mirror of
https://github.com/superseriousbusiness/gotosocial.git
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[bugfix] Update exif-terminator (fix png issue) (#2391)
* [bugfix] Update exif-terminator (fix png issue) * bump exif terminator * fix tests
This commit is contained in:
tobi
GitHub
parent
6abe91ceb2
commit
0108463e7b
4
go.mod
4
go.mod
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@ -45,7 +45,7 @@ require (
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github.com/spf13/viper v1.16.0
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github.com/stretchr/testify v1.8.4
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github.com/superseriousbusiness/activity v1.4.0-gts
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github.com/superseriousbusiness/exif-terminator v0.5.0
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github.com/superseriousbusiness/exif-terminator v0.6.0
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github.com/superseriousbusiness/oauth2/v4 v4.3.2-SSB.0.20230227143000-f4900831d6c8
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github.com/tdewolff/minify/v2 v2.20.7
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github.com/technologize/otel-go-contrib v1.1.0
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@ -101,7 +101,6 @@ require (
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github.com/dsoprea/go-iptc v0.0.0-20200610044640-bc9ca208b413 // indirect
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github.com/dsoprea/go-logging v0.0.0-20200710184922-b02d349568dd // indirect
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github.com/dsoprea/go-photoshop-info-format v0.0.0-20200610045659-121dd752914d // indirect
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github.com/dsoprea/go-png-image-structure/v2 v2.0.0-20210512210324-29b889a6093d // indirect
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github.com/dsoprea/go-utility/v2 v2.0.0-20200717064901-2fccff4aa15e // indirect
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github.com/dustin/go-humanize v1.0.1 // indirect
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github.com/fsnotify/fsnotify v1.7.0 // indirect
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@ -160,6 +159,7 @@ require (
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github.com/spf13/pflag v1.0.5 // indirect
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github.com/subosito/gotenv v1.4.2 // indirect
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github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe // indirect
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github.com/superseriousbusiness/go-png-image-structure/v2 v2.0.1-SSB // indirect
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github.com/tdewolff/parse/v2 v2.7.5 // indirect
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github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc // indirect
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github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
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8
go.sum
8
go.sum
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@ -152,8 +152,6 @@ github.com/dsoprea/go-logging v0.0.0-20200710184922-b02d349568dd h1:l+vLbuxptsC6
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github.com/dsoprea/go-logging v0.0.0-20200710184922-b02d349568dd/go.mod h1:7I+3Pe2o/YSU88W0hWlm9S22W7XI1JFNJ86U0zPKMf8=
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github.com/dsoprea/go-photoshop-info-format v0.0.0-20200610045659-121dd752914d h1:dg6UMHa50VI01WuPWXPbNJpO8QSyvIF5T5n2IZiqX3A=
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github.com/dsoprea/go-photoshop-info-format v0.0.0-20200610045659-121dd752914d/go.mod h1:pqKB+ijp27cEcrHxhXVgUUMlSDRuGJJp1E+20Lj5H0E=
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github.com/dsoprea/go-png-image-structure/v2 v2.0.0-20210512210324-29b889a6093d h1:2zNIgrJTspLxUKoJGl0Ln24+hufPKSjP3cu4++5MeSE=
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github.com/dsoprea/go-png-image-structure/v2 v2.0.0-20210512210324-29b889a6093d/go.mod h1:scnx0wQSM7UiCMK66dSdiPZvL2hl6iF5DvpZ7uT59MY=
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github.com/dsoprea/go-utility v0.0.0-20200711062821-fab8125e9bdf/go.mod h1:95+K3z2L0mqsVYd6yveIv1lmtT3tcQQ3dVakPySffW8=
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github.com/dsoprea/go-utility/v2 v2.0.0-20200717064901-2fccff4aa15e h1:IxIbA7VbCNrwumIYjDoMOdf4KOSkMC6NJE4s8oRbE7E=
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github.com/dsoprea/go-utility/v2 v2.0.0-20200717064901-2fccff4aa15e/go.mod h1:uAzdkPTub5Y9yQwXe8W4m2XuP0tK4a9Q/dantD0+uaU=
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@ -505,10 +503,12 @@ github.com/subosito/gotenv v1.4.2/go.mod h1:ayKnFf/c6rvx/2iiLrJUk1e6plDbT3edrFNG
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github.com/sunfish-shogi/bufseekio v0.0.0-20210207115823-a4185644b365/go.mod h1:dEzdXgvImkQ3WLI+0KQpmEx8T/C/ma9KeS3AfmU899I=
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github.com/superseriousbusiness/activity v1.4.0-gts h1:9r95sYy80tuGWWpDDNlLwa/k6dKZdyP/k+rhVA+VjdQ=
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github.com/superseriousbusiness/activity v1.4.0-gts/go.mod h1:AZw0Xb4Oju8rmaJCZ21gc5CPg47MmNgyac+Hx5jo8VM=
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github.com/superseriousbusiness/exif-terminator v0.5.0 h1:57SO/geyaOl2v/lJSQLVcQbdghpyFuK8ZTtaHL81fUQ=
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github.com/superseriousbusiness/exif-terminator v0.5.0/go.mod h1:d5IkskXco/3XRXzOrI73uGYn+wahJEqPlQSSqn6jxSw=
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github.com/superseriousbusiness/exif-terminator v0.6.0 h1:f8FM4R/Au7iB0PGfSKjKAEYMGvM2HHbd1qLxrfmuNFk=
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github.com/superseriousbusiness/exif-terminator v0.6.0/go.mod h1:HjbpsIyuK6PguA/Rla+Hz0+A9pF6iWf9qGLhqpAN68k=
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github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe h1:ksl2oCx/Qo8sNDc3Grb8WGKBM9nkvhCm25uvlT86azE=
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github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe/go.mod h1:gH4P6gN1V+wmIw5o97KGaa1RgXB/tVpC2UNzijhg3E4=
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github.com/superseriousbusiness/go-png-image-structure/v2 v2.0.1-SSB h1:8psprYSK1KdOSH7yQ4PbJq0YYaGQY+gzdW/B0ExDb/8=
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github.com/superseriousbusiness/go-png-image-structure/v2 v2.0.1-SSB/go.mod h1:ymKGfy9kg4dIdraeZRAdobMS/flzLk3VcRPLpEWOAXg=
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github.com/superseriousbusiness/oauth2/v4 v4.3.2-SSB.0.20230227143000-f4900831d6c8 h1:nTIhuP157oOFcscuoK1kCme1xTeGIzztSw70lX9NrDQ=
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github.com/superseriousbusiness/oauth2/v4 v4.3.2-SSB.0.20230227143000-f4900831d6c8/go.mod h1:uYC/W92oVRJ49Vh1GcvTqpeFqHi+Ovrl2sMllQWRAEo=
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github.com/tdewolff/minify/v2 v2.20.7 h1:NUkuzJ9dvQUNJjSdmmrfELa/ZpnMdyMR/ZKU2bw7N/E=
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@ -53,8 +53,7 @@ type Manager struct {
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// NewManager returns a media manager with given state.
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func NewManager(state *state.State) *Manager {
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m := &Manager{state: state}
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return m
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return &Manager{state: state}
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}
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// PreProcessMedia begins the process of decoding
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@ -404,7 +404,7 @@ func (suite *ManagerTestSuite) TestSimpleJpegProcessPartial() {
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// Since we're cutting off the byte stream
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// halfway through, we should get an error here.
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suite.EqualError(err, "finish: error decoding image: unexpected EOF")
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suite.EqualError(err, "store: error writing media to storage: scan-data is unbounded; EOI not encountered before EOF")
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suite.NotNil(attachment)
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// make sure it's got the stuff set on it that we expect
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@ -29,7 +29,7 @@
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"codeberg.org/gruf/go-runners"
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"github.com/disintegration/imaging"
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"github.com/h2non/filetype"
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terminator "github.com/superseriousbusiness/exif-terminator"
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"github.com/superseriousbusiness/exif-terminator"
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"github.com/superseriousbusiness/gotosocial/internal/gtserror"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/log"
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Binary file not shown.
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Before Width: | Height: | Size: 18 KiB After Width: | Height: | Size: 18 KiB |
87
vendor/github.com/dsoprea/go-png-image-structure/v2/chunk_decoder.go
generated
vendored
87
vendor/github.com/dsoprea/go-png-image-structure/v2/chunk_decoder.go
generated
vendored
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@ -1,87 +0,0 @@
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package pngstructure
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import (
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"bytes"
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"fmt"
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"encoding/binary"
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"github.com/dsoprea/go-logging"
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)
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type ChunkDecoder struct {
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}
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func NewChunkDecoder() *ChunkDecoder {
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return new(ChunkDecoder)
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}
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func (cd *ChunkDecoder) Decode(c *Chunk) (decoded interface{}, err error) {
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defer func() {
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if state := recover(); state != nil {
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err := log.Wrap(state.(error))
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log.Panic(err)
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}
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}()
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switch c.Type {
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case "IHDR":
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ihdr, err := cd.decodeIHDR(c)
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log.PanicIf(err)
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return ihdr, nil
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}
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// We don't decode this particular type.
