any input stream is being buffered by the minification functions. This is how the underlying buffer package inherently works to ensure high performance. The output stream however is not buffered. It is wise to preallocate a buffer as big as the input to which the output is written, or otherwise use `bufio` to buffer to a streaming writer.
+
+### New
+Retrieve a minifier struct which holds a map of mediatype &#8594; minifier functions.
+``` go
+m := minify.New()
+```
+
+The following loads all provided minifiers.
+``` go
+m := minify.New()
+m.AddFunc("text/css", css.Minify)
+m.AddFunc("text/html", html.Minify)
+m.AddFunc("image/svg+xml", svg.Minify)
+m.AddFuncRegexp(regexp.MustCompile("^(application|text)/(x-)?(java|ecma)script$"), js.Minify)
+m.AddFuncRegexp(regexp.MustCompile("[/+]json$"), json.Minify)
+m.AddFuncRegexp(regexp.MustCompile("[/+]xml$"), xml.Minify)
+```
+
+You can set options to several minifiers.
+``` go
+m.Add("text/html", &html.Minifier{
+	KeepDefaultAttrVals: true,
+	KeepWhitespace: true,
+})
+```
+
+### From reader
+Minify from an `io.Reader` to an `io.Writer` for a specific mediatype.
+``` go
+if err := m.Minify(mediatype, w, r); err != nil {
+	panic(err)
+}
+```
+
+### From bytes
+Minify from and to a `[]byte` for a specific mediatype.
+``` go
+b, err = m.Bytes(mediatype, b)
+if err != nil {
+	panic(err)
+}
+```
+
+### From string
+Minify from and to a `string` for a specific mediatype.
+``` go
+s, err = m.String(mediatype, s)
+if err != nil {
+	panic(err)
+}
+```
+
+### To reader
+Get a minifying reader for a specific mediatype.
+``` go
+mr := m.Reader(mediatype, r)
+if _, err := mr.Read(b); err != nil {
+	panic(err)
+}
+```
+
+### To writer
+Get a minifying writer for a specific mediatype. Must be explicitly closed because it uses an `io.Pipe` underneath.
+``` go
+mw := m.Writer(mediatype, w)
+if mw.Write([]byte("input")); err != nil {
+	panic(err)
+}
+if err := mw.Close(); err != nil {
+	panic(err)
+}
+```
+
+### Middleware
+Minify resources on the fly using middleware. It passes a wrapped response writer to the handler that removes the Content-Length header. The minifier is chosen based on the Content-Type header or, if the header is empty, by the request URI file extension. This is on-the-fly processing, you should preferably cache the results though!
+``` go
+fs := http.FileServer(http.Dir("www/"))
+http.Handle("/", m.Middleware(fs))
+```
+
+### Custom minifier
+Add a minifier for a specific mimetype.
+``` go
+type CustomMinifier struct {
+	KeepLineBreaks bool
+}
+
+func (c *CustomMinifier) Minify(m *minify.M, w io.Writer, r io.Reader, params map[string]string) error {
+	// ...
+	return nil
+}
+
+m.Add(mimetype, &CustomMinifier{KeepLineBreaks: true})
+// or
+m.AddRegexp(regexp.MustCompile("/x-custom$"), &CustomMinifier{KeepLineBreaks: true})
+```
+
+Add a minify function for a specific mimetype.
+``` go
+m.AddFunc(mimetype, func(m *minify.M, w io.Writer, r io.Reader, params map[string]string) error {
+	// ...
+	return nil
+})
+m.AddFuncRegexp(regexp.MustCompile("/x-custom$"), func(m *minify.M, w io.Writer, r io.Reader, params map[string]string) error {
+	// ...
+	return nil
+})
+```
+
+Add a command `cmd` with arguments `args` for a specific mimetype.
+``` go
+m.AddCmd(mimetype, exec.Command(cmd, args...))
+m.AddCmdRegexp(regexp.MustCompile("/x-custom$"), exec.Command(cmd, args...))
+```
+
+### Mediatypes
+Using the `params map[string]string` argument one can pass parameters to the minifier such as seen in mediatypes (`type/subtype; key1=val2; key2=val2`). Examples are the encoding or charset of the data. Calling `Minify` will split the mimetype and parameters for the minifiers for you, but `MinifyMimetype` can be used if you already have them split up.
+
+Minifiers can also be added using a regular expression. For example a minifier with `image/.*` will match any image mime.
+
+## Examples
+### Common minifiers
+Basic example that minifies from stdin to stdout and loads the default HTML, CSS and JS minifiers. Optionally, one can enable `java -jar build/compiler.jar` to run for JS (for example the [ClosureCompiler](https://code.google.com/p/closure-compiler/)). Note that reading the file into a buffer first and writing to a pre-allocated buffer would be faster (but would disable streaming).
+``` go
+package main
+
+import (
+	"log"
+	"os"
+	"os/exec"
+
+	"github.com/tdewolff/minify/v2"
+	"github.com/tdewolff/minify/v2/css"
+	"github.com/tdewolff/minify/v2/html"
+	"github.com/tdewolff/minify/v2/js"
+	"github.com/tdewolff/minify/v2/json"
+	"github.com/tdewolff/minify/v2/svg"
+	"github.com/tdewolff/minify/v2/xml"
+)
+
+func main() {
+	m := minify.New()
+	m.AddFunc("text/css", css.Minify)
+	m.AddFunc("text/html", html.Minify)
+	m.AddFunc("image/svg+xml", svg.Minify)
+	m.AddFuncRegexp(regexp.MustCompile("^(application|text)/(x-)?(java|ecma)script$"), js.Minify)
+	m.AddFuncRegexp(regexp.MustCompile("[/+]json$"), json.Minify)
+	m.AddFuncRegexp(regexp.MustCompile("[/+]xml$"), xml.Minify)
+
+	if err := m.Minify("text/html", os.Stdout, os.Stdin); err != nil {
+		panic(err)
+	}
+}
+```
+
+### External minifiers
+Below are some examples of using common external minifiers.
+
+#### Closure Compiler
+See [Closure Compiler Application](https://developers.google.com/closure/compiler/docs/gettingstarted_app). Not tested.
+
+``` go
+m.AddCmdRegexp(regexp.MustCompile("^(application|text)/(x-)?(java|ecma)script$"),
+    exec.Command("java", "-jar", "build/compiler.jar"))
+```
+
+### UglifyJS
+See [UglifyJS](https://github.com/mishoo/UglifyJS2).
+
+``` go
+m.AddCmdRegexp(regexp.MustCompile("^(application|text)/(x-)?(java|ecma)script$"),
+    exec.Command("uglifyjs"))
+```
+
+### esbuild
+See [esbuild](https://github.com/evanw/esbuild).
+
+``` go
+m.AddCmdRegexp(regexp.MustCompile("^(application|text)/(x-)?(java|ecma)script$"),
+    exec.Command("esbuild", "$in.js", "--minify", "--outfile=$out.js"))
+```
+
+### <a name="custom-minifier-example"></a> Custom minifier
+Custom minifier showing an example that implements the minifier function interface. Within a custom minifier, it is possible to call any minifier function (through `m minify.Minifier`) recursively when dealing with embedded resources.
+``` go
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"log"
+	"strings"
+
+	"github.com/tdewolff/minify/v2"
+)
+
+func main() {
+	m := minify.New()
+	m.AddFunc("text/plain", func(m *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {
+		// remove newlines and spaces
+		rb := bufio.NewReader(r)
+		for {
+			line, err := rb.ReadString('\n')
+			if err != nil && err != io.EOF {
+				return err
+			}
+			if _, errws := io.WriteString(w, strings.Replace(line, " ", "", -1)); errws != nil {
+				return errws
+			}
+			if err == io.EOF {
+				break
+			}
+		}
+		return nil
+	})
+
+	in := "Because my coffee was too cold, I heated it in the microwave."
+	out, err := m.String("text/plain", in)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(out)
+	// Output: Becausemycoffeewastoocold,Iheateditinthemicrowave.
+}
+```
+
+### ResponseWriter
+#### Middleware
+``` go
+func main() {
+	m := minify.New()
+	m.AddFunc("text/css", css.Minify)
+	m.AddFunc("text/html", html.Minify)
+	m.AddFunc("image/svg+xml", svg.Minify)
+	m.AddFuncRegexp(regexp.MustCompile("^(application|text)/(x-)?(java|ecma)script$"), js.Minify)
+	m.AddFuncRegexp(regexp.MustCompile("[/+]json$"), json.Minify)
+	m.AddFuncRegexp(regexp.MustCompile("[/+]xml$"), xml.Minify)
+
+	fs := http.FileServer(http.Dir("www/"))
+	http.Handle("/", m.Middleware(fs))
+}
+```
+
+#### ResponseWriter
+``` go
+func Serve(w http.ResponseWriter, r *http.Request) {
+	mw := m.ResponseWriter(w, r)
+	defer mw.Close()
+	w = mw
+
+	http.ServeFile(w, r, path.Join("www", r.URL.Path))
+}
+```
+
+#### Custom response writer
+ResponseWriter example which returns a ResponseWriter that minifies the content and then writes to the original ResponseWriter. Any write after applying this filter will be minified.
+``` go
+type MinifyResponseWriter struct {
+	http.ResponseWriter
+	io.WriteCloser
+}
+
+func (m MinifyResponseWriter) Write(b []byte) (int, error) {
+	return m.WriteCloser.Write(b)
+}
+
+// MinifyResponseWriter must be closed explicitly by calling site.
+func MinifyFilter(mediatype string, res http.ResponseWriter) MinifyResponseWriter {
+	m := minify.New()
+	// add minfiers
+
+	mw := m.Writer(mediatype, res)
+	return MinifyResponseWriter{res, mw}
+}
+```
+
+``` go
+// Usage
+func(w http.ResponseWriter, req *http.Request) {
+	w = MinifyFilter("text/html", w)
+	if _, err := io.WriteString(w, "<p class="message"> This HTTP response will be minified. </p>"); err != nil {
+		panic(err)
+	}
+	if err := w.Close(); err != nil {
+		panic(err)
+	}
+	// Output: <p class=message>This HTTP response will be minified.
+}
+```
+
+### Templates
+
+Here's an example of a replacement for `template.ParseFiles` from `template/html`, which automatically minifies each template before parsing it.
+
+Be aware that minifying templates will work in most cases but not all. Because the HTML minifier only works for valid HTML5, your template must be valid HTML5 of itself. Template tags are parsed as regular text by the minifier.
+
+``` go
+func compileTemplates(filenames ...string) (*template.Template, error) {
+	m := minify.New()
+	m.AddFunc("text/html", html.Minify)
+
+	var tmpl *template.Template
+	for _, filename := range filenames {
+		name := filepath.Base(filename)
+		if tmpl == nil {
+			tmpl = template.New(name)
+		} else {
+			tmpl = tmpl.New(name)
+		}
+
+		b, err := ioutil.ReadFile(filename)
+		if err != nil {
+			return nil, err
+		}
+
+		mb, err := m.Bytes("text/html", b)
+		if err != nil {
+			return nil, err
+		}
+		tmpl.Parse(string(mb))
+	}
+	return tmpl, nil
+}
+```
+
+Example usage:
+
+``` go
+templates := template.Must(compileTemplates("view.html", "home.html"))
+```
+
+## License
+Released under the [MIT license](LICENSE.md).
+
+[1]: http://golang.org/ "Go Language"

vendor/github.com/tdewolff/minify/v2/common.go

@@ -0,0 +1,515 @@
+package minify
+
+import (
+	"bytes"
+	"encoding/base64"
+
+	"github.com/tdewolff/parse/v2"
+	"github.com/tdewolff/parse/v2/strconv"
+)
+
+var (
+	textMimeBytes     = []byte("text/plain")
+	charsetASCIIBytes = []byte("charset=us-ascii")
+	dataBytes         = []byte("data:")
+	base64Bytes       = []byte(";base64")
+)
+
+// Epsilon is the closest number to zero that is not considered to be zero.
+var Epsilon = 0.00001
+
+// Mediatype minifies a given mediatype by removing all whitespace.
+func Mediatype(b []byte) []byte {
+	j := 0
+	start := 0
+	inString := false
+	for i, c := range b {
+		if !inString && parse.IsWhitespace(c) {
+			if start != 0 {
+				j += copy(b[j:], b[start:i])
+			} else {
+				j += i
+			}
+			start = i + 1
+		} else if c == '"' {
+			inString = !inString
+		}
+	}
+	if start != 0 {
+		j += copy(b[j:], b[start:])
+		return parse.ToLower(b[:j])
+	}
+	return parse.ToLower(b)
+}
+
+// DataURI minifies a data URI and calls a minifier by the specified mediatype. Specifications: https://www.ietf.org/rfc/rfc2397.txt.
+func DataURI(m *M, dataURI []byte) []byte {
+	origData := parse.Copy(dataURI)
+	mediatype, data, err := parse.DataURI(dataURI)
+	if err != nil {
+		return dataURI
+	}
+
+	data, _ = m.Bytes(string(mediatype), data)
+	base64Len := len(";base64") + base64.StdEncoding.EncodedLen(len(data))
+	asciiLen := len(data)
+	for _, c := range data {
+		if parse.DataURIEncodingTable[c] {
+			asciiLen += 2
+		}
+		if asciiLen > base64Len {
+			break
+		}
+	}
+	if len(origData) < base64Len && len(origData) < asciiLen {
+		return origData
+	}
+	if base64Len < asciiLen {
+		encoded := make([]byte, base64Len-len(";base64"))
+		base64.StdEncoding.Encode(encoded, data)
+		data = encoded
+		mediatype = append(mediatype, base64Bytes...)
+	} else {
+		data = parse.EncodeURL(data, parse.DataURIEncodingTable)
+	}
+	if len("text/plain") <= len(mediatype) && parse.EqualFold(mediatype[:len("text/plain")], textMimeBytes) {
+		mediatype = mediatype[len("text/plain"):]
+	}
+	for i := 0; i+len(";charset=us-ascii") <= len(mediatype); i++ {
+		// must start with semicolon and be followed by end of mediatype or semicolon
+		if mediatype[i] == ';' && parse.EqualFold(mediatype[i+1:i+len(";charset=us-ascii")], charsetASCIIBytes) && (i+len(";charset=us-ascii") >= len(mediatype) || mediatype[i+len(";charset=us-ascii")] == ';') {
+			mediatype = append(mediatype[:i], mediatype[i+len(";charset=us-ascii"):]...)
+			break
+		}
+	}
+	return append(append(append(dataBytes, mediatype...), ','), data...)
+}
+
+// MaxInt is the maximum value of int.
+const MaxInt = int(^uint(0) >> 1)
+
+// MinInt is the minimum value of int.
+const MinInt = -MaxInt - 1
+
+// Decimal minifies a given byte slice containing a decimal and removes superfluous characters. It differs from Number in that it does not parse exponents.
+// It does not parse or output exponents. prec is the number of significant digits. When prec is zero it will keep all digits. Only digits after the dot can be removed to reach the number of significant digits. Very large number may thus have more significant digits.
+func Decimal(num []byte, prec int) []byte {
+	if len(num) <= 1 {
+		return num
+	}
+
+	// omit first + and register mantissa start and end, whether it's negative and the exponent
+	neg := false
+	start := 0
+	dot := -1
+	end := len(num)
+	if 0 < end && (num[0] == '+' || num[0] == '-') {
+		if num[0] == '-' {
+			neg = true
+		}
+		start++
+	}
+	for i, c := range num[start:] {
+		if c == '.' {
+			dot = start + i
+			break
+		}
+	}
+	if dot == -1 {
+		dot = end
+	}
+
+	// trim leading zeros but leave at least one digit
+	for start < end-1 && num[start] == '0' {
+		start++
+	}
+	// trim trailing zeros
+	i := end - 1
+	for ; dot < i; i-- {
+		if num[i] != '0' {
+			end = i + 1
+			break
+		}
+	}
+	if i == dot {
+		end = dot
+		if start == end {
+			num[start] = '0'
+			return num[start : start+1]
+		}
+	} else if start == end-1 && num[start] == '0' {
+		return num[start:end]
+	}
+
+	// apply precision
+	if 0 < prec && dot <= start+prec {
+		precEnd := start + prec + 1 // include dot
+		if dot == start {           // for numbers like .012
+			digit := start + 1
+			for digit < end && num[digit] == '0' {
+				digit++
+			}
+			precEnd = digit + prec
+		}
+		if precEnd < end {
+			end = precEnd
+
+			// process either an increase from a lesser significant decimal (>= 5)
+			// or remove trailing zeros after the dot, or both
+			i := end - 1
+			inc := '5' <= num[end]
+			for ; start < i; i-- {
+				if i == dot {
+					// no-op
+				} else if inc && num[i] != '9' {
+					num[i]++
+					inc = false
+					break
+				} else if inc && i < dot { // end inc for integer
+					num[i] = '0'
+				} else if !inc && (i < dot || num[i] != '0') {
+					break
+				}
+			}
+			if i < dot {
+				end = dot
+			} else {
+				end = i + 1
+			}
+
+			if inc {
+				if dot == start && end == start+1 {
+					num[start] = '1'
+				} else if num[start] == '9' {
+					num[start] = '1'
+					num[start+1] = '0'
+					end++
+				} else {
+					num[start]++
+				}
+			}
+		}
+	}
+
+	if neg {
+		start--
+		num[start] = '-'
+	}
+	return num[start:end]
+}
+
+// Number minifies a given byte slice containing a number and removes superfluous characters.
+func Number(num []byte, prec int) []byte {
+	if len(num) <= 1 {
+		return num
+	}
+
+	// omit first + and register mantissa start and end, whether it's negative and the exponent
+	neg := false
+	start := 0
+	dot := -1
+	end := len(num)
+	origExp := 0
+	if num[0] == '+' || num[0] == '-' {
+		if num[0] == '-' {
+			neg = true
+		}
+		start++
+	}
+	for i, c := range num[start:] {
+		if c == '.' {
+			dot = start + i
+		} else if c == 'e' || c == 'E' {
+			end = start + i
+			i += start + 1
+			if i < len(num) && num[i] == '+' {
+				i++
+			}
+			if tmpOrigExp, n := strconv.ParseInt(num[i:]); 0 < n && int64(MinInt) <= tmpOrigExp && tmpOrigExp <= int64(MaxInt) {
+				// range checks for when int is 32 bit
+				origExp = int(tmpOrigExp)
+			} else {
+				return num
+			}
+			break
+		}
+	}
+	if dot == -1 {
+		dot = end
+	}
+
+	// trim leading zeros but leave at least one digit
+	for start < end-1 && num[start] == '0' {
+		start++
+	}
+	// trim trailing zeros
+	i := end - 1
+	for ; dot < i; i-- {
+		if num[i] != '0' {
+			end = i + 1
+			break
+		}
+	}
+	if i == dot {
+		end = dot
+		if start == end {
+			num[start] = '0'
+			return num[start : start+1]
+		}
+	} else if start == end-1 && num[start] == '0' {
+		return num[start:end]
+	}
+
+	// apply precision
+	if 0 < prec { //&& (dot <= start+prec || start+prec+1 < dot || 0 < origExp) { // don't minify 9 to 10, but do 999 to 1e3 and 99e1 to 1e3
+		precEnd := start + prec
+		if dot == start { // for numbers like .012
+			digit := start + 1
+			for digit < end && num[digit] == '0' {
+				digit++
+			}
+			precEnd = digit + prec
+		} else if dot < precEnd { // for numbers where precision will include the dot
+			precEnd++
+		}
+		if precEnd < end && (dot < end || 1 < dot-precEnd+origExp) { // do not minify 9=>10 or 99=>100 or 9e1=>1e2 (but 90), but 999=>1e3 and 99e1=>1e3
+			end = precEnd
+			inc := '5' <= num[end]
+			if dot == end {
+				inc = end+1 < len(num) && '5' <= num[end+1]
+			}
+			if precEnd < dot {
+				origExp += dot - precEnd
+				dot = precEnd
+			}
+			// process either an increase from a lesser significant decimal (>= 5)
+			// and remove trailing zeros
+			i := end - 1
+			for ; start < i; i-- {
+				if i == dot {
+					// no-op
+				} else if inc && num[i] != '9' {
+					num[i]++
+					inc = false
+					break
+				} else if !inc && num[i] != '0' {
+					break
+				}
+			}
+			end = i + 1
+			if end < dot {
+				origExp += dot - end
+				dot = end
+			}
+			if inc { // single digit left
+				if dot == start {
+					num[start] = '1'
+					dot = start + 1
+				} else if num[start] == '9' {
+					num[start] = '1'
+					origExp++
+				} else {
+					num[start]++
+				}
+			}
+		}
+	}
+
+	// n is the number of significant digits
+	// normExp would be the exponent if it were normalised (0.1 <= f < 1)
+	n := 0
+	normExp := 0
+	if dot == start {
+		for i = dot + 1; i < end; i++ {
+			if num[i] != '0' {
+				n = end - i
+				normExp = dot - i + 1
+				break
+			}
+		}
+	} else if dot == end {
+		normExp = end - start
+		for i = end - 1; start <= i; i-- {
+			if num[i] != '0' {
+				n = i + 1 - start
+				end = i + 1
+				break
+			}
+		}
+	} else {
+		n = end - start - 1
+		normExp = dot - start
+	}
+
+	if origExp < 0 && (normExp < MinInt-origExp || normExp-n < MinInt-origExp) || 0 < origExp && (MaxInt-origExp < normExp || MaxInt-origExp < normExp-n) {
+		return num // exponent overflow
+	}
+	normExp += origExp
+
+	// intExp would be the exponent if it were an integer
+	intExp := normExp - n
+	lenIntExp := strconv.LenInt(int64(intExp))
+	lenNormExp := strconv.LenInt(int64(normExp))
+
+	// there are three cases to consider when printing the number
+	// case 1: without decimals and with a positive exponent (large numbers: 5e4)
+	// case 2: with decimals and with a negative exponent (small numbers with many digits: .123456e-4)
+	// case 3: with decimals and without an exponent (around zero: 5.6)
+	// case 4: without decimals and with a negative exponent (small numbers: 123456e-9)
+	if n <= normExp {
+		// case 1: print number with positive exponent
+		if dot < end {
+			// remove dot, either from the front or copy the smallest part
+			if dot == start {
+				start = end - n
+			} else if dot-start < end-dot-1 {
+				copy(num[start+1:], num[start:dot])
+				start++
+			} else {
+				copy(num[dot:], num[dot+1:end])
+				end--
+			}
+		}
+		if n+3 <= normExp {
+			num[end] = 'e'
+			end++
+			for i := end + lenIntExp - 1; end <= i; i-- {
+				num[i] = byte(intExp%10) + '0'
+				intExp /= 10
+			}
+			end += lenIntExp
+		} else if n+2 == normExp {
+			num[end] = '0'
+			num[end+1] = '0'
+			end += 2
+		} else if n+1 == normExp {
+			num[end] = '0'
+			end++
+		}
+	} else if normExp < -3 && lenNormExp < lenIntExp && dot < end {
+		// case 2: print normalized number (0.1 <= f < 1)
+		zeroes := -normExp + origExp
+		if 0 < zeroes {
+			copy(num[start+1:], num[start+1+zeroes:end])
+			end -= zeroes
+		} else if zeroes < 0 {
+			copy(num[start+1:], num[start:dot])
+			num[start] = '.'
+		}
+		num[end] = 'e'
+		num[end+1] = '-'
+		end += 2
+		for i := end + lenNormExp - 1; end <= i; i-- {
+			num[i] = -byte(normExp%10) + '0'
+			normExp /= 10
+		}
+		end += lenNormExp
+	} else if -lenIntExp-1 <= normExp {
+		// case 3: print number without exponent
+		zeroes := -normExp
+		if 0 < zeroes {
+			// dot placed at the front and negative exponent, adding zeroes
+			newDot := end - n - zeroes - 1
+			if newDot != dot {
+				d := start - newDot
+				if 0 < d {
+					if dot < end {
+						// copy original digits after the dot towards the end
+						copy(num[dot+1+d:], num[dot+1:end])
+						if start < dot {
+							// copy original digits before the dot towards the end
+							copy(num[start+d+1:], num[start:dot])
+						}
+					} else if start < dot {
+						// copy original digits before the dot towards the end
+						copy(num[start+d:], num[start:dot])
+					}
+					newDot = start
+					end += d
+				} else {
+					start += -d
+				}
+				num[newDot] = '.'
+				for i := 0; i < zeroes; i++ {
+					num[newDot+1+i] = '0'
+				}
+			}
+		} else {
+			// dot placed in the middle of the number
+			if dot == start {
+				// when there are zeroes after the dot
+				dot = end - n - 1
+				start = dot
+			} else if end <= dot {
+				// when input has no dot in it
+				dot = end
+				end++
+			}
+			newDot := start + normExp
+			// move digits between dot and newDot towards the end
+			if dot < newDot {
+				copy(num[dot:], num[dot+1:newDot+1])
+			} else if newDot < dot {
+				copy(num[newDot+1:], num[newDot:dot])
+			}
+			num[newDot] = '.'
+		}
+	} else {
+		// case 4: print number with negative exponent
+		// find new end, considering moving numbers to the front, removing the dot and increasing the length of the exponent
+		newEnd := end
+		if dot == start {
+			newEnd = start + n
+		} else {
+			newEnd--
+		}
+		newEnd += 2 + lenIntExp
+
+		exp := intExp
+		lenExp := lenIntExp
+		if newEnd < len(num) {
+			// it saves space to convert the decimal to an integer and decrease the exponent
+			if dot < end {
+				if dot == start {
+					copy(num[start:], num[end-n:end])
+					end = start + n
+				} else {
+					copy(num[dot:], num[dot+1:end])
+					end--
+				}
+			}
+		} else {
+			// it does not save space and will panic, so we revert to the original representation
+			exp = origExp
+			lenExp = 1
+			if origExp <= -10 || 10 <= origExp {
+				lenExp = strconv.LenInt(int64(origExp))
+			}
+		}
+		num[end] = 'e'
+		num[end+1] = '-'
+		end += 2
+		for i := end + lenExp - 1; end <= i; i-- {
+			num[i] = -byte(exp%10) + '0'
+			exp /= 10
+		}
+		end += lenExp
+	}
+
+	if neg {
+		start--
+		num[start] = '-'
+	}
+	return num[start:end]
+}
+
+func UpdateErrorPosition(err error, input *parse.Input, offset int) error {
+	if perr, ok := err.(*parse.Error); ok {
+		r := bytes.NewBuffer(input.Bytes())
+		line, column, _ := parse.Position(r, offset)
+		perr.Line += line - 1
+		perr.Column += column - 1
+		return perr
+	}
+	return err
+}

