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[chore] bump exif-terminator to 0.4.0 (#747)

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tobi 2022-08-10 14:10:46 +02:00 committed by GitHub
parent 91c8d5d20d
commit 2462c5fe22
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5 changed files with 90 additions and 45 deletions
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2
go.mod
View file

@ -39,7 +39,7 @@ require (
github.com/spf13/viper v1.11.0
github.com/stretchr/testify v1.7.1
github.com/superseriousbusiness/activity v1.1.0-gts
github.com/superseriousbusiness/exif-terminator v0.3.0
github.com/superseriousbusiness/exif-terminator v0.4.0
github.com/superseriousbusiness/oauth2/v4 v4.3.2-SSB
github.com/tdewolff/minify/v2 v2.12.0
github.com/uptrace/bun v1.1.3

4
go.sum
View file

@ -512,8 +512,8 @@ github.com/subosito/gotenv v1.2.0 h1:Slr1R9HxAlEKefgq5jn9U+DnETlIUa6HfgEzj0g5d7s
github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
github.com/superseriousbusiness/activity v1.1.0-gts h1:BSnMzs/84s0Zme7BngE9iJAHV7g1Bv1nhLCP0aJtU3I=
github.com/superseriousbusiness/activity v1.1.0-gts/go.mod h1:AZw0Xb4Oju8rmaJCZ21gc5CPg47MmNgyac+Hx5jo8VM=
github.com/superseriousbusiness/exif-terminator v0.3.0 h1:ej7YePEB2UnAGPal5s7CnoN8eMFmDFESEAEJmbFoHh0=
github.com/superseriousbusiness/exif-terminator v0.3.0/go.mod h1:OPfOSEDWjXaW3BILJBN89j0VLD8bglmHwHHwwwSLb5A=
github.com/superseriousbusiness/exif-terminator v0.4.0 h1:pzAg7luCi8oc2LVDwgTLvTinh/+/2UuWgJZrM8MMaT4=
github.com/superseriousbusiness/exif-terminator v0.4.0/go.mod h1:OPfOSEDWjXaW3BILJBN89j0VLD8bglmHwHHwwwSLb5A=
github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe h1:ksl2oCx/Qo8sNDc3Grb8WGKBM9nkvhCm25uvlT86azE=
github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe/go.mod h1:gH4P6gN1V+wmIw5o97KGaa1RgXB/tVpC2UNzijhg3E4=
github.com/superseriousbusiness/oauth2/v4 v4.3.2-SSB h1:PtW2w6budTvRV2J5QAoSvThTHBuvh8t/+BXIZFAaBSc=

120
vendor/github.com/superseriousbusiness/exif-terminator/jpeg.go generated vendored
View file

@ -71,23 +71,48 @@
}
type jpegVisitor struct {
js *jpegstructure.JpegSplitter
writer io.Writer
js *jpegstructure.JpegSplitter
writer io.Writer
expectedFileSize int
writtenTotalBytes int
}
// HandleSegment satisfies the visitor interface{} of the jpegstructure library.
//
// We don't really care about any of the parameters, since all we're interested
// We don't really care about many of the parameters, since all we're interested
// in here is the very last segment that was scanned.
func (v *jpegVisitor) HandleSegment(_ byte, _ string, _ int, _ bool) error {
// all we want to do here is get the last segment that was scanned, and then manipulate it
func (v *jpegVisitor) HandleSegment(segmentMarker byte, _ string, _ int, _ bool) error {
// get the most recent segment scanned (ie., last in the segments list)
segmentList := v.js.Segments()
segments := segmentList.Segments()
lastSegment := segments[len(segments)-1]
return v.writeSegment(lastSegment)
mostRecentSegment := segments[len(segments)-1]
// check if we've written the expected number of bytes by EOI
if segmentMarker == jpegstructure.MARKER_EOI {
// take account of the last 2 bytes taken up by the EOI
eoiLength := 2
// this is the total file size we will
// have written including the EOI
willHaveWritten := v.writtenTotalBytes + eoiLength
if willHaveWritten < v.expectedFileSize {
// if we won't have written enough,
// pad the final segment before EOI
// so that we meet expected file size
missingBytes := make([]byte, v.expectedFileSize-willHaveWritten)
if _, err := v.writer.Write(missingBytes); err != nil {
return err
}
}
}
// process the segment
return v.writeSegment(mostRecentSegment)
}
func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
var writtenSegmentData int
w := v.writer
defer func() {
@ -98,9 +123,11 @@ func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
// The scan-data will have a marker-ID of (0) because it doesn't have a marker-ID or length.
if s.MarkerId != 0 {
if _, err := w.Write([]byte{0xff, s.MarkerId}); err != nil {
markerIDWritten, err := w.Write([]byte{0xff, s.MarkerId})
if err != nil {
return err
}
writtenSegmentData += markerIDWritten
sizeLen, found := markerLen[s.MarkerId]
if !found || sizeLen == 2 {
@ -111,6 +138,7 @@ func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
return err
}
writtenSegmentData += 2
} else if sizeLen == 4 {
l := uint32(len(s.Data) + sizeLen)
@ -118,6 +146,7 @@ func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
return err
}
writtenSegmentData += 4
} else if sizeLen != 0 {
return fmt.Errorf("not a supported marker-size: MARKER-ID=(0x%02x) MARKER-SIZE-LEN=(%d)", s.MarkerId, sizeLen)
}
@ -125,8 +154,14 @@ func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
if !s.IsExif() {
// if this isn't exif data just copy it over and bail
_, err := w.Write(s.Data)
return err
writtenNormalData, err := w.Write(s.Data)
if err != nil {
return err
}
writtenSegmentData += writtenNormalData
v.writtenTotalBytes += writtenSegmentData
return nil
}
ifd, _, err := s.Exif()
@ -134,8 +169,8 @@ func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
return err
}
// amount of bytes we've written into the exif body
var written int
// amount of bytes we've writtenExifData into the exif body, we'll update this as we go
var writtenExifData int
if orientationEntries, err := ifd.FindTagWithName("Orientation"); err == nil && len(orientationEntries) == 1 {
// If we have an orientation entry, we don't want to completely obliterate the exif data.
@ -152,30 +187,31 @@ func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
//
// Then we write the ifd0 entry which contains the orientation data.
//
// After that we just fill fill fill.
// After that we just fill.
newData := &bytes.Buffer{}
newExifData := &bytes.Buffer{}
byteOrder := ifd.ByteOrder()
// 1. Write exif prefix.
// https://www.ozhiker.com/electronics/pjmt/jpeg_info/app_segments.html
prefix := []byte{'E', 'x', 'i', 'f', 0, 0}
if err := binary.Write(newData, ifd.ByteOrder(), &prefix); err != nil {
if err := binary.Write(newExifData, byteOrder, &prefix); err != nil {
return err
}
written += 6
writtenExifData += len(prefix)
// 2. Write exif header, taking the existing byte order.
exifHeader, err := exif.BuildExifHeader(ifd.ByteOrder(), exif.ExifDefaultFirstIfdOffset)
exifHeader, err := exif.BuildExifHeader(byteOrder, exif.ExifDefaultFirstIfdOffset)
if err != nil {
return err
}
hWritten, err := newData.Write(exifHeader)
hWritten, err := newExifData.Write(exifHeader)
if err != nil {
return err
}
written += hWritten
writtenExifData += hWritten
// https://web.archive.org/web/20190624045241if_/http://www.cipa.jp:80/std/documents/e/DC-008-Translation-2019-E.pdf
// 3. Write in the new ifd
//
// An ifd with one orientation entry is structured like this:
// 2 bytes: the number of entries in the ifd uint16(1)
@ -191,61 +227,69 @@ func (v *jpegVisitor) writeSegment(s *jpegstructure.Segment) error {
// 6 = Rotate 90 CW
// 7 = Mirror horizontal and rotate 90 CW
// 8 = Rotate 270 CW
//
// see https://web.archive.org/web/20190624045241if_/http://www.cipa.jp:80/std/documents/e/DC-008-Translation-2019-E.pdf - p24-25
orientationEntry := orientationEntries[0]
ifdCount := uint16(1) // we're only adding one entry into the ifd
if err := binary.Write(newData, ifd.ByteOrder(), &ifdCount); err != nil {
if err := binary.Write(newExifData, byteOrder, &ifdCount); err != nil {
return err
}
written += 2
writtenExifData += 2
tagID := orientationEntry.TagId()
if err := binary.Write(newData, ifd.ByteOrder(), &tagID); err != nil {
if err := binary.Write(newExifData, byteOrder, &tagID); err != nil {
return err
}
written += 2
writtenExifData += 2
tagType := orientationEntry.TagType()
if err := binary.Write(newData, ifd.ByteOrder(), &tagType); err != nil {
tagType := uint16(orientationEntry.TagType())
if err := binary.Write(newExifData, byteOrder, &tagType); err != nil {
return err
}
written += 2
writtenExifData += 2
tagCount := orientationEntry.UnitCount()
if err := binary.Write(newData, ifd.ByteOrder(), &tagCount); err != nil {
if err := binary.Write(newExifData, byteOrder, &tagCount); err != nil {
return err
}
written += 4
writtenExifData += 4
valueOffset, err := orientationEntry.GetRawBytes()
if err != nil {
return err
}
vWritten, err := newData.Write(valueOffset)
vWritten, err := newExifData.Write(valueOffset)
if err != nil {
return err
}
written += vWritten
writtenExifData += vWritten
valuePad := make([]byte, 4-vWritten)
pWritten, err := newData.Write(valuePad)
pWritten, err := newExifData.Write(valuePad)
if err != nil {
return err
}
written += pWritten
writtenExifData += pWritten
// write everything in
if _, err := io.Copy(w, newData); err != nil {
// write all the new data into the writer from the segment
writtenNewExifData, err := io.Copy(w, newExifData)
if err != nil {
return err
}
writtenSegmentData += int(writtenNewExifData)
}
// fill in the (remaining) exif body with blank bytes
blank := make([]byte, len(s.Data)-written)
if _, err := w.Write(blank); err != nil {
// fill in any remaining exif body with blank bytes
blank := make([]byte, len(s.Data)-writtenExifData)
writtenPadding, err := w.Write(blank)
if err != nil {
return err
}
writtenSegmentData += writtenPadding
v.writtenTotalBytes += writtenSegmentData
return nil
}

7
vendor/github.com/superseriousbusiness/exif-terminator/terminator.go generated vendored
View file

@ -42,7 +42,7 @@ func Terminate(in io.Reader, fileSize int, mediaType string) (io.Reader, error)
switch mediaType {
case "image/jpeg", "jpeg", "jpg":
err = terminateJpeg(scanner, pipeWriter)
err = terminateJpeg(scanner, pipeWriter, fileSize)
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
@ -65,10 +65,11 @@ func Terminate(in io.Reader, fileSize int, mediaType string) (io.Reader, error)
return pipeReader, err
}
func terminateJpeg(scanner *bufio.Scanner, writer io.WriteCloser) error {
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
v := &jpegVisitor{
writer: writer,
writer: writer,
expectedFileSize: expectedFileSize,
}
// provide the visitor to the splitter so that it triggers on every section scan

2
vendor/modules.txt vendored
View file

@ -535,7 +535,7 @@ 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 v0.3.0
# github.com/superseriousbusiness/exif-terminator v0.4.0
## explicit; go 1.17
github.com/superseriousbusiness/exif-terminator
# github.com/superseriousbusiness/go-jpeg-image-structure/v2 v2.0.0-20220321154430-d89a106fdabe