無法從.aspx登錄頁面使用Python和請求模塊獲得所需響應

Question

我一直在嘗試登錄到.aspx站點（https://web.iress.com.au/html/LogonForm.aspx - 用於源/初始cookie引用），它使用javascript函數__doPostBack(eventTarget, eventArgument)來提交形式（非常有限的JavaScript知識 - 所以最好的猜測）。

我目前對HTTP請求的理解是，在表單的上下文中，它們主要是POST類型的請求。我用Chrome瀏覽器嗅出請求頭和形成時，我的憑據（爲了安全起見）不輸入使用的數據和有如下幾點：

Remote Address:##BLANKEDOUT## 
Request URL:https://web.iress.com.au/html/logon.aspx 
Request Method:POST 
Status Code:302 Found 

**Request Headers** 
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 
Accept-Encoding:gzip,deflate 
Accept-Language:en-US,en;q=0.8 
Cache-Control:no-cache 
Connection:keep-alive 
Content-Length:585 
Content-Type:application/x-www-form-urlencoded 
Cookie:ASP.NET_SessionId=##SESSION ID STRING## 
Host:web.iress.com.au 
Origin:https://web.iress.com.au 
Pragma:no-cache 
Referer:https://web.iress.com.au/html/LogonForm.aspx 
User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/##ADDRESS## Safari/537.36 

    **Form Data** 
    __EVENTTARGET: 
    __EVENTARGUMENT: 
    __VIEWSTATE: ##VIEWSTATE STRING## 
    __VIEWSTATEGENERATOR:##VIEWSTATEGENERATOR KEY## 
    __PREVIOUSPAGE: ##PREVIOSUPAGE STRING##  
    __EVENTVALIDATION: ##STRING## 
    fu:LogonForm.aspx 
    su:Default.aspx 
    un: # Would be my username if i had typed it in 
    pw: # Would be password 
    ImageButton1.x:45 # These two values change depending on where i click the submit button 
    ImageButton1.y:13 

，這是我使用的嘗試代碼登錄：

from requests import session 

payload = { 
    '__EVENTTARGET'    : '', 
    '__EVENTARGUMENT'   : '', 
    '__VIEWSTATE'    : '##STRING FOUND FROM CHROME SNIFF##', 
    '__VIEWSTATEGENERATOR'  : '##STRING FOUND FROM CHROME SNIFF##', 
    '__PREVIOUSPAGE'   : '##STRING FOUND FROM CHROME SNIFF##', 
    '__EVENTVALIDATION'   : '##STRING FOUND FROM CHROME SNIFF##', 
    'fu'      : 'LogonForm.aspx', 
    'su'      : 'Default.aspx', 
    'un'      : 'myuser@company', 
    'pw'      : 'mypassword', 
    'ImageButton1.x'   : '0', 
    'ImageButton1.y'   : '0' 
    } 

requestheaders = { 
    'Accept'     :  'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8', 
    'Accept-Encoding'   : 'gzip,deflate', 
    'Accept-Language'   : 'en-US,en;q=0.8', 
    'Cache-Control'    : 'no-cache', 
    'Connection'    : 'keep-alive', 
    'Content-Type'    : 'application/x-www-form-urlencoded', 
    'Host'      : 'web.iress.com.au', 
    'Origin'     : 'https://web.iress.com.au', 
    'Cookie'     : '', 
    'Pragma'     : 'no-cache', 
    'Referer'     : 'https://web.iress.com.au/html/LogonForm.aspx', 
    'User-Agent'    : 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/##ADRESSS AS ABOVE## Safari/537.36' 

    } 

with session() as sesh: 

    LOGINURL = 'https://web.iress.com.au/html/LogonForm.aspx' 
    sesh.get(LOGINURL) #Get request to get the session ID cookie 
    sessionID = sesh.cookies['ASP.NET_SessionId'] #Grab session ID value 
    sessionIDname = 'ASP.NET_SessionId=' 
    sessionIDheader = str(sessionIDname + sessionID) #Prepare session ID header 
    requestheaders['Cookie'] = sessionIDheader # Add session ID header to requestheaders dictionary 



    response = sesh.post('https://web.iress.com.au/html/LogonForm.aspx', data=payload, headers=requestheaders) 


    print(response.headers) 
    print(response.content) 

我似乎得到的是頁面（https://web.iress.com.au/html/LogonForm.aspx）的內容和它的頭文件作爲響應的來源。我不確定它是否與__VARIABLES有任何關係，但它們似乎沒有變化，previouspage是例外。我可能需要提取這些__VARIABLES才能在我的請求標題中使用它們嗎？

Answer 1

您發佈的網址錯誤;您自己的數據會將表單帖子顯示爲https://web.iress.com.au/html/logon.aspx，但您將發佈到/LogonForm.aspx。

請注意，session對象將爲您處理cookie，請勿自行設置Cookie標頭。你應該避免設置Host，Origin和Content-Type標題，並且Cache-Control,Accept*標題和Pragma不會有任何影響如何工作。