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return nil, nil
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}
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type ChunkIHDR struct {
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Width uint32
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Height uint32
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BitDepth uint8
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ColorType uint8
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CompressionMethod uint8
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FilterMethod uint8
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InterlaceMethod uint8
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}
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func (ihdr *ChunkIHDR) String() string {
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return fmt.Sprintf("IHDR<WIDTH=(%d) HEIGHT=(%d) DEPTH=(%d) COLOR-TYPE=(%d) COMP-METHOD=(%d) FILTER-METHOD=(%d) INTRLC-METHOD=(%d)>", ihdr.Width, ihdr.Height, ihdr.BitDepth, ihdr.ColorType, ihdr.CompressionMethod, ihdr.FilterMethod, ihdr.InterlaceMethod)
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}
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func (cd *ChunkDecoder) decodeIHDR(c *Chunk) (ihdr *ChunkIHDR, err error) {
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defer func() {
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if state := recover(); state != nil {
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err := log.Wrap(state.(error))
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log.Panic(err)
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}
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}()
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b := bytes.NewBuffer(c.Data)
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ihdr = new(ChunkIHDR)
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err = binary.Read(b, binary.BigEndian, &ihdr.Width)
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log.PanicIf(err)
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err = binary.Read(b, binary.BigEndian, &ihdr.Height)
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log.PanicIf(err)
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err = binary.Read(b, binary.BigEndian, &ihdr.BitDepth)
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log.PanicIf(err)
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err = binary.Read(b, binary.BigEndian, &ihdr.ColorType)
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log.PanicIf(err)
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err = binary.Read(b, binary.BigEndian, &ihdr.CompressionMethod)
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log.PanicIf(err)
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err = binary.Read(b, binary.BigEndian, &ihdr.FilterMethod)
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log.PanicIf(err)
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err = binary.Read(b, binary.BigEndian, &ihdr.InterlaceMethod)
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log.PanicIf(err)
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return ihdr, nil
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}
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118
vendor/github.com/dsoprea/go-png-image-structure/v2/media_parser.go
generated
vendored
118
vendor/github.com/dsoprea/go-png-image-structure/v2/media_parser.go
generated
vendored
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@ -1,118 +0,0 @@
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package pngstructure
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import (
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"bufio"
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"bytes"
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"image"
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"io"
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"os"
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"image/png"
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"github.com/dsoprea/go-logging"
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"github.com/dsoprea/go-utility/v2/image"
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)
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// PngMediaParser knows how to parse a PNG stream.
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type PngMediaParser struct {
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}
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// NewPngMediaParser returns a new `PngMediaParser` struct.
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func NewPngMediaParser() *PngMediaParser {
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// TODO(dustin): Add test
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return new(PngMediaParser)
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}
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// Parse parses a PNG stream given a `io.ReadSeeker`.
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func (pmp *PngMediaParser) Parse(rs io.ReadSeeker, size int) (mc riimage.MediaContext, err error) {
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defer func() {
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if state := recover(); state != nil {
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err = log.Wrap(state.(error))
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}
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}()
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// TODO(dustin): Add test
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ps := NewPngSplitter()
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err = ps.readHeader(rs)
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log.PanicIf(err)
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s := bufio.NewScanner(rs)
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// Since each segment can be any size, our buffer must be allowed to grow
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// as large as the file.
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buffer := []byte{}
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s.Buffer(buffer, size)
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s.Split(ps.Split)
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for s.Scan() != false {
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}
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log.PanicIf(s.Err())
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return ps.Chunks(), nil
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}
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|
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// ParseFile parses a PNG stream given a file-path.
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func (pmp *PngMediaParser) ParseFile(filepath string) (mc riimage.MediaContext, err error) {
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defer func() {
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if state := recover(); state != nil {
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err = log.Wrap(state.(error))
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}
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}()
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|
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f, err := os.Open(filepath)
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log.PanicIf(err)
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defer f.Close()
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|
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stat, err := f.Stat()
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log.PanicIf(err)
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size := stat.Size()
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chunks, err := pmp.Parse(f, int(size))
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log.PanicIf(err)
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|
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return chunks, nil
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}
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|
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// ParseBytes parses a PNG stream given a byte-slice.
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func (pmp *PngMediaParser) ParseBytes(data []byte) (mc riimage.MediaContext, err error) {
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defer func() {
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if state := recover(); state != nil {
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err = log.Wrap(state.(error))
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}
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}()
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|
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// TODO(dustin): Add test
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|
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br := bytes.NewReader(data)
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|
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chunks, err := pmp.Parse(br, len(data))
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log.PanicIf(err)
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|
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return chunks, nil
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}
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|
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// LooksLikeFormat returns a boolean indicating whether the stream looks like a
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// PNG image.
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func (pmp *PngMediaParser) LooksLikeFormat(data []byte) bool {
|
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return bytes.Compare(data[:len(PngSignature)], PngSignature[:]) == 0
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}
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|
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// GetImage returns an image.Image-compatible struct.
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func (pmp *PngMediaParser) GetImage(r io.Reader) (img image.Image, err error) {
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img, err = png.Decode(r)
|
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log.PanicIf(err)
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|
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return img, nil
|
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}
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|
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var (
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// Enforce interface conformance.
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_ riimage.MediaParser = new(PngMediaParser)
|
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)
|
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416
vendor/github.com/dsoprea/go-png-image-structure/v2/png.go
generated
vendored
416
vendor/github.com/dsoprea/go-png-image-structure/v2/png.go
generated
vendored
|
|
@ -1,416 +0,0 @@
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package pngstructure
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|
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import (
|
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"bytes"
|
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"errors"
|
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"fmt"
|
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"io"
|
||||
|
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"encoding/binary"
|
||||
"hash/crc32"
|
||||
|
||||
"github.com/dsoprea/go-exif/v3"
|
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"github.com/dsoprea/go-exif/v3/common"
|
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"github.com/dsoprea/go-logging"
|
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"github.com/dsoprea/go-utility/v2/image"
|
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)
|
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|
||||
var (
|
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PngSignature = [8]byte{137, 'P', 'N', 'G', '\r', '\n', 26, '\n'}
|
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EXifChunkType = "eXIf"
|
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IHDRChunkType = "IHDR"
|
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)
|
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|
||||
var (
|
||||
ErrNotPng = errors.New("not png data")
|
||||
ErrCrcFailure = errors.New("crc failure")
|
||||
)
|
||||
|
||||
// ChunkSlice encapsulates a slice of chunks.
|
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type ChunkSlice struct {
|
||||
chunks []*Chunk
|
||||
}
|
||||
|
||||
func NewChunkSlice(chunks []*Chunk) *ChunkSlice {
|
||||
if len(chunks) == 0 {
|
||||
log.Panicf("ChunkSlice must be initialized with at least one chunk (IHDR)")
|
||||
} else if chunks[0].Type != IHDRChunkType {
|
||||
log.Panicf("first chunk in any ChunkSlice must be an IHDR")
|
||||
}
|
||||
|
||||
return &ChunkSlice{
|
||||
chunks: chunks,
|
||||
}
|
||||
}
|
||||
|
||||
func NewPngChunkSlice() *ChunkSlice {
|
||||
|
||||
ihdrChunk := &Chunk{
|
||||
Type: IHDRChunkType,
|
||||
}
|
||||
|
||||
ihdrChunk.UpdateCrc32()
|
||||
|
||||
return NewChunkSlice([]*Chunk{ihdrChunk})
|
||||
}
|
||||
|
||||
func (cs *ChunkSlice) String() string {
|
||||
return fmt.Sprintf("ChunkSlize<LEN=(%d)>", len(cs.chunks))
|
||||
}
|
||||
|
||||
// Chunks exposes the actual slice.
|
||||
func (cs *ChunkSlice) Chunks() []*Chunk {
|
||||
return cs.chunks
|
||||
}
|
||||
|
||||
// Write encodes and writes all chunks.
|
||||
func (cs *ChunkSlice) WriteTo(w io.Writer) (err error) {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err = log.Wrap(state.(error))
|
||||
}
|
||||
}()
|
||||
|
||||
_, err = w.Write(PngSignature[:])
|
||||
log.PanicIf(err)
|
||||
|
||||
// TODO(dustin): !! This should respect the safe-to-copy characteristic.
|
||||
for _, c := range cs.chunks {
|
||||
_, err := c.WriteTo(w)
|
||||
log.PanicIf(err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Index returns a map of chunk types to chunk slices, grouping all like chunks.
|
||||
func (cs *ChunkSlice) Index() (index map[string][]*Chunk) {
|
||||
index = make(map[string][]*Chunk)
|
||||
for _, c := range cs.chunks {
|
||||
if grouped, found := index[c.Type]; found == true {
|
||||
index[c.Type] = append(grouped, c)
|
||||
} else {
|
||||
index[c.Type] = []*Chunk{c}
|
||||
}
|
||||
}
|
||||
|
||||
return index
|
||||
}
|
||||
|
||||
// FindExif returns the the segment that hosts the EXIF data.
|
||||
func (cs *ChunkSlice) FindExif() (chunk *Chunk, err error) {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err = log.Wrap(state.(error))
|
||||
}
|
||||
}()
|
||||
|
||||
index := cs.Index()
|
||||
|
||||
if chunks, found := index[EXifChunkType]; found == true {
|
||||
return chunks[0], nil
|
||||
}
|
||||
|
||||
log.Panic(exif.ErrNoExif)
|
||||
|
||||
// Never called.