vendor/github.com/tdewolff/minify/v2/go.mod

@@ -0,0 +1,14 @@
+module github.com/tdewolff/minify/v2
+
+go 1.13
+
+require (
+	github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927 // indirect
+	github.com/dustin/go-humanize v1.0.0
+	github.com/fsnotify/fsnotify v1.4.9
+	github.com/matryer/try v0.0.0-20161228173917-9ac251b645a2
+	github.com/spf13/pflag v1.0.5
+	github.com/tdewolff/parse/v2 v2.5.19
+	github.com/tdewolff/test v1.0.6
+	golang.org/x/sys v0.0.0-20210510120138-977fb7262007 // indirect
+)

vendor/github.com/tdewolff/minify/v2/go.sum

@@ -0,0 +1,17 @@
+github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927 h1:SKI1/fuSdodxmNNyVBR8d7X/HuLnRpvvFO0AgyQk764=
+github.com/cheekybits/is v0.0.0-20150225183255-68e9c0620927/go.mod h1:h/aW8ynjgkuj+NQRlZcDbAbM1ORAbXjXX77sX7T289U=
+github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo=
+github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
+github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
+github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
+github.com/matryer/try v0.0.0-20161228173917-9ac251b645a2 h1:JAEbJn3j/FrhdWA9jW8B5ajsLIjeuEHLi8xE4fk997o=
+github.com/matryer/try v0.0.0-20161228173917-9ac251b645a2/go.mod h1:0KeJpeMD6o+O4hW7qJOT7vyQPKrWmj26uf5wMc/IiIs=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/tdewolff/parse/v2 v2.5.19 h1:Kjaj3KQOx/4elIxlBSglus4E2oMfdROphvbq2b+OBZ0=
+github.com/tdewolff/parse/v2 v2.5.19/go.mod h1:WzaJpRSbwq++EIQHYIRTpbYKNA3gn9it1Ik++q4zyho=
+github.com/tdewolff/test v1.0.6 h1:76mzYJQ83Op284kMT+63iCNCI7NEERsIN8dLM+RiKr4=
+github.com/tdewolff/test v1.0.6/go.mod h1:6DAvZliBAAnD7rhVgwaM7DE5/d9NMOAJ09SqYqeK4QE=
+golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007 h1:gG67DSER+11cZvqIMb8S8bt0vZtiN6xWYARwirrOSfE=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

vendor/github.com/tdewolff/minify/v2/html/buffer.go

@@ -0,0 +1,137 @@
+package html
+
+import (
+	"github.com/tdewolff/parse/v2"
+	"github.com/tdewolff/parse/v2/html"
+)
+
+// Token is a single token unit with an attribute value (if given) and hash of the data.
+type Token struct {
+	html.TokenType
+	Hash    Hash
+	Data    []byte
+	Text    []byte
+	AttrVal []byte
+	Traits  traits
+	Offset  int
+}
+
+// TokenBuffer is a buffer that allows for token look-ahead.
+type TokenBuffer struct {
+	r *parse.Input
+	l *html.Lexer
+
+	buf []Token
+	pos int
+
+	attrBuffer []*Token
+}
+
+// NewTokenBuffer returns a new TokenBuffer.
+func NewTokenBuffer(r *parse.Input, l *html.Lexer) *TokenBuffer {
+	return &TokenBuffer{
+		r:   r,
+		l:   l,
+		buf: make([]Token, 0, 8),
+	}
+}
+
+func (z *TokenBuffer) read(t *Token) {
+	t.Offset = z.r.Offset()
+	t.TokenType, t.Data = z.l.Next()
+	t.Text = z.l.Text()
+	if t.TokenType == html.AttributeToken {
+		t.Offset += 1 + len(t.Text) + 1
+		t.AttrVal = z.l.AttrVal()
+		if len(t.AttrVal) > 1 && (t.AttrVal[0] == '"' || t.AttrVal[0] == '\'') {
+			t.Offset++
+			t.AttrVal = t.AttrVal[1 : len(t.AttrVal)-1] // quotes will be readded in attribute loop if necessary
+		}
+		t.Hash = ToHash(t.Text)
+		t.Traits = attrMap[t.Hash]
+	} else if t.TokenType == html.StartTagToken || t.TokenType == html.EndTagToken {
+		t.AttrVal = nil
+		t.Hash = ToHash(t.Text)
+		t.Traits = tagMap[t.Hash] // zero if not exist
+	} else {
+		t.AttrVal = nil
+		t.Hash = 0
+		t.Traits = 0
+	}
+}
+
+// Peek returns the ith element and possibly does an allocation.
+// Peeking past an error will panic.
+func (z *TokenBuffer) Peek(pos int) *Token {
+	pos += z.pos
+	if pos >= len(z.buf) {
+		if len(z.buf) > 0 && z.buf[len(z.buf)-1].TokenType == html.ErrorToken {
+			return &z.buf[len(z.buf)-1]
+		}
+
+		c := cap(z.buf)
+		d := len(z.buf) - z.pos
+		p := pos - z.pos + 1 // required peek length
+		var buf []Token
+		if 2*p > c {
+			buf = make([]Token, 0, 2*c+p)
+		} else {
+			buf = z.buf
+		}
+		copy(buf[:d], z.buf[z.pos:])
+
+		buf = buf[:p]
+		pos -= z.pos
+		for i := d; i < p; i++ {
+			z.read(&buf[i])
+			if buf[i].TokenType == html.ErrorToken {
+				buf = buf[:i+1]
+				pos = i
+				break
+			}
+		}
+		z.pos, z.buf = 0, buf
+	}
+	return &z.buf[pos]
+}
+
+// Shift returns the first element and advances position.
+func (z *TokenBuffer) Shift() *Token {
+	if z.pos >= len(z.buf) {
+		t := &z.buf[:1][0]
+		z.read(t)
+		return t
+	}
+	t := &z.buf[z.pos]
+	z.pos++
+	return t
+}
+
+// Attributes extracts the gives attribute hashes from a tag.
+// It returns in the same order pointers to the requested token data or nil.
+func (z *TokenBuffer) Attributes(hashes ...Hash) []*Token {
+	n := 0
+	for {
+		if t := z.Peek(n); t.TokenType != html.AttributeToken {
+			break
+		}
+		n++
+	}
+	if len(hashes) > cap(z.attrBuffer) {
+		z.attrBuffer = make([]*Token, len(hashes))
+	} else {
+		z.attrBuffer = z.attrBuffer[:len(hashes)]
+		for i := range z.attrBuffer {
+			z.attrBuffer[i] = nil
+		}
+	}
+	for i := z.pos; i < z.pos+n; i++ {
+		attr := &z.buf[i]
+		for j, hash := range hashes {
+			if hash == attr.Hash {
+				z.attrBuffer[j] = attr
+			}
+		}
+	}
+	return z.attrBuffer
+}

