diff options
| -rw-r--r-- | modules/typesniffer/typesniffer.go | 10 | ||||
| -rw-r--r-- | modules/typesniffer/typesniffer_test.go | 4 |
2 files changed, 14 insertions, 0 deletions
diff --git a/modules/typesniffer/typesniffer.go b/modules/typesniffer/typesniffer.go index 5b215496b..7887fd42b 100644 --- a/modules/typesniffer/typesniffer.go +++ b/modules/typesniffer/typesniffer.go @@ -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} } diff --git a/modules/typesniffer/typesniffer_test.go b/modules/typesniffer/typesniffer_test.go index 2bafdffd1..6c6da34aa 100644 --- a/modules/typesniffer/typesniffer_test.go +++ b/modules/typesniffer/typesniffer_test.go @@ -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) { |