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
// Exif returns an `exif.Ifd` instance with the existing tags.
|
||||
func (cs *ChunkSlice) Exif() (rootIfd *exif.Ifd, data []byte, err error) {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err = log.Wrap(state.(error))
|
||||
}
|
||||
}()
|
||||
|
||||
chunk, err := cs.FindExif()
|
||||
log.PanicIf(err)
|
||||
|
||||
im, err := exifcommon.NewIfdMappingWithStandard()
|
||||
log.PanicIf(err)
|
||||
|
||||
ti := exif.NewTagIndex()
|
||||
|
||||
// TODO(dustin): Refactor and support `exif.GetExifData()`.
|
||||
|
||||
_, index, err := exif.Collect(im, ti, chunk.Data)
|
||||
log.PanicIf(err)
|
||||
|
||||
return index.RootIfd, chunk.Data, nil
|
||||
}
|
||||
|
||||
// ConstructExifBuilder returns an `exif.IfdBuilder` instance (needed for
|
||||
// modifying) preloaded with all existing tags.
|
||||
func (cs *ChunkSlice) ConstructExifBuilder() (rootIb *exif.IfdBuilder, err error) {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err = log.Wrap(state.(error))
|
||||
}
|
||||
}()
|
||||
|
||||
rootIfd, _, err := cs.Exif()
|
||||
log.PanicIf(err)
|
||||
|
||||
ib := exif.NewIfdBuilderFromExistingChain(rootIfd)
|
||||
|
||||
return ib, nil
|
||||
}
|
||||
|
||||
// SetExif encodes and sets EXIF data into this segment.
|
||||
func (cs *ChunkSlice) SetExif(ib *exif.IfdBuilder) (err error) {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err = log.Wrap(state.(error))
|
||||
}
|
||||
}()
|
||||
|
||||
// Encode.
|
||||
|
||||
ibe := exif.NewIfdByteEncoder()
|
||||
|
||||
exifData, err := ibe.EncodeToExif(ib)
|
||||
log.PanicIf(err)
|
||||
|
||||
// Set.
|
||||
|
||||
exifChunk, err := cs.FindExif()
|
||||
if err == nil {
|
||||
// EXIF chunk already exists.
|
||||
|
||||
exifChunk.Data = exifData
|
||||
exifChunk.Length = uint32(len(exifData))
|
||||
} else {
|
||||
if log.Is(err, exif.ErrNoExif) != true {
|
||||
log.Panic(err)
|
||||
}
|
||||
|
||||
// Add a EXIF chunk for the first time.
|
||||
|
||||
exifChunk = &Chunk{
|
||||
Type: EXifChunkType,
|
||||
Data: exifData,
|
||||
Length: uint32(len(exifData)),
|
||||
}
|
||||
|
||||
// Insert it after the IHDR chunk (it's a reliably appropriate place to
|
||||
// put it).
|
||||
cs.chunks = append(cs.chunks[:1], append([]*Chunk{exifChunk}, cs.chunks[1:]...)...)
|
||||
}
|
||||
|
||||
exifChunk.UpdateCrc32()
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// PngSplitter hosts the princpal `Split()` method uses by `bufio.Scanner`.
|
||||
type PngSplitter struct {
|
||||
chunks []*Chunk
|
||||
currentOffset int
|
||||
|
||||
doCheckCrc bool
|
||||
crcErrors []string
|
||||
}
|
||||
|
||||
func (ps *PngSplitter) Chunks() *ChunkSlice {
|
||||
return NewChunkSlice(ps.chunks)
|
||||
}
|
||||
|
||||
func (ps *PngSplitter) DoCheckCrc(doCheck bool) {
|
||||
ps.doCheckCrc = doCheck
|
||||
}
|
||||
|
||||
func (ps *PngSplitter) CrcErrors() []string {
|
||||
return ps.crcErrors
|
||||
}
|
||||
|
||||
func NewPngSplitter() *PngSplitter {
|
||||
return &PngSplitter{
|
||||
chunks: make([]*Chunk, 0),
|
||||
doCheckCrc: true,
|
||||
crcErrors: make([]string, 0),
|
||||
}
|
||||
}
|
||||
|
||||
// Chunk describes a single chunk.
|
||||
type Chunk struct {
|
||||
Offset int
|
||||
Length uint32
|
||||
Type string
|
||||
Data []byte
|
||||
Crc uint32
|
||||
}
|
||||
|
||||
func (c *Chunk) String() string {
|
||||
return fmt.Sprintf("Chunk<OFFSET=(%d) LENGTH=(%d) TYPE=[%s] CRC=(%d)>", c.Offset, c.Length, c.Type, c.Crc)
|
||||
}
|
||||
|
||||
func calculateCrc32(chunk *Chunk) uint32 {
|
||||
c := crc32.NewIEEE()
|
||||
|
||||
c.Write([]byte(chunk.Type))
|
||||
c.Write(chunk.Data)
|
||||
|
||||
return c.Sum32()
|
||||
}
|
||||
|
||||
func (c *Chunk) UpdateCrc32() {
|
||||
c.Crc = calculateCrc32(c)
|
||||
}
|
||||
|
||||
func (c *Chunk) CheckCrc32() bool {
|
||||
expected := calculateCrc32(c)
|
||||
return c.Crc == expected
|
||||
}
|
||||
|
||||
// Bytes encodes and returns the bytes for this chunk.
|
||||
func (c *Chunk) Bytes() []byte {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err := log.Wrap(state.(error))
|
||||
log.Panic(err)
|
||||
}
|
||||
}()
|
||||
|
||||
if len(c.Data) != int(c.Length) {
|
||||
log.Panicf("length of data not correct")
|
||||
}
|
||||
|
||||
preallocated := make([]byte, 0, 4+4+c.Length+4)
|
||||
b := bytes.NewBuffer(preallocated)
|
||||
|
||||
err := binary.Write(b, binary.BigEndian, c.Length)
|
||||
log.PanicIf(err)
|
||||
|
||||
_, err = b.Write([]byte(c.Type))
|
||||
log.PanicIf(err)
|
||||
|
||||
if c.Data != nil {
|
||||
_, err = b.Write(c.Data)
|
||||
log.PanicIf(err)
|
||||
}
|
||||
|
||||
err = binary.Write(b, binary.BigEndian, c.Crc)
|
||||
log.PanicIf(err)
|
||||
|
||||
return b.Bytes()
|
||||
}
|
||||
|
||||
// Write encodes and writes the bytes for this chunk.
|
||||
func (c *Chunk) WriteTo(w io.Writer) (count int, err error) {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err = log.Wrap(state.(error))
|
||||
}
|
||||
}()
|
||||
|
||||
if len(c.Data) != int(c.Length) {
|
||||
log.Panicf("length of data not correct")
|
||||
}
|
||||
|
||||
err = binary.Write(w, binary.BigEndian, c.Length)
|
||||
log.PanicIf(err)
|
||||
|
||||
_, err = w.Write([]byte(c.Type))
|
||||
log.PanicIf(err)
|
||||
|
||||
_, err = w.Write(c.Data)
|
||||
log.PanicIf(err)
|
||||
|
||||
err = binary.Write(w, binary.BigEndian, c.Crc)
|
||||
log.PanicIf(err)
|
||||
|
||||
return 4 + len(c.Type) + len(c.Data) + 4, nil
|
||||
}
|
||||
|
||||
// readHeader verifies that the PNG header bytes appear next.