vendor/github.com/tdewolff/minify/v2/html/hash.go

@@ -0,0 +1,543 @@
+package html
+
+// generated by hasher -type=Hash -file=hash.go; DO NOT EDIT, except for adding more constants to the list and rerun go generate
+
+// uses github.com/tdewolff/hasher
+//go:generate hasher -type=Hash -file=hash.go
+
+// Hash defines perfect hashes for a predefined list of strings
+type Hash uint32
+
+// Unique hash definitions to be used instead of strings
+const (
+	A               Hash = 0x1     // a
+	Abbr            Hash = 0x37a04 // abbr
+	About           Hash = 0x5     // about
+	Accept          Hash = 0x1106  // accept
+	Accept_Charset  Hash = 0x110e  // accept-charset
+	Action          Hash = 0x23f06 // action
+	Address         Hash = 0x5a07  // address
+	Align           Hash = 0x32705 // align
+	Alink           Hash = 0x7005  // alink
+	Allowfullscreen Hash = 0x2ad0f // allowfullscreen
+	Amp_Boilerplate Hash = 0x610f  // amp-boilerplate
+	Area            Hash = 0x1e304 // area
+	Article         Hash = 0x2707  // article
+	Aside           Hash = 0xb405  // aside
+	Async           Hash = 0xac05  // async
+	Audio           Hash = 0xd105  // audio
+	Autofocus       Hash = 0xe409  // autofocus
+	Autoplay        Hash = 0x10808 // autoplay
+	Axis            Hash = 0x11004 // axis
+	B               Hash = 0x101   // b
+	Background      Hash = 0x300a  // background
+	Base            Hash = 0x19604 // base
+	Bb              Hash = 0x37b02 // bb
+	Bdi             Hash = 0x7503  // bdi
+	Bdo             Hash = 0x31f03 // bdo
+	Bgcolor         Hash = 0x12607 // bgcolor
+	Blockquote      Hash = 0x13e0a // blockquote
+	Body            Hash = 0xd04   // body
+	Br              Hash = 0x37c02 // br
+	Button          Hash = 0x14806 // button
+	Canvas          Hash = 0xb006  // canvas
+	Caption         Hash = 0x21f07 // caption
+	Charset         Hash = 0x1807  // charset
+	Checked         Hash = 0x1b307 // checked
+	Cite            Hash = 0xfb04  // cite
+	Class           Hash = 0x15905 // class
+	Classid         Hash = 0x15907 // classid
+	Clear           Hash = 0x2b05  // clear
+	Code            Hash = 0x19204 // code
+	Codebase        Hash = 0x19208 // codebase
+	Codetype        Hash = 0x1a408 // codetype
+	Col             Hash = 0x12803 // col
+	Colgroup        Hash = 0x1bb08 // colgroup
+	Color           Hash = 0x12805 // color
+	Cols            Hash = 0x1cf04 // cols
+	Colspan         Hash = 0x1cf07 // colspan
+	Compact         Hash = 0x1ec07 // compact
+	Content         Hash = 0x28407 // content
+	Controls        Hash = 0x20108 // controls
+	Data            Hash = 0x1f04  // data
+	Datalist        Hash = 0x1f08  // datalist
+	Datatype        Hash = 0x4d08  // datatype
+	Dd              Hash = 0x5b02  // dd
+	Declare         Hash = 0xb707  // declare
+	Default         Hash = 0x7f07  // default
+	DefaultChecked  Hash = 0x1730e // defaultChecked
+	DefaultMuted    Hash = 0x7f0c  // defaultMuted
+	DefaultSelected Hash = 0x8a0f  // defaultSelected
+	Defer           Hash = 0x9805  // defer
+	Del             Hash = 0x10503 // del
+	Details         Hash = 0x15f07 // details
+	Dfn             Hash = 0x16c03 // dfn
+	Dialog          Hash = 0xa606  // dialog
+	Dir             Hash = 0x7603  // dir
+	Disabled        Hash = 0x18008 // disabled
+	Div             Hash = 0x18703 // div
+	Dl              Hash = 0x1b902 // dl
+	Dt              Hash = 0x23102 // dt
+	Em              Hash = 0x4302  // em
+	Embed           Hash = 0x4905  // embed
+	Enabled         Hash = 0x26c07 // enabled
+	Enctype         Hash = 0x1fa07 // enctype
+	Face            Hash = 0x5604  // face
+	Fieldset        Hash = 0x21408 // fieldset
+	Figcaption      Hash = 0x21c0a // figcaption
+	Figure          Hash = 0x22606 // figure
+	Footer          Hash = 0xdb06  // footer
+	For             Hash = 0x23b03 // for
+	Form            Hash = 0x23b04 // form
+	Formaction      Hash = 0x23b0a // formaction
+	Formnovalidate  Hash = 0x2450e // formnovalidate
+	Frame           Hash = 0x28c05 // frame
+	Frameborder     Hash = 0x28c0b // frameborder
+	H1              Hash = 0x2e002 // h1
+	H2              Hash = 0x25302 // h2
+	H3              Hash = 0x25502 // h3
+	H4              Hash = 0x25702 // h4
+	H5              Hash = 0x25902 // h5
+	H6              Hash = 0x25b02 // h6
+	Head            Hash = 0x2d204 // head
+	Header          Hash = 0x2d206 // header
+	Hgroup          Hash = 0x25d06 // hgroup
+	Hidden          Hash = 0x26806 // hidden
+	Hr              Hash = 0x32d02 // hr
+	Href            Hash = 0x32d04 // href
+	Hreflang        Hash = 0x32d08 // hreflang
+	Html            Hash = 0x27304 // html
+	Http_Equiv      Hash = 0x2770a // http-equiv
+	I               Hash = 0x2401  // i
+	Icon            Hash = 0x28304 // icon
+	Id              Hash = 0xb602  // id
+	Iframe          Hash = 0x28b06 // iframe
+	Img             Hash = 0x29703 // img
+	Inert           Hash = 0xf605  // inert
+	Inlist          Hash = 0x29a06 // inlist
+	Input           Hash = 0x2a405 // input
+	Ins             Hash = 0x2a903 // ins
+	Ismap           Hash = 0x11205 // ismap
+	Itemscope       Hash = 0xfc09  // itemscope
+	Kbd             Hash = 0x7403  // kbd
+	Keygen          Hash = 0x1f606 // keygen
+	Label           Hash = 0xbe05  // label
+	Lang            Hash = 0x33104 // lang
+	Language        Hash = 0x33108 // language
+	Legend          Hash = 0x2c506 // legend
+	Li              Hash = 0x2302  // li
+	Link            Hash = 0x7104  // link
+	Longdesc        Hash = 0xc208  // longdesc
+	Main            Hash = 0xf404  // main
+	Manifest        Hash = 0x2bc08 // manifest
+	Map             Hash = 0xee03  // map
+	Mark            Hash = 0x2cb04 // mark
+	Math            Hash = 0x2cf04 // math
+	Max             Hash = 0x2d803 // max
+	Maxlength       Hash = 0x2d809 // maxlength
+	Media           Hash = 0xa405  // media
+	Menu            Hash = 0x12204 // menu
+	Meta            Hash = 0x2e204 // meta
+	Meter           Hash = 0x2f705 // meter
+	Method          Hash = 0x2fc06 // method
+	Multiple        Hash = 0x30208 // multiple
+	Muted           Hash = 0x30a05 // muted
+	Name            Hash = 0xa204  // name
+	Nav             Hash = 0x32403 // nav
+	Nohref          Hash = 0x32b06 // nohref
+	Noresize        Hash = 0x13608 // noresize
+	Noscript        Hash = 0x14d08 // noscript
+	Noshade         Hash = 0x16e07 // noshade
+	Novalidate      Hash = 0x2490a // novalidate
+	Nowrap          Hash = 0x1d506 // nowrap
+	Object          Hash = 0xd506  // object
+	Ol              Hash = 0xcb02  // ol
+	Open            Hash = 0x32104 // open
+	Optgroup        Hash = 0x35608 // optgroup
+	Option          Hash = 0x30f06 // option
+	Output          Hash = 0x206   // output
+	P               Hash = 0x501   // p
+	Param           Hash = 0xf005  // param
+	Pauseonexit     Hash = 0x1160b // pauseonexit
+	Picture         Hash = 0x1c207 // picture
+	Plaintext       Hash = 0x1da09 // plaintext
+	Poster          Hash = 0x26206 // poster
+	Pre             Hash = 0x35d03 // pre
+	Prefix          Hash = 0x35d06 // prefix
+	Profile         Hash = 0x36407 // profile
+	Progress        Hash = 0x34208 // progress
+	Property        Hash = 0x31508 // property
+	Q               Hash = 0x14301 // q
+	Rb              Hash = 0x2f02  // rb
+	Readonly        Hash = 0x1e408 // readonly
+	Rel             Hash = 0xbc03  // rel
+	Required        Hash = 0x22a08 // required
+	Resource        Hash = 0x1c708 // resource
+	Rev             Hash = 0x7803  // rev
+	Reversed        Hash = 0x7808  // reversed
+	Rows            Hash = 0x9c04  // rows
+	Rowspan         Hash = 0x9c07  // rowspan
+	Rp              Hash = 0x6a02  // rp
+	Rt              Hash = 0x2802  // rt
+	Rtc             Hash = 0xf903  // rtc
+	Ruby            Hash = 0xe004  // ruby
+	Rules           Hash = 0x12c05 // rules
+	S               Hash = 0x1c01  // s
+	Samp            Hash = 0x6004  // samp
+	Scope           Hash = 0x10005 // scope
+	Scoped          Hash = 0x10006 // scoped
+	Script          Hash = 0x14f06 // script
+	Scrolling       Hash = 0xc809  // scrolling
+	Seamless        Hash = 0x19808 // seamless
+	Section         Hash = 0x13007 // section
+	Select          Hash = 0x16506 // select
+	Selected        Hash = 0x16508 // selected
+	Shape           Hash = 0x19f05 // shape
+	Size            Hash = 0x13a04 // size
+	Slot            Hash = 0x20804 // slot
+	Small           Hash = 0x2ab05 // small
+	Sortable        Hash = 0x2ef08 // sortable
+	Source          Hash = 0x1c906 // source
+	Span            Hash = 0x9f04  // span
+	Src             Hash = 0x34903 // src
+	Srcset          Hash = 0x34906 // srcset
+	Start           Hash = 0x2505  // start
+	Strong          Hash = 0x29e06 // strong
+	Style           Hash = 0x2c205 // style
+	Sub             Hash = 0x31d03 // sub
+	Summary         Hash = 0x33907 // summary
+	Sup             Hash = 0x34003 // sup
+	Svg             Hash = 0x34f03 // svg
+	Tabindex        Hash = 0x2e408 // tabindex
+	Table           Hash = 0x2f205 // table
+	Target          Hash = 0x706   // target
+	Tbody           Hash = 0xc05   // tbody
+	Td              Hash = 0x1e02  // td
+	Template        Hash = 0x4208  // template
+	Text            Hash = 0x1df04 // text
+	Textarea        Hash = 0x1df08 // textarea
+	Tfoot           Hash = 0xda05  // tfoot
+	Th              Hash = 0x2d102 // th
+	Thead           Hash = 0x2d105 // thead
+	Time            Hash = 0x12004 // time
+	Title           Hash = 0x15405 // title
+	Tr              Hash = 0x1f202 // tr
+	Track           Hash = 0x1f205 // track
+	Translate       Hash = 0x20b09 // translate
+	Truespeed       Hash = 0x23209 // truespeed
+	Type            Hash = 0x5104  // type
+	Typemustmatch   Hash = 0x1a80d // typemustmatch
+	Typeof          Hash = 0x5106  // typeof
+	U               Hash = 0x301   // u
+	Ul              Hash = 0x8302  // ul
+	Undeterminate   Hash = 0x370d  // undeterminate
+	Usemap          Hash = 0xeb06  // usemap
+	Valign          Hash = 0x32606 // valign
+	Value           Hash = 0x18905 // value
+	Valuetype       Hash = 0x18909 // valuetype
+	Var             Hash = 0x28003 // var
+	Video           Hash = 0x35205 // video
+	Visible         Hash = 0x36b07 // visible
+	Vlink           Hash = 0x37205 // vlink
+	Vocab           Hash = 0x37705 // vocab
+	Wbr             Hash = 0x37e03 // wbr
+	Xmlns           Hash = 0x2eb05 // xmlns
+	Xmp             Hash = 0x36203 // xmp
+)
+
+// String returns the hash' name.
+func (i Hash) String() string {
+	start := uint32(i >> 8)
+	n := uint32(i & 0xff)
+	if start+n > uint32(len(_Hash_text)) {
+		return ""
+	}
+	return _Hash_text[start : start+n]
+}
+
+// ToHash returns the hash whose name is s. It returns zero if there is no
+// such hash. It is case sensitive.
+func ToHash(s []byte) Hash {
+	if len(s) == 0 || len(s) > _Hash_maxLen {
+		return 0
+	}
+	h := uint32(_Hash_hash0)
+	for i := 0; i < len(s); i++ {
+		h ^= uint32(s[i])
+		h *= 16777619
+	}
+	if i := _Hash_table[h&uint32(len(_Hash_table)-1)]; int(i&0xff) == len(s) {
+		t := _Hash_text[i>>8 : i>>8+i&0xff]
+		for i := 0; i < len(s); i++ {
+			if t[i] != s[i] {
+				goto NEXT
+			}
+		}
+		return i
+	}
+NEXT:
+	if i := _Hash_table[(h>>16)&uint32(len(_Hash_table)-1)]; int(i&0xff) == len(s) {
+		t := _Hash_text[i>>8 : i>>8+i&0xff]
+		for i := 0; i < len(s); i++ {
+			if t[i] != s[i] {
+				return 0
+			}
+		}
+		return i
+	}
+	return 0
+}
+
+const _Hash_hash0 = 0x9acb0442
+const _Hash_maxLen = 15
+const _Hash_text = "aboutputargetbodyaccept-charsetdatalistarticlearbackgroundet" +
+	"erminatemplatembedatatypeofaceaddressamp-boilerplatealinkbdi" +
+	"reversedefaultMutedefaultSelectedeferowspanamedialogasyncanv" +
+	"asideclarelabelongdescrollingaudiobjectfooterubyautofocusema" +
+	"paramainertcitemscopedelautoplayaxismapauseonexitimenubgcolo" +
+	"rulesectionoresizeblockquotebuttonoscriptitleclassidetailsel" +
+	"ectedfnoshadefaultCheckedisabledivaluetypecodebaseamlesshape" +
+	"codetypemustmatcheckedlcolgroupicturesourcecolspanowraplaint" +
+	"extareadonlycompactrackeygenctypecontrolslotranslatefieldset" +
+	"figcaptionfigurequiredtruespeedformactionformnovalidateh2h3h" +
+	"4h5h6hgrouposterhiddenabledhtmlhttp-equivaricontentiframebor" +
+	"derimginlistronginputinsmallowfullscreenmanifestylegendmarkm" +
+	"atheadermaxlength1metabindexmlnsortablemetermethodmultiplemu" +
+	"tedoptionpropertysubdopenavalignohreflanguagesummarysuprogre" +
+	"ssrcsetsvgvideoptgrouprefixmprofilevisiblevlinkvocabbrwbr"
+
+var _Hash_table = [1 << 9]Hash{
+	0x0:   0x1df08, // textarea
+	0x4:   0x32d02, // hr
+	0x8:   0x1c207, // picture
+	0xb:   0x18905, // value
+	0xf:   0x2e408, // tabindex
+	0x12:  0x15905, // class
+	0x15:  0x37e03, // wbr
+	0x18:  0x1a80d, // typemustmatch
+	0x1a:  0x1b902, // dl
+	0x1d:  0xf903,  // rtc
+	0x1e:  0x25702, // h4
+	0x22:  0x2ef08, // sortable
+	0x24:  0x4208,  // template
+	0x25:  0x28c0b, // frameborder
+	0x28:  0x37a04, // abbr
+	0x29:  0x28b06, // iframe
+	0x2a:  0x610f,  // amp-boilerplate
+	0x2c:  0x1e408, // readonly
+	0x30:  0x23f06, // action
+	0x33:  0x28c05, // frame
+	0x35:  0x12c05, // rules
+	0x36:  0x30208, // multiple
+	0x38:  0x31f03, // bdo
+	0x39:  0x1d506, // nowrap
+	0x3e:  0x21408, // fieldset
+	0x3f:  0x7503,  // bdi
+	0x46:  0x7f0c,  // defaultMuted
+	0x49:  0x35205, // video
+	0x4c:  0x19808, // seamless
+	0x4d:  0x13608, // noresize
+	0x4f:  0xb602,  // id
+	0x51:  0x25d06, // hgroup
+	0x52:  0x23102, // dt
+	0x55:  0x12805, // color
+	0x56:  0x34003, // sup
+	0x59:  0x370d,  // undeterminate
+	0x5a:  0x35608, // optgroup
+	0x5b:  0x2d206, // header
+	0x5c:  0xb405,  // aside
+	0x5f:  0x10005, // scope
+	0x60:  0x101,   // b
+	0x61:  0xcb02,  // ol
+	0x64:  0x32b06, // nohref
+	0x65:  0x1da09, // plaintext
+	0x66:  0x20804, // slot
+	0x67:  0x11004, // axis
+	0x68:  0x12803, // col
+	0x69:  0x32606, // valign
+	0x6c:  0x2d105, // thead
+	0x70:  0x34906, // srcset
+	0x71:  0x26806, // hidden
+	0x76:  0x1bb08, // colgroup
+	0x78:  0x34f03, // svg
+	0x7b:  0x2cb04, // mark
+	0x7e:  0x33104, // lang
+	0x81:  0x1cf04, // cols
+	0x86:  0x5a07,  // address
+	0x8b:  0xf404,  // main
+	0x8c:  0x4302,  // em
+	0x8f:  0x32d08, // hreflang
+	0x93:  0x1b307, // checked
+	0x94:  0x25902, // h5
+	0x95:  0x301,   // u
+	0x96:  0x32705, // align
+	0x97:  0x14301, // q
+	0x99:  0xd506,  // object
+	0x9b:  0x28407, // content
+	0x9d:  0xc809,  // scrolling
+	0x9f:  0x36407, // profile
+	0xa0:  0x34903, // src
+	0xa1:  0xda05,  // tfoot
+	0xa3:  0x2f705, // meter
+	0xa4:  0x37705, // vocab
+	0xa6:  0xd04,   // body
+	0xa8:  0x19204, // code
+	0xac:  0x20108, // controls
+	0xb0:  0x2ab05, // small
+	0xb1:  0x18008, // disabled
+	0xb5:  0x5604,  // face
+	0xb6:  0x501,   // p
+	0xb9:  0x2302,  // li
+	0xbb:  0xe409,  // autofocus
+	0xbf:  0x27304, // html
+	0xc2:  0x4d08,  // datatype
+	0xc6:  0x35d06, // prefix
+	0xcb:  0x35d03, // pre
+	0xcc:  0x1106,  // accept
+	0xd1:  0x23b03, // for
+	0xd5:  0x29e06, // strong
+	0xd6:  0x9c07,  // rowspan
+	0xd7:  0x25502, // h3
+	0xd8:  0x2cf04, // math
+	0xde:  0x16e07, // noshade
+	0xdf:  0x19f05, // shape
+	0xe1:  0x10006, // scoped
+	0xe3:  0x706,   // target
+	0xe6:  0x21c0a, // figcaption
+	0xe9:  0x1df04, // text
+	0xea:  0x1c708, // resource
+	0xec:  0xee03,  // map
+	0xf0:  0x29a06, // inlist
+	0xf1:  0x16506, // select
+	0xf2:  0x1f606, // keygen
+	0xf3:  0x5106,  // typeof
+	0xf6:  0xb006,  // canvas
+	0xf7:  0x30f06, // option
+	0xf8:  0xbe05,  // label
+	0xf9:  0xbc03,  // rel
+	0xfb:  0x1f04,  // data
+	0xfd:  0x6004,  // samp
+	0x100: 0x110e,  // accept-charset
+	0x101: 0xeb06,  // usemap
+	0x103: 0x2bc08, // manifest
+	0x109: 0xa204,  // name
+	0x10a: 0x14806, // button
+	0x10b: 0x2b05,  // clear
+	0x10e: 0x33907, // summary
+	0x10f: 0x2e204, // meta
+	0x110: 0x33108, // language
+	0x112: 0x300a,  // background
+	0x113: 0x2707,  // article
+	0x116: 0x23b0a, // formaction
+	0x119: 0x1,     // a
+	0x11b: 0x5,     // about
+	0x11c: 0xfc09,  // itemscope
+	0x11e: 0x14d08, // noscript
+	0x11f: 0x15907, // classid
+	0x120: 0x36203, // xmp
+	0x121: 0x19604, // base
+	0x123: 0x1c01,  // s
+	0x124: 0x36b07, // visible
+	0x126: 0x37b02, // bb
+	0x127: 0x9c04,  // rows
+	0x12d: 0x2450e, // formnovalidate
+	0x131: 0x1f205, // track
+	0x135: 0x18703, // div
+	0x136: 0xac05,  // async
+	0x137: 0x31508, // property
+	0x13a: 0x16c03, // dfn
+	0x13e: 0xf605,  // inert
+	0x142: 0x10503, // del
+	0x144: 0x25302, // h2
+	0x147: 0x2c205, // style
+	0x149: 0x29703, // img
+	0x14a: 0xc05,   // tbody
+	0x14b: 0x7603,  // dir
+	0x14c: 0x2eb05, // xmlns
+	0x14e: 0x1f08,  // datalist
+	0x14f: 0x32d04, // href
+	0x150: 0x1f202, // tr
+	0x151: 0x13e0a, // blockquote
+	0x152: 0x18909, // valuetype
+	0x155: 0xdb06,  // footer
+	0x157: 0x14f06, // script
+	0x158: 0x1cf07, // colspan
+	0x15d: 0x1730e, // defaultChecked
+	0x15f: 0x2490a, // novalidate
+	0x164: 0x1a408, // codetype
+	0x165: 0x2c506, // legend
+	0x16b: 0x1160b, // pauseonexit
+	0x16c: 0x21f07, // caption
+	0x16f: 0x26c07, // enabled
+	0x173: 0x26206, // poster
+	0x175: 0x30a05, // muted
+	0x176: 0x11205, // ismap
+	0x178: 0x2a903, // ins
+	0x17a: 0xe004,  // ruby
+	0x17b: 0x37c02, // br
+	0x17c: 0x8a0f,  // defaultSelected
+	0x17d: 0x7403,  // kbd
+	0x17f: 0x1c906, // source
+	0x182: 0x9f04,  // span
+	0x184: 0x2d803, // max
+	0x18a: 0x5b02,  // dd
+	0x18b: 0x13a04, // size
+	0x18c: 0xa405,  // media
+	0x18d: 0x19208, // codebase
+	0x18f: 0x4905,  // embed
+	0x192: 0x5104,  // type
+	0x193: 0xf005,  // param
+	0x194: 0x25b02, // h6
+	0x197: 0x28304, // icon
+	0x198: 0x12607, // bgcolor
+	0x199: 0x2ad0f, // allowfullscreen
+	0x19a: 0x12004, // time
+	0x19b: 0x7803,  // rev
+	0x19d: 0x34208, // progress
+	0x19e: 0x22606, // figure
+	0x1a0: 0x6a02,  // rp
+	0x1a2: 0xa606,  // dialog
+	0x1a4: 0x2802,  // rt
+	0x1a7: 0x1e304, // area
+	0x1a8: 0x7808,  // reversed
+	0x1aa: 0x32104, // open
+	0x1ac: 0x2d204, // head
+	0x1ad: 0x7005,  // alink
+	0x1af: 0x28003, // var
+	0x1b0: 0x15f07, // details
+	0x1b1: 0x2401,  // i
+	0x1b3: 0x1e02,  // td
+	0x1b4: 0xb707,  // declare
+	0x1b5: 0x8302,  // ul
+	0x1ba: 0x2fc06, // method
+	0x1bd: 0x13007, // section
+	0x1be: 0x22a08, // required
+	0x1c2: 0x9805,  // defer
+	0x1c3: 0x37205, // vlink
+	0x1c4: 0x15405, // title
+	0x1c5: 0x2770a, // http-equiv
+	0x1c6: 0x1fa07, // enctype
+	0x1c7: 0x1ec07, // compact
+	0x1c8: 0x2d809, // maxlength
+	0x1c9: 0x16508, // selected
+	0x1cc: 0xd105,  // audio
+	0x1cd: 0xc208,  // longdesc
+	0x1d1: 0xfb04,  // cite
+	0x1da: 0x2505,  // start
+	0x1de: 0x2d102, // th
+	0x1df: 0x10808, // autoplay
+	0x1e2: 0x7104,  // link
+	0x1e3: 0x206,   // output
+	0x1e5: 0x12204, // menu
+	0x1e6: 0x2a405, // input
+	0x1eb: 0x32403, // nav
+	0x1ec: 0x31d03, // sub
+	0x1ee: 0x1807,  // charset
+	0x1ef: 0x7f07,  // default
+	0x1f3: 0x2f205, // table
+	0x1f4: 0x23b04, // form
+	0x1f5: 0x23209, // truespeed
+	0x1f6: 0x2f02,  // rb
+	0x1fb: 0x20b09, // translate
+	0x1fd: 0x2e002, // h1
+}

