如何获取文件的内容类型 [英] How to get the content-type of a file

问题描述

我正在实现一个处理GET或HEAD请求的HTTP/1.0服务器.

I am implementing a HTTP/1.0 server that processes GET or HEAD request.

我已经完成了Date，Last-Modified和Content-Length，但是我不知道如何获取文件的Content-Type.

I've finished Date, Last-Modified, and Content-Length, but I don't know how to get the Content-Type of a file.

它必须返回目录的目录(我可以使用stat()函数完成)，对于常规文件，对于text或html文件，返回text/html，对于图像或image/gif >文件.

It has to return directory for directory(which I can do using stat() function), and for a regular file, text/html for text or html file, and image/gif for image or gif file.

是否应该使用文件名对其进行硬编码?

Should this be hard-coded, using the name of the file?

我想知道是否有任何功能可以获取此Content-Type.

I wonder if there is any function to get this Content-Type.

推荐答案

您可以查看文件扩展名(大多数Web服务器所做的就是-查看例如/etc/mime.types文件；或者可以使用libmagic通过查看文件的前几个字节来自动确定内容类型.

You could either look at the file extension (which is what most web servers do -- see e.g. the /etc/mime.types file; or you could use libmagic to automatically determine the content type by looking at the first few bytes of the file.

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