|
||||
func (ps *PngSplitter) readHeader(r io.Reader) (err error) {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err = log.Wrap(state.(error))
|
||||
}
|
||||
}()
|
||||
|
||||
len_ := len(PngSignature)
|
||||
header := make([]byte, len_)
|
||||
|
||||
_, err = r.Read(header)
|
||||
log.PanicIf(err)
|
||||
|
||||
ps.currentOffset += len_
|
||||
|
||||
if bytes.Compare(header, PngSignature[:]) != 0 {
|
||||
log.Panic(ErrNotPng)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Split fulfills the `bufio.SplitFunc` function definition for
|
||||
// `bufio.Scanner`.
|
||||
func (ps *PngSplitter) Split(data []byte, atEOF bool) (advance int, token []byte, err error) {
|
||||
defer func() {
|
||||
if state := recover(); state != nil {
|
||||
err = log.Wrap(state.(error))
|
||||
}
|
||||
}()
|
||||
|
||||
// We might have more than one chunk's worth, and, if `atEOF` is true, we
|
||||
// won't be called again. We'll repeatedly try to read additional chunks,
|
||||
// but, when we run out of the data we were given then we'll return the
|
||||
// number of bytes fo rthe chunks we've already completely read. Then,
|
||||
// we'll be called again from theend ofthose bytes, at which point we'll
|
||||
// indicate that we don't yet have enough for another chunk, and we should
|
||||
// be then called with more.
|
||||
for {
|
||||
len_ := len(data)
|
||||
if len_ < 8 {
|
||||
return advance, nil, nil
|
||||
}
|
||||
|
||||
length := binary.BigEndian.Uint32(data[:4])
|
||||
type_ := string(data[4:8])
|
||||
chunkSize := (8 + int(length) + 4)
|
||||
|
||||
if len_ < chunkSize {
|
||||
return advance, nil, nil
|
||||
}
|
||||
|
||||
crcIndex := 8 + length
|
||||
crc := binary.BigEndian.Uint32(data[crcIndex : crcIndex+4])
|
||||
|
||||
content := make([]byte, length)
|
||||
copy(content, data[8:8+length])
|
||||
|
||||
c := &Chunk{
|
||||
Length: length,
|
||||
Type: type_,
|
||||
Data: content,
|
||||
Crc: crc,
|
||||
Offset: ps.currentOffset,
|
||||
}
|
||||
|
||||
ps.chunks = append(ps.chunks, c)
|
||||
|
||||
if c.CheckCrc32() == false {
|
||||
ps.crcErrors = append(ps.crcErrors, type_)
|
||||
|
||||
if ps.doCheckCrc == true {
|
||||
log.Panic(ErrCrcFailure)
|
||||
}
|
||||
}
|
||||
|
||||
advance += chunkSize
|
||||
ps.currentOffset += chunkSize
|
||||
|
||||
data = data[chunkSize:]
|
||||
}
|
||||
|
||||
return advance, nil, nil
|
||||
}
|
||||
|
||||
var (
|
||||
// Enforce interface conformance.
|
||||
_ riimage.MediaContext = new(ChunkSlice)
|
||||
)
|
||||
64
vendor/github.com/dsoprea/go-png-image-structure/v2/testing_common.go
generated
vendored
64
vendor/github.com/dsoprea/go-png-image-structure/v2/testing_common.go
generated
vendored
|
|
@ -1,64 +0,0 @@
|
|||
package pngstructure
|
||||
|
||||
import (
|
||||
"os"
|
||||
"path"
|
||||
|
||||
"github.com/dsoprea/go-logging"
|
||||
)
|
||||
|
||||
var (
|
||||
assetsPath = ""
|
||||
)
|
||||
|
||||
func getModuleRootPath() string {
|
||||
moduleRootPath := os.Getenv("PNG_MODULE_ROOT_PATH")
|
||||
if moduleRootPath != "" {
|
||||
return moduleRootPath
|
||||
}
|
||||
|
||||
currentWd, err := os.Getwd()
|
||||
log.PanicIf(err)
|
||||
|
||||
currentPath := currentWd
|
||||
visited := make([]string, 0)
|
||||
|
||||
for {
|
||||
tryStampFilepath := path.Join(currentPath, ".MODULE_ROOT")
|
||||
|
||||
_, err := os.Stat(tryStampFilepath)
|
||||
if err != nil && os.IsNotExist(err) != true {
|
||||
log.Panic(err)
|
||||
} else if err == nil {
|
||||
break
|
||||
}
|
||||
|
||||
visited = append(visited, tryStampFilepath)
|
||||
|
||||
currentPath = path.Dir(currentPath)
|
||||
if currentPath == "/" {
|
||||
log.Panicf("could not find module-root: %v", visited)
|
||||
}
|
||||
}
|
||||
|
||||
return currentPath
|
||||
}
|
||||
|
||||
func getTestAssetsPath() string {
|
||||
if assetsPath == "" {
|
||||
moduleRootPath := getModuleRootPath()
|
||||
assetsPath = path.Join(moduleRootPath, "assets")
|
||||
}
|
||||
|
||||
return assetsPath
|
||||
}
|
||||
|
||||
func getTestBasicImageFilepath() string {
|
||||
assetsPath := getTestAssetsPath()
|
||||
return path.Join(assetsPath, "libpng.png")
|
||||
}
|
||||
|
||||
func getTestExifImageFilepath() string {
|
||||
assetsPath := getTestAssetsPath()
|
||||
return path.Join(assetsPath, "exif.png")
|
||||
}
|
||||
47
vendor/github.com/superseriousbusiness/exif-terminator/logger.go
generated
vendored
47
vendor/github.com/superseriousbusiness/exif-terminator/logger.go
generated
vendored
|
|
@ -1,47 +0,0 @@
|
|||
/*
|
||||
exif-terminator
|
||||
Copyright (C) 2022 SuperSeriousBusiness 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 terminator
|
||||
|
||||
import "fmt"
|
||||
|
||||
var logger ErrorLogger
|
||||
|
||||
func init() {
|
||||
logger = &defaultErrorLogger{}
|
||||
}
|
||||
|
||||
// ErrorLogger denotes a generic error logging function.
|
||||
type ErrorLogger interface {
|
||||
Error(args ...interface{})
|
||||
}
|
||||
|
||||
type defaultErrorLogger struct{}
|
||||
|
||||
func (d *defaultErrorLogger) Error(args ...interface{}) {
|
||||
fmt.Println(args...)
|
||||
}
|
||||
|
||||
// SetErrorLogger allows a user of the exif-terminator library
|
||||
// to set the logger that will be used for error logging.
|
||||
//
|
||||
// If it is not set, the default error logger will be used, which
|
||||
// just prints errors to stdout.
|
||||
func SetErrorLogger(errorLogger ErrorLogger) {
|
||||
logger = errorLogger
|
||||
}
|
||||
68
vendor/github.com/superseriousbusiness/exif-terminator/png.go
generated
vendored
68
vendor/github.com/superseriousbusiness/exif-terminator/png.go
generated
vendored
|
|
@ -19,10 +19,9 @@
|
|||
package terminator
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"io"
|
||||
|
||||
pngstructure "github.com/dsoprea/go-png-image-structure/v2"
|
||||
pngstructure "github.com/superseriousbusiness/go-png-image-structure/v2"
|
||||
)
|
||||
|
||||
type pngVisitor struct {
|
||||
|
|
@ -45,49 +44,50 @@ func (v *pngVisitor) split(data []byte, atEOF bool) (int, []byte, error) {
|
|||
}
|
||||
}
|
||||
|
||||
// check if the splitter has any new chunks in it that we haven't written yet
|
||||
chunkSlice := v.ps.Chunks()
|
||||
// Check if the splitter now has
|
||||
// any new chunks in it for us.
|
||||
chunkSlice, err := v.ps.Chunks()
|
||||
if err != nil {
|
||||
return advance, token, err
|
||||
}
|
||||
|
||||
// Write each chunk by passing it
|
||||
// through our custom write func,
|
||||
// which strips out exif and fixes
|
||||
// the CRC of each chunk.
|
||||
chunks := chunkSlice.Chunks()
|
||||
for i, chunk := range chunks {
|
||||
// look through all the chunks in the splitter
|
||||
if i > v.lastWrittenChunk {
|
||||
// we've got a chunk we haven't written yet! write it...
|
||||
if err := v.writeChunk(chunk); err != nil {
|
||||
return advance, token, err
|
||||
}
|
||||
// then remove the data
|
||||
chunk.Data = chunk.Data[:0]
|
||||
// and update
|
||||
v.lastWrittenChunk = i
|
||||
if i <= v.lastWrittenChunk {
|
||||
// Skip already
|
||||
// written chunks.
