urllib2修改header

python網絡訪問的標準模塊html


urllib與urllib2並非升級版的關係,具體可見谷歌文章:difference between urllib and urllib2
urllib2的官方文檔:https://docs.python.org/2.7/library/urllib2.html#module-urllib2
最簡單的應用:
urllib2.urlopen(url,data,timeout)
  data:以post提交url時用的
urllib2.Request(url, data=None, headers={},origin_req_host=None, unverifiable=False)python

  headers:發給服務器的身份證號,默認狀況下urllib2的身份證號爲本身的版本號Python-urllib/x.y。瀏覽器

  網站經過瀏覽器發送過來的User-Agent的值來確認瀏覽器身份,所以用urllib2建立一個請求對象,並給它一個包含頭數據的字典來欺騙網站。服務器

 

#!/usr/bin/env python
# _*_ coding: utf-8 _*_
# __author__ ='kong'

import urllib2
import userAgents


class Urllib2ModifyHeader(object):
    def __init__(self):
        PIUA = {"User-Agent":"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)"}
        MUUA = {"User-Agent":"NOKIA5700/ UCWEB7.0.2.37/28/999"}
        self.url = "http://fanyi.youdao.com"
        self.useUserAgent(PIUA,1)
        self.useUserAgent(MUUA,2)


    def useUserAgent(self,userAgent,name):
        request = urllib2.Request(self.url,headers=userAgent)
        # request.add_header(userAgent.split(":")[0],userAgent.split(":")[1])
        response = urllib2.urlopen(request)
        fileName = str(name) + '.html'
        with open(fileName,'a') as fp:
            fp.write("%s\n\n"%userAgent)
            fp.write(response.read())


if __name__ == '__main__':
    umh = Urllib2ModifyHeader()

  解釋:網絡

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