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Infer content type in alloc fs stat endpoint #5907

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merged 2 commits into from
Jul 1, 2019
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preetapan
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This PR adds a new field to AllocFileInfo, used in the stat endpoint. It uses http.DetectContentType to infer content type for files.

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@notnoop notnoop left a comment

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lgtm - but few minor nit picky things but feel to merge when ready.

// detectContentType tries to infer the file type by reading the first
// 512 bytes of the file. Json file extensions are special cased.
func detectContentType(fileInfo os.FileInfo, path string) string {
contentType := "unknown"
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I would default to application/octet-stream and consider returning rather than assigning to variable.

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+1 to this. It's essentially how I'd interpret unknown anyway, might as well use the proper generic binary type.

}
}
// Special case json files
if strings.HasSuffix(path, ".json") {
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Given that this is a cheaper check, I'd consider checking it first.

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Probably an unnecessary caution, but it's possible that a *.json file isn't actually json. Could be useful to only do this more targeted content typing if the file sniffing content type is in fact text.

fileInfo, err := os.Stat(imgPath)
require.Nil(err)
res := detectContentType(fileInfo, imgPath)
require.Equal("image/png", res)
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more nit picking - seems like a good candidate for table testing - I would test go source files and maybe some application/octet-stream file as well.

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@DingoEatingFuzz DingoEatingFuzz left a comment

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Thank you for doing this! Looks good to me. Just had a couple picky things to say.

@preetapan preetapan merged commit 15df89b into master Jul 1, 2019
@endocrimes endocrimes deleted the f-infer-contenttype branch July 3, 2019 08:46
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3 participants