|
||||
continue
|
||||
}
|
||||
|
||||
// Write this new chunk.
|
||||
if err := v.writeChunk(chunk); err != nil {
|
||||
return advance, token, err
|
||||
}
|
||||
v.lastWrittenChunk = i
|
||||
|
||||
// Zero data; here you
|
||||
// go garbage collector.
|
||||
chunk.Data = nil
|
||||
}
|
||||
|
||||
return advance, token, err
|
||||
}
|
||||
|
||||
func (v *pngVisitor) writeChunk(chunk *pngstructure.Chunk) error {
|
||||
if err := binary.Write(v.writer, binary.BigEndian, chunk.Length); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if _, err := v.writer.Write([]byte(chunk.Type)); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if chunk.Type == pngstructure.EXifChunkType {
|
||||
blank := make([]byte, len(chunk.Data))
|
||||
if _, err := v.writer.Write(blank); err != nil {
|
||||
return err
|
||||
}
|
||||
} else {
|
||||
if _, err := v.writer.Write(chunk.Data); err != nil {
|
||||
return err
|
||||
}
|
||||
// Replace exif data
|
||||
// with zero bytes.
|
||||
clear(chunk.Data)
|
||||
}
|
||||
|
||||
if err := binary.Write(v.writer, binary.BigEndian, chunk.Crc); err != nil {
|
||||
return err
|
||||
}
|
||||
// Fix CRC of each chunk.
|
||||
chunk.UpdateCrc32()
|
||||
|
||||
return nil
|
||||
// finally, write chunk to writer.
|
||||
_, err := chunk.WriteTo(v.writer)
|
||||
return err
|
||||
}
|
||||
|
|
|
|||
94
vendor/github.com/superseriousbusiness/exif-terminator/terminator.go
generated
vendored
94
vendor/github.com/superseriousbusiness/exif-terminator/terminator.go
generated
vendored
|
|
@ -25,29 +25,34 @@
|
|||
"fmt"
|
||||
"io"
|
||||
|
||||
pngstructure "github.com/dsoprea/go-png-image-structure/v2"
|
||||
jpegstructure "github.com/superseriousbusiness/go-jpeg-image-structure/v2"
|
||||
pngstructure "github.com/superseriousbusiness/go-png-image-structure/v2"
|
||||
)
|
||||
|
||||
func Terminate(in io.Reader, fileSize int, mediaType string) (io.Reader, error) {
|
||||
// to avoid keeping too much stuff in memory we want to pipe data directly
|
||||
// To avoid keeping too much stuff
|
||||
// in memory we want to pipe data
|
||||
// directly to the reader.
|
||||
pipeReader, pipeWriter := io.Pipe()
|
||||
|
||||
// we don't know ahead of time how long segments might be: they could be as large as
|
||||
// the file itself, so unfortunately we need to allocate a buffer here that'scanner as large
|
||||
// as the file
|
||||
// We don't know ahead of time how long
|
||||
// segments might be: they could be as
|
||||
// large as the file itself, so we need
|
||||
// a buffer with generous overhead.
|
||||
scanner := bufio.NewScanner(in)
|
||||
scanner.Buffer([]byte{}, fileSize)
|
||||
var err error
|
||||
|
||||
var err error
|
||||
switch mediaType {
|
||||
case "image/jpeg", "jpeg", "jpg":
|
||||
err = terminateJpeg(scanner, pipeWriter, fileSize)
|
||||
|
||||
case "image/webp", "webp":
|
||||
err = terminateWebp(scanner, pipeWriter)
|
||||
|
||||
case "image/png", "png":
|
||||
// for pngs we need to skip the header bytes, so read them in
|
||||
// and check we're really dealing with a png here
|
||||
// For pngs we need to skip the header bytes, so read
|
||||
// them in and check we're really dealing with a png.
|
||||
header := make([]byte, len(pngstructure.PngSignature))
|
||||
if _, headerError := in.Read(header); headerError != nil {
|
||||
err = headerError
|
||||
|
|
@ -67,68 +72,87 @@ func Terminate(in io.Reader, fileSize int, mediaType string) (io.Reader, error)
|
|||
return pipeReader, err
|
||||
}
|
||||
|
||||
func terminateJpeg(scanner *bufio.Scanner, writer io.WriteCloser, expectedFileSize int) error {
|
||||
// jpeg visitor is where the spicy hack of streaming the de-exifed data is contained
|
||||
func terminateJpeg(scanner *bufio.Scanner, writer *io.PipeWriter, expectedFileSize int) error {
|
||||
v := &jpegVisitor{
|
||||
writer: writer,
|
||||
expectedFileSize: expectedFileSize,
|
||||
}
|
||||
|
||||
// provide the visitor to the splitter so that it triggers on every section scan
|
||||
// Provide the visitor to the splitter so
|
||||
// that it triggers on every section scan.
|
||||
js := jpegstructure.NewJpegSplitter(v)
|
||||
|
||||
// the visitor also needs to read back the list of segments: for this it needs
|
||||
// to know what jpeg splitter it's attached to, so give it a pointer to the splitter
|
||||
// The visitor also needs to read back the
|
||||
// list of segments: for this it needs to
|
||||
// know what jpeg splitter it's attached to,
|
||||
// so give it a pointer to the splitter.
|
||||
v.js = js
|
||||
|
||||
// use the jpeg splitters 'split' function, which satisfies the bufio.SplitFunc interface
|
||||
// Jpeg visitor's 'split' function
|
||||
// satisfies bufio.SplitFunc{}.
|
||||
scanner.Split(js.Split)
|
||||
|
||||
scanAndClose(scanner, writer)
|
||||
go scanAndClose(scanner, writer)
|
||||
return nil
|
||||
}
|
||||
|
||||
func terminateWebp(scanner *bufio.Scanner, writer io.WriteCloser) error {
|
||||
func terminateWebp(scanner *bufio.Scanner, writer *io.PipeWriter) error {
|
||||
v := &webpVisitor{
|
||||
writer: writer,
|
||||
}
|
||||
|
||||
// use the webp visitor's 'split' function, which satisfies the bufio.SplitFunc interface
|
||||
// Webp visitor's 'split' function
|
||||
// satisfies bufio.SplitFunc{}.
|
||||
scanner.Split(v.split)
|
||||
|
||||
scanAndClose(scanner, writer)
|
||||
go scanAndClose(scanner, writer)
|
||||
return nil
|
||||
}
|
||||
|
||||
func terminatePng(scanner *bufio.Scanner, writer io.WriteCloser) error {
|
||||
func terminatePng(scanner *bufio.Scanner, writer *io.PipeWriter) error {
|
||||
ps := pngstructure.NewPngSplitter()
|
||||
|
||||
// Don't bother checking CRC;
|
||||
// we're overwriting it anyway.
|
||||
ps.DoCheckCrc(false)
|
||||
|
||||
v := &pngVisitor{
|
||||
ps: ps,
|
||||
writer: writer,
|
||||
lastWrittenChunk: -1,
|
||||
}
|
||||
|
||||
// use the png visitor's 'split' function, which satisfies the bufio.SplitFunc interface
|
||||
// Png visitor's 'split' function
|
||||
// satisfies bufio.SplitFunc{}.
|
||||
scanner.Split(v.split)
|
||||
|
||||
scanAndClose(scanner, writer)
|
||||
go scanAndClose(scanner, writer)
|
||||
return nil
|
||||
}
|
||||
|
||||
func scanAndClose(scanner *bufio.Scanner, writer io.WriteCloser) {
|
||||
// scan asynchronously until there's nothing left to scan, and then close the writer
|
||||
// so that the reader on the other side knows that we're done
|
||||
//
|
||||
// due to the nature of io.Pipe, writing won't actually work
|
||||
// until the pipeReader starts being read by the caller, which
|
||||
// is why we do this asynchronously
|
||||
go func() {
|
||||
defer writer.Close()
|
||||
for scanner.Scan() {
|
||||
}
|
||||
if scanner.Err() != nil {
|
||||
logger.Error(scanner.Err())
|
||||
}
|
||||
// scanAndClose scans through the given scanner until there's
|
||||
// nothing left to scan, and then closes the writer so that the
|
||||
// reader on the other side of the pipe knows that we're done.
|
||||
//
|
||||
// Any error encountered when scanning will be logged by terminator.
|
||||
//
|
||||
// Due to the nature of io.Pipe, writing won't actually work
|
||||
// until the pipeReader starts being read by the caller, which
|
||||
// is why this function should always be called asynchronously.
