Python—HTTP处理Gzip压缩数据

HTTP 请求中包含Accept-encoding: gzip头信息可以告诉服务器，如果它有任何新数据要发送给我时，请以压缩的格式发送。如果服务器支持压缩，它将返回由 gzip 压缩的数据并且使用Content-encoding: gzip头信息标记。

#codeing:utf-8
import urllib2, httplib
import StringIO
import gzip

def findUrlGzip(url):
   request = urllib2.Request(url)
   request.add_header('Accept-encoding', 'gzip')
   pener = urllib2.build_opener()
   f = opener.open(request)
   isGzip = f.headers.get('Content-Encoding')
   #print isGzip
   if isGzip :
       compresseddata = f.read()
       compressedstream = StringIO.StringIO(compresseddata)
       gzipper = gzip.GzipFile(fileobj=compressedstream)
       data = gzipper.read()
   else:
       data = f.read()
   return data

def findUrlTitle(url):
       html = findUrlGzip(url)
       html = html.lower()
       spos = html.find("<title>")
       epos = html.find("</title>")
       if spos != -1 and epos != -1 and spos < epos:
           title = html[spos+7:epos]
           title = title[:-9]
       else:
           title = ""
       return title

if __name__ == "__main__":
   url = 'http://business.sohu.com/20101010/n275509607.shtml'
   title = findUrlTitle(url)
   print title