vendor/github.com/tdewolff/minify/v2/html/html.go

@@ -0,0 +1,511 @@
+// Package html minifies HTML5 following the specifications at http://www.w3.org/TR/html5/syntax.html.
+package html
+
+import (
+	"bytes"
+	"io"
+
+	"github.com/tdewolff/minify/v2"
+	"github.com/tdewolff/parse/v2"
+	"github.com/tdewolff/parse/v2/buffer"
+	"github.com/tdewolff/parse/v2/html"
+)
+
+var (
+	gtBytes         = []byte(">")
+	isBytes         = []byte("=")
+	spaceBytes      = []byte(" ")
+	doctypeBytes    = []byte("<!doctype html>")
+	jsMimeBytes     = []byte("application/javascript")
+	cssMimeBytes    = []byte("text/css")
+	htmlMimeBytes   = []byte("text/html")
+	svgMimeBytes    = []byte("image/svg+xml")
+	formMimeBytes   = []byte("application/x-www-form-urlencoded")
+	mathMimeBytes   = []byte("application/mathml+xml")
+	dataSchemeBytes = []byte("data:")
+	jsSchemeBytes   = []byte("javascript:")
+	httpBytes       = []byte("http")
+	radioBytes      = []byte("radio")
+	onBytes         = []byte("on")
+	textBytes       = []byte("text")
+	noneBytes       = []byte("none")
+	submitBytes     = []byte("submit")
+	allBytes        = []byte("all")
+	rectBytes       = []byte("rect")
+	dataBytes       = []byte("data")
+	getBytes        = []byte("get")
+	autoBytes       = []byte("auto")
+	oneBytes        = []byte("one")
+	inlineParams    = map[string]string{"inline": "1"}
+)
+
+////////////////////////////////////////////////////////////////
+
+// DefaultMinifier is the default minifier.
+var DefaultMinifier = &Minifier{}
+
+// Minifier is an HTML minifier.
+type Minifier struct {
+	KeepComments            bool
+	KeepConditionalComments bool
+	KeepDefaultAttrVals     bool
+	KeepDocumentTags        bool
+	KeepEndTags             bool
+	KeepQuotes              bool
+	KeepWhitespace          bool
+}
+
+// Minify minifies HTML data, it reads from r and writes to w.
+func Minify(m *minify.M, w io.Writer, r io.Reader, params map[string]string) error {
+	return DefaultMinifier.Minify(m, w, r, params)
+}
+
+// Minify minifies HTML data, it reads from r and writes to w.
+func (o *Minifier) Minify(m *minify.M, w io.Writer, r io.Reader, _ map[string]string) error {
+	var rawTagHash Hash
+	var rawTagMediatype []byte
+
+	omitSpace := true // if true the next leading space is omitted
+	inPre := false
+
+	attrMinifyBuffer := buffer.NewWriter(make([]byte, 0, 64))
+	attrByteBuffer := make([]byte, 0, 64)
+
+	z := parse.NewInput(r)
+	defer z.Restore()
+
+	l := html.NewLexer(z)
+	tb := NewTokenBuffer(z, l)
+	for {
+		t := *tb.Shift()
+		switch t.TokenType {
+		case html.ErrorToken:
+			if _, err := w.Write(nil); err != nil {
+				return err
+			}
+			if l.Err() == io.EOF {
+				return nil
+			}
+			return l.Err()
+		case html.DoctypeToken:
+			w.Write(doctypeBytes)
+		case html.CommentToken:
+			if o.KeepComments {
+				w.Write(t.Data)
+			} else if o.KeepConditionalComments && 6 < len(t.Text) && (bytes.HasPrefix(t.Text, []byte("[if ")) || bytes.HasSuffix(t.Text, []byte("[endif]")) || bytes.HasSuffix(t.Text, []byte("[endif]--"))) {
+				// [if ...] is always 7 or more characters, [endif] is only encountered for downlevel-revealed
+				// see https://msdn.microsoft.com/en-us/library/ms537512(v=vs.85).aspx#syntax
+				if bytes.HasPrefix(t.Data, []byte("<!--[if ")) && bytes.HasSuffix(t.Data, []byte("<![endif]-->")) { // downlevel-hidden
+					begin := bytes.IndexByte(t.Data, '>') + 1
+					end := len(t.Data) - len("<![endif]-->")
+					w.Write(t.Data[:begin])
+					if err := o.Minify(m, w, buffer.NewReader(t.Data[begin:end]), nil); err != nil {
+						return minify.UpdateErrorPosition(err, z, t.Offset)
+					}
+					w.Write(t.Data[end:])
+				} else {
+					w.Write(t.Data) // downlevel-revealed or short downlevel-hidden
+				}
+			} else if 1 < len(t.Text) && t.Text[0] == '#' {
+				// SSI tags
+				w.Write(t.Data)
+			}
+		case html.SvgToken:
+			if err := m.MinifyMimetype(svgMimeBytes, w, buffer.NewReader(t.Data), nil); err != nil {
+				if err != minify.ErrNotExist {
+					return minify.UpdateErrorPosition(err, z, t.Offset)
+				}
+				w.Write(t.Data)
+			}
+		case html.MathToken:
+			if err := m.MinifyMimetype(mathMimeBytes, w, buffer.NewReader(t.Data), nil); err != nil {
+				if err != minify.ErrNotExist {
+					return minify.UpdateErrorPosition(err, z, t.Offset)
+				}
+				w.Write(t.Data)
+			}
+		case html.TextToken:
+			// CSS and JS minifiers for inline code
+			if rawTagHash != 0 {
+				if rawTagHash == Style || rawTagHash == Script || rawTagHash == Iframe {
+					var mimetype []byte
+					var params map[string]string
+					if rawTagHash == Iframe {
+						mimetype = htmlMimeBytes
+					} else if len(rawTagMediatype) > 0 {
+						mimetype, params = parse.Mediatype(rawTagMediatype)
+					} else if rawTagHash == Script {
+						mimetype = jsMimeBytes
+					} else if rawTagHash == Style {
+						mimetype = cssMimeBytes
+					}
+					if err := m.MinifyMimetype(mimetype, w, buffer.NewReader(t.Data), params); err != nil {
+						if err != minify.ErrNotExist {
+							return minify.UpdateErrorPosition(err, z, t.Offset)
+						}
+						w.Write(t.Data)
+					}
+				} else {
+					w.Write(t.Data)
+				}
+			} else if inPre {
+				w.Write(t.Data)
+			} else {
+				t.Data = parse.ReplaceMultipleWhitespaceAndEntities(t.Data, EntitiesMap, TextRevEntitiesMap)
+
+				// whitespace removal; trim left
+				if omitSpace && parse.IsWhitespace(t.Data[0]) {
+					t.Data = t.Data[1:]
+				}
+
+				// whitespace removal; trim right
+				omitSpace = false
+				if len(t.Data) == 0 {
+					omitSpace = true
+				} else if parse.IsWhitespace(t.Data[len(t.Data)-1]) {
+					omitSpace = true
+					i := 0
+					for {
+						next := tb.Peek(i)
+						// trim if EOF, text token with leading whitespace or block token
+						if next.TokenType == html.ErrorToken {
+							t.Data = t.Data[:len(t.Data)-1]
+							omitSpace = false
+							break
+						} else if next.TokenType == html.TextToken {
+							// this only happens when a comment, doctype or phrasing end tag (only for !o.KeepWhitespace) was in between
+							// remove if the text token starts with a whitespace
+							if len(next.Data) > 0 && parse.IsWhitespace(next.Data[0]) {
+								t.Data = t.Data[:len(t.Data)-1]
+								omitSpace = false
+							}
+							break
+						} else if next.TokenType == html.StartTagToken || next.TokenType == html.EndTagToken {
+							if o.KeepWhitespace {
+								break
+							}
+							// remove when followed up by a block tag
+							if next.Traits&nonPhrasingTag != 0 {
+								t.Data = t.Data[:len(t.Data)-1]
+								omitSpace = false
+								break
+							} else if next.TokenType == html.StartTagToken {
+								break
+							}
+						}
+						i++
+					}
+				}
+
+				w.Write(t.Data)
+			}
+		case html.StartTagToken, html.EndTagToken:
+			rawTagHash = 0
+			hasAttributes := false
+			if t.TokenType == html.StartTagToken {
+				if next := tb.Peek(0); next.TokenType == html.AttributeToken {
+					hasAttributes = true
+				}
+				if t.Traits&rawTag != 0 {
+					// ignore empty script and style tags
+					if !hasAttributes && (t.Hash == Script || t.Hash == Style) {
+						if next := tb.Peek(1); next.TokenType == html.EndTagToken {
+							tb.Shift()
+							tb.Shift()
+							break
+						}
+					}
+					rawTagHash = t.Hash
+					rawTagMediatype = nil
+
+					// do not minify content of <style amp-boilerplate>
+					if hasAttributes && t.Hash == Style {
+						if attrs := tb.Attributes(Amp_Boilerplate); attrs[0] != nil {
+							rawTagHash = 0
+						}
+					}
+				}
+			} else if t.Hash == Template {
+				omitSpace = true // EndTagToken
+			}
+
+			if t.Hash == Pre {
+				inPre = t.TokenType == html.StartTagToken
+			}
+
+			// remove superfluous tags, except for html, head and body tags when KeepDocumentTags is set
+			if !hasAttributes && (!o.KeepDocumentTags && (t.Hash == Html || t.Hash == Head || t.Hash == Body) || t.Hash == Colgroup) {
+				break
+			} else if t.TokenType == html.EndTagToken {
+				omitEndTag := false
+				if !o.KeepEndTags {
+					if t.Hash == Thead || t.Hash == Tbody || t.Hash == Tfoot || t.Hash == Tr || t.Hash == Th ||
+						t.Hash == Td || t.Hash == Option || t.Hash == Dd || t.Hash == Dt || t.Hash == Li ||
+						t.Hash == Rb || t.Hash == Rt || t.Hash == Rtc || t.Hash == Rp {
+						omitEndTag = true // omit end tags
+					} else if t.Hash == P {
+						i := 0
+						for {
+							next := tb.Peek(i)
+							i++
+							// continue if text token is empty or whitespace
+							if next.TokenType == html.TextToken && parse.IsAllWhitespace(next.Data) {
+								continue
+							}
+							if next.TokenType == html.ErrorToken || next.TokenType == html.EndTagToken && next.Traits&keepPTag == 0 || next.TokenType == html.StartTagToken && next.Traits&omitPTag != 0 {
+								omitEndTag = true // omit p end tag
+							}
+							break
+						}
+					} else if t.Hash == Optgroup {
+						i := 0
+						for {
+							next := tb.Peek(i)
+							i++
+							// continue if text token
+							if next.TokenType == html.TextToken {
+								continue
+							}
+							if next.TokenType == html.ErrorToken || next.Hash != Option {
+								omitEndTag = true // omit optgroup end tag
+							}
+							break
+						}
+					}
+				}
+
+				if o.KeepWhitespace || t.Traits&objectTag != 0 {
+					omitSpace = false
+				} else if t.Traits&nonPhrasingTag != 0 {
+					omitSpace = true // omit spaces after block elements
+				}
+
+				if !omitEndTag {
+					if len(t.Data) > 3+len(t.Text) {
+						t.Data[2+len(t.Text)] = '>'
+						t.Data = t.Data[:3+len(t.Text)]
+					}
+					w.Write(t.Data)
+				}
+
+				// skip text in select and optgroup tags
+				if t.Hash == Option || t.Hash == Optgroup {
+					if next := tb.Peek(0); next.TokenType == html.TextToken {
+						tb.Shift()
+					}
+				}
+				break
+			}
+
+			if o.KeepWhitespace || t.Traits&objectTag != 0 {
+				omitSpace = false
+			} else if t.Traits&nonPhrasingTag != 0 {
+				omitSpace = true // omit spaces after block elements
+			}
+
+			w.Write(t.Data)
+
+			if hasAttributes {
+				if t.Hash == Meta {
+					attrs := tb.Attributes(Content, Http_Equiv, Charset, Name)
+					if content := attrs[0]; content != nil {
+						if httpEquiv := attrs[1]; httpEquiv != nil {
+							httpEquiv.AttrVal = parse.TrimWhitespace(httpEquiv.AttrVal)
+							if charset := attrs[2]; charset == nil && parse.EqualFold(httpEquiv.AttrVal, []byte("content-type")) {
+								content.AttrVal = minify.Mediatype(content.AttrVal)
+								if bytes.Equal(content.AttrVal, []byte("text/html;charset=utf-8")) {
+									httpEquiv.Text = nil
+									content.Text = []byte("charset")
+									content.Hash = Charset
+									content.AttrVal = []byte("utf-8")
+								}
+							}
+						}
+						if name := attrs[3]; name != nil {
+							name.AttrVal = parse.TrimWhitespace(name.AttrVal)
+							if parse.EqualFold(name.AttrVal, []byte("keywords")) {
+								content.AttrVal = bytes.ReplaceAll(content.AttrVal, []byte(", "), []byte(","))
+							} else if parse.EqualFold(name.AttrVal, []byte("viewport")) {
+								content.AttrVal = bytes.ReplaceAll(content.AttrVal, []byte(" "), []byte(""))
+								for i := 0; i < len(content.AttrVal); i++ {
+									if content.AttrVal[i] == '=' && i+2 < len(content.AttrVal) {
+										i++
+										if n := parse.Number(content.AttrVal[i:]); n > 0 {
+											minNum := minify.Number(content.AttrVal[i:i+n], -1)
+											if len(minNum) < n {
+												copy(content.AttrVal[i:i+len(minNum)], minNum)
+												copy(content.AttrVal[i+len(minNum):], content.AttrVal[i+n:])
+												content.AttrVal = content.AttrVal[:len(content.AttrVal)+len(minNum)-n]
+											}
+											i += len(minNum)
+										}
+										i-- // mitigate for-loop increase
+									}
+								}
+							}
+						}
+					}
+				} else if t.Hash == Script {
+					attrs := tb.Attributes(Src, Charset)
+					if attrs[0] != nil && attrs[1] != nil {
+						attrs[1].Text = nil
+					}
+				} else if t.Hash == Input {
+					attrs := tb.Attributes(Type, Value)
+					if t, value := attrs[0], attrs[1]; t != nil && value != nil {
+						isRadio := parse.EqualFold(t.AttrVal, radioBytes)
+						if !isRadio && len(value.AttrVal) == 0 {
+							value.Text = nil
+						} else if isRadio && parse.EqualFold(value.AttrVal, onBytes) {
+							value.Text = nil
+						}
+					}
+				} else if t.Hash == A {
+					attrs := tb.Attributes(Id, Name)
+					if id, name := attrs[0], attrs[1]; id != nil && name != nil {
+						if bytes.Equal(id.AttrVal, name.AttrVal) {
+							name.Text = nil
+						}
+					}
+				}
+
+				// write attributes
+				for {
+					attr := *tb.Shift()
+					if attr.TokenType != html.AttributeToken {
+						break
+					} else if attr.Text == nil {
+						continue // removed attribute
+					}
+
+					val := attr.AttrVal
+					if attr.Traits&trimAttr != 0 {
+						val = parse.ReplaceMultipleWhitespaceAndEntities(val, EntitiesMap, nil)
+						val = parse.TrimWhitespace(val)
+					} else {
+						val = parse.ReplaceEntities(val, EntitiesMap, nil)
+					}
+					if t.Traits != 0 {
+						if len(val) == 0 && (attr.Hash == Class ||
+							attr.Hash == Dir ||
+							attr.Hash == Id ||
+							attr.Hash == Name ||
+							attr.Hash == Action && t.Hash == Form) {
+							continue // omit empty attribute values
+						}
+						if attr.Traits&caselessAttr != 0 {
+							val = parse.ToLower(val)
+							if attr.Hash == Enctype || attr.Hash == Codetype || attr.Hash == Accept || attr.Hash == Type && (t.Hash == A || t.Hash == Link || t.Hash == Embed || t.Hash == Object || t.Hash == Source || t.Hash == Script || t.Hash == Style) {
+								val = minify.Mediatype(val)
+							}
+						}
+						if rawTagHash != 0 && attr.Hash == Type {
+							rawTagMediatype = parse.Copy(val)
+						}
+
+						// default attribute values can be omitted
+						if !o.KeepDefaultAttrVals && (attr.Hash == Type && (t.Hash == Script && jsMimetypes[string(val)] ||
+							t.Hash == Style && bytes.Equal(val, cssMimeBytes) ||
+							t.Hash == Link && bytes.Equal(val, cssMimeBytes) ||
+							t.Hash == Input && bytes.Equal(val, textBytes) ||
+							t.Hash == Button && bytes.Equal(val, submitBytes)) ||
+							attr.Hash == Language && t.Hash == Script ||
+							attr.Hash == Method && bytes.Equal(val, getBytes) ||
+							attr.Hash == Enctype && bytes.Equal(val, formMimeBytes) ||
+							attr.Hash == Colspan && bytes.Equal(val, oneBytes) ||
+							attr.Hash == Rowspan && bytes.Equal(val, oneBytes) ||
+							attr.Hash == Shape && bytes.Equal(val, rectBytes) ||
+							attr.Hash == Span && bytes.Equal(val, oneBytes) ||
+							attr.Hash == Clear && bytes.Equal(val, noneBytes) ||
+							attr.Hash == Frameborder && bytes.Equal(val, oneBytes) ||
+							attr.Hash == Scrolling && bytes.Equal(val, autoBytes) ||
+							attr.Hash == Valuetype && bytes.Equal(val, dataBytes) ||
+							attr.Hash == Media && t.Hash == Style && bytes.Equal(val, allBytes)) {
+							continue
+						}
+
+						if attr.Hash == Style {
+							// CSS minifier for attribute inline code
+							val = parse.TrimWhitespace(val)
+							attrMinifyBuffer.Reset()
+							if err := m.MinifyMimetype(cssMimeBytes, attrMinifyBuffer, buffer.NewReader(val), inlineParams); err == nil {
+								val = attrMinifyBuffer.Bytes()
+							} else if err != minify.ErrNotExist {
+								return minify.UpdateErrorPosition(err, z, attr.Offset)
+							}
+							if len(val) == 0 {
+								continue
+							}
+						} else if len(attr.Text) > 2 && attr.Text[0] == 'o' && attr.Text[1] == 'n' {
+							// JS minifier for attribute inline code
+							val = parse.TrimWhitespace(val)
+							if len(val) >= 11 && parse.EqualFold(val[:11], jsSchemeBytes) {
+								val = val[11:]
+							}
+							attrMinifyBuffer.Reset()
+							if err := m.MinifyMimetype(jsMimeBytes, attrMinifyBuffer, buffer.NewReader(val), nil); err == nil {
+								val = attrMinifyBuffer.Bytes()
+							} else if err != minify.ErrNotExist {
+								return minify.UpdateErrorPosition(err, z, attr.Offset)
+							}
+							if len(val) == 0 {
+								continue
+							}
+						} else if attr.Traits&urlAttr != 0 { // anchors are already handled
+							val = parse.TrimWhitespace(val)
+							if 5 < len(val) {
+								if parse.EqualFold(val[:4], httpBytes) {
+									if val[4] == ':' {
+										if m.URL != nil && m.URL.Scheme == "http" {
+											val = val[5:]
+										} else {
+											parse.ToLower(val[:4])
+										}
+									} else if (val[4] == 's' || val[4] == 'S') && val[5] == ':' {
+										if m.URL != nil && m.URL.Scheme == "https" {
+											val = val[6:]
+										} else {
+											parse.ToLower(val[:5])
+										}
+									}
+								} else if parse.EqualFold(val[:5], dataSchemeBytes) {
+									val = minify.DataURI(m, val)
+								}
+							}
+						}
+					}
+
+					w.Write(spaceBytes)
+					w.Write(attr.Text)
+					if len(val) > 0 && attr.Traits&booleanAttr == 0 {
+						w.Write(isBytes)
+
+						// use double quotes for RDFa attributes
+						isXML := attr.Hash == Vocab || attr.Hash == Typeof || attr.Hash == Property || attr.Hash == Resource || attr.Hash == Prefix || attr.Hash == Content || attr.Hash == About || attr.Hash == Rev || attr.Hash == Datatype || attr.Hash == Inlist
+
+						// no quotes if possible, else prefer single or double depending on which occurs more often in value
+						val = html.EscapeAttrVal(&attrByteBuffer, attr.AttrVal, val, o.KeepQuotes || isXML)
+						w.Write(val)
+					}
+				}
+			} else {
+				_ = tb.Shift() // StartTagClose
+			}
+			w.Write(gtBytes)
+
+			// skip text in select and optgroup tags
+			if t.Hash == Select || t.Hash == Optgroup {
+				if next := tb.Peek(0); next.TokenType == html.TextToken {
+					tb.Shift()
+				}
+			}
+
+			// keep space after phrasing tags (<i>, <span>, ...) FontAwesome etc.
+			if t.TokenType == html.StartTagToken && t.Traits&nonPhrasingTag == 0 {
+				if next := tb.Peek(0); next.Hash == t.Hash && next.TokenType == html.EndTagToken {
+					omitSpace = false
+				}
+			}
+		}
+	}
+}

vendor/github.com/tdewolff/minify/v2/minify.go

@@ -0,0 +1,345 @@
+// Package minify relates MIME type to minifiers. Several minifiers are provided in the subpackages.
+package minify
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"mime"
+	"net/http"
+	"net/url"
+	"os"
+	"os/exec"
+	"path"
+	"regexp"
+	"strings"
+	"sync"
+
+	"github.com/tdewolff/parse/v2"
+	"github.com/tdewolff/parse/v2/buffer"
+)
+
+// Warning is used to report usage warnings such as using a deprecated feature
+var Warning = log.New(os.Stderr, "WARNING: ", 0)
+
+// ErrNotExist is returned when no minifier exists for a given mimetype.
+var ErrNotExist = errors.New("minifier does not exist for mimetype")
+
+////////////////////////////////////////////////////////////////
+
+// MinifierFunc is a function that implements Minifer.
+type MinifierFunc func(*M, io.Writer, io.Reader, map[string]string) error
+
+// Minify calls f(m, w, r, params)
+func (f MinifierFunc) Minify(m *M, w io.Writer, r io.Reader, params map[string]string) error {
+	return f(m, w, r, params)
+}
+
+// Minifier is the interface for minifiers.
+// The *M parameter is used for minifying embedded resources, such as JS within HTML.
+type Minifier interface {
+	Minify(*M, io.Writer, io.Reader, map[string]string) error
+}
+
+////////////////////////////////////////////////////////////////
+
+type patternMinifier struct {
+	pattern *regexp.Regexp
+	Minifier
+}
+
+type cmdMinifier struct {
+	cmd *exec.Cmd
+}
+
+var cmdArgExtension = regexp.MustCompile(`^\.[0-9a-zA-Z]+`)
+
+func (c *cmdMinifier) Minify(_ *M, w io.Writer, r io.Reader, _ map[string]string) error {
+	cmd := &exec.Cmd{}
+	*cmd = *c.cmd // concurrency safety
+
+	var in, out *os.File
+	for i, arg := range cmd.Args {
+		if j := strings.Index(arg, "$in"); j != -1 {
+			var err error
+			ext := cmdArgExtension.FindString(arg[j+3:])
+			if in, err = ioutil.TempFile("", "minify-in-*"+ext); err != nil {
+				return err
+			}
+			cmd.Args[i] = arg[:j] + in.Name() + arg[j+3+len(ext):]
+		} else if j := strings.Index(arg, "$out"); j != -1 {
+			var err error
+			ext := cmdArgExtension.FindString(arg[j+4:])
+			if out, err = ioutil.TempFile("", "minify-out-*"+ext); err != nil {
+				return err
+			}
+			cmd.Args[i] = arg[:j] + out.Name() + arg[j+4+len(ext):]
+		}
+	}
+
+	if in == nil {
+		cmd.Stdin = r
+	} else if _, err := io.Copy(in, r); err != nil {
+		return err
+	}
+	if out == nil {
+		cmd.Stdout = w
+	} else {
+		defer io.Copy(w, out)
+	}
+	stderr := &bytes.Buffer{}
+	cmd.Stderr = stderr
+
+	err := cmd.Run()
+	if _, ok := err.(*exec.ExitError); ok {
+		if stderr.Len() != 0 {
+			err = fmt.Errorf("%s", stderr.String())
+		}
+		err = fmt.Errorf("command %s failed: %w", cmd.Path, err)
+	}
+	return err
+}
+
+////////////////////////////////////////////////////////////////
+
+// M holds a map of mimetype => function to allow recursive minifier calls of the minifier functions.
+type M struct {
+	mutex   sync.RWMutex
+	literal map[string]Minifier
+	pattern []patternMinifier
+
+	URL *url.URL
+}
+
+// New returns a new M.
+func New() *M {
+	return &M{
+		sync.RWMutex{},
+		map[string]Minifier{},
+		[]patternMinifier{},
+		nil,
+	}
+}
+
+// Add adds a minifier to the mimetype => function map (unsafe for concurrent use).
+func (m *M) Add(mimetype string, minifier Minifier) {
+	m.mutex.Lock()
+	m.literal[mimetype] = minifier
+	m.mutex.Unlock()
+}
+
+// AddFunc adds a minify function to the mimetype => function map (unsafe for concurrent use).
+func (m *M) AddFunc(mimetype string, minifier MinifierFunc) {
+	m.mutex.Lock()
+	m.literal[mimetype] = minifier
+	m.mutex.Unlock()
+}
+
+// AddRegexp adds a minifier to the mimetype => function map (unsafe for concurrent use).
+func (m *M) AddRegexp(pattern *regexp.Regexp, minifier Minifier) {
+	m.mutex.Lock()
+	m.pattern = append(m.pattern, patternMinifier{pattern, minifier})
+	m.mutex.Unlock()
+}
+
+// AddFuncRegexp adds a minify function to the mimetype => function map (unsafe for concurrent use).
+func (m *M) AddFuncRegexp(pattern *regexp.Regexp, minifier MinifierFunc) {
+	m.mutex.Lock()
+	m.pattern = append(m.pattern, patternMinifier{pattern, minifier})
+	m.mutex.Unlock()
+}
+
+// AddCmd adds a minify function to the mimetype => function map (unsafe for concurrent use) that executes a command to process the minification.
+// It allows the use of external tools like ClosureCompiler, UglifyCSS, etc. for a specific mimetype.
+func (m *M) AddCmd(mimetype string, cmd *exec.Cmd) {
+	m.mutex.Lock()
+	m.literal[mimetype] = &cmdMinifier{cmd}
+	m.mutex.Unlock()
+}
+
+// AddCmdRegexp adds a minify function to the mimetype => function map (unsafe for concurrent use) that executes a command to process the minification.
+// It allows the use of external tools like ClosureCompiler, UglifyCSS, etc. for a specific mimetype regular expression.
+func (m *M) AddCmdRegexp(pattern *regexp.Regexp, cmd *exec.Cmd) {
+	m.mutex.Lock()
+	m.pattern = append(m.pattern, patternMinifier{pattern, &cmdMinifier{cmd}})
+	m.mutex.Unlock()
+}
+
+// Match returns the pattern and minifier that gets matched with the mediatype.
+// It returns nil when no matching minifier exists.
+// It has the same matching algorithm as Minify.
+func (m *M) Match(mediatype string) (string, map[string]string, MinifierFunc) {
+	m.mutex.RLock()
+	defer m.mutex.RUnlock()
+
+	mimetype, params := parse.Mediatype([]byte(mediatype))
+	if minifier, ok := m.literal[string(mimetype)]; ok { // string conversion is optimized away
+		return string(mimetype), params, minifier.Minify
+	}
+
+	for _, minifier := range m.pattern {
+		if minifier.pattern.Match(mimetype) {
+			return minifier.pattern.String(), params, minifier.Minify
+		}
+	}
+	return string(mimetype), params, nil
+}
+
+// Minify minifies the content of a Reader and writes it to a Writer (safe for concurrent use).
+// An error is returned when no such mimetype exists (ErrNotExist) or when an error occurred in the minifier function.
+// Mediatype may take the form of 'text/plain', 'text/*', '*/*' or 'text/plain; charset=UTF-8; version=2.0'.
+func (m *M) Minify(mediatype string, w io.Writer, r io.Reader) error {
+	mimetype, params := parse.Mediatype([]byte(mediatype))
+	return m.MinifyMimetype(mimetype, w, r, params)
+}
+
+// MinifyMimetype minifies the content of a Reader and writes it to a Writer (safe for concurrent use).
+// It is a lower level version of Minify and requires the mediatype to be split up into mimetype and parameters.
+// It is mostly used internally by minifiers because it is faster (no need to convert a byte-slice to string and vice versa).
+func (m *M) MinifyMimetype(mimetype []byte, w io.Writer, r io.Reader, params map[string]string) error {
+	m.mutex.RLock()
+	defer m.mutex.RUnlock()
+
+	if minifier, ok := m.literal[string(mimetype)]; ok { // string conversion is optimized away
+		return minifier.Minify(m, w, r, params)
+	}
+	for _, minifier := range m.pattern {
+		if minifier.pattern.Match(mimetype) {
+			return minifier.Minify(m, w, r, params)
+		}
+	}
+	return ErrNotExist
+}
+
+// Bytes minifies an array of bytes (safe for concurrent use). When an error occurs it return the original array and the error.
+// It returns an error when no such mimetype exists (ErrNotExist) or any error occurred in the minifier function.
+func (m *M) Bytes(mediatype string, v []byte) ([]byte, error) {
+	out := buffer.NewWriter(make([]byte, 0, len(v)))
+	if err := m.Minify(mediatype, out, buffer.NewReader(v)); err != nil {
+		return v, err
+	}
+	return out.Bytes(), nil
+}
+
+// String minifies a string (safe for concurrent use). When an error occurs it return the original string and the error.
+// It returns an error when no such mimetype exists (ErrNotExist) or any error occurred in the minifier function.
+func (m *M) String(mediatype string, v string) (string, error) {
+	out := buffer.NewWriter(make([]byte, 0, len(v)))
+	if err := m.Minify(mediatype, out, buffer.NewReader([]byte(v))); err != nil {
+		return v, err
+	}
+	return string(out.Bytes()), nil
+}
+
+// Reader wraps a Reader interface and minifies the stream.
+// Errors from the minifier are returned by the reader.
+func (m *M) Reader(mediatype string, r io.Reader) io.Reader {
+	pr, pw := io.Pipe()
+	go func() {
+		if err := m.Minify(mediatype, pw, r); err != nil {
+			pw.CloseWithError(err)
+		} else {
+			pw.Close()
+		}
+	}()
+	return pr
+}
+
+// minifyWriter makes sure that errors from the minifier are passed down through Close (can be blocking).
+type minifyWriter struct {
+	pw  *io.PipeWriter
+	wg  sync.WaitGroup
+	err error
+}
+
+// Write intercepts any writes to the writer.
+func (w *minifyWriter) Write(b []byte) (int, error) {
+	return w.pw.Write(b)
+}
+
+// Close must be called when writing has finished. It returns the error from the minifier.
+func (w *minifyWriter) Close() error {
+	w.pw.Close()
+	w.wg.Wait()
+	return w.err
+}
+
+// Writer wraps a Writer interface and minifies the stream.
+// Errors from the minifier are returned by Close on the writer.
+// The writer must be closed explicitly.
+func (m *M) Writer(mediatype string, w io.Writer) *minifyWriter {
+	pr, pw := io.Pipe()
+	mw := &minifyWriter{pw, sync.WaitGroup{}, nil}
+	mw.wg.Add(1)
+	go func() {
+		defer mw.wg.Done()
+
+		if err := m.Minify(mediatype, w, pr); err != nil {
+			io.Copy(w, pr)
+			mw.err = err
+		}
+		pr.Close()
+	}()
+	return mw
+}
+
+// minifyResponseWriter wraps an http.ResponseWriter and makes sure that errors from the minifier are passed down through Close (can be blocking).
+// All writes to the response writer are intercepted and minified on the fly.
+// http.ResponseWriter loses all functionality such as Pusher, Hijacker, Flusher, ...
+type minifyResponseWriter struct {
+	http.ResponseWriter
+
+	writer    *minifyWriter
+	m         *M
+	mediatype string
+}
+
+// WriteHeader intercepts any header writes and removes the Content-Length header.
+func (w *minifyResponseWriter) WriteHeader(status int) {
+	w.ResponseWriter.Header().Del("Content-Length")
+	w.ResponseWriter.WriteHeader(status)
+}
+
+// Write intercepts any writes to the response writer.
+// The first write will extract the Content-Type as the mediatype. Otherwise it falls back to the RequestURI extension.
+func (w *minifyResponseWriter) Write(b []byte) (int, error) {
+	if w.writer == nil {
+		// first write
+		if mediatype := w.ResponseWriter.Header().Get("Content-Type"); mediatype != "" {
+			w.mediatype = mediatype
+		}
+		w.writer = w.m.Writer(w.mediatype, w.ResponseWriter)
+	}
+	return w.writer.Write(b)
+}
+
+// Close must be called when writing has finished. It returns the error from the minifier.
+func (w *minifyResponseWriter) Close() error {
+	if w.writer != nil {
+		return w.writer.Close()
+	}
+	return nil
+}
+
+// ResponseWriter minifies any writes to the http.ResponseWriter.
+// http.ResponseWriter loses all functionality such as Pusher, Hijacker, Flusher, ...
+// Minification might be slower than just sending the original file! Caching is advised.
+func (m *M) ResponseWriter(w http.ResponseWriter, r *http.Request) *minifyResponseWriter {
+	mediatype := mime.TypeByExtension(path.Ext(r.RequestURI))
+	return &minifyResponseWriter{w, nil, m, mediatype}
+}
+
+// Middleware provides a middleware function that minifies content on the fly by intercepting writes to http.ResponseWriter.
+// http.ResponseWriter loses all functionality such as Pusher, Hijacker, Flusher, ...
+// Minification might be slower than just sending the original file! Caching is advised.
+func (m *M) Middleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		mw := m.ResponseWriter(w, r)
+		defer mw.Close()
+
+		next.ServeHTTP(mw, r)
+	})
+}