|
||||
func scanAndClose(scanner *bufio.Scanner, writer *io.PipeWriter) {
|
||||
var err error
|
||||
|
||||
defer func() {
|
||||
// Always close writer, using returned
|
||||
// scanner error (if any). If err is nil
|
||||
// then the standard io.EOF will be used.
|
||||
// (this will not overwrite existing).
|
||||
writer.CloseWithError(err)
|
||||
}()
|
||||
|
||||
for scanner.Scan() {
|
||||
}
|
||||
|
||||
// Set error on return.
|
||||
err = scanner.Err()
|
||||
}
|
||||
|
|
|
|||
81
vendor/github.com/superseriousbusiness/go-png-image-structure/v2/chunk_decoder.go
generated
vendored
Normal file
81
vendor/github.com/superseriousbusiness/go-png-image-structure/v2/chunk_decoder.go
generated
vendored
Normal file
|
|
@ -0,0 +1,81 @@
|
|||
package pngstructure
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
|
||||
"encoding/binary"
|
||||
)
|
||||
|
||||
type ChunkDecoder struct {
|
||||
}
|
||||
|
||||
func NewChunkDecoder() *ChunkDecoder {
|
||||
return new(ChunkDecoder)
|
||||
}
|
||||
|
||||
func (cd *ChunkDecoder) Decode(c *Chunk) (decoded interface{}, err error) {
|
||||
switch c.Type {
|
||||
case "IHDR":
|
||||
return cd.decodeIHDR(c)
|
||||
}
|
||||
|
||||
// We don't decode this type.
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
type ChunkIHDR struct {
|
||||
Width uint32
|
||||
Height uint32
|
||||
BitDepth uint8
|
||||
ColorType uint8
|
||||
CompressionMethod uint8
|
||||
FilterMethod uint8
|
||||
InterlaceMethod uint8
|
||||
}
|
||||
|
||||
func (ihdr *ChunkIHDR) String() string {
|
||||
return fmt.Sprintf("IHDR<WIDTH=(%d) HEIGHT=(%d) DEPTH=(%d) COLOR-TYPE=(%d) COMP-METHOD=(%d) FILTER-METHOD=(%d) INTRLC-METHOD=(%d)>",
|
||||
ihdr.Width, ihdr.Height, ihdr.BitDepth, ihdr.ColorType, ihdr.CompressionMethod, ihdr.FilterMethod, ihdr.InterlaceMethod,
|
||||
)
|
||||
}
|
||||
|
||||
func (cd *ChunkDecoder) decodeIHDR(c *Chunk) (*ChunkIHDR, error) {
|
||||
var (
|
||||
b = bytes.NewBuffer(c.Data)
|
||||
ihdr = new(ChunkIHDR)
|
||||
readf = func(data interface{}) error {
|
||||
return binary.Read(b, binary.BigEndian, data)
|
||||
}
|
||||
)
|
||||
|
||||
if err := readf(&ihdr.Width); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := readf(&ihdr.Height); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := readf(&ihdr.BitDepth); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := readf(&ihdr.ColorType); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := readf(&ihdr.CompressionMethod); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := readf(&ihdr.FilterMethod); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if err := readf(&ihdr.InterlaceMethod); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return ihdr, nil
|
||||
}
|
||||
85
vendor/github.com/superseriousbusiness/go-png-image-structure/v2/media_parser.go
generated
vendored
Normal file
85
vendor/github.com/superseriousbusiness/go-png-image-structure/v2/media_parser.go
generated
vendored
Normal file
|
|
@ -0,0 +1,85 @@
|
|||
package pngstructure
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"bytes"
|
||||
"image"
|
||||
"io"
|
||||
"os"
|
||||
|
||||
"image/png"
|
||||
|
||||
riimage "github.com/dsoprea/go-utility/v2/image"
|
||||
)
|
||||
|
||||
// PngMediaParser knows how to parse a PNG stream.
|
||||
type PngMediaParser struct {
|
||||
}
|
||||
|
||||
// NewPngMediaParser returns a new `PngMediaParser`.
|
||||
func NewPngMediaParser() riimage.MediaParser {
|
||||
return new(PngMediaParser)
|
||||
}
|
||||
|
||||
// Parse parses a PNG stream given a `io.ReadSeeker`.
|
||||
func (pmp *PngMediaParser) Parse(
|
||||
rs io.ReadSeeker,
|
||||
size int,
|
||||
) (riimage.MediaContext, error) {
|
||||
ps := NewPngSplitter()
|
||||
if err := ps.readHeader(rs); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
s := bufio.NewScanner(rs)
|
||||
|
||||
// Since each segment can be any
|
||||
// size, our buffer must be allowed
|
||||
// to grow as large as the file.
|
||||
buffer := []byte{}
|
||||
s.Buffer(buffer, size)
|
||||
s.Split(ps.Split)
|
||||
|
||||
for s.Scan() {
|
||||
}
|
||||
|
||||
if err := s.Err(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return ps.Chunks()
|
||||
}
|
||||
|
||||
// ParseFile parses a PNG stream given a file-path.
|
||||
func (pmp *PngMediaParser) ParseFile(filepath string) (riimage.MediaContext, error) {
|
||||
f, err := os.Open(filepath)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer f.Close()
|
||||
|
||||
stat, err := f.Stat()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
size := stat.Size()
|
||||
return pmp.Parse(f, int(size))
|
||||
}
|
||||
|
||||
// ParseBytes parses a PNG stream given a byte-slice.
|
||||
func (pmp *PngMediaParser) ParseBytes(data []byte) (riimage.MediaContext, error) {
|
||||
br := bytes.NewReader(data)
|
||||
return pmp.Parse(br, len(data))
|
||||
}
|
||||
|
||||
// LooksLikeFormat returns a boolean indicating
|
||||
// whether the stream looks like a PNG image.
|
||||
func (pmp *PngMediaParser) LooksLikeFormat(data []byte) bool {
|
||||
return bytes.Equal(data[:len(PngSignature)], PngSignature[:])
|
||||
}
|
||||
|
||||
// GetImage returns an image.Image-compatible struct.
|
||||
func (pmp *PngMediaParser) GetImage(r io.Reader) (img image.Image, err error) {
|
||||
return png.Decode(r)
|
||||
}
|
||||
386
vendor/github.com/superseriousbusiness/go-png-image-structure/v2/png.go
generated
vendored
Normal file
386
vendor/github.com/superseriousbusiness/go-png-image-structure/v2/png.go
generated
vendored
Normal file
|
|
@ -0,0 +1,386 @@
|
|||
package pngstructure
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"errors"
|
||||
"fmt"
|
||||
"io"
|
||||
|
||||
"encoding/binary"
|
||||
"hash/crc32"
|
||||
|
||||
"github.com/dsoprea/go-exif/v3"
|
||||
exifcommon "github.com/dsoprea/go-exif/v3/common"
|
||||
riimage "github.com/dsoprea/go-utility/v2/image"
|
||||
)
|
||||
|
||||
var (
|
||||
PngSignature = [8]byte{137, 'P', 'N', 'G', '\r', '\n', 26, '\n'}
|
||||
EXifChunkType = "eXIf"
|
||||
IHDRChunkType = "IHDR"
|
||||
)
|
||||
|
||||
var (
|
||||
ErrNotPng = errors.New("not png data")
|
||||
ErrCrcFailure = errors.New("crc failure")
|
||||
)
|
||||
|
||||
// ChunkSlice encapsulates a slice of chunks.
|
||||
type ChunkSlice struct {
|
||||
chunks []*Chunk
|
||||
}
|
||||
|
||||
func NewChunkSlice(chunks []*Chunk) (*ChunkSlice, error) {
|
||||
if len(chunks) == 0 {
|
||||
err := errors.New("ChunkSlice must be initialized with at least one chunk (IHDR)")
|
||||
return nil, err
|
||||
} else if chunks[0].Type != IHDRChunkType {
|
||||
err := errors.New("first chunk in any ChunkSlice must be an IHDR")
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &ChunkSlice{chunks}, nil
|
||||
}
|
||||
|
||||
func NewPngChunkSlice() (*ChunkSlice, error) {
|
||||
ihdrChunk := &Chunk{
|
||||
Type: IHDRChunkType,
|
||||
}
|
||||
|
||||
ihdrChunk.UpdateCrc32()
|
||||
|
||||
return NewChunkSlice([]*Chunk{ihdrChunk})
|
||||
}
|
||||
|
||||
func (cs *ChunkSlice) String() string {
|
||||
return fmt.Sprintf("ChunkSlize<LEN=(%d)>", len(cs.chunks))
|
||||
}
|
||||
|
||||
// Chunks exposes the actual slice.
|
||||
func (cs *ChunkSlice) Chunks() []*Chunk {
|
||||
return cs.chunks
|
||||
}
|
||||
|
||||
// Write encodes and writes all chunks.
|
||||
func (cs *ChunkSlice) WriteTo(w io.Writer) error {
|
||||
if _, err := w.Write(PngSignature[:]); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// TODO(dustin): !! This should respect
|
||||
// the safe-to-copy characteristic.
|
||||
for _, c := range cs.chunks {
|
||||
if _, err := c.WriteTo(w); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Index returns a map of chunk types to chunk slices, grouping all like chunks.
|
||||
func (cs *ChunkSlice) Index() (index map[string][]*Chunk) {
|
||||
index = make(map[string][]*Chunk)
|
||||
for _, c := range cs.chunks {
|
||||
if grouped, found := index[c.Type]; found {
|
||||
index[c.Type] = append(grouped, c)
|
||||
} else {
|
||||
index[c.Type] = []*Chunk{c}
|
||||
}
|
||||
}
|
||||
|
||||
return index
|
||||
}
|
||||
|
||||
// FindExif returns the the segment that hosts the EXIF data.
|
||||
func (cs *ChunkSlice) FindExif() (chunk *Chunk, err error) {
|
||||
index := cs.Index()
|
||||
if chunks, found := index[EXifChunkType]; found {
|
||||
return chunks[0], nil
|
||||
}
|
||||
|
||||
return nil, exif.ErrNoExif
|
||||
}
|
||||
|
||||
// Exif returns an `exif.Ifd` instance with the existing tags.
|
||||
func (cs *ChunkSlice) Exif() (*exif.Ifd, []byte, error) {
|
||||
chunk, err := cs.FindExif()
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
|
||||
im, err := exifcommon.NewIfdMappingWithStandard()
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
|
||||
ti := exif.NewTagIndex()
|
||||
|
||||
_, index, err := exif.Collect(im, ti, chunk.Data)
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
|
||||
return index.RootIfd, chunk.Data, nil
|
||||
}
|
||||
|
||||
// ConstructExifBuilder returns an `exif.IfdBuilder` instance
|
||||
// (needed for modifying) preloaded with all existing tags.
|
||||
func (cs *ChunkSlice) ConstructExifBuilder() (*exif.IfdBuilder, error) {
|
||||
rootIfd, _, err := cs.Exif()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return exif.NewIfdBuilderFromExistingChain(rootIfd), nil
|
||||
}
|
||||
|
||||
// SetExif encodes and sets EXIF data into this segment.
|
||||
func (cs *ChunkSlice) SetExif(ib *exif.IfdBuilder) error {
|
||||
// Encode.
|
||||
|
||||
ibe := exif.NewIfdByteEncoder()
|
||||
|
||||
exifData, err := ibe.EncodeToExif(ib)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Set.
|
||||
|
||||
exifChunk, err := cs.FindExif()
|
||||
|
||||
switch {
|
||||
case err == nil:
|
||||
// EXIF chunk already exists.
|
||||
exifChunk.Data = exifData
|
||||
exifChunk.Length = uint32(len(exifData))
|
||||
|
||||
case errors.Is(err, exif.ErrNoExif):
|
||||
// Add a EXIF chunk for the first time.
|
||||
exifChunk = &Chunk{
|
||||
Type: EXifChunkType,
|
||||
Data: exifData,
|
||||
Length: uint32(len(exifData)),
|
||||
}
|
||||
|
||||
// Insert exif after the IHDR chunk; it's
|
||||
// a reliably appropriate place to put it.
|
||||
cs.chunks = append(
|
||||
cs.chunks[:1],
|
||||
append(
|
||||
[]*Chunk{exifChunk},
|
||||
cs.chunks[1:]...,
|
||||
)...,
|
||||
)
|
||||
|
||||
default:
|
||||
return err
|
||||
}
|
||||
|
||||
exifChunk.UpdateCrc32()
|
||||
return nil
|
||||
}
|
||||
|
||||
// PngSplitter hosts the princpal `Split()`
|
||||
// method uses by `bufio.Scanner`.
|
||||
type PngSplitter struct {
|
||||
chunks []*Chunk
|
||||
currentOffset int
|
||||
|
||||
doCheckCrc bool
|
||||
crcErrors []string
|
||||
}
|
||||
|
||||
func (ps *PngSplitter) Chunks() (*ChunkSlice, error) {
|
||||
return NewChunkSlice(ps.chunks)
|
||||
}
|
||||
|
||||
func (ps *PngSplitter) DoCheckCrc(doCheck bool) {
|
||||
ps.doCheckCrc = doCheck
|
||||
}
|
||||
|
||||
func (ps *PngSplitter) CrcErrors() []string {
|
||||
return ps.crcErrors
|
||||
}
|
||||
|
||||
func NewPngSplitter() *PngSplitter {
|
||||
return &PngSplitter{
|
||||
chunks: make([]*Chunk, 0),
|
||||
doCheckCrc: true,
|
||||
crcErrors: make([]string, 0),
|
||||
}
|
||||
}
|
||||
|
||||
// Chunk describes a single chunk.
|
||||
type Chunk struct {
|
||||
Offset int
|
||||
Length uint32
|
||||
Type string
|
||||
Data []byte
|
||||
Crc uint32
|
||||
}
|
||||
|
||||
func (c *Chunk) String() string {
|
||||
return fmt.Sprintf("Chunk<OFFSET=(%d) LENGTH=(%d) TYPE=[%s] CRC=(%d)>", c.Offset, c.Length, c.Type, c.Crc)
|
||||
}
|
||||
|
||||
func calculateCrc32(chunk *Chunk) uint32 {
|
||||
c := crc32.NewIEEE()
|
||||
|
||||
c.Write([]byte(chunk.Type))
|
||||
c.Write(chunk.Data)
|
||||
|
||||
return c.Sum32()
|
||||
}
|
||||
|
||||
func (c *Chunk) UpdateCrc32() {
|
||||
c.Crc = calculateCrc32(c)
|
||||
}
|
||||
|
||||
func (c *Chunk) CheckCrc32() bool {
|
||||
expected := calculateCrc32(c)
|
||||
return c.Crc == expected
|
||||
}
|
||||
|
||||
// Bytes encodes and returns the bytes for this chunk.
|
||||
func (c *Chunk) Bytes() ([]byte, error) {
|
||||
if len(c.Data) != int(c.Length) {
|
||||
return nil, errors.New("length of data not correct")
|
||||
}
|
||||
b := make([]byte, 0, 4+4+c.Length+4)
|
||||
b = binary.BigEndian.AppendUint32(b, c.Length)
|
||||
b = append(b, c.Type...)
|
||||
b = append(b, c.Data...)
|
||||
b = binary.BigEndian.AppendUint32(b, c.Crc)
|
||||
return b, nil
|
||||
}
|
||||
|
||||
// Write encodes and writes the bytes for this chunk.
|
||||
func (c *Chunk) WriteTo(w io.Writer) (int, error) {
|
||||
if len(c.Data) != int(c.Length) {
|
||||
return 0, errors.New("length of data not correct")
|
||||
}
|
||||
|
||||
var n int
|
||||
|
||||
b := make([]byte, 4) // uint32 buf
|
||||
|
||||
binary.BigEndian.PutUint32(b, c.Length)
|
||||
if nn, err := w.Write(b); err != nil {
|
||||
return n + nn, err
|
||||
}
|
||||
|
||||
n += len(b)
|
||||
|
||||
if nn, err := io.WriteString(w, c.Type); err != nil {
|
||||
return n + nn, err
|
||||
}
|
||||
|
||||
n += len(c.Type)
|
||||
|
||||
if nn, err := w.Write(c.Data); err != nil {
|
||||
return n + nn, err
|
||||
}
|
||||
|
||||
n += len(c.Data)
|
||||
|
||||
binary.BigEndian.PutUint32(b, c.Crc)
|
||||
if nn, err := w.Write(b); err != nil {
|
||||
return n + nn, err
|
||||
}
|
||||
|
||||
n += len(b)
|
||||
|
||||
return n, nil
|
||||
}
|
||||
|
||||
// readHeader verifies that the PNG header bytes appear next.
|
||||
func (ps *PngSplitter) readHeader(r io.Reader) error {
|
||||
var (
|
||||
sigLen = len(PngSignature)
|
||||
header = make([]byte, sigLen)
|
||||
)
|
||||
|
||||
if _, err := r.Read(header); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
ps.currentOffset += sigLen
|
||||
if !bytes.Equal(header, PngSignature[:]) {
|
||||
return ErrNotPng
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Split fulfills the `bufio.SplitFunc`
|
||||
// function definition for `bufio.Scanner`.
