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Detect ogg mime-type as audio or video (#26494)

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"ogg" is just a "container" format for audio and video.

Golang's `DetectContentType` only reports "application/ogg" for
potential ogg files.

Actually it could do more "guess" to see whether it is a audio file or a
video file.
This commit is contained in:
wxiaoguang
2023-08-15 10:31:25 +08:00
committed by GitHub
parent c91a7e8dbb
commit ced34bab1a
2 changed files with 25 additions and 1 deletions
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13
modules/typesniffer/typesniffer.go
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@@ -71,7 +71,7 @@ func (ct SniffedType) IsRepresentableAsText() bool {
return ct.IsText() || ct.IsSvgImage()
}
// IsBrowsableType returns whether a non-text type can be displayed in a browser
// IsBrowsableBinaryType returns whether a non-text type can be displayed in a browser
func (ct SniffedType) IsBrowsableBinaryType() bool {
return ct.IsImage() || ct.IsSvgImage() || ct.IsPDF() || ct.IsVideo() || ct.IsAudio()
}
@@ -116,6 +116,17 @@ func DetectContentType(data []byte) SniffedType {
}
}
if ct == "application/ogg" {
dataHead := data
if len(dataHead) > 256 {
dataHead = dataHead[:256] // only need to do a quick check for the file header
}
if bytes.Contains(dataHead, []byte("theora")) || bytes.Contains(dataHead, []byte("dirac")) {
ct = "video/ogg" // ogg is only used for some video formats, and it's not popular
} else {
ct = "audio/ogg" // for most cases, it is used as an audio container
}
}
return SniffedType{ct}
}