vendor/github.com/tdewolff/parse/v2/.gitattributes

@@ -0,0 +1 @@
+tests/*/corpus/* linguist-generated

vendor/github.com/tdewolff/parse/v2/.gitignore

@@ -0,0 +1,5 @@
+tests/*/fuzz-fuzz.zip
+tests/*/crashers
+tests/*/suppressions
+tests/*/corpus/*
+!tests/*/corpus/*.*

vendor/github.com/tdewolff/parse/v2/.golangci.yml

@@ -0,0 +1,16 @@
+linters:
+  enable:
+  - depguard
+  - dogsled
+  - gofmt
+  - goimports
+  - golint
+  - gosec
+  - govet
+  - megacheck
+  - misspell
+  - nakedret
+  - prealloc
+  - unconvert
+  - unparam
+  - wastedassign

vendor/github.com/tdewolff/parse/v2/LICENSE.md

@@ -0,0 +1,22 @@
+Copyright (c) 2015 Taco de Wolff
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation
+ files (the "Software"), to deal in the Software without
+ restriction, including without limitation the rights to use,
+ copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the
+ Software is furnished to do so, subject to the following
+ conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/tdewolff/parse/v2/README.md

@@ -0,0 +1,64 @@
+# Parse [![API reference](https://img.shields.io/badge/godoc-reference-5272B4)](https://pkg.go.dev/github.com/tdewolff/parse/v2?tab=doc) [![Go Report Card](https://goreportcard.com/badge/github.com/tdewolff/parse)](https://goreportcard.com/report/github.com/tdewolff/parse) [![Coverage Status](https://coveralls.io/repos/github/tdewolff/parse/badge.svg?branch=master)](https://coveralls.io/github/tdewolff/parse?branch=master) [![Donate](https://img.shields.io/badge/patreon-donate-DFB317)](https://www.patreon.com/tdewolff)
+
+This package contains several lexers and parsers written in [Go][1]. All subpackages are built to be streaming, high performance and to be in accordance with the official (latest) specifications.
+
+The lexers are implemented using `buffer.Lexer` in https://github.com/tdewolff/parse/buffer and the parsers work on top of the lexers. Some subpackages have hashes defined (using [Hasher](https://github.com/tdewolff/hasher)) that speed up common byte-slice comparisons.
+
+## Buffer
+### Reader
+Reader is a wrapper around a `[]byte` that implements the `io.Reader` interface. It is comparable to `bytes.Reader` but has slightly different semantics (and a slightly smaller memory footprint).
+
+### Writer
+Writer is a buffer that implements the `io.Writer` interface and expands the buffer as needed. The reset functionality allows for better memory reuse. After calling `Reset`, it will overwrite the current buffer and thus reduce allocations.
+
+### Lexer
+Lexer is a read buffer specifically designed for building lexers. It keeps track of two positions: a start and end position. The start position is the beginning of the current token being parsed, the end position is being moved forward until a valid token is found. Calling `Shift` will collapse the positions to the end and return the parsed `[]byte`.
+
+Moving the end position can go through `Move(int)` which also accepts negative integers. One can also use `Pos() int` to try and parse a token, and if it fails rewind with `Rewind(int)`, passing the previously saved position.
+
+`Peek(int) byte` will peek forward (relative to the end position) and return the byte at that location. `PeekRune(int) (rune, int)` returns UTF-8 runes and its length at the given **byte** position. Upon an error `Peek` will return `0`, the **user must peek at every character** and not skip any, otherwise it may skip a `0` and panic on out-of-bounds indexing.
+
+`Lexeme() []byte` will return the currently selected bytes, `Skip()` will collapse the selection. `Shift() []byte` is a combination of `Lexeme() []byte` and `Skip()`.
+
+When the passed `io.Reader` returned an error, `Err() error` will return that error even if not at the end of the buffer.
+
+### StreamLexer
+StreamLexer behaves like Lexer but uses a buffer pool to read in chunks from `io.Reader`, retaining old buffers in memory that are still in use, and re-using old buffers otherwise. Calling `Free(n int)` frees up `n` bytes from the internal buffer(s). It holds an array of buffers to accommodate for keeping everything in-memory. Calling `ShiftLen() int` returns the number of bytes that have been shifted since the previous call to `ShiftLen`, which can be used to specify how many bytes need to be freed up from the buffer. If you don't need to keep returned byte slices around, call `Free(ShiftLen())` after every `Shift` call.
+
+## Strconv
+This package contains string conversion function much like the standard library's `strconv` package, but it is specifically tailored for the performance needs within the `minify` package.
+
+For example, the floating-point to string conversion function is approximately twice as fast as the standard library, but it is not as precise.
+
+## CSS
+This package is a CSS3 lexer and parser. Both follow the specification at [CSS Syntax Module Level 3](http://www.w3.org/TR/css-syntax-3/). The lexer takes an io.Reader and converts it into tokens until the EOF. The parser returns a parse tree of the full io.Reader input stream, but the low-level `Next` function can be used for stream parsing to returns grammar units until the EOF.
+
+[See README here](https://github.com/tdewolff/parse/tree/master/css).
+
+## HTML
+This package is an HTML5 lexer. It follows the specification at [The HTML syntax](http://www.w3.org/TR/html5/syntax.html). The lexer takes an io.Reader and converts it into tokens until the EOF.
+
+[See README here](https://github.com/tdewolff/parse/tree/master/html).
+
+## JS
+This package is a JS lexer (ECMA-262, edition 6.0). It follows the specification at [ECMAScript Language Specification](http://www.ecma-international.org/ecma-262/6.0/). The lexer takes an io.Reader and converts it into tokens until the EOF.
+
+[See README here](https://github.com/tdewolff/parse/tree/master/js).
+
+## JSON
+This package is a JSON parser (ECMA-404). It follows the specification at [JSON](http://json.org/). The parser takes an io.Reader and converts it into tokens until the EOF.
+
+[See README here](https://github.com/tdewolff/parse/tree/master/json).
+
+## SVG
+This package contains common hashes for SVG1.1 tags and attributes.
+
+## XML
+This package is an XML1.0 lexer. It follows the specification at [Extensible Markup Language (XML) 1.0 (Fifth Edition)](http://www.w3.org/TR/xml/). The lexer takes an io.Reader and converts it into tokens until the EOF.
+
+[See README here](https://github.com/tdewolff/parse/tree/master/xml).
+
+## License
+Released under the [MIT license](LICENSE.md).
+
+[1]: http://golang.org/ "Go Language"

vendor/github.com/tdewolff/parse/v2/buffer/buffer.go

@@ -0,0 +1,12 @@
+// Package buffer contains buffer and wrapper types for byte slices. It is useful for writing lexers or other high-performance byte slice handling.
+// The `Reader` and `Writer` types implement the `io.Reader` and `io.Writer` respectively and provide a thinner and faster interface than `bytes.Buffer`.
+// The `Lexer` type is useful for building lexers because it keeps track of the start and end position of a byte selection, and shifts the bytes whenever a valid token is found.
+// The `StreamLexer` does the same, but keeps a buffer pool so that it reads a limited amount at a time, allowing to parse from streaming sources.
+package buffer
+
+// defaultBufSize specifies the default initial length of internal buffers.
+var defaultBufSize = 4096
+
+// MinBuf specifies the default initial length of internal buffers.
+// Solely here to support old versions of parse.
+var MinBuf = defaultBufSize

vendor/github.com/tdewolff/parse/v2/buffer/lexer.go

@@ -0,0 +1,164 @@
+package buffer
+
+import (
+	"io"
+	"io/ioutil"
+)
+
+var nullBuffer = []byte{0}
+
+// Lexer is a buffered reader that allows peeking forward and shifting, taking an io.Reader.
+// It keeps data in-memory until Free, taking a byte length, is called to move beyond the data.
+type Lexer struct {
+	buf   []byte
+	pos   int // index in buf
+	start int // index in buf
+	err   error
+
+	restore func()
+}
+
+// NewLexer returns a new Lexer for a given io.Reader, and uses ioutil.ReadAll to read it into a byte slice.
+// If the io.Reader implements Bytes, that is used instead.
+// It will append a NULL at the end of the buffer.
+func NewLexer(r io.Reader) *Lexer {
+	var b []byte
+	if r != nil {
+		if buffer, ok := r.(interface {
+			Bytes() []byte
+		}); ok {
+			b = buffer.Bytes()
+		} else {
+			var err error
+			b, err = ioutil.ReadAll(r)
+			if err != nil {
+				return &Lexer{
+					buf: nullBuffer,
+					err: err,
+				}
+			}
+		}
+	}
+	return NewLexerBytes(b)
+}
+
+// NewLexerBytes returns a new Lexer for a given byte slice, and appends NULL at the end.
+// To avoid reallocation, make sure the capacity has room for one more byte.
+func NewLexerBytes(b []byte) *Lexer {
+	z := &Lexer{
+		buf: b,
+	}
+
+	n := len(b)
+	if n == 0 {
+		z.buf = nullBuffer
+	} else {
+		// Append NULL to buffer, but try to avoid reallocation
+		if cap(b) > n {
+			// Overwrite next byte but restore when done
+			b = b[:n+1]
+			c := b[n]
+			b[n] = 0
+
+			z.buf = b
+			z.restore = func() {
+				b[n] = c
+			}
+		} else {
+			z.buf = append(b, 0)
+		}
+	}
+	return z
+}
+
+// Restore restores the replaced byte past the end of the buffer by NULL.
+func (z *Lexer) Restore() {
+	if z.restore != nil {
+		z.restore()
+		z.restore = nil
+	}
+}
+
+// Err returns the error returned from io.Reader or io.EOF when the end has been reached.
+func (z *Lexer) Err() error {
+	return z.PeekErr(0)
+}
+
+// PeekErr returns the error at position pos. When pos is zero, this is the same as calling Err().
+func (z *Lexer) PeekErr(pos int) error {
+	if z.err != nil {
+		return z.err
+	} else if z.pos+pos >= len(z.buf)-1 {
+		return io.EOF
+	}
+	return nil
+}
+
+// Peek returns the ith byte relative to the end position.
+// Peek returns 0 when an error has occurred, Err returns the error.
+func (z *Lexer) Peek(pos int) byte {
+	pos += z.pos
+	return z.buf[pos]
+}
+
+// PeekRune returns the rune and rune length of the ith byte relative to the end position.
+func (z *Lexer) PeekRune(pos int) (rune, int) {
+	// from unicode/utf8
+	c := z.Peek(pos)
+	if c < 0xC0 || z.Peek(pos+1) == 0 {
+		return rune(c), 1
+	} else if c < 0xE0 || z.Peek(pos+2) == 0 {
+		return rune(c&0x1F)<<6 | rune(z.Peek(pos+1)&0x3F), 2
+	} else if c < 0xF0 || z.Peek(pos+3) == 0 {
+		return rune(c&0x0F)<<12 | rune(z.Peek(pos+1)&0x3F)<<6 | rune(z.Peek(pos+2)&0x3F), 3
+	}
+	return rune(c&0x07)<<18 | rune(z.Peek(pos+1)&0x3F)<<12 | rune(z.Peek(pos+2)&0x3F)<<6 | rune(z.Peek(pos+3)&0x3F), 4
+}
+
+// Move advances the position.
+func (z *Lexer) Move(n int) {
+	z.pos += n
+}
+
+// Pos returns a mark to which can be rewinded.
+func (z *Lexer) Pos() int {
+	return z.pos - z.start
+}
+
+// Rewind rewinds the position to the given position.
+func (z *Lexer) Rewind(pos int) {
+	z.pos = z.start + pos
+}
+
+// Lexeme returns the bytes of the current selection.
+func (z *Lexer) Lexeme() []byte {
+	return z.buf[z.start:z.pos:z.pos]
+}
+
+// Skip collapses the position to the end of the selection.
+func (z *Lexer) Skip() {
+	z.start = z.pos
+}
+
+// Shift returns the bytes of the current selection and collapses the position to the end of the selection.
+func (z *Lexer) Shift() []byte {
+	b := z.buf[z.start:z.pos:z.pos]
+	z.start = z.pos
+	return b
+}
+
+// Offset returns the character position in the buffer.
+func (z *Lexer) Offset() int {
+	return z.pos
+}
+
+// Bytes returns the underlying buffer.
+func (z *Lexer) Bytes() []byte {
+	return z.buf[: len(z.buf)-1 : len(z.buf)-1]
+}
+
+// Reset resets position to the underlying buffer.
+func (z *Lexer) Reset() {
+	z.start = 0
+	z.pos = 0
+}

vendor/github.com/tdewolff/parse/v2/buffer/reader.go

@@ -0,0 +1,44 @@
+package buffer
+
+import "io"
+
+// Reader implements an io.Reader over a byte slice.
+type Reader struct {
+	buf []byte
+	pos int
+}
+
+// NewReader returns a new Reader for a given byte slice.
+func NewReader(buf []byte) *Reader {
+	return &Reader{
+		buf: buf,
+	}
+}
+
+// Read reads bytes into the given byte slice and returns the number of bytes read and an error if occurred.
+func (r *Reader) Read(b []byte) (n int, err error) {
+	if len(b) == 0 {
+		return 0, nil
+	}
+	if r.pos >= len(r.buf) {
+		return 0, io.EOF
+	}
+	n = copy(b, r.buf[r.pos:])
+	r.pos += n
+	return
+}
+
+// Bytes returns the underlying byte slice.
+func (r *Reader) Bytes() []byte {
+	return r.buf
+}
+
+// Reset resets the position of the read pointer to the beginning of the underlying byte slice.
+func (r *Reader) Reset() {
+	r.pos = 0
+}
+
+// Len returns the length of the buffer.
+func (r *Reader) Len() int {
+	return len(r.buf)
+}

vendor/github.com/tdewolff/parse/v2/buffer/streamlexer.go

@@ -0,0 +1,223 @@
+package buffer
+
+import (
+	"io"
+)
+
+type block struct {
+	buf    []byte
+	next   int // index in pool plus one
+	active bool
+}
+
+type bufferPool struct {
+	pool []block
+	head int // index in pool plus one
+	tail int // index in pool plus one
+
+	pos int // byte pos in tail
+}
+
+func (z *bufferPool) swap(oldBuf []byte, size int) []byte {
+	// find new buffer that can be reused
+	swap := -1
+	for i := 0; i < len(z.pool); i++ {
+		if !z.pool[i].active && size <= cap(z.pool[i].buf) {
+			swap = i
+			break
+		}
+	}
+	if swap == -1 { // no free buffer found for reuse
+		if z.tail == 0 && z.pos >= len(oldBuf) && size <= cap(oldBuf) { // but we can reuse the current buffer!
+			z.pos -= len(oldBuf)
+			return oldBuf[:0]
+		}
+		// allocate new
+		z.pool = append(z.pool, block{make([]byte, 0, size), 0, true})
+		swap = len(z.pool) - 1
+	}
+
+	newBuf := z.pool[swap].buf
+
+	// put current buffer into pool
+	z.pool[swap] = block{oldBuf, 0, true}
+	if z.head != 0 {
+		z.pool[z.head-1].next = swap + 1
+	}
+	z.head = swap + 1
+	if z.tail == 0 {
+		z.tail = swap + 1
+	}
+
+	return newBuf[:0]
+}
+
+func (z *bufferPool) free(n int) {
+	z.pos += n
+	// move the tail over to next buffers
+	for z.tail != 0 && z.pos >= len(z.pool[z.tail-1].buf) {
+		z.pos -= len(z.pool[z.tail-1].buf)
+		newTail := z.pool[z.tail-1].next
+		z.pool[z.tail-1].active = false // after this, any thread may pick up the inactive buffer, so it can't be used anymore
+		z.tail = newTail
+	}
+	if z.tail == 0 {
+		z.head = 0
+	}
+}
+
+// StreamLexer is a buffered reader that allows peeking forward and shifting, taking an io.Reader.
+// It keeps data in-memory until Free, taking a byte length, is called to move beyond the data.
+type StreamLexer struct {
+	r   io.Reader
+	err error
+
+	pool bufferPool
+
+	buf       []byte
+	start     int // index in buf
+	pos       int // index in buf
+	prevStart int
+
+	free int
+}
+
+// NewStreamLexer returns a new StreamLexer for a given io.Reader with a 4kB estimated buffer size.
+// If the io.Reader implements Bytes, that buffer is used instead.
+func NewStreamLexer(r io.Reader) *StreamLexer {
+	return NewStreamLexerSize(r, defaultBufSize)
+}
+
+// NewStreamLexerSize returns a new StreamLexer for a given io.Reader and estimated required buffer size.
+// If the io.Reader implements Bytes, that buffer is used instead.
+func NewStreamLexerSize(r io.Reader, size int) *StreamLexer {
+	// if reader has the bytes in memory already, use that instead
+	if buffer, ok := r.(interface {
+		Bytes() []byte
+	}); ok {
+		return &StreamLexer{
+			err: io.EOF,
+			buf: buffer.Bytes(),
+		}
+	}
+	return &StreamLexer{
+		r:   r,
+		buf: make([]byte, 0, size),
+	}
+}
+
+func (z *StreamLexer) read(pos int) byte {
+	if z.err != nil {
+		return 0
+	}
+
+	// free unused bytes
+	z.pool.free(z.free)
+	z.free = 0
+
+	// get new buffer
+	c := cap(z.buf)
+	p := pos - z.start + 1
+	if 2*p > c { // if the token is larger than half the buffer, increase buffer size
+		c = 2*c + p
+	}
+	d := len(z.buf) - z.start
+	buf := z.pool.swap(z.buf[:z.start], c)
+	copy(buf[:d], z.buf[z.start:]) // copy the left-overs (unfinished token) from the old buffer
+
+	// read in new data for the rest of the buffer
+	var n int
+	for pos-z.start >= d && z.err == nil {
+		n, z.err = z.r.Read(buf[d:cap(buf)])
+		d += n
+	}
+	pos -= z.start
+	z.pos -= z.start
+	z.start, z.buf = 0, buf[:d]
+	if pos >= d {
+		return 0
+	}
+	return z.buf[pos]
+}
+
+// Err returns the error returned from io.Reader. It may still return valid bytes for a while though.
+func (z *StreamLexer) Err() error {
+	if z.err == io.EOF && z.pos < len(z.buf) {
+		return nil
+	}
+	return z.err
+}
+
+// Free frees up bytes of length n from previously shifted tokens.
+// Each call to Shift should at one point be followed by a call to Free with a length returned by ShiftLen.
+func (z *StreamLexer) Free(n int) {
+	z.free += n
+}
+
+// Peek returns the ith byte relative to the end position and possibly does an allocation.
+// Peek returns zero when an error has occurred, Err returns the error.
+// TODO: inline function
+func (z *StreamLexer) Peek(pos int) byte {
+	pos += z.pos
+	if uint(pos) < uint(len(z.buf)) { // uint for BCE
+		return z.buf[pos]
+	}
+	return z.read(pos)
+}
+
+// PeekRune returns the rune and rune length of the ith byte relative to the end position.
+func (z *StreamLexer) PeekRune(pos int) (rune, int) {
+	// from unicode/utf8
+	c := z.Peek(pos)
+	if c < 0xC0 {
+		return rune(c), 1
+	} else if c < 0xE0 {
+		return rune(c&0x1F)<<6 | rune(z.Peek(pos+1)&0x3F), 2
+	} else if c < 0xF0 {
+		return rune(c&0x0F)<<12 | rune(z.Peek(pos+1)&0x3F)<<6 | rune(z.Peek(pos+2)&0x3F), 3
+	}
+	return rune(c&0x07)<<18 | rune(z.Peek(pos+1)&0x3F)<<12 | rune(z.Peek(pos+2)&0x3F)<<6 | rune(z.Peek(pos+3)&0x3F), 4
+}
+
+// Move advances the position.
+func (z *StreamLexer) Move(n int) {
+	z.pos += n
+}
+
+// Pos returns a mark to which can be rewinded.
+func (z *StreamLexer) Pos() int {
+	return z.pos - z.start
+}
+
+// Rewind rewinds the position to the given position.
+func (z *StreamLexer) Rewind(pos int) {
+	z.pos = z.start + pos
+}
+
+// Lexeme returns the bytes of the current selection.
+func (z *StreamLexer) Lexeme() []byte {
+	return z.buf[z.start:z.pos]
+}
+
+// Skip collapses the position to the end of the selection.
+func (z *StreamLexer) Skip() {
+	z.start = z.pos
+}
+
+// Shift returns the bytes of the current selection and collapses the position to the end of the selection.
+// It also returns the number of bytes we moved since the last call to Shift. This can be used in calls to Free.
+func (z *StreamLexer) Shift() []byte {
+	if z.pos > len(z.buf) { // make sure we peeked at least as much as we shift
+		z.read(z.pos - 1)
+	}
+	b := z.buf[z.start:z.pos]
+	z.start = z.pos
+	return b
+}
+
+// ShiftLen returns the number of bytes moved since the last call to ShiftLen. This can be used in calls to Free because it takes into account multiple Shifts or Skips.
+func (z *StreamLexer) ShiftLen() int {
+	n := z.start - z.prevStart
+	z.prevStart = z.start
+	return n
+}

