python网络编程中，使用python urllib模块时经常会死掉，以前debug过，由于没有设置 timing out导致超时而死掉。
本节内容：
1、python pycurl模块用法
2、pycurl模块自动处理cookie
3、pycurl模块实现post方法
可以使用curl的扩展库pycurl模块，curl是非常强劲的一个工具。
链接：http://pycurl.sourceforge.net/ 下载最新的PycURL。
例1，python pycurl模块用法：
#!/usr/bin/env python
import pycurl
import StringIO
url = "http://www.jb200.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()
例2，pycurl模块自动处理cookie。
#!/usr/bin/env python
import pycurl
import StringIO
url = "http://www.plcxue.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()
例3，pycurl模块实现post方法。
#!/usr/bin/env python
import pycurl
import StringIO
import urllib
url = "http://www.plcxue.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 data
crl.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()
附，urllib 超时设置