serv/forgejo
1
0
Fork 0
mirror of https://codeberg.org/forgejo/forgejo.git synced 2024-12-27 14:13:52 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

Do not recognize text files as audio (#23355) (#23368)

Browse source 
Backport #23355

Close #17108

This PR uses a trick (removing the ID3 tag) to detect the content again
to to see whether the content is text type.

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
Giteabot 2023-03-08 03:03:05 -05:00 committed by GitHub
parent ed25e094ab
commit cf80f829b4
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 14 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
modules/typesniffer/typesniffer.go
View file

@ -106,6 +106,16 @@ func DetectContentType(data []byte) SniffedType {
}
}
if strings.HasPrefix(ct, "audio/") && bytes.HasPrefix(data, []byte("ID3")) {
// The MP3 detection is quite inaccurate, any content with "ID3" prefix will result in "audio/mpeg".
// So remove the "ID3" prefix and detect again, if result is text, then it must be text content.
// This works especially because audio files contain many unprintable/invalid characters like `0x00`
ct2 := http.DetectContentType(data[3:])
if strings.HasPrefix(ct2, "text/") {
ct = ct2
}
}
return SniffedType{ct}
}

4
modules/typesniffer/typesniffer_test.go
View file

@ -109,6 +109,10 @@ func TestIsAudio(t *testing.T) {
mp3, _ := base64.StdEncoding.DecodeString("SUQzBAAAAAABAFRYWFgAAAASAAADbWFqb3JfYnJhbmQAbXA0MgBUWFhYAAAAEQAAA21pbm9yX3Zl")
assert.True(t, DetectContentType(mp3).IsAudio())
assert.False(t, DetectContentType([]byte("plain text")).IsAudio())
assert.True(t, DetectContentType([]byte("ID3Toy\000")).IsAudio())
assert.True(t, DetectContentType([]byte("ID3Toy\n====\t* hi 🌞, ...")).IsText()) // test ID3 tag for plain text
assert.True(t, DetectContentType([]byte("ID3Toy\n====\t* hi 🌞, ..."+"🌛"[0:2])).IsText()) // test ID3 tag with incomplete UTF8 char
}
func TestDetectContentTypeFromReader(t *testing.T) {