mirror of
https://github.com/superseriousbusiness/gotosocial.git
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38f041cea1
* [feature] Allow users to export data via the settings panel * rename/move some stuff
151 lines
4.5 KiB
Go
151 lines
4.5 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package util
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import "strings"
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const (
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// Possible GoToSocial mimetypes.
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AppJSON = `application/json`
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AppXML = `application/xml`
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appXMLText = `text/xml` // AppXML is only *recommended* in RFC7303
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AppXMLXRD = `application/xrd+xml`
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AppRSSXML = `application/rss+xml`
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AppActivityJSON = `application/activity+json`
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appActivityLDJSON = `application/ld+json` // without profile
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AppActivityLDJSON = appActivityLDJSON + `; profile="https://www.w3.org/ns/activitystreams"`
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AppJRDJSON = `application/jrd+json` // https://www.rfc-editor.org/rfc/rfc7033#section-10.2
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AppForm = `application/x-www-form-urlencoded`
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MultipartForm = `multipart/form-data`
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TextXML = `text/xml`
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TextHTML = `text/html`
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TextCSS = `text/css`
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TextCSV = `text/csv`
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)
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// JSONContentType returns whether is application/json(;charset=utf-8)? content-type.
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func JSONContentType(ct string) bool {
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p := splitContentType(ct)
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p, ok := isUTF8ContentType(p)
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return ok && len(p) == 1 &&
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p[0] == AppJSON
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}
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// JSONJRDContentType returns whether is application/(jrd+)?json(;charset=utf-8)? content-type.
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func JSONJRDContentType(ct string) bool {
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p := splitContentType(ct)
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p, ok := isUTF8ContentType(p)
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return ok && len(p) == 1 &&
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p[0] == AppJSON ||
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p[0] == AppJRDJSON
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}
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// XMLContentType returns whether is application/xml(;charset=utf-8)? content-type.
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func XMLContentType(ct string) bool {
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p := splitContentType(ct)
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p, ok := isUTF8ContentType(p)
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return ok && len(p) == 1 &&
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p[0] == AppXML ||
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p[0] == appXMLText
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}
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// XMLXRDContentType returns whether is application/(xrd+)?xml(;charset=utf-8)? content-type.
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func XMLXRDContentType(ct string) bool {
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p := splitContentType(ct)
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p, ok := isUTF8ContentType(p)
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return ok && len(p) == 1 &&
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p[0] == AppXML ||
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p[0] == appXMLText ||
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p[0] == AppXMLXRD
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}
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// ASContentType returns whether is valid ActivityStreams content-types:
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// - application/activity+json
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// - application/ld+json;profile=https://w3.org/ns/activitystreams
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func ASContentType(ct string) bool {
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p := splitContentType(ct)
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p, ok := isUTF8ContentType(p)
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if !ok {
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return false
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}
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switch len(p) {
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case 1:
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return p[0] == AppActivityJSON
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case 2:
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return p[0] == appActivityLDJSON &&
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p[1] == "profile=https://www.w3.org/ns/activitystreams" ||
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p[1] == "profile=\"https://www.w3.org/ns/activitystreams\""
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default:
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return false
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}
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}
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// NodeInfo2ContentType returns whether is nodeinfo schema 2.0 content-type.
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func NodeInfo2ContentType(ct string) bool {
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p := splitContentType(ct)
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p, ok := isUTF8ContentType(p)
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if !ok {
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return false
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}
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switch len(p) {
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case 1:
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return p[0] == AppJSON
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case 2:
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return p[0] == AppJSON &&
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p[1] == "profile=\"http://nodeinfo.diaspora.software/ns/schema/2.0#\"" ||
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p[1] == "profile=http://nodeinfo.diaspora.software/ns/schema/2.0#"
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default:
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return false
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}
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}
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// isUTF8ContentType checks for a provided charset in given
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// type parts list, removes it and returns whether is utf-8.
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func isUTF8ContentType(p []string) ([]string, bool) {
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const charset = "charset="
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const charsetUTF8 = charset + "utf-8"
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for i, part := range p {
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// Only handle charset slice parts.
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if strings.HasPrefix(part, charset) {
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// Check if is UTF-8 charset.
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ok := (part == charsetUTF8)
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// Drop this slice part.
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_ = copy(p[i:], p[i+1:])
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p = p[:len(p)-1]
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return p, ok
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}
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}
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return p, true
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}
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// splitContentType splits content-type into semi-colon
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// separated parts. useful when a charset is provided.
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// note this also maps all chars to their lowercase form.
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func splitContentType(ct string) []string {
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s := strings.Split(ct, ";")
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for i := range s {
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s[i] = strings.TrimSpace(s[i])
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s[i] = strings.ToLower(s[i])
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}
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return s
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}
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