如何在python中检查url是网页链接还是文件链接 [英] How to check the url is either web page link or file link in python

问题描述

假设我有如下链接:

    http://example.com/index.html
    http://example.com/stack.zip
    http://example.com/setup.exe
    http://example.com/news/

在上面的链接中，第一个和第四个链接是网页链接，第二个和第三个是文件链接.

In the above links first and fourth links are web page links and second and third are the file link.

这些只是文件链接的一些示例，例如 .zip 和 .exe，但可能还有许多其他文件.

These are only some examples of files links i.e .zip and .exe, but there may be many other files.

有什么标准的方法可以区分文件 url 或网页链接吗?提前致谢.

Is there any standard way to distinguish between file url or web page link? Thanks in advance.

推荐答案

import urllib
import mimetypes


def guess_type_of(link, strict=True):
    link_type, _ = mimetypes.guess_type(link)
    if link_type is None and strict:
        u = urllib.urlopen(link)
        link_type = u.headers.gettype() # or using: u.info().gettype()
    return link_type

演示:

links = ['http://stackoverflow.com/q/21515098/538284', # It's a html page
         'http://upload.wikimedia.org/wikipedia/meta/6/6d/Wikipedia_wordmark_1x.png', # It's a png file
         'http://commons.wikimedia.org/wiki/File:Typing_example.ogv', # It's a html page
         'http://upload.wikimedia.org/wikipedia/commons/e/e6/Typing_example.ogv'   # It's an ogv file
]

for link in links:
    print(guess_type_of(link))

输出:

text/html
image/x-png
text/html
application/ogg

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