python 下载文件的应用

之前给大家分享的，我觉的大家看了以后，应该会对 抓取网页有个很好的认识,不过这个只能用python 来抓取到网页的源代码，如果你想用做python 下载文件的话，上面的可能就不适合你了，最近我在用python 做文件下载的时候就遇到这个问题了，不过最终得以解决，为了让大家以后碰过这个问题有更好的解决办法，我把代码发出来：

from os.path import basename
from urlparse import urlsplit

def url2name(url):
    return basename(urlsplit(url)[2])

def download(url, localFileName = None):
    localName = url2name(url)
    req = urllib2.Request(url)
    r = urllib2.urlopen(req)
    if r.info().has_key('Content-Disposition'):
        # If the response has Content-Disposition, we take file name from it
        localName = r.info()['Content-Disposition'].split('filename=')[1]
        if localName[0] == '"' or localName[0] == "'":
            localName = localName[1:-1]
    elif r.url != url:
        # if we were redirected, the real file name we take from the final URL
        localName = url2name(r.url)
    if localFileName:
        # we can force to save the file as specified name
        localName = localFileName
    f = open(localName, 'wb')
    f.write(r.read())
    f.close()


download(r'你要下载的python文件的url地址')

赶快去试试把，可以在本地运行python去下载一些自己想要的pdf文件吧。

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