python3 爬虫小例子
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys,re
import urllib.request,urllib.parse,http.cookiejar
class myW3():
def login(self):
'post 数据'
data = {"uid":self.uid,'password':self.password,'actionFlag':'loginAuthenticate'}
user_agent='Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
postData = urllib.parse.urlencode(data)
postData = postData.encode(encoding='utf_8')
headers = {'User-Agent':user_agent}
request = urllib.request.Request(self.url, postData,headers)
urllib.request.urlopen(request).read().decode('utf-8')
def cookie(self):
'''设置cookie,非常重要'''
cj = http.cookiejar.CookieJar()
cp = urllib.request.HTTPCookieProcessor(cj)
opener = urllib.request.build_opener(cp)
urllib.request.install_opener(opener)
def __init__(self,uid = None,password=None,url=None):
if uid is None or password is None:
sys.exit(1)
self.uid = uid
self.password = password
self.url = url
self.count = 0
self.cookie()
self.login()