英文:
Golang “net/http” DetectContentType error
问题
使用DetectContentType函数来检测上传文件的content-type，但结果始终是application/octet-stream。这只是该函数的默认返回值。
那么问题是什么？
英文:
Use DetectContentType to detect the uploaded file content-type, but the result is always application/octet-stream.this is just the default return in this function.
So what's the problem?
答案1
得分: 1
标准库的代码只能根据特定的标准算法来检测某些类型（比如包含几个常见标签的HTML），更多信息请参考https://golang.org/src/net/http/sniff.go。你可以使用github.com/rakyll/magicmime，它使用libmagic和cgo来猜测更多的文件类型。
英文:
The standard library's code is only supposed to detect certain types (like HTML that contains one of a few common tags) according to a certain standardized algorithm--more in https://golang.org/src/net/http/sniff.go. You could use github.com/rakyll/magicmime, which uses libmagic and cgo to guess at more file types.
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