使用请求库用python模拟ajax请求

Question

为什么request不下载此网页的响应？

#!/usr/bin/python

import requests

headers={ 'content-type':'application/x-www-form-urlencoded; charset=UTF-8',
     'Accept-Encoding': 'gzip, deflate',
     'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0',
     'Referer' : 'http://sportsbeta.ladbrokes.com/football',
    }

payload={'N': '4294966750',
     'facetCount_156%23327': '12',
     'facetCount_157%23325': '8',
     'form-trigger':'moreId',
     'moreId':'156%23327',
     'pageId':'p_football_home_page',
     'pageType':'EventClass',
     'type':'ajaxrequest'
     }

url='http://sportsbeta.ladbrokes.com/view/EventDetailPageComponentController'

r = requests.post(url, data=payload, headers=headers)

这些是我在Firebug中看到的POST的参数，在那里收到的响应包含一个列表（足球联赛），但是当我像这样运行python脚本时，什么也得不到。

（点击link左侧导航栏竞赛部分中的See All并查看Firebug中的XHR，可以在Firefox中看到请求。Firebug响应按预期显示HTML正文。）

有什么想法吗？我对有效载荷中%符号的处理是否会造成任何麻烦？

编辑：尝试使用会话

from requests import Request, Session

#turn post string into dict: 
def parsePOSTstring(POSTstr):
    paramList = POSTstr.split('&')
    paramDict = dict([param.split('=') for param in paramList])
    return paramDict

headers={'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0',
     'Referer' : 'http://sportsbeta.ladbrokes.com/football'
    }

#prep the data (POSTstr copied from Firebug raw source)
POSTstr = "moreId=156%23327&facetCount_156%23327=12&event=&N=4294966750&pageType=EventClass&
          pageId=p_football_home_page&type=ajaxrequest&eventIDNav=&removedSelectionNav=&
          currentSelectedId=&form-trigger=moreId"
payload = parsePOSTstring(POSTstr)

#end url
url='http://sportsbeta.ladbrokes.com/view/EventDetailPageComponentController'

#start a session to manage cookies, and visit football page first so referer agrees
s = Session()
s.get('http://sportsbeta.ladbrokes.com/football')
#now visit disired url with headers/data
r = s.post(url, data=payload, headers=headers)

#print output
print r.text #this is empty

工作卷曲度

curl 'http://sportsbeta.ladbrokes.com/view/EventDetailPageComponentController'
-H 'Cookie: JSESSIONID=DE93158F07E02DD3CC1CC32B1AA24A9E.ecomprodsw015;
    geoCode=FRA; 
    FLAGS=en|en|uk|default|ODDS|0|GBP;
    ECOM_BETA_SPORTS=1;
    PLAYED=4%7C0%7C0%7C0%7C0%7C0%7C0'
-H 'Referer: http://sportsbeta.ladbrokes.com/football'
-H 'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:27.0) 
    Gecko/20100101 Firefox/27.0'  
--data 'facetCount_157%23325=8&moreId=156%23327&
        facetCount_156%23327=12&event=&
        N=4294966750&
        pageType=EventClass&pageId=p_football_home_page&
        type=ajaxrequest&eventIDNav=&
        removedSelectionNav=&currentSelectedId=&
        form-trigger=moreId' --compressed

但这种卷曲是有效的。

Answer 1

下面是我能想到的最小的工作示例：

from requests import Session

session = Session()

# HEAD requests ask for *just* the headers, which is all you need to grab the
# session cookie
session.head('http://sportsbeta.ladbrokes.com/football')

response = session.post(
    url='http://sportsbeta.ladbrokes.com/view/EventDetailPageComponentController',
    data={
        'N': '4294966750',
        'form-trigger': 'moreId',
        'moreId': '156#327',
        'pageType': 'EventClass'
    },
    headers={
        'Referer': 'http://sportsbeta.ladbrokes.com/football'
    }
)

print response.text

你只是没有正确解码百分比编码的POST数据，所以#在实际POST数据中被表示为%23（例如156%23327应该是156#327）。