转载自：http://www.cnblogs.com/meitian/p/4607737.html

在做登录的post请求时，需要记住cookie，否则不能访问登录后的页面。

下面是登录的代码：

#coding:utf-8

import urllib

import http.cookiejar

url = "http://c.highpin.cn/Users/CLogin"

postdata =urllib.parse.urlencode({

"Logon_Password":"sunmin",

"Logon_PostCode":"fghc",

"Logon_RememberMe":"false",

"Logon_UserEmail":"sun121@qq.com"

}).encode('utf-8')

header = {

"Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",

"Accept-Encoding":"utf-8",

"Accept-Language":"zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3",

"Connection":"keep-alive",

"Host":"c.highpin.cn",

"Referer":"http://c.highpin.cn/",

"User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0"

}

req = urllib.request.Request(url,postdata,header)

##print(urllib.request.urlopen(req).read().decode('utf-8'))

#自动记住cookie

cj = http.cookiejar.CookieJar()

opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))

r = opener.open(req)

print(r.read().decode('utf-8'))

以前用的是python2.7，但是python3开始很多包的位置和以前不一样了，就对这里用到的说明一下：

urllib2合并到了urllib下，urlopen使用时包的位置为urllib.request.urlopen，urlencode使用包位置为urllib.parse.urlencode

cookielib变更为了http.cookiejar

 

说明：带cookie的打印出来必须用opener.open(req).read().decode('utf-8')来发送的请求才会带上cookie，如果用urllib.request.urlopen()是不带cookie的

 

说明：

1.urllib.request.Request()返回了一个request的请求实例

2.urlopen是一个封装好的OpenerDirector实例，里面只有三个参数（url，data，timeout）

3.通过build_opener可以自己创建一个OpenerDirector实例，所以如果想要构建一个cookie管理

   build_opener(*handlers)，将handler类实例化增加到OpenerDirector中，比如像上面的例子里增加cookie，

 

 

如果已知cookie内容，且要用这个固定cookie去发送请求，可以在header中直接添加cookie内容去发送请求，例子如下：

比如通过fiddle抓取请求包，看到请求和相应的raw格式，可以看到cookie（cookie属于header）。

import urllib url = "http://h.highpin.cn/ManageJob/PubJobCompany?Length=9" postdata=urllib.parse.urlencode({
       "JobName":"测试工程师",     "YearlySalaryMin":"11",     "YearlySalaryMax":"12",     "X-Requested-With":"XMLHttpRequest",     "WorkExperienceMin":"-1",     "WorkExperienceMax":"-1",     "TabId":"0",     "SubordinateCount":"0",     "SaveType":"1",     "ReportObject":"测试人",     "RecruitCount":"1",     "QualifiCation":"信息描述",     "ProfessionalName":"",     "nowCurrentPageIndex":"0",     "Memo":"限500字",     "MasteryDegree":"1",     "MajorID":"-1",     "LanguageType":"-1",     "JobTypeID":"1050000,4000000,160000",     "JobTagCount":"8",     "JobStatus":"1",     "JobDescription":"职位描述",     "JobAllTagStr":"五险一金",     "IsViewHighEndUser":"false",     "IsFull":"true",     "FullTime":"false",     "DepName":"测试",     "Degree":"-1",     "CompanyID":"2234",     "CloseDate":"2016-01-12",     "AreaID":"530",     "AgeMin":"-1",     "AgeMax":"-1"     }).encode('utf-8') header={
       "Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",     "Accept-Encoding":"utf-8",     "User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0",     "Host":"h.highpin.cn",     "Content-Type":"application/x-www-form-urlencoded; charset=UTF-8",     "Referer":"http://h.highpin.cn/ManageJob/PubNewJob",     "Cookie":"XXXXX",     "Connection":"keep-alive"     } req = urllib.request.Request(url,postdata,header) r=urllib.request.urlopen(req) print(r.read().decode('utf-8'))

说明：cookie中的内容我给替换掉了，放上自己的cookie就可以了

 

Python3和Python2的变更，可以参考文章：http://blog.csdn.net/samxx8/article/details/21535901