Python:尝试使用请求POST表单

我正在尝试使用Python登录网站进行一些刮擦,并请求库,我正在尝试以下操作(这不工作):

import requests
headers = {'User-Agent': 'Mozilla/5.0'}
payload = {'username':'niceusername','password':'123456'}

In [12]: r = requests.post('https://admin.example.com/login.php',headers=headers,data=payload)

但nada,重定向到登录页面.我需要打开sesson吗?我做错了POST请求,我需要加载cookies吗?
还是自动执行会话?
我迷失在这里,需要一些帮助和解释.

我正在尝试登录的网站是php,是否需要“捕获set-cooki并设置cookie头”?如果是这样
我不知道该怎么做
网页是一个带有以下内容的表单(如果有帮助):
输入:用户名“密码”
‘id’:’myform’,’action’:“login.php

一些额外的信息,也许你可以看到我在这里失踪..

In [13]: r.headers
Out[13]: CaseInsensitiveDict({'content-encoding': 'gzip', 'transfer-encoding': 'chunked',
 'set-cookie': 'PHPSESSID=v233mnt4malhed55lrpc5bp8o1; path=/',
  'expires': 'Thu, 19 Nov 1981 08:52:00 GMT', 'vary': 'Accept-Encoding', 'server': 'nginx',
   'connection': 'keep-alive', 'pragma': 'no-cache',
    'cache-control': 'no-store, no-cache, must-revalidate, post-check=0, pre-check=0',
     'date': 'Tue, 24 Dec 2013 10:50:44 GMT', 'content-type': 'text/html'})

In [14]: r.cookies
Out[14]: <<class 'requests.cookies.RequestsCookieJar'>[Cookie(version=0, name='PHPSESSID',
 value='v233mnt4malhed55lrpc5bp8o1', port=None, port_specified=False, domain='admin.example.com',
  domain_specified=False, domain_initial_dot=False, path='/', path_specified=True, secure=False,
   expires=None, discard=True, comment=None, comment_url=None, rest={}, rfc2109=False)]>

我真的很感激帮助,
谢谢!

更新,回答感谢atupal:

    import requests

headers = {'User-Agent': 'Mozilla/5.0'}
payload = {'username':'usr','pass':'123'}
link    = 'https://admin.example.com/login.php'
session = requests.Session()
resp    = session.get(link,headers=headers)
# did this for first to get the cookies from the page, stored them with next line:
cookies = requests.utils.cookiejar_from_dict(requests.utils.dict_from_cookiejar(session.cookies))
resp    = session.post(link,headers=headers,data=payload,cookies =cookies)
#used firebug to check POST data, password, was actually 'pass', under 'net' in param.  
#and to move forward from here after is:
session.get(link)
最佳答案
您可以使用Session对象

import requests
headers = {'User-Agent': 'Mozilla/5.0'}
payload = {'username':'niceusername','password':'123456'}

session = requests.Session()
session.post('https://admin.example.com/login.php',headers=headers,data=payload)
# the session instance holds the cookie. So use it to get/post later.
# e.g. session.get('https://example.com/profile')

转载注明原文:Python:尝试使用请求POST表单 - 代码日志