英文:
Recommended way to check if a file is compressed /zipped
问题
我正在尝试检查一个上传的文件（没有文件扩展名）是否被压缩/打包。我已经搜索了fileinfo、fileheader等，但还没有找到一种方法来实现这个。也许可以通过魔术数字来判断？谢谢。
英文:
I am trying to check if an uploaded file ( no file extension) is compressed/ zipped.
I searched through the fileinfo, fileheader etc but haven't found a way to do this. May be the magic number?
Thanks
答案1
得分: 4
一个快速且简便的内置方法是使用http.DetectContentType()。它不仅可以检测gzip/zip，还可以做更多的事情，但由于它不会检查太多的内容，所以非常快速。如果你想检查一个较小的集合，并跳过对字符串进行测试，可以查看src/net/http/sniff.go中的源代码，并提取你想要的测试。
英文:
A quick-and-easy built-in way is with http.DetectContentType(). It does much more than just gzip/zip, but it's very fast because it doesn't check for too many things. If you want to check for a smaller set, and skip testing a string, check the source code in src/net/http/sniff.go and pull out the tests you want.
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