vendor/github.com/tdewolff/parse/v2/buffer/writer.go

@@ -0,0 +1,41 @@
+package buffer
+
+// Writer implements an io.Writer over a byte slice.
+type Writer struct {
+	buf []byte
+}
+
+// NewWriter returns a new Writer for a given byte slice.
+func NewWriter(buf []byte) *Writer {
+	return &Writer{
+		buf: buf,
+	}
+}
+
+// Write writes bytes from the given byte slice and returns the number of bytes written and an error if occurred. When err != nil, n == 0.
+func (w *Writer) Write(b []byte) (int, error) {
+	n := len(b)
+	end := len(w.buf)
+	if end+n > cap(w.buf) {
+		buf := make([]byte, end, 2*cap(w.buf)+n)
+		copy(buf, w.buf)
+		w.buf = buf
+	}
+	w.buf = w.buf[:end+n]
+	return copy(w.buf[end:], b), nil
+}
+
+// Len returns the length of the underlying byte slice.
+func (w *Writer) Len() int {
+	return len(w.buf)
+}
+
+// Bytes returns the underlying byte slice.
+func (w *Writer) Bytes() []byte {
+	return w.buf
+}
+
+// Reset empties and reuses the current buffer. Subsequent writes will overwrite the buffer, so any reference to the underlying slice is invalidated after this call.
+func (w *Writer) Reset() {
+	w.buf = w.buf[:0]
+}

vendor/github.com/tdewolff/parse/v2/common.go

@@ -0,0 +1,237 @@
+// Package parse contains a collection of parsers for various formats in its subpackages.
+package parse
+
+import (
+	"bytes"
+	"encoding/base64"
+	"errors"
+)
+
+var (
+	dataSchemeBytes = []byte("data:")
+	base64Bytes     = []byte("base64")
+	textMimeBytes   = []byte("text/plain")
+)
+
+// ErrBadDataURI is returned by DataURI when the byte slice does not start with 'data:' or is too short.
+var ErrBadDataURI = errors.New("not a data URI")
+
+// Number returns the number of bytes that parse as a number of the regex format (+|-)?([0-9]+(\.[0-9]+)?|\.[0-9]+)((e|E)(+|-)?[0-9]+)?.
+func Number(b []byte) int {
+	if len(b) == 0 {
+		return 0
+	}
+	i := 0
+	if b[i] == '+' || b[i] == '-' {
+		i++
+		if i >= len(b) {
+			return 0
+		}
+	}
+	firstDigit := (b[i] >= '0' && b[i] <= '9')
+	if firstDigit {
+		i++
+		for i < len(b) && b[i] >= '0' && b[i] <= '9' {
+			i++
+		}
+	}
+	if i < len(b) && b[i] == '.' {
+		i++
+		if i < len(b) && b[i] >= '0' && b[i] <= '9' {
+			i++
+			for i < len(b) && b[i] >= '0' && b[i] <= '9' {
+				i++
+			}
+		} else if firstDigit {
+			// . could belong to the next token
+			i--
+			return i
+		} else {
+			return 0
+		}
+	} else if !firstDigit {
+		return 0
+	}
+	iOld := i
+	if i < len(b) && (b[i] == 'e' || b[i] == 'E') {
+		i++
+		if i < len(b) && (b[i] == '+' || b[i] == '-') {
+			i++
+		}
+		if i >= len(b) || b[i] < '0' || b[i] > '9' {
+			// e could belong to next token
+			return iOld
+		}
+		for i < len(b) && b[i] >= '0' && b[i] <= '9' {
+			i++
+		}
+	}
+	return i
+}
+
+// Dimension parses a byte-slice and returns the length of the number and its unit.
+func Dimension(b []byte) (int, int) {
+	num := Number(b)
+	if num == 0 || num == len(b) {
+		return num, 0
+	} else if b[num] == '%' {
+		return num, 1
+	} else if b[num] >= 'a' && b[num] <= 'z' || b[num] >= 'A' && b[num] <= 'Z' {
+		i := num + 1
+		for i < len(b) && (b[i] >= 'a' && b[i] <= 'z' || b[i] >= 'A' && b[i] <= 'Z') {
+			i++
+		}
+		return num, i - num
+	}
+	return num, 0
+}
+
+// Mediatype parses a given mediatype and splits the mimetype from the parameters.
+// It works similar to mime.ParseMediaType but is faster.
+func Mediatype(b []byte) ([]byte, map[string]string) {
+	i := 0
+	for i < len(b) && b[i] == ' ' {
+		i++
+	}
+	b = b[i:]
+	n := len(b)
+	mimetype := b
+	var params map[string]string
+	for i := 3; i < n; i++ { // mimetype is at least three characters long
+		if b[i] == ';' || b[i] == ' ' {
+			mimetype = b[:i]
+			if b[i] == ' ' {
+				i++ // space
+				for i < n && b[i] == ' ' {
+					i++
+				}
+				if n <= i || b[i] != ';' {
+					break
+				}
+			}
+			params = map[string]string{}
+			s := string(b)
+		PARAM:
+			i++ // semicolon
+			for i < n && s[i] == ' ' {
+				i++
+			}
+			start := i
+			for i < n && s[i] != '=' && s[i] != ';' && s[i] != ' ' {
+				i++
+			}
+			key := s[start:i]
+			for i < n && s[i] == ' ' {
+				i++
+			}
+			if i < n && s[i] == '=' {
+				i++
+				for i < n && s[i] == ' ' {
+					i++
+				}
+				start = i
+				for i < n && s[i] != ';' && s[i] != ' ' {
+					i++
+				}
+			} else {
+				start = i
+			}
+			params[key] = s[start:i]
+			for i < n && s[i] == ' ' {
+				i++
+			}
+			if i < n && s[i] == ';' {
+				goto PARAM
+			}
+			break
+		}
+	}
+	return mimetype, params
+}
+
+// DataURI parses the given data URI and returns the mediatype, data and ok.
+func DataURI(dataURI []byte) ([]byte, []byte, error) {
+	if len(dataURI) > 5 && bytes.Equal(dataURI[:5], dataSchemeBytes) {
+		dataURI = dataURI[5:]
+		inBase64 := false
+		var mediatype []byte
+		i := 0
+		for j := 0; j < len(dataURI); j++ {
+			c := dataURI[j]
+			if c == '=' || c == ';' || c == ',' {
+				if c != '=' && bytes.Equal(TrimWhitespace(dataURI[i:j]), base64Bytes) {
+					if len(mediatype) > 0 {
+						mediatype = mediatype[:len(mediatype)-1]
+					}
+					inBase64 = true
+					i = j
+				} else if c != ',' {
+					mediatype = append(append(mediatype, TrimWhitespace(dataURI[i:j])...), c)
+					i = j + 1
+				} else {
+					mediatype = append(mediatype, TrimWhitespace(dataURI[i:j])...)
+				}
+				if c == ',' {
+					if len(mediatype) == 0 || mediatype[0] == ';' {
+						mediatype = textMimeBytes
+					}
+					data := dataURI[j+1:]
+					if inBase64 {
+						decoded := make([]byte, base64.StdEncoding.DecodedLen(len(data)))
+						n, err := base64.StdEncoding.Decode(decoded, data)
+						if err != nil {
+							return nil, nil, err
+						}
+						data = decoded[:n]
+					} else {
+						data = DecodeURL(data)
+					}
+					return mediatype, data, nil
+				}
+			}
+		}
+	}
+	return nil, nil, ErrBadDataURI
+}
+
+// QuoteEntity parses the given byte slice and returns the quote that got matched (' or ") and its entity length.
+// TODO: deprecated
+func QuoteEntity(b []byte) (quote byte, n int) {
+	if len(b) < 5 || b[0] != '&' {
+		return 0, 0
+	}
+	if b[1] == '#' {
+		if b[2] == 'x' {
+			i := 3
+			for i < len(b) && b[i] == '0' {
+				i++
+			}
+			if i+2 < len(b) && b[i] == '2' && b[i+2] == ';' {
+				if b[i+1] == '2' {
+					return '"', i + 3 // &#x22;
+				} else if b[i+1] == '7' {
+					return '\'', i + 3 // &#x27;
+				}
+			}
+		} else {
+			i := 2
+			for i < len(b) && b[i] == '0' {
+				i++
+			}
+			if i+2 < len(b) && b[i] == '3' && b[i+2] == ';' {
+				if b[i+1] == '4' {
+					return '"', i + 3 // &#34;
+				} else if b[i+1] == '9' {
+					return '\'', i + 3 // &#39;
+				}
+			}
+		}
+	} else if len(b) >= 6 && b[5] == ';' {
+		if bytes.Equal(b[1:5], []byte{'q', 'u', 'o', 't'}) {
+			return '"', 6 // &quot;
+		} else if bytes.Equal(b[1:5], []byte{'a', 'p', 'o', 's'}) {
+			return '\'', 6 // &apos;
+		}
+	}
+	return 0, 0
+}

vendor/github.com/tdewolff/parse/v2/error.go

@@ -0,0 +1,47 @@
+package parse
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+// Error is a parsing error returned by parser. It contains a message and an offset at which the error occurred.
+type Error struct {
+	Message string
+	Line    int
+	Column  int
+	Context string
+}
+
+// NewError creates a new error
+func NewError(r io.Reader, offset int, message string, a ...interface{}) *Error {
+	line, column, context := Position(r, offset)
+	if 0 < len(a) {
+		message = fmt.Sprintf(message, a...)
+	}
+	return &Error{
+		Message: message,
+		Line:    line,
+		Column:  column,
+		Context: context,
+	}
+}
+
+// NewErrorLexer creates a new error from an active Lexer.
+func NewErrorLexer(l *Input, message string, a ...interface{}) *Error {
+	r := bytes.NewBuffer(l.Bytes())
+	offset := l.Offset()
+	return NewError(r, offset, message, a...)
+}
+
+// Position returns the line, column, and context of the error.
+// Context is the entire line at which the error occurred.
+func (e *Error) Position() (int, int, string) {
+	return e.Line, e.Column, e.Context
+}
+
+// Error returns the error string, containing the context and line + column number.
+func (e *Error) Error() string {
+	return fmt.Sprintf("%s on line %d and column %d\n%s", e.Message, e.Line, e.Column, e.Context)
+}

vendor/github.com/tdewolff/parse/v2/go.mod

@@ -0,0 +1,5 @@
+module github.com/tdewolff/parse/v2
+
+go 1.13
+
+require github.com/tdewolff/test v1.0.6

vendor/github.com/tdewolff/parse/v2/go.sum

@@ -0,0 +1,2 @@
+github.com/tdewolff/test v1.0.6 h1:76mzYJQ83Op284kMT+63iCNCI7NEERsIN8dLM+RiKr4=
+github.com/tdewolff/test v1.0.6/go.mod h1:6DAvZliBAAnD7rhVgwaM7DE5/d9NMOAJ09SqYqeK4QE=

vendor/github.com/tdewolff/parse/v2/html/README.md

@@ -0,0 +1,98 @@
+# HTML [![API reference](https://img.shields.io/badge/godoc-reference-5272B4)](https://pkg.go.dev/github.com/tdewolff/parse/v2/html?tab=doc)
+
+This package is an HTML5 lexer written in [Go][1]. It follows the specification at [The HTML syntax](http://www.w3.org/TR/html5/syntax.html). The lexer takes an io.Reader and converts it into tokens until the EOF.
+
+## Installation
+Run the following command
+
+	go get -u github.com/tdewolff/parse/v2/html
+
+or add the following import and run project with `go get`
+
+	import "github.com/tdewolff/parse/v2/html"
+
+## Lexer
+### Usage
+The following initializes a new Lexer with io.Reader `r`:
+``` go
+l := html.NewLexer(parse.NewInput(r))
+```
+
+To tokenize until EOF an error, use:
+``` go
+for {
+	tt, data := l.Next()
+	switch tt {
+	case html.ErrorToken:
+		// error or EOF set in l.Err()
+		return
+	case html.StartTagToken:
+		// ...
+		for {
+			ttAttr, dataAttr := l.Next()
+			if ttAttr != html.AttributeToken {
+				break
+			}
+			// ...
+		}
+	// ...
+	}
+}
+```
+
+All tokens:
+``` go
+ErrorToken TokenType = iota // extra token when errors occur
+CommentToken
+DoctypeToken
+StartTagToken
+StartTagCloseToken
+StartTagVoidToken
+EndTagToken
+AttributeToken
+TextToken
+```
+
+### Examples
+``` go
+package main
+
+import (
+	"os"
+
+	"github.com/tdewolff/parse/v2/html"
+)
+
+// Tokenize HTML from stdin.
+func main() {
+	l := html.NewLexer(parse.NewInput(os.Stdin))
+	for {
+		tt, data := l.Next()
+		switch tt {
+		case html.ErrorToken:
+			if l.Err() != io.EOF {
+				fmt.Println("Error on line", l.Line(), ":", l.Err())
+			}
+			return
+		case html.StartTagToken:
+			fmt.Println("Tag", string(data))
+			for {
+				ttAttr, dataAttr := l.Next()
+				if ttAttr != html.AttributeToken {
+					break
+				}
+
+				key := dataAttr
+				val := l.AttrVal()
+				fmt.Println("Attribute", string(key), "=", string(val))
+			}
+		// ...
+		}
+	}
+}
+```
+
+## License
+Released under the [MIT license](https://github.com/tdewolff/parse/blob/master/LICENSE.md).
+
+[1]: http://golang.org/ "Go Language"

vendor/github.com/tdewolff/parse/v2/html/hash.go

@@ -0,0 +1,81 @@
+package html
+
+// generated by hasher -type=Hash -file=hash.go; DO NOT EDIT, except for adding more constants to the list and rerun go generate
+
+// uses github.com/tdewolff/hasher
+//go:generate hasher -type=Hash -file=hash.go
+
+// Hash defines perfect hashes for a predefined list of strings
+type Hash uint32
+
+// Unique hash definitions to be used instead of strings
+const (
+	Iframe    Hash = 0x6    // iframe
+	Math      Hash = 0x604  // math
+	Plaintext Hash = 0x1e09 // plaintext
+	Script    Hash = 0xa06  // script
+	Style     Hash = 0x1405 // style
+	Svg       Hash = 0x1903 // svg
+	Textarea  Hash = 0x2308 // textarea
+	Title     Hash = 0xf05  // title
+	Xmp       Hash = 0x1c03 // xmp
+)
+
+// String returns the hash' name.
+func (i Hash) String() string {
+	start := uint32(i >> 8)
+	n := uint32(i & 0xff)
+	if start+n > uint32(len(_Hash_text)) {
+		return ""
+	}
+	return _Hash_text[start : start+n]
+}
+
+// ToHash returns the hash whose name is s. It returns zero if there is no
+// such hash. It is case sensitive.
+func ToHash(s []byte) Hash {
+	if len(s) == 0 || len(s) > _Hash_maxLen {
+		return 0
+	}
+	h := uint32(_Hash_hash0)
+	for i := 0; i < len(s); i++ {
+		h ^= uint32(s[i])
+		h *= 16777619
+	}
+	if i := _Hash_table[h&uint32(len(_Hash_table)-1)]; int(i&0xff) == len(s) {
+		t := _Hash_text[i>>8 : i>>8+i&0xff]
+		for i := 0; i < len(s); i++ {
+			if t[i] != s[i] {
+				goto NEXT
+			}
+		}
+		return i
+	}
+NEXT:
+	if i := _Hash_table[(h>>16)&uint32(len(_Hash_table)-1)]; int(i&0xff) == len(s) {
+		t := _Hash_text[i>>8 : i>>8+i&0xff]
+		for i := 0; i < len(s); i++ {
+			if t[i] != s[i] {
+				return 0
+			}
+		}
+		return i
+	}
+	return 0
+}
+
+const _Hash_hash0 = 0x9acb0442
+const _Hash_maxLen = 9
+const _Hash_text = "iframemathscriptitlestylesvgxmplaintextarea"
+
+var _Hash_table = [1 << 4]Hash{
+	0x0: 0x2308, // textarea
+	0x2: 0x6,    // iframe
+	0x4: 0xf05,  // title
+	0x5: 0x1e09, // plaintext
+	0x7: 0x1405, // style
+	0x8: 0x604,  // math
+	0x9: 0xa06,  // script
+	0xa: 0x1903, // svg
+	0xb: 0x1c03, // xmp
+}

