108 lines
1.9 KiB
Go
108 lines
1.9 KiB
Go
|
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)
|
||
|
|
}
|