以朋友的web作业网站为例:

http://simpledating.sinaapp.com/

使用标准库中的urllib2可以对网页进行访问

GET:

先看看正常发出的GET请求:

代码如下:

#coding:utf-8
import urllib2
# 打开Debug Log 方便调试
httpHandler = urllib2.HTTPHandler(debuglevel=1)
httpsHandler = urllib2.HTTPSHandler(debuglevel=1)
opener = urllib2.build_opener(httpHandler, httpsHandler)
urllib2.install_opener(opener)

try:
    header = {
        ‘Accept‘:‘*/*‘,
        ‘Accept-Language‘:‘zh-CN,zh;q=0.8‘,
        ‘Connection‘:‘keep-alive‘,
        ‘Host‘:‘simpledating.sinaapp.com‘,
        ‘Origin‘:‘http://simpledating.sinaapp.com‘,
        ‘Referer‘:‘http://simpledating.sinaapp.com/‘,
        ‘User-Agent‘:‘Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36 SE 2.X MetaSr 1.0‘,
    }
    #添加header
    req = urllib2.Request(
                    url = ‘http://simpledating.sinaapp.com/‘,
                    headers = header
                )
    response = urllib2.urlopen(req)
    print response.read()
except urllib2.HTTPError, e:
        print ‘error‘, e.code

POST:

先看看正常发出的post请求:

可易看到post数据格式是有三个,哦这个网站还加了xsrf(跨站请求伪造),防止伪造的请求..

那我只好在请求data和cookies也伪造下吧

代码如下:

#coding:utf-8
import urllib
import urllib2

# 打开Debug Log 方便调试
httpHandler = urllib2.HTTPHandler(debuglevel=1)
httpsHandler = urllib2.HTTPSHandler(debuglevel=1)
opener = urllib2.build_opener(httpHandler, httpsHandler)
urllib2.install_opener(opener)


try:
    #data是要提交的数据 按照他要求的格式填
    data =  http://www.mamicode.com/{u‘_xsrf‘:u‘f65fb8fdd4134e1f815c7a10f37561f6‘,u‘place‘:u‘~‘, u‘content‘:u‘asdwqwt‘, u‘time‘:u‘9999/99/99 ab:cd‘}
    data = http://www.mamicode.com/urllib.urlencode(data)"color:#a5c261">‘Accept‘:‘*/*‘,
        # ‘Accept-Encoding‘:‘gzip,deflate,sdch‘,
        ‘Accept-Language‘:‘zh-CN,zh;q=0.8‘,
        ‘Connection‘:‘keep-alive‘,
        ‘Cookie‘:‘saeut=CkMPGlSn3wdyh1mEHBWpAg==; user=eGlvbmdiaWFv|1421041643|f368e242dd53c65621ee754688042ae8898c572b;_xsrf=f65fb8fdd4134e1f815c7a10f37561f6‘,
        ‘Host‘:‘simpledating.sinaapp.com‘,
        ‘Origin‘:‘http://simpledating.sinaapp.com‘,
        ‘Referer‘:‘http://simpledating.sinaapp.com/createBroadDating‘,
        ‘User-Agent‘:‘Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36 SE 2.X MetaSr 1.0‘,
        # post要加入的:
        ‘Content-Type‘:‘application/x-www-form-urlencoded; charset=UTF-8‘,
        ‘Content-Length‘:‘92‘,
        ‘X-Requested-With‘:‘XMLHttpRequest‘,
    }
    req = urllib2.Request(
                    url = ‘http://simpledating.sinaapp.com/createBroadDating‘,
                    data = data,
                    headers = header
                )
    response = urllib2.urlopen(req)
    print response.read()
except urllib2.HTTPError, e:
        print ‘error‘, e.code

返回结果如下:

D:\Python\python.exe D:/Users/Administrator/PycharmProjects/web/web.py
send: ‘POST /createBroadDating HTTP/1.1\r\nAccept-Encoding: identity\r\nOrigin: http://simpledating.sinaapp.com\r\nContent-Length: 92\r\nAccept-Language: zh-CN,zh;q=0.8\r\nConnection: close\r\nAccept: */*\r\nUser-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36 SE 2.X MetaSr 1.0\r\nHost: simpledating.sinaapp.com\r\nX-Requested-With: XMLHttpRequest\r\nCookie: saeut=CkMPGlSn3wdyh1mEHBWpAg==; user=eGlvbmdiaWFv|1421041643|f368e242dd53c65621ee754688042ae8898c572b;_xsrf=f65fb8fdd4134e1f815c7a10f37561f6\r\nReferer:http://simpledating.sinaapp.com/createBroadDating\r\nContent-Type: application/x-www-form-urlencoded; charset=UTF-8\r\n\r\ncontent=asdwqwt&_xsrf=f65fb8fdd4134e1f815c7a10f37561f6&place=%7E&time=9999%2F99%2F99+ab%3Acd‘
reply: ‘HTTP/1.1 200 OK\r\n‘
header: Server: nginx/1.4.4
header: Date: Mon, 12 Jan 2015 06:49:43 GMT
header: Content-Type: text/html; charset=UTF-8
header: Content-Length: 7
header: Connection: close
header: via: yq34.pyruntime
success

可见post成功了

用Python向网站发出Post/Get请求