vendor/github.com/tdewolff/parse/v2/html/lex.go

@@ -0,0 +1,493 @@
+// Package html is an HTML5 lexer following the specifications at http://www.w3.org/TR/html5/syntax.html.
+package html
+
+import (
+	"strconv"
+
+	"github.com/tdewolff/parse/v2"
+)
+
+// TokenType determines the type of token, eg. a number or a semicolon.
+type TokenType uint32
+
+// TokenType values.
+const (
+	ErrorToken TokenType = iota // extra token when errors occur
+	CommentToken
+	DoctypeToken
+	StartTagToken
+	StartTagCloseToken
+	StartTagVoidToken
+	EndTagToken
+	AttributeToken
+	TextToken
+	SvgToken
+	MathToken
+)
+
+// String returns the string representation of a TokenType.
+func (tt TokenType) String() string {
+	switch tt {
+	case ErrorToken:
+		return "Error"
+	case CommentToken:
+		return "Comment"
+	case DoctypeToken:
+		return "Doctype"
+	case StartTagToken:
+		return "StartTag"
+	case StartTagCloseToken:
+		return "StartTagClose"
+	case StartTagVoidToken:
+		return "StartTagVoid"
+	case EndTagToken:
+		return "EndTag"
+	case AttributeToken:
+		return "Attribute"
+	case TextToken:
+		return "Text"
+	case SvgToken:
+		return "Svg"
+	case MathToken:
+		return "Math"
+	}
+	return "Invalid(" + strconv.Itoa(int(tt)) + ")"
+}
+
+////////////////////////////////////////////////////////////////
+
+// Lexer is the state for the lexer.
+type Lexer struct {
+	r   *parse.Input
+	err error
+
+	rawTag Hash
+	inTag  bool
+
+	text    []byte
+	attrVal []byte
+}
+
+// NewLexer returns a new Lexer for a given io.Reader.
+func NewLexer(r *parse.Input) *Lexer {
+	return &Lexer{
+		r: r,
+	}
+}
+
+// Err returns the error encountered during lexing, this is often io.EOF but also other errors can be returned.
+func (l *Lexer) Err() error {
+	if l.err != nil {
+		return l.err
+	}
+	return l.r.Err()
+}
+
+// Text returns the textual representation of a token. This excludes delimiters and additional leading/trailing characters.
+func (l *Lexer) Text() []byte {
+	return l.text
+}
+
+// AttrVal returns the attribute value when an AttributeToken was returned from Next.
+func (l *Lexer) AttrVal() []byte {
+	return l.attrVal
+}
+
+// Next returns the next Token. It returns ErrorToken when an error was encountered. Using Err() one can retrieve the error message.
+func (l *Lexer) Next() (TokenType, []byte) {
+	l.text = nil
+	var c byte
+	if l.inTag {
+		l.attrVal = nil
+		for { // before attribute name state
+			if c = l.r.Peek(0); c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' {
+				l.r.Move(1)
+				continue
+			}
+			break
+		}
+		if c == 0 && l.r.Err() != nil {
+			return ErrorToken, nil
+		} else if c != '>' && (c != '/' || l.r.Peek(1) != '>') {
+			return AttributeToken, l.shiftAttribute()
+		}
+		l.r.Skip()
+		l.inTag = false
+		if c == '/' {
+			l.r.Move(2)
+			return StartTagVoidToken, l.r.Shift()
+		}
+		l.r.Move(1)
+		return StartTagCloseToken, l.r.Shift()
+	}
+
+	if l.rawTag != 0 {
+		if rawText := l.shiftRawText(); len(rawText) > 0 {
+			l.rawTag = 0
+			return TextToken, rawText
+		}
+		l.rawTag = 0
+	}
+
+	for {
+		c = l.r.Peek(0)
+		if c == '<' {
+			c = l.r.Peek(1)
+			isEndTag := c == '/' && l.r.Peek(2) != '>' && (l.r.Peek(2) != 0 || l.r.PeekErr(2) == nil)
+			if l.r.Pos() > 0 {
+				if isEndTag || 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || c == '!' || c == '?' {
+					// return currently buffered texttoken so that we can return tag next iteration
+					l.text = l.r.Shift()
+					return TextToken, l.text
+				}
+			} else if isEndTag {
+				l.r.Move(2)
+				// only endtags that are not followed by > or EOF arrive here
+				if c = l.r.Peek(0); !('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z') {
+					return CommentToken, l.shiftBogusComment()
+				}
+				return EndTagToken, l.shiftEndTag()
+			} else if 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' {
+				l.r.Move(1)
+				l.inTag = true
+				return l.shiftStartTag()
+			} else if c == '!' {
+				l.r.Move(2)
+				return l.readMarkup()
+			} else if c == '?' {
+				l.r.Move(1)
+				return CommentToken, l.shiftBogusComment()
+			}
+		} else if c == 0 && l.r.Err() != nil {
+			if l.r.Pos() > 0 {
+				l.text = l.r.Shift()
+				return TextToken, l.text
+			}
+			return ErrorToken, nil
+		}
+		l.r.Move(1)
+	}
+}
+
+////////////////////////////////////////////////////////////////
+
+// The following functions follow the specifications at https://html.spec.whatwg.org/multipage/parsing.html
+
+func (l *Lexer) shiftRawText() []byte {
+	if l.rawTag == Plaintext {
+		for {
+			if l.r.Peek(0) == 0 && l.r.Err() != nil {
+				return l.r.Shift()
+			}
+			l.r.Move(1)
+		}
+	} else { // RCDATA, RAWTEXT and SCRIPT
+		for {
+			c := l.r.Peek(0)
+			if c == '<' {
+				if l.r.Peek(1) == '/' {
+					mark := l.r.Pos()
+					l.r.Move(2)
+					for {
+						if c = l.r.Peek(0); !('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z') {
+							break
+						}
+						l.r.Move(1)
+					}
+					if h := ToHash(parse.ToLower(parse.Copy(l.r.Lexeme()[mark+2:]))); h == l.rawTag { // copy so that ToLower doesn't change the case of the underlying slice
+						l.r.Rewind(mark)
+						return l.r.Shift()
+					}
+				} else if l.rawTag == Script && l.r.Peek(1) == '!' && l.r.Peek(2) == '-' && l.r.Peek(3) == '-' {
+					l.r.Move(4)
+					inScript := false
+					for {
+						c := l.r.Peek(0)
+						if c == '-' && l.r.Peek(1) == '-' && l.r.Peek(2) == '>' {
+							l.r.Move(3)
+							break
+						} else if c == '<' {
+							isEnd := l.r.Peek(1) == '/'
+							if isEnd {
+								l.r.Move(2)
+							} else {
+								l.r.Move(1)
+							}
+							mark := l.r.Pos()
+							for {
+								if c = l.r.Peek(0); !('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z') {
+									break
+								}
+								l.r.Move(1)
+							}
+							if h := ToHash(parse.ToLower(parse.Copy(l.r.Lexeme()[mark:]))); h == Script { // copy so that ToLower doesn't change the case of the underlying slice
+								if !isEnd {
+									inScript = true
+								} else {
+									if !inScript {
+										l.r.Rewind(mark - 2)
+										return l.r.Shift()
+									}
+									inScript = false
+								}
+							}
+						} else if c == 0 && l.r.Err() != nil {
+							return l.r.Shift()
+						} else {
+							l.r.Move(1)
+						}
+					}
+				} else {
+					l.r.Move(1)
+				}
+			} else if c == 0 && l.r.Err() != nil {
+				return l.r.Shift()
+			} else {
+				l.r.Move(1)
+			}
+		}
+	}
+}
+
+func (l *Lexer) readMarkup() (TokenType, []byte) {
+	if l.at('-', '-') {
+		l.r.Move(2)
+		for {
+			if l.r.Peek(0) == 0 && l.r.Err() != nil {
+				l.text = l.r.Lexeme()[4:]
+				return CommentToken, l.r.Shift()
+			} else if l.at('-', '-', '>') {
+				l.text = l.r.Lexeme()[4:]
+				l.r.Move(3)
+				return CommentToken, l.r.Shift()
+			} else if l.at('-', '-', '!', '>') {
+				l.text = l.r.Lexeme()[4:]
+				l.r.Move(4)
+				return CommentToken, l.r.Shift()
+			}
+			l.r.Move(1)
+		}
+	} else if l.at('[', 'C', 'D', 'A', 'T', 'A', '[') {
+		l.r.Move(7)
+		for {
+			if l.r.Peek(0) == 0 && l.r.Err() != nil {
+				l.text = l.r.Lexeme()[9:]
+				return TextToken, l.r.Shift()
+			} else if l.at(']', ']', '>') {
+				l.text = l.r.Lexeme()[9:]
+				l.r.Move(3)
+				return TextToken, l.r.Shift()
+			}
+			l.r.Move(1)
+		}
+	} else {
+		if l.atCaseInsensitive('d', 'o', 'c', 't', 'y', 'p', 'e') {
+			l.r.Move(7)
+			if l.r.Peek(0) == ' ' {
+				l.r.Move(1)
+			}
+			for {
+				if c := l.r.Peek(0); c == '>' || c == 0 && l.r.Err() != nil {
+					l.text = l.r.Lexeme()[9:]
+					if c == '>' {
+						l.r.Move(1)
+					}
+					return DoctypeToken, l.r.Shift()
+				}
+				l.r.Move(1)
+			}
+		}
+	}
+	return CommentToken, l.shiftBogusComment()
+}
+
+func (l *Lexer) shiftBogusComment() []byte {
+	for {
+		c := l.r.Peek(0)
+		if c == '>' {
+			l.text = l.r.Lexeme()[2:]
+			l.r.Move(1)
+			return l.r.Shift()
+		} else if c == 0 && l.r.Err() != nil {
+			l.text = l.r.Lexeme()[2:]
+			return l.r.Shift()
+		}
+		l.r.Move(1)
+	}
+}
+
+func (l *Lexer) shiftStartTag() (TokenType, []byte) {
+	for {
+		if c := l.r.Peek(0); c == ' ' || c == '>' || c == '/' && l.r.Peek(1) == '>' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == 0 && l.r.Err() != nil {
+			break
+		}
+		l.r.Move(1)
+	}
+	l.text = parse.ToLower(l.r.Lexeme()[1:])
+	if h := ToHash(l.text); h == Textarea || h == Title || h == Style || h == Xmp || h == Iframe || h == Script || h == Plaintext || h == Svg || h == Math {
+		if h == Svg || h == Math {
+			data := l.shiftXML(h)
+			if l.err != nil {
+				return ErrorToken, nil
+			}
+
+			l.inTag = false
+			if h == Svg {
+				return SvgToken, data
+			}
+			return MathToken, data
+		}
+		l.rawTag = h
+	}
+	return StartTagToken, l.r.Shift()
+}
+
+func (l *Lexer) shiftAttribute() []byte {
+	nameStart := l.r.Pos()
+	var c byte
+	for { // attribute name state
+		if c = l.r.Peek(0); c == ' ' || c == '=' || c == '>' || c == '/' && l.r.Peek(1) == '>' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == 0 && l.r.Err() != nil {
+			break
+		}
+		l.r.Move(1)
+	}
+	nameEnd := l.r.Pos()
+	for { // after attribute name state
+		if c = l.r.Peek(0); c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' {
+			l.r.Move(1)
+			continue
+		}
+		break
+	}
+	if c == '=' {
+		l.r.Move(1)
+		for { // before attribute value state
+			if c = l.r.Peek(0); c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' {
+				l.r.Move(1)
+				continue
+			}
+			break
+		}
+		attrPos := l.r.Pos()
+		delim := c
+		if delim == '"' || delim == '\'' { // attribute value single- and double-quoted state
+			l.r.Move(1)
+			for {
+				c := l.r.Peek(0)
+				if c == delim {
+					l.r.Move(1)
+					break
+				} else if c == 0 && l.r.Err() != nil {
+					break
+				}
+				l.r.Move(1)
+			}
+		} else { // attribute value unquoted state
+			for {
+				if c := l.r.Peek(0); c == ' ' || c == '>' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == 0 && l.r.Err() != nil {
+					break
+				}
+				l.r.Move(1)
+			}
+		}
+		l.attrVal = l.r.Lexeme()[attrPos:]
+	} else {
+		l.r.Rewind(nameEnd)
+		l.attrVal = nil
+	}
+	l.text = parse.ToLower(l.r.Lexeme()[nameStart:nameEnd])
+	return l.r.Shift()
+}
+
+func (l *Lexer) shiftEndTag() []byte {
+	for {
+		c := l.r.Peek(0)
+		if c == '>' {
+			l.text = l.r.Lexeme()[2:]
+			l.r.Move(1)
+			break
+		} else if c == 0 && l.r.Err() != nil {
+			l.text = l.r.Lexeme()[2:]
+			break
+		}
+		l.r.Move(1)
+	}
+
+	end := len(l.text)
+	for end > 0 {
+		if c := l.text[end-1]; c == ' ' || c == '\t' || c == '\n' || c == '\r' {
+			end--
+			continue
+		}
+		break
+	}
+	l.text = l.text[:end]
+	return parse.ToLower(l.r.Shift())
+}
+
+// shiftXML parses the content of a svg or math tag according to the XML 1.1 specifications, including the tag itself.
+// So far we have already parsed `<svg` or `<math`.
+func (l *Lexer) shiftXML(rawTag Hash) []byte {
+	inQuote := false
+	for {
+		c := l.r.Peek(0)
+		if c == '"' {
+			inQuote = !inQuote
+			l.r.Move(1)
+		} else if c == '<' && !inQuote && l.r.Peek(1) == '/' {
+			mark := l.r.Pos()
+			l.r.Move(2)
+			for {
+				if c = l.r.Peek(0); !('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z') {
+					break
+				}
+				l.r.Move(1)
+			}
+			if h := ToHash(parse.ToLower(parse.Copy(l.r.Lexeme()[mark+2:]))); h == rawTag { // copy so that ToLower doesn't change the case of the underlying slice
+				break
+			}
+		} else if c == 0 {
+			if l.r.Err() == nil {
+				l.err = parse.NewErrorLexer(l.r, "HTML parse error: unexpected NULL character")
+			}
+			return l.r.Shift()
+		} else {
+			l.r.Move(1)
+		}
+	}
+
+	for {
+		c := l.r.Peek(0)
+		if c == '>' {
+			l.r.Move(1)
+			break
+		} else if c == 0 {
+			if l.r.Err() == nil {
+				l.err = parse.NewErrorLexer(l.r, "HTML parse error: unexpected NULL character")
+			}
+			return l.r.Shift()
+		}
+		l.r.Move(1)
+	}
+	return l.r.Shift()
+}
+
+////////////////////////////////////////////////////////////////
+
+func (l *Lexer) at(b ...byte) bool {
+	for i, c := range b {
+		if l.r.Peek(i) != c {
+			return false
+		}
+	}
+	return true
+}
+
+func (l *Lexer) atCaseInsensitive(b ...byte) bool {
+	for i, c := range b {
+		if l.r.Peek(i) != c && (l.r.Peek(i)+('a'-'A')) != c {
+			return false
+		}
+	}
+	return true
+}

vendor/github.com/tdewolff/parse/v2/html/util.go

@@ -0,0 +1,103 @@
+package html
+
+var (
+	singleQuoteEntityBytes = []byte("'")
+	doubleQuoteEntityBytes = []byte(""")
+)
+
+// EscapeAttrVal returns the escaped attribute value bytes without quotes.
+func EscapeAttrVal(buf *[]byte, orig, b []byte, isXML bool) []byte {
+	singles := 0
+	doubles := 0
+	unquoted := true
+	entities := false
+	for _, c := range b {
+		if charTable[c] {
+			unquoted = false
+			if c == '"' {
+				doubles++
+			} else if c == '\'' {
+				singles++
+			}
+		}
+	}
+	if unquoted && !isXML {
+		return b
+	} else if !entities && len(orig) == len(b)+2 && (singles == 0 && orig[0] == '\'' || doubles == 0 && orig[0] == '"') {
+		return orig
+	}
+
+	n := len(b) + 2
+	var quote byte
+	var escapedQuote []byte
+	if singles >= doubles || isXML {
+		n += doubles * 4
+		quote = '"'
+		escapedQuote = doubleQuoteEntityBytes
+	} else {
+		n += singles * 4
+		quote = '\''
+		escapedQuote = singleQuoteEntityBytes
+	}
+	if n > cap(*buf) {
+		*buf = make([]byte, 0, n) // maximum size, not actual size
+	}
+	t := (*buf)[:n] // maximum size, not actual size
+	t[0] = quote
+	j := 1
+	start := 0
+	for i, c := range b {
+		if c == quote {
+			j += copy(t[j:], b[start:i])
+			j += copy(t[j:], escapedQuote)
+			start = i + 1
+		}
+	}
+	j += copy(t[j:], b[start:])
+	t[j] = quote
+	return t[:j+1]
+}
+
+var charTable = [256]bool{
+	// ASCII
+	false, false, false, false, false, false, false, false,
+	false, true, true, false, true, true, false, false, // tab, line feed, form feed, carriage return
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	true, false, true, false, false, false, false, true, // space, "), '
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, true, true, true, false, // <, =, >
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	true, false, false, false, false, false, false, false, // `
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	// non-ASCII
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+}

vendor/github.com/tdewolff/parse/v2/input.go

@@ -0,0 +1,173 @@
+package parse
+
+import (
+	"io"
+	"io/ioutil"
+)
+
+var nullBuffer = []byte{0}
+
+// Input is a buffered reader that allows peeking forward and shifting, taking an io.Input.
+// It keeps data in-memory until Free, taking a byte length, is called to move beyond the data.
+type Input struct {
+	buf   []byte
+	pos   int // index in buf
+	start int // index in buf
+	err   error
+
+	restore func()
+}
+
+// NewInput returns a new Input for a given io.Input and uses ioutil.ReadAll to read it into a byte slice.
+// If the io.Input implements Bytes, that is used instead. It will append a NULL at the end of the buffer.
+func NewInput(r io.Reader) *Input {
+	var b []byte
+	if r != nil {
+		if buffer, ok := r.(interface {
+			Bytes() []byte
+		}); ok {
+			b = buffer.Bytes()
+		} else {
+			var err error
+			b, err = ioutil.ReadAll(r)
+			if err != nil {
+				return &Input{
+					buf: nullBuffer,
+					err: err,
+				}
+			}
+		}
+	}
+	return NewInputBytes(b)
+}
+
+// NewInputString returns a new Input for a given string and appends NULL at the end.
+func NewInputString(s string) *Input {
+	return NewInputBytes([]byte(s))
+}
+
+// NewInputBytes returns a new Input for a given byte slice and appends NULL at the end.
+// To avoid reallocation, make sure the capacity has room for one more byte.
+func NewInputBytes(b []byte) *Input {
+	z := &Input{
+		buf: b,
+	}
+
+	n := len(b)
+	if n == 0 {
+		z.buf = nullBuffer
+	} else {
+		// Append NULL to buffer, but try to avoid reallocation
+		if cap(b) > n {
+			// Overwrite next byte but restore when done
+			b = b[:n+1]
+			c := b[n]
+			b[n] = 0
+
+			z.buf = b
+			z.restore = func() {
+				b[n] = c
+			}
+		} else {
+			z.buf = append(b, 0)
+		}
+	}
+	return z
+}
+
+// Restore restores the replaced byte past the end of the buffer by NULL.
+func (z *Input) Restore() {
+	if z.restore != nil {
+		z.restore()
+		z.restore = nil
+	}
+}
+
+// Err returns the error returned from io.Input or io.EOF when the end has been reached.
+func (z *Input) Err() error {
+	return z.PeekErr(0)
+}
+
+// PeekErr returns the error at position pos. When pos is zero, this is the same as calling Err().
+func (z *Input) PeekErr(pos int) error {
+	if z.err != nil {
+		return z.err
+	} else if z.pos+pos >= len(z.buf)-1 {
+		return io.EOF
+	}
+	return nil
+}
+
+// Peek returns the ith byte relative to the end position.
+// Peek returns 0 when an error has occurred, Err returns the erroz.
+func (z *Input) Peek(pos int) byte {
+	pos += z.pos
+	return z.buf[pos]
+}
+
+// PeekRune returns the rune and rune length of the ith byte relative to the end position.
+func (z *Input) PeekRune(pos int) (rune, int) {
+	// from unicode/utf8
+	c := z.Peek(pos)
+	if c < 0xC0 || z.Peek(pos+1) == 0 {
+		return rune(c), 1
+	} else if c < 0xE0 || z.Peek(pos+2) == 0 {
+		return rune(c&0x1F)<<6 | rune(z.Peek(pos+1)&0x3F), 2
+	} else if c < 0xF0 || z.Peek(pos+3) == 0 {
+		return rune(c&0x0F)<<12 | rune(z.Peek(pos+1)&0x3F)<<6 | rune(z.Peek(pos+2)&0x3F), 3
+	}
+	return rune(c&0x07)<<18 | rune(z.Peek(pos+1)&0x3F)<<12 | rune(z.Peek(pos+2)&0x3F)<<6 | rune(z.Peek(pos+3)&0x3F), 4
+}
+
+// Move advances the position.
+func (z *Input) Move(n int) {
+	z.pos += n
+}
+
+// Pos returns a mark to which can be rewinded.
+func (z *Input) Pos() int {
+	return z.pos - z.start
+}
+
+// Rewind rewinds the position to the given position.
+func (z *Input) Rewind(pos int) {
+	z.pos = z.start + pos
+}
+
+// Lexeme returns the bytes of the current selection.
+func (z *Input) Lexeme() []byte {
+	return z.buf[z.start:z.pos:z.pos]
+}
+
+// Skip collapses the position to the end of the selection.
+func (z *Input) Skip() {
+	z.start = z.pos
+}
+
+// Shift returns the bytes of the current selection and collapses the position to the end of the selection.
+func (z *Input) Shift() []byte {
+	b := z.buf[z.start:z.pos:z.pos]
+	z.start = z.pos
+	return b
+}
+
+// Offset returns the character position in the buffez.
+func (z *Input) Offset() int {
+	return z.pos
+}
+
+// Bytes returns the underlying buffez.
+func (z *Input) Bytes() []byte {
+	return z.buf[: len(z.buf)-1 : len(z.buf)-1]
+}
+
+// Len returns the length of the underlying buffez.
+func (z *Input) Len() int {
+	return len(z.buf) - 1
+}
+
+// Reset resets position to the underlying buffez.
+func (z *Input) Reset() {
+	z.start = 0
+	z.pos = 0
+}

vendor/github.com/tdewolff/parse/v2/position.go

@@ -0,0 +1,95 @@
+package parse
+
+import (
+	"fmt"
+	"io"
+	"strings"
+	"unicode"
+)
+
+// Position returns the line and column number for a certain position in a file. It is useful for recovering the position in a file that caused an error.
+// It only treates \n, \r, and \r\n as newlines, which might be different from some languages also recognizing \f, \u2028, and \u2029 to be newlines.
+func Position(r io.Reader, offset int) (line, col int, context string) {
+	l := NewInput(r)
+	line = 1
+	for l.Pos() < offset {
+		c := l.Peek(0)
+		n := 1
+		newline := false
+		if c == '\n' {
+			newline = true
+		} else if c == '\r' {
+			if l.Peek(1) == '\n' {
+				newline = true
+				n = 2
+			} else {
+				newline = true
+			}
+		} else if c >= 0xC0 {
+			var r rune
+			if r, n = l.PeekRune(0); r == '\u2028' || r == '\u2029' {
+				newline = true
+			}
+		} else if c == 0 && l.Err() != nil {
+			break
+		}
+
+		if 1 < n && offset < l.Pos()+n {
+			break
+		}
+		l.Move(n)
+
+		if newline {
+			line++
+			offset -= l.Pos()
+			l.Skip()
+		}
+	}
+
+	col = len([]rune(string(l.Lexeme()))) + 1
+	context = positionContext(l, line, col)
+	return
+}
+
+func positionContext(l *Input, line, col int) (context string) {
+	for {
+		c := l.Peek(0)
+		if c == 0 && l.Err() != nil || c == '\n' || c == '\r' {
+			break
+		}
+		l.Move(1)
+	}
+	rs := []rune(string(l.Lexeme()))
+
+	// cut off front or rear of context to stay between 60 characters
+	limit := 60
+	offset := 20
+	ellipsisFront := ""
+	ellipsisRear := ""
+	if limit < len(rs) {
+		if col <= limit-offset {
+			ellipsisRear = "..."
+			rs = rs[:limit-3]
+		} else if col >= len(rs)-offset-3 {
+			ellipsisFront = "..."
+			col -= len(rs) - offset - offset - 7
+			rs = rs[len(rs)-offset-offset-4:]
+		} else {
+			ellipsisFront = "..."
+			ellipsisRear = "..."
+			rs = rs[col-offset-1 : col+offset]
+			col = offset + 4
+		}
+	}
+
+	// replace unprintable characters by a space
+	for i, r := range rs {
+		if !unicode.IsGraphic(r) {
+			rs[i] = '·'
+		}
+	}
+
+	context += fmt.Sprintf("%5d: %s%s%s\n", line, ellipsisFront, string(rs), ellipsisRear)
+	context += fmt.Sprintf("%s^", strings.Repeat(" ", 6+col))
+	return
+}

