diff options
Diffstat (limited to 'workhorse/internal/upload/exif/exif.go')
-rw-r--r-- | workhorse/internal/upload/exif/exif.go | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/workhorse/internal/upload/exif/exif.go b/workhorse/internal/upload/exif/exif.go new file mode 100644 index 00000000000..a9307b1ca90 --- /dev/null +++ b/workhorse/internal/upload/exif/exif.go @@ -0,0 +1,107 @@ +package exif + +import ( + "bytes" + "context" + "errors" + "fmt" + "io" + "os/exec" + "regexp" + + "gitlab.com/gitlab-org/labkit/log" +) + +var ErrRemovingExif = errors.New("error while removing EXIF") + +type cleaner struct { + ctx context.Context + cmd *exec.Cmd + stdout io.Reader + stderr bytes.Buffer + eof bool +} + +func NewCleaner(ctx context.Context, stdin io.Reader) (io.ReadCloser, error) { + c := &cleaner{ctx: ctx} + + if err := c.startProcessing(stdin); err != nil { + return nil, err + } + + return c, nil +} + +func (c *cleaner) Close() error { + if c.cmd == nil { + return nil + } + + return c.cmd.Wait() +} + +func (c *cleaner) Read(p []byte) (int, error) { + if c.eof { + return 0, io.EOF + } + + n, err := c.stdout.Read(p) + if err == io.EOF { + if waitErr := c.cmd.Wait(); waitErr != nil { + log.WithContextFields(c.ctx, log.Fields{ + "command": c.cmd.Args, + "stderr": c.stderr.String(), + "error": waitErr.Error(), + }).Print("exiftool command failed") + + return n, ErrRemovingExif + } + + c.eof = true + } + + return n, err +} + +func (c *cleaner) startProcessing(stdin io.Reader) error { + var err error + + whitelisted_tags := []string{ + "-ResolutionUnit", + "-XResolution", + "-YResolution", + "-YCbCrSubSampling", + "-YCbCrPositioning", + "-BitsPerSample", + "-ImageHeight", + "-ImageWidth", + "-ImageSize", + "-Copyright", + "-CopyrightNotice", + "-Orientation", + } + + args := append([]string{"-all=", "--IPTC:all", "--XMP-iptcExt:all", "-tagsFromFile", "@"}, whitelisted_tags...) + args = append(args, "-") + c.cmd = exec.CommandContext(c.ctx, "exiftool", args...) + + c.cmd.Stderr = &c.stderr + c.cmd.Stdin = stdin + + c.stdout, err = c.cmd.StdoutPipe() + if err != nil { + return fmt.Errorf("failed to create stdout pipe: %v", err) + } + + if err = c.cmd.Start(); err != nil { + return fmt.Errorf("start %v: %v", c.cmd.Args, err) + } + + return nil +} + +func IsExifFile(filename string) bool { + filenameMatch := regexp.MustCompile(`(?i)\.(jpg|jpeg|tiff)$`) + + return filenameMatch.MatchString(filename) +} |