python中urllib模块用法实例详解

#_*_ coding:utf-8 _*_
import sys
reload(sys)
sys.setdefaultencoding( "utf-8" )
import os
import json
from urllib import urlopen
doc = urlopen("http://xxxx?webid=1&tid=901&cateid=101").read()
doc = json.loads(doc)
print doc
print doc.keys()
print doc["msg"]
print doc['data']
print doc['ret']

    import urllib2
    import cookielib
    import urllib

    class Hi_login:
        def __init__(self):
            cookie = cookielib.CookieJar()
            self.cookie = urllib2.HTTPCookieProcessor(cookie) ##### 生成cookie ###

        def login(self,user,pwd):
            url='http://passport.baidu.com/?login'
            postdata=urllib.urlencode({
          'mem_pass':'on',
       
          'password':pwd
           'Submit':'',
          'tpl':'sp',
          'tp_reg':'sp',
          'u' :'http://hi.baidu.com',
          'username':user})
            ### proxy_support = urllib2.ProxyHandler({"http":"http://ahad-haam:3128"}) 然后加入opener方法里####
            opener = urllib2.build_opener(self.cookie) ### 使用cookie ###
            headers = { ####### dict结构，可以加入x-forward-for甚至refer等 #######
           'User-Agent':'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6'}
            urllib2.install_opener(opener)
            request = urllib2.Request(url,urllib.urlencode(postdata),headers = headers)
            urllib2.urlopen(request)
    if __name__=='__main__':
       pwd='123456'
       user='xiaofu'
       test=Hi_login()
       test.login(user,pwd)

    import urllib2
    password_mgr = urllib2.HTTPPasswordMgrWithDefaultRealm()
    url = "http://202.1.x.y/nagios"
    password_mgr.add_password(None, url, user='abc',passwd='xxxxxx')
    handler = urllib2.HTTPBasicAuthHandler(password_mgr)
    opener = urllib2.build_opener(handler)
    urllib2.install_opener(opener)
    f=urllib2.urlopen(url)
    print f.code