vendor/github.com/tdewolff/parse/v2/strconv/float.go

@@ -0,0 +1,257 @@
+package strconv
+
+import (
+	"math"
+)
+
+var float64pow10 = []float64{
+	1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
+	1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
+	1e20, 1e21, 1e22,
+}
+
+// ParseFloat parses a byte-slice and returns the float it represents.
+// If an invalid character is encountered, it will stop there.
+func ParseFloat(b []byte) (float64, int) {
+	i := 0
+	neg := false
+	if i < len(b) && (b[i] == '+' || b[i] == '-') {
+		neg = b[i] == '-'
+		i++
+	}
+	start := i
+	dot := -1
+	trunk := -1
+	n := uint64(0)
+	for ; i < len(b); i++ {
+		c := b[i]
+		if c >= '0' && c <= '9' {
+			if trunk == -1 {
+				if n > math.MaxUint64/10 {
+					trunk = i
+				} else {
+					n *= 10
+					n += uint64(c - '0')
+				}
+			}
+		} else if dot == -1 && c == '.' {
+			dot = i
+		} else {
+			break
+		}
+	}
+	if i == start || i == start+1 && dot == start {
+		return 0.0, 0
+	}
+
+	f := float64(n)
+	if neg {
+		f = -f
+	}
+
+	mantExp := int64(0)
+	if dot != -1 {
+		if trunk == -1 {
+			trunk = i
+		}
+		mantExp = int64(trunk - dot - 1)
+	} else if trunk != -1 {
+		mantExp = int64(trunk - i)
+	}
+	expExp := int64(0)
+	if i < len(b) && (b[i] == 'e' || b[i] == 'E') {
+		startExp := i
+		i++
+		if e, expLen := ParseInt(b[i:]); expLen > 0 {
+			expExp = e
+			i += expLen
+		} else {
+			i = startExp
+		}
+	}
+	exp := expExp - mantExp
+
+	// copied from strconv/atof.go
+	if exp == 0 {
+		return f, i
+	} else if exp > 0 && exp <= 15+22 { // int * 10^k
+		// If exponent is big but number of digits is not,
+		// can move a few zeros into the integer part.
+		if exp > 22 {
+			f *= float64pow10[exp-22]
+			exp = 22
+		}
+		if f <= 1e15 && f >= -1e15 {
+			return f * float64pow10[exp], i
+		}
+	} else if exp < 0 && exp >= -22 { // int / 10^k
+		return f / float64pow10[-exp], i
+	}
+	f *= math.Pow10(int(-mantExp))
+	return f * math.Pow10(int(expExp)), i
+}
+
+const log2 = 0.3010299956639812
+
+func float64exp(f float64) int {
+	exp2 := 0
+	if f != 0.0 {
+		x := math.Float64bits(f)
+		exp2 = int(x>>(64-11-1))&0x7FF - 1023 + 1
+	}
+
+	exp10 := float64(exp2) * log2
+	if exp10 < 0 {
+		exp10 -= 1.0
+	}
+	return int(exp10)
+}
+
+// AppendFloat appends a float to `b` with precision `prec`. It returns the new slice and whether successful or not. Precision is the number of decimals to display, thus prec + 1 == number of significant digits.
+func AppendFloat(b []byte, f float64, prec int) ([]byte, bool) {
+	if math.IsNaN(f) || math.IsInf(f, 0) {
+		return b, false
+	}
+
+	neg := false
+	if f < 0.0 {
+		f = -f
+		neg = true
+	}
+	if prec < 0 || 17 < prec {
+		prec = 17 // maximum number of significant digits in double
+	}
+	prec -= float64exp(f) // number of digits in front of the dot
+	f *= math.Pow10(prec)
+
+	// calculate mantissa and exponent
+	mant := int64(f)
+	mantLen := LenInt(mant)
+	mantExp := mantLen - prec - 1
+	if mant == 0 {
+		return append(b, '0'), true
+	}
+
+	// expLen is zero for positive exponents, because positive exponents are determined later on in the big conversion loop
+	exp := 0
+	expLen := 0
+	if mantExp > 0 {
+		// positive exponent is determined in the loop below
+		// but if we initially decreased the exponent to fit in an integer, we can't set the new exponent in the loop alone,
+		// since the number of zeros at the end determines the positive exponent in the loop, and we just artificially lost zeros
+		if prec < 0 {
+			exp = mantExp
+		}
+		expLen = 1 + LenInt(int64(exp)) // e + digits
+	} else if mantExp < -3 {
+		exp = mantExp
+		expLen = 2 + LenInt(int64(exp)) // e + minus + digits
+	} else if mantExp < -1 {
+		mantLen += -mantExp - 1 // extra zero between dot and first digit
+	}
+
+	// reserve space in b
+	i := len(b)
+	maxLen := 1 + mantLen + expLen // dot + mantissa digits + exponent
+	if neg {
+		maxLen++
+	}
+	if i+maxLen > cap(b) {
+		b = append(b, make([]byte, maxLen)...)
+	} else {
+		b = b[:i+maxLen]
+	}
+
+	// write to string representation
+	if neg {
+		b[i] = '-'
+		i++
+	}
+
+	// big conversion loop, start at the end and move to the front
+	// initially print trailing zeros and remove them later on
+	// for example if the first non-zero digit is three positions in front of the dot, it will overwrite the zeros with a positive exponent
+	zero := true
+	last := i + mantLen      // right-most position of digit that is non-zero + dot
+	dot := last - prec - exp // position of dot
+	j := last
+	for mant > 0 {
+		if j == dot {
+			b[j] = '.'
+			j--
+		}
+		newMant := mant / 10
+		digit := mant - 10*newMant
+		if zero && digit > 0 {
+			// first non-zero digit, if we are still behind the dot we can trim the end to this position
+			// otherwise trim to the dot (including the dot)
+			if j > dot {
+				i = j + 1
+				// decrease negative exponent further to get rid of dot
+				if exp < 0 {
+					newExp := exp - (j - dot)
+					// getting rid of the dot shouldn't lower the exponent to more digits (e.g. -9 -> -10)
+					if LenInt(int64(newExp)) == LenInt(int64(exp)) {
+						exp = newExp
+						dot = j
+						j--
+						i--
+					}
+				}
+			} else {
+				i = dot
+			}
+			last = j
+			zero = false
+		}
+		b[j] = '0' + byte(digit)
+		j--
+		mant = newMant
+	}
+
+	if j > dot {
+		// extra zeros behind the dot
+		for j > dot {
+			b[j] = '0'
+			j--
+		}
+		b[j] = '.'
+	} else if last+3 < dot {
+		// add positive exponent because we have 3 or more zeros in front of the dot
+		i = last + 1
+		exp = dot - last - 1
+	} else if j == dot {
+		// handle 0.1
+		b[j] = '.'
+	}
+
+	// exponent
+	if exp != 0 {
+		if exp == 1 {
+			b[i] = '0'
+			i++
+		} else if exp == 2 {
+			b[i] = '0'
+			b[i+1] = '0'
+			i += 2
+		} else {
+			b[i] = 'e'
+			i++
+			if exp < 0 {
+				b[i] = '-'
+				i++
+				exp = -exp
+			}
+			i += LenInt(int64(exp))
+			j := i
+			for exp > 0 {
+				newExp := exp / 10
+				digit := exp - 10*newExp
+				j--
+				b[j] = '0' + byte(digit)
+				exp = newExp
+			}
+		}
+	}
+	return b[:i], true
+}

vendor/github.com/tdewolff/parse/v2/strconv/int.go

@@ -0,0 +1,88 @@
+package strconv
+
+import (
+	"math"
+)
+
+// ParseInt parses a byte-slice and returns the integer it represents.
+// If an invalid character is encountered, it will stop there.
+func ParseInt(b []byte) (int64, int) {
+	i := 0
+	neg := false
+	if len(b) > 0 && (b[0] == '+' || b[0] == '-') {
+		neg = b[0] == '-'
+		i++
+	}
+	start := i
+	n := uint64(0)
+	for i < len(b) {
+		c := b[i]
+		if n > math.MaxUint64/10 {
+			return 0, 0
+		} else if c >= '0' && c <= '9' {
+			n *= 10
+			n += uint64(c - '0')
+		} else {
+			break
+		}
+		i++
+	}
+	if i == start {
+		return 0, 0
+	}
+	if !neg && n > uint64(math.MaxInt64) || n > uint64(math.MaxInt64)+1 {
+		return 0, 0
+	} else if neg {
+		return -int64(n), i
+	}
+	return int64(n), i
+}
+
+// LenInt returns the written length of an integer.
+func LenInt(i int64) int {
+	if i < 0 {
+		if i == -9223372036854775808 {
+			return 19
+		}
+		i = -i
+	}
+	switch {
+	case i < 10:
+		return 1
+	case i < 100:
+		return 2
+	case i < 1000:
+		return 3
+	case i < 10000:
+		return 4
+	case i < 100000:
+		return 5
+	case i < 1000000:
+		return 6
+	case i < 10000000:
+		return 7
+	case i < 100000000:
+		return 8
+	case i < 1000000000:
+		return 9
+	case i < 10000000000:
+		return 10
+	case i < 100000000000:
+		return 11
+	case i < 1000000000000:
+		return 12
+	case i < 10000000000000:
+		return 13
+	case i < 100000000000000:
+		return 14
+	case i < 1000000000000000:
+		return 15
+	case i < 10000000000000000:
+		return 16
+	case i < 100000000000000000:
+		return 17
+	case i < 1000000000000000000:
+		return 18
+	}
+	return 19
+}

vendor/github.com/tdewolff/parse/v2/strconv/price.go

@@ -0,0 +1,83 @@
+package strconv
+
+// AppendPrice will append an int64 formatted as a price, where the int64 is the price in cents.
+// It does not display whether a price is negative or not.
+func AppendPrice(b []byte, price int64, dec bool, milSeparator byte, decSeparator byte) []byte {
+	if price < 0 {
+		if price == -9223372036854775808 {
+			x := []byte("92 233 720 368 547 758 08")
+			x[2] = milSeparator
+			x[6] = milSeparator
+			x[10] = milSeparator
+			x[14] = milSeparator
+			x[18] = milSeparator
+			x[22] = decSeparator
+			return append(b, x...)
+		}
+		price = -price
+	}
+
+	// rounding
+	if !dec {
+		firstDec := (price / 10) % 10
+		if firstDec >= 5 {
+			price += 100
+		}
+	}
+
+	// calculate size
+	n := LenInt(price) - 2
+	if n > 0 {
+		n += (n - 1) / 3 // mil separator
+	} else {
+		n = 1
+	}
+	if dec {
+		n += 2 + 1 // decimals + dec separator
+	}
+
+	// resize byte slice
+	i := len(b)
+	if i+n > cap(b) {
+		b = append(b, make([]byte, n)...)
+	} else {
+		b = b[:i+n]
+	}
+
+	// print fractional-part
+	i += n - 1
+	if dec {
+		for j := 0; j < 2; j++ {
+			c := byte(price%10) + '0'
+			price /= 10
+			b[i] = c
+			i--
+		}
+		b[i] = decSeparator
+		i--
+	} else {
+		price /= 100
+	}
+
+	if price == 0 {
+		b[i] = '0'
+		return b
+	}
+
+	// print integer-part
+	j := 0
+	for price > 0 {
+		if j == 3 {
+			b[i] = milSeparator
+			i--
+			j = 0
+		}
+
+		c := byte(price%10) + '0'
+		price /= 10
+		b[i] = c
+		i--
+		j++
+	}
+	return b
+}

vendor/github.com/tdewolff/parse/v2/util.go

@@ -0,0 +1,489 @@
+package parse
+
+import (
+	"bytes"
+	"fmt"
+	"strconv"
+	"unicode"
+)
+
+// Copy returns a copy of the given byte slice.
+func Copy(src []byte) (dst []byte) {
+	dst = make([]byte, len(src))
+	copy(dst, src)
+	return
+}
+
+// ToLower converts all characters in the byte slice from A-Z to a-z.
+func ToLower(src []byte) []byte {
+	for i, c := range src {
+		if c >= 'A' && c <= 'Z' {
+			src[i] = c + ('a' - 'A')
+		}
+	}
+	return src
+}
+
+// EqualFold returns true when s matches case-insensitively the targetLower (which must be lowercase).
+func EqualFold(s, targetLower []byte) bool {
+	if len(s) != len(targetLower) {
+		return false
+	}
+	for i, c := range targetLower {
+		d := s[i]
+		if d != c && (d < 'A' || d > 'Z' || d+('a'-'A') != c) {
+			return false
+		}
+	}
+	return true
+}
+
+// Printable returns a printable string for given rune
+func Printable(r rune) string {
+	if unicode.IsGraphic(r) {
+		return fmt.Sprintf("%c", r)
+	} else if r < 128 {
+		return fmt.Sprintf("0x%02X", r)
+	}
+	return fmt.Sprintf("%U", r)
+}
+
+var whitespaceTable = [256]bool{
+	// ASCII
+	false, false, false, false, false, false, false, false,
+	false, true, true, false, true, true, false, false, // tab, new line, form feed, carriage return
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	true, false, false, false, false, false, false, false, // space
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	// non-ASCII
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+}
+
+// IsWhitespace returns true for space, \n, \r, \t, \f.
+func IsWhitespace(c byte) bool {
+	return whitespaceTable[c]
+}
+
+var newlineTable = [256]bool{
+	// ASCII
+	false, false, false, false, false, false, false, false,
+	false, false, true, false, false, true, false, false, // new line, carriage return
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	// non-ASCII
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+}
+
+// IsNewline returns true for \n, \r.
+func IsNewline(c byte) bool {
+	return newlineTable[c]
+}
+
+// IsAllWhitespace returns true when the entire byte slice consists of space, \n, \r, \t, \f.
+func IsAllWhitespace(b []byte) bool {
+	for _, c := range b {
+		if !IsWhitespace(c) {
+			return false
+		}
+	}
+	return true
+}
+
+// TrimWhitespace removes any leading and trailing whitespace characters.
+func TrimWhitespace(b []byte) []byte {
+	n := len(b)
+	start := n
+	for i := 0; i < n; i++ {
+		if !IsWhitespace(b[i]) {
+			start = i
+			break
+		}
+	}
+	end := n
+	for i := n - 1; i >= start; i-- {
+		if !IsWhitespace(b[i]) {
+			end = i + 1
+			break
+		}
+	}
+	return b[start:end]
+}
+
+// ReplaceMultipleWhitespace replaces character series of space, \n, \t, \f, \r into a single space or newline (when the serie contained a \n or \r).
+func ReplaceMultipleWhitespace(b []byte) []byte {
+	j, k := 0, 0 // j is write position, k is start of next text section
+	for i := 0; i < len(b); i++ {
+		if IsWhitespace(b[i]) {
+			start := i
+			newline := IsNewline(b[i])
+			i++
+			for ; i < len(b) && IsWhitespace(b[i]); i++ {
+				if IsNewline(b[i]) {
+					newline = true
+				}
+			}
+			if newline {
+				b[start] = '\n'
+			} else {
+				b[start] = ' '
+			}
+			if 1 < i-start { // more than one whitespace
+				if j == 0 {
+					j = start + 1
+				} else {
+					j += copy(b[j:], b[k:start+1])
+				}
+				k = i
+			}
+		}
+	}
+	if j == 0 {
+		return b
+	} else if j == 1 { // only if starts with whitespace
+		b[k-1] = b[0]
+		return b[k-1:]
+	} else if k < len(b) {
+		j += copy(b[j:], b[k:])
+	}
+	return b[:j]
+}
+
+// replaceEntities will replace in b at index i, assuming that b[i] == '&' and that i+3<len(b). The returned int will be the last character of the entity, so that the next iteration can safely do i++ to continue and not miss any entitites.
+func replaceEntities(b []byte, i int, entitiesMap map[string][]byte, revEntitiesMap map[byte][]byte) ([]byte, int) {
+	const MaxEntityLength = 31 // longest HTML entity: CounterClockwiseContourIntegral
+	var r []byte
+	j := i + 1
+	if b[j] == '#' {
+		j++
+		if b[j] == 'x' {
+			j++
+			c := 0
+			for ; j < len(b) && (b[j] >= '0' && b[j] <= '9' || b[j] >= 'a' && b[j] <= 'f' || b[j] >= 'A' && b[j] <= 'F'); j++ {
+				if b[j] <= '9' {
+					c = c<<4 + int(b[j]-'0')
+				} else if b[j] <= 'F' {
+					c = c<<4 + int(b[j]-'A') + 10
+				} else if b[j] <= 'f' {
+					c = c<<4 + int(b[j]-'a') + 10
+				}
+			}
+			if j <= i+3 || 10000 <= c {
+				return b, j - 1
+			}
+			if c < 128 {
+				r = []byte{byte(c)}
+			} else {
+				r = append(r, '&', '#')
+				r = strconv.AppendInt(r, int64(c), 10)
+				r = append(r, ';')
+			}
+		} else {
+			c := 0
+			for ; j < len(b) && c < 128 && b[j] >= '0' && b[j] <= '9'; j++ {
+				c = c*10 + int(b[j]-'0')
+			}
+			if j <= i+2 || 128 <= c {
+				return b, j - 1
+			}
+			r = []byte{byte(c)}
+		}
+	} else {
+		for ; j < len(b) && j-i-1 <= MaxEntityLength && b[j] != ';'; j++ {
+		}
+		if j <= i+1 || len(b) <= j {
+			return b, j - 1
+		}
+
+		var ok bool
+		r, ok = entitiesMap[string(b[i+1:j])]
+		if !ok {
+			return b, j
+		}
+	}
+
+	// j is at semicolon
+	n := j + 1 - i
+	if j < len(b) && b[j] == ';' && 2 < n {
+		if len(r) == 1 {
+			if q, ok := revEntitiesMap[r[0]]; ok {
+				if len(q) == len(b[i:j+1]) && bytes.Equal(q, b[i:j+1]) {
+					return b, j
+				}
+				r = q
+			} else if r[0] == '&' {
+				// check if for example &amp; is followed by something that could potentially be an entity
+				k := j + 1
+				if k < len(b) && b[k] == '#' {
+					k++
+				}
+				for ; k < len(b) && k-j <= MaxEntityLength && (b[k] >= '0' && b[k] <= '9' || b[k] >= 'a' && b[k] <= 'z' || b[k] >= 'A' && b[k] <= 'Z'); k++ {
+				}
+				if k < len(b) && b[k] == ';' {
+					return b, k
+				}
+			}
+		}
+
+		copy(b[i:], r)
+		copy(b[i+len(r):], b[j+1:])
+		b = b[:len(b)-n+len(r)]
+		return b, i + len(r) - 1
+	}
+	return b, i
+}
+
+// ReplaceEntities replaces all occurrences of entites (such as &quot;) to their respective unencoded bytes.
+func ReplaceEntities(b []byte, entitiesMap map[string][]byte, revEntitiesMap map[byte][]byte) []byte {
+	for i := 0; i < len(b); i++ {
+		if b[i] == '&' && i+3 < len(b) {
+			b, i = replaceEntities(b, i, entitiesMap, revEntitiesMap)
+		}
+	}
+	return b
+}
+
+// ReplaceMultipleWhitespaceAndEntities is a combination of ReplaceMultipleWhitespace and ReplaceEntities. It is faster than executing both sequentially.
+func ReplaceMultipleWhitespaceAndEntities(b []byte, entitiesMap map[string][]byte, revEntitiesMap map[byte][]byte) []byte {
+	j, k := 0, 0 // j is write position, k is start of next text section
+	for i := 0; i < len(b); i++ {
+		if IsWhitespace(b[i]) {
+			start := i
+			newline := IsNewline(b[i])
+			i++
+			for ; i < len(b) && IsWhitespace(b[i]); i++ {
+				if IsNewline(b[i]) {
+					newline = true
+				}
+			}
+			if newline {
+				b[start] = '\n'
+			} else {
+				b[start] = ' '
+			}
+			if 1 < i-start { // more than one whitespace
+				if j == 0 {
+					j = start + 1
+				} else {
+					j += copy(b[j:], b[k:start+1])
+				}
+				k = i
+			}
+		}
+		if i+3 < len(b) && b[i] == '&' {
+			b, i = replaceEntities(b, i, entitiesMap, revEntitiesMap)
+		}
+	}
+	if j == 0 {
+		return b
+	} else if j == 1 { // only if starts with whitespace
+		b[k-1] = b[0]
+		return b[k-1:]
+	} else if k < len(b) {
+		j += copy(b[j:], b[k:])
+	}
+	return b[:j]
+}
+
+// URLEncodingTable is a charmap for which characters need escaping in the URL encoding scheme
+var URLEncodingTable = [256]bool{
+	// ASCII
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+
+	true, false, true, true, true, true, true, false, // space, ", #, $, %, &
+	false, false, false, true, true, false, false, true, // +, comma, /
+	false, false, false, false, false, false, false, false,
+	false, false, true, true, true, true, true, true, // :, ;, <, =, >, ?
+
+	true, false, false, false, false, false, false, false, // @
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, true, true, true, true, false, // [, \, ], ^
+
+	true, false, false, false, false, false, false, false, // `
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, true, true, true, false, true, // {, |, }, DEL
+
+	// non-ASCII
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+}
+
+// DataURIEncodingTable is a charmap for which characters need escaping in the Data URI encoding scheme
+// Escape only non-printable characters, unicode and %, #, &. IE11 additionally requires encoding of
+// \, [, ], ", <, >, `, {, }, |, ^ which is not required by Chrome, Firefox, Opera, Edge, Safari, Yandex
+var DataURIEncodingTable = [256]bool{
+	// ASCII
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+
+	false, false, true, true, false, true, true, false, // ", #, %, &
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, true, false, true, false, // <, >
+
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, true, true, true, true, false, // [, \, ], ^
+
+	true, false, false, false, false, false, false, false, // `
+	false, false, false, false, false, false, false, false,
+	false, false, false, false, false, false, false, false,
+	false, false, false, true, true, true, false, true, // {, |, }, DEL
+
+	// non-ASCII
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+	true, true, true, true, true, true, true, true,
+}
+
+// EncodeURL encodes bytes using the URL encoding scheme
+func EncodeURL(b []byte, table [256]bool) []byte {
+	for i := 0; i < len(b); i++ {
+		c := b[i]
+		if table[c] {
+			if c == ' ' {
+				b[i] = '+'
+			} else {
+				b = append(b, 0, 0)
+				copy(b[i+3:], b[i+1:])
+				b[i+0] = '%'
+				b[i+1] = "0123456789ABCDEF"[c>>4]
+				b[i+2] = "0123456789ABCDEF"[c&15]
+			}
+		}
+	}
+	return b
+}
+
+// DecodeURL decodes an URL encoded using the URL encoding scheme
+func DecodeURL(b []byte) []byte {
+	for i := 0; i < len(b); i++ {
+		if b[i] == '%' && i+2 < len(b) {
+			j := i + 1
+			c := 0
+			for ; j < i+3 && (b[j] >= '0' && b[j] <= '9' || b[j] >= 'a' && b[j] <= 'f' || b[j] >= 'A' && b[j] <= 'F'); j++ {
+				if b[j] <= '9' {
+					c = c<<4 + int(b[j]-'0')
+				} else if b[j] <= 'F' {
+					c = c<<4 + int(b[j]-'A') + 10
+				} else if b[j] <= 'f' {
+					c = c<<4 + int(b[j]-'a') + 10
+				}
+			}
+			if j == i+3 && c < 128 {
+				b[i] = byte(c)
+				b = append(b[:i+1], b[i+3:]...)
+			}
+		} else if b[i] == '+' {
+			b[i] = ' '
+		}
+	}
+	return b
+}

vendor/modules.txt

@@ -364,6 +364,15 @@ github.com/superseriousbusiness/oauth2/v4/generates
 github.com/superseriousbusiness/oauth2/v4/manage
 github.com/superseriousbusiness/oauth2/v4/models
 github.com/superseriousbusiness/oauth2/v4/server
+# github.com/tdewolff/minify/v2 v2.9.21
+## explicit
+github.com/tdewolff/minify/v2
+github.com/tdewolff/minify/v2/html
+# github.com/tdewolff/parse/v2 v2.5.19
+github.com/tdewolff/parse/v2
+github.com/tdewolff/parse/v2/buffer
+github.com/tdewolff/parse/v2/html
+github.com/tdewolff/parse/v2/strconv
 # github.com/tidwall/buntdb v1.2.4
 ## explicit
 # github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc