Python PycURL 网络编程

在使用urllib的时候经常会死掉，以前debug过，是没有设置 timing out 所以超时后就会死掉。
PycURL是curl的python库，虽然有些curl的功能没有实现，但是还是很强劲的。

curl是非常强劲的一个工具，
google内部用它来 debug GDATA API. Using cURL to interact with Google data services

可以去 http://pycurl.sourceforge.net/ 下载最新的PycURL。

简单的PycURL例子

import pycurlimport StringIO url = "http://www.google.com/"crl = pycurl.Curl()crl.setopt(pycurl.VERBOSE,1)crl.setopt(pycurl.FOLLOWLOCATION, 1)crl.setopt(pycurl.MAXREDIRS, 5)crl.fp = StringIO.StringIO()crl.setopt(pycurl.URL, url)crl.setopt(crl.WRITEFUNCTION, crl.fp.write)crl.perform()print crl.fp.getvalue()

PycURL 自动处理cookie

import pycurlimport StringIO url = "http://www.google.com/"crl = pycurl.Curl()crl.setopt(pycurl.VERBOSE,1)crl.setopt(pycurl.FOLLOWLOCATION, 1)crl.setopt(pycurl.MAXREDIRS, 5)crl.fp = StringIO.StringIO()crl.setopt(pycurl.URL, url)crl.setopt(crl.WRITEFUNCTION, crl.fp.write) # Option -b/--cookie <name=string/file> Cookie string or file to read cookies from# Note: must be a string, not a file object.crl.setopt(pycurl.COOKIEFILE, "cookie_file_name") # Option -c/--cookie-jar <file> Write cookies to this file after operation# Note: must be a string, not a file object.crl.setopt(pycurl.COOKIEJAR, "cookie_file_name") crl.perform()print crl.fp.getvalue()

PycURL 实现POST方法

import pycurlimport StringIOimport urllib url = "http://www.google.com/"post_data_dic = {"name":"value"}crl = pycurl.Curl()crl.setopt(pycurl.VERBOSE,1)crl.setopt(pycurl.FOLLOWLOCATION, 1)crl.setopt(pycurl.MAXREDIRS, 5)#crl.setopt(pycurl.AUTOREFERER,1) crl.setopt(pycurl.CONNECTTIMEOUT, 60)crl.setopt(pycurl.TIMEOUT, 300)#crl.setopt(pycurl.PROXY,proxy)crl.setopt(pycurl.HTTPPROXYTUNNEL,1)#crl.setopt(pycurl.NOSIGNAL, 1)crl.fp = StringIO.StringIO()crl.setopt(pycurl.USERAGENT, "dhgu hoho") # Option -d/--data <data>   HTTP POST datacrl.setopt(crl.POSTFIELDS,  urllib.urlencode(post_data_dic)) crl.setopt(pycurl.URL, url)crl.setopt(crl.WRITEFUNCTION, crl.fp.write)crl.perform() print crl.fp.getvalue()

urllib 超时设置

import socketsocket.setdefaulttimeout(5.0)

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