Python爬虫模拟登录带验证码网站

import urllib2import cookielibimport urllibimport reimport sys'''模拟登录'''reload(sys)sys.setdefaultencoding("utf-8")# 防止中文报错CaptchaUrl = "http://202.115.80.153/CheckCode.aspx"PostUrl = "http://202.115.80.153/default2.aspx"# 验证码地址和post地址cookie = cookielib.CookieJar()handler = urllib2.HTTPCookieProcessor(cookie)opener = urllib2.build_opener(handler)# 将cookies绑定到一个opener cookie由cookielib自动管理username = 'username'password = 'password123'# 用户名和密码picture = opener.open(CaptchaUrl).read()# 用openr访问验证码地址,获取cookielocal = open('e:/image.jpg', 'wb')local.write(picture)local.close()# 保存验证码到本地SecretCode = raw_input('输入验证码：')# 打开保存的验证码图片 输入postData = {'__VIEWSTATE': 'dDwyODE2NTM0OTg7Oz6pH0TWZk5t0lupp/tlA1L+rmL83g==','txtUserName': username,'TextBox2': password,'txtSecretCode': SecretCode,'RadioButtonList1': '学生','Button1': '','lbLanguage': '','hidPdrs': '','hidsc': '',}# 根据抓包信息 构造表单headers = {'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8','Accept-Language': 'zh-CN,zh;q=0.8','Connection': 'keep-alive','Content-Type': 'application/x-www-form-urlencoded','User-Agent': 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36',}# 根据抓包信息 构造headersdata = urllib.urlencode(postData)# 生成post数据 ?key1=value1&key2=value2的形式request = urllib2.Request(PostUrl, data, headers)# 构造request请求try:response = opener.open(request)result = response.read().decode('gb2312')# 由于该网页是gb2312的编码，所以需要解码print result# 打印登录后的页面except urllib2.HTTPError, e:print e.code# 利用之前存有cookie的opener登录页面