|
||||
func (ps *PngSplitter) Split(
|
||||
data []byte,
|
||||
atEOF bool,
|
||||
) (
|
||||
advance int,
|
||||
token []byte,
|
||||
err error,
|
||||
) {
|
||||
// We might have more than one chunk's worth, and,
|
||||
// if `atEOF` is true, we won't be called again.
|
||||
// We'll repeatedly try to read additional chunks,
|
||||
// but, when we run out of the data we were given
|
||||
// then we'll return the number of bytes for the
|
||||
// chunks we've already completely read. Then, we'll
|
||||
// be called again from the end ofthose bytes, at
|
||||
// which point we'll indicate that we don't yet have
|
||||
// enough for another chunk, and we should be then
|
||||
// called with more.
|
||||
for {
|
||||
len_ := len(data)
|
||||
if len_ < 8 {
|
||||
return advance, nil, nil
|
||||
}
|
||||
|
||||
length := binary.BigEndian.Uint32(data[:4])
|
||||
type_ := string(data[4:8])
|
||||
chunkSize := (8 + int(length) + 4)
|
||||
|
||||
if len_ < chunkSize {
|
||||
return advance, nil, nil
|
||||
}
|
||||
|
||||
crcIndex := 8 + length
|
||||
crc := binary.BigEndian.Uint32(data[crcIndex : crcIndex+4])
|
||||
|
||||
content := make([]byte, length)
|
||||
copy(content, data[8:8+length])
|
||||
|
||||
c := &Chunk{
|
||||
Length: length,
|
||||
Type: type_,
|
||||
Data: content,
|
||||
Crc: crc,
|
||||
Offset: ps.currentOffset,
|
||||
}
|
||||
|
||||
ps.chunks = append(ps.chunks, c)
|
||||
|
||||
if !c.CheckCrc32() {
|
||||
ps.crcErrors = append(ps.crcErrors, type_)
|
||||
|
||||
if ps.doCheckCrc {
|
||||
err = ErrCrcFailure
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
advance += chunkSize
|
||||
ps.currentOffset += chunkSize
|
||||
|
||||
data = data[chunkSize:]
|
||||
}
|
||||
}
|
||||
|
||||
var (
|
||||
// Enforce interface conformance.
|
||||
_ riimage.MediaContext = new(ChunkSlice)
|
||||
)
|
||||
77
vendor/github.com/superseriousbusiness/go-png-image-structure/v2/testing_common.go
generated
vendored
Normal file
77
vendor/github.com/superseriousbusiness/go-png-image-structure/v2/testing_common.go
generated
vendored
Normal file
|
|
@ -0,0 +1,77 @@
|
|||
package pngstructure
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"os"
|
||||
"path"
|
||||
)
|
||||
|
||||
var (
|
||||
assetsPath = "assets"
|
||||
)
|
||||
|
||||
func getModuleRootPath() (string, error) {
|
||||
moduleRootPath := os.Getenv("PNG_MODULE_ROOT_PATH")
|
||||
if moduleRootPath != "" {
|
||||
return moduleRootPath, nil
|
||||
}
|
||||
|
||||
currentWd, err := os.Getwd()
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
currentPath := currentWd
|
||||
visited := make([]string, 0)
|
||||
|
||||
for {
|
||||
tryStampFilepath := path.Join(currentPath, ".MODULE_ROOT")
|
||||
|
||||
_, err := os.Stat(tryStampFilepath)
|
||||
if err != nil && !os.IsNotExist(err) {
|
||||
return "", err
|
||||
} else if err == nil {
|
||||
break
|
||||
}
|
||||
|
||||
visited = append(visited, tryStampFilepath)
|
||||
|
||||
currentPath = path.Dir(currentPath)
|
||||
if currentPath == "/" {
|
||||
return "", fmt.Errorf("could not find module-root: %v", visited)
|
||||
}
|
||||
}
|
||||
|
||||
return currentPath, nil
|
||||
}
|
||||
|
||||
func getTestAssetsPath() (string, error) {
|
||||
if assetsPath == "" {
|
||||
moduleRootPath, err := getModuleRootPath()
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
assetsPath = path.Join(moduleRootPath, "assets")
|
||||
}
|
||||
|
||||
return assetsPath, nil
|
||||
}
|
||||
|
||||
func getTestBasicImageFilepath() (string, error) {
|
||||
assetsPath, err := getTestAssetsPath()
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return path.Join(assetsPath, "libpng.png"), nil
|
||||
}
|
||||
|
||||
func getTestExifImageFilepath() (string, error) {
|
||||
assetsPath, err := getTestAssetsPath()
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
return path.Join(assetsPath, "exif.png"), nil
|
||||
}
|
||||
|
|
@ -3,8 +3,6 @@
|
|||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
|
||||
"github.com/dsoprea/go-logging"
|
||||
)
|
||||
|
||||
func DumpBytes(data []byte) {
|
||||
|
|
@ -32,34 +30,38 @@ func DumpBytesClause(data []byte) {
|
|||
fmt.Printf(" }\n")
|
||||
}
|
||||
|
||||
func DumpBytesToString(data []byte) string {
|
||||
func DumpBytesToString(data []byte) (string, error) {
|
||||
b := new(bytes.Buffer)
|
||||
|
||||
for i, x := range data {
|
||||
_, err := b.WriteString(fmt.Sprintf("%02x", x))
|
||||
log.PanicIf(err)
|
||||
if _, err := b.WriteString(fmt.Sprintf("%02x", x)); err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
if i < len(data)-1 {
|
||||
_, err := b.WriteRune(' ')
|
||||
log.PanicIf(err)
|
||||
if _, err := b.WriteRune(' '); err != nil {
|
||||
return "", err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return b.String()
|
||||
return b.String(), nil
|
||||
}
|
||||
|
||||
func DumpBytesClauseToString(data []byte) string {
|
||||
func DumpBytesClauseToString(data []byte) (string, error) {
|
||||
b := new(bytes.Buffer)
|
||||
|
||||
for i, x := range data {
|
||||
_, err := b.WriteString(fmt.Sprintf("0x%02x", x))
|
||||
log.PanicIf(err)
|
||||
if _, err := b.WriteString(fmt.Sprintf("0x%02x", x)); err != nil {
|
||||
return "", err
|
||||
}
|
||||
|
||||
if i < len(data)-1 {
|
||||
_, err := b.WriteString(", ")
|
||||
log.PanicIf(err)
|
||||
if _, err := b.WriteString(", "); err != nil {
|
||||
return "", err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return b.String()
|
||||
return b.String(), nil
|
||||
}
|
||||
10
vendor/modules.txt
vendored
10
vendor/modules.txt
vendored
|
|
@ -167,9 +167,6 @@ github.com/dsoprea/go-logging
|
|||
# github.com/dsoprea/go-photoshop-info-format v0.0.0-20200610045659-121dd752914d
|
||||
## explicit; go 1.13
|
||||
github.com/dsoprea/go-photoshop-info-format
|
||||
# github.com/dsoprea/go-png-image-structure/v2 v2.0.0-20210512210324-29b889a6093d
|
||||
## explicit; go 1.12
|
||||
github.com/dsoprea/go-png-image-structure/v2
|
||||
# github.com/dsoprea/go-utility/v2 v2.0.0-20200717064901-2fccff4aa15e
|
||||
## explicit; go 1.12
|
||||
github.com/dsoprea/go-utility/v2/filesystem
|
||||
|
|
@ -658,12 +655,15 @@ github.com/superseriousbusiness/activity/streams/values/rfc2045
|
|||
github.com/superseriousbusiness/activity/streams/values/rfc5988
|
||||
github.com/superseriousbusiness/activity/streams/values/string
|
||||
github.com/superseriousbusiness/activity/streams/vocab
|
||||
# github.com/superseriousbusiness/exif-terminator v0.5.0
|
||||
## explicit; go 1.17
|
||||
# github.com/superseriousbusiness/exif-terminator v0.6.0
|
||||
## explicit; go 1.21
|
||||
github.com/superseriousbusiness/exif-terminator
|
||||
# github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe
|
||||
## explicit; go 1.17
|
||||
github.com/superseriousbusiness/go-jpeg-image-structure/v2
|
||||
# github.com/superseriousbusiness/go-png-image-structure/v2 v2.0.1-SSB
|
||||
## explicit; go 1.12
|
||||
github.com/superseriousbusiness/go-png-image-structure/v2
|
||||
# github.com/superseriousbusiness/oauth2/v4 v4.3.2-SSB.0.20230227143000-f4900831d6c8
|
||||
## explicit; go 1.13
|
||||
github.com/superseriousbusiness/oauth2/v4
|
||||
|
|
|
|||
Loading…
Reference in a new issue