Python请求如何正确使用post请求的有效负载

Question

我做错了什么？我之前已经刮过网站，但这个有效载荷对我来说很困难。

from requests import session 
from bs4 import BeautifulSoup as bs 

payload = { 
    "p_flow_id" : 838 , 
    "p_flow_step_id": 4 , 
    "p_instance" :1282563643133 , 
    "p_page_submission_id" :4990502617229, 
    "p_request" : "" 
} 


with session() as c: 
    c.post('http://nid.usace.army.mil/cm_apex/f?p=838:4:0::NO/wwv_flow.accept', data=payload) 
    url = c.get('http://nid.usace.army.mil/cm_apex/f?p=838:4:0::NO/wwv_flow.accept') 
    html = url.content 
    soup = bs(html) 

Answer 1

你的第一个请求返回与404错误：

from bs4 import BeautifulSoup as bs 

payload = { 
    "p_flow_id" : 838 , 
    "p_flow_step_id": 4 , 
    "p_instance" :1282563643133 , 
    "p_page_submission_id" :4990502617229, 
    "p_request" : "" 
    } 


with session() as c: 
    print 'in' 
    r1 = c.post('http://nid.usace.army.mil/cm_apex/f?p=838:4:0::NO/wwv_flow.accept', data=payload) 
    print r1.status_code # 404 
    url = c.get('http://nid.usace.army.mil/cm_apex/f?p=838:4:0::NO/wwv_flow.accept') 
    html = url.content 
    soup = bs(html,'lxml') 
    print soup