[英]Grab data from password protected ASP website using Python's requests
我正在嘗試使用Python的請求獲取受密碼保護的ASP網站的全部內容。
ASP站點的程序員告訴我,使用PowerShell,他可以使用以下腳本獲取數據:
$c = $host.UI.PromptForCredential('Your Credentials', 'Enter Credentials','','')
$r = Invoke-WebRequest 'https://server.com/app/login.aspx' -SessionVariable my_session
$form = $r.Forms[0]
$form.fields['xUsername']=$c.UserName
$form.fields['xPassword']=$c.GetNetworkCredential().Password
$r = Invoke-WebRequest -Uri ("https://server.com/app/login.aspx?ReturnUrl=%2Fapp%2FgetData.aspx%3Ftype%3DGETDATA%26id%3D123") -WebSession $my_session -Method POST -Body $form.Fields
我正在嘗試使用python的請求庫來實現此目的,但似乎無法正常工作。 我沒有獲取數據,而是獲得了在嘗試不使用密碼進行訪問時通常會看到的HTML代碼。
import getpass
import requests
requests.packages.urllib3.disable_warnings()
import re
from bs4 import BeautifulSoup
user="my_username"
password=getpass.getpass()
data = {"xUsername":user, "xPassword": password}
with requests.Session() as s:
page = s.get('https://server.com/app/login.aspx',verify=False).content
soup = BeautifulSoup(page)
data["___VIEWSTATE"] = soup.select_one("#__VIEWSTATE")["value"]
data["__VIEWSTATEGENERATOR"] = soup.select_one("#__VIEWSTATEGENERATOR")["value"]
s.post('https://server.com/app/login.aspx', data=data)
open_page = s.post(
"https://server.com/app/login.aspx?ReturnUrl=/app/getData.aspx?type=GETDATA&id=123")
我究竟做錯了什么?
我發現以下問題:
在“表單數據”下找到的所有數據都必須包含在python請求中。 再次訪問Chrome並正常登錄該網站。 @Chrome:檢查>網絡>搜索login.asp>在底部,我找到了“表單數據”,在我看來,它是這樣的(在已解析的視圖上):
__EVENTTARGET:
__EVENTARGUMENT:
__VIEWSTATE:隨機長字符串
__VIEWSTATEGENERATOR:隨機十六進制數
__EVENTVALIDATION:隨機長字符串
xUsername:用戶
xPassword:密碼
btnLogin:登錄
因此,正確的python代碼如下所示:
import getpass
import requests
requests.packages.urllib3.disable_warnings()
from bs4 import BeautifulSoup
user="my_username"
password=getpass.getpass()
url = "https://server.com/app/login.aspx?ReturnUrl=%2fapp%2fgetData.aspx%3ftype%3dGETDATA%26id%3d123"
data = {"xUsername":user, "xPassword": password}
with requests.Session() as s:
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"}
r = s.get('https://server.com/app/login.aspx',verify=False,headers=headers)
soup = BeautifulSoup(r.content)
data["___VIEWSTATE"] = soup.select_one("#__VIEWSTATE")["value"]
data["__VIEWSTATEGENERATOR"] = soup.select_one("#__VIEWSTATEGENERATOR")["value"]
data["__EVENTTARGET"] = ""
data["__EVENTARGUMENT"] = ""
data["__EVENTVALIDATION"] = soup.select_one("#__EVENTVALIDATION")["value"]
data["btnLogin"] = "Login"
response = s.post(url,data=data, headers=headers, allow_redirects=True)
print response.content
我必須以編碼形式包含URL,否則我將從服務器收到一條錯誤消息,提示缺少一個參數,即:
url = "https://server.com/app/login.aspx?ReturnUrl=/app/getData.aspx?type=GETDATA&id=123"
... SAME SCRIPT AS ABOVE ...
>>> print response.url
https://server.com/app/getData.aspx?type=GETUSER
>>> print response.content
ERROR Some parameter is missing
也許有人知道無需解碼url的更好方法。
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