我了WebResponse獲得Location頭一個問題:.NET HttpWebResponse不提供Location頭
private CookieContainer _cookieContainer = new CookieContainer();
...
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(uri);
webRequest.Method = "POST";
webRequest.Referer = "www.xxxxx.sk";
webRequest.Proxy = GetSystemProxy();
webRequest.AllowAutoRedirect = false;
webRequest.CookieContainer = _cookieContainer;
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.KeepAlive = false;
//webRequest.Expect = "Location";
當我在Firefox中使用篡改數據的插件 - 我得到了我想要的:
位置= http://www.xxxxx.sk?i9=3522a42d0207
但看HttpWebResponse.Headers
不包含此標頭(儘管90%的接收的頭的是相同的,在Firefox的情況下)
我試過設置。 Expect
強制服務器提供我的頭,但我得到錯誤417期望失敗。
爲什麼我要那個標題是,有一個會話ID的話,我確實需要進一步的請求的原因(網站具有雙重安全 - 餅乾+會話ID在URL)
我也不是什麼明白是默認HttpWebRequest
將遵循重定向,所以如果服務器發送301/302狀態代碼將發出一個新的請求來獲取資源使用位置標題。所以一旦獲取了這個最終資源,響應中將不再有Location標頭。但是,如果我將AllowAutoRedirect
設置爲false,爲什麼不顯示標題?
編輯:頭:
Mozilla request headers:
Host=prihlasenie.azet.sk
User-Agent=Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13
Accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language=en-us,en;q=0.5
Accept-Encoding=gzip,deflate
Accept-Charset=ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive=115
Connection=keep-alive
Referer=http://www.azet.sk/
Content-Type=application/x-www-form-urlencoded
Content-Length=64
POSTDATA=form%5Busername%5D=yyyyyyyyyy&form%5Bpassword%5D=zzzzzzzzzz
--
Mozilla response headers:
Status=Found - 302
Date=Fri, 14 Jan 2011 13:12:37 GMT
Server=Apache
Pragma=no-cache
Expires=Fri, 14 Jan 2011 13:12:37 +0000
Cache-Control=post-check=0, pre-check=0, no-cache, must-revalidate
Set-Cookie=AZetSecId=3a2f118910; expires=Fri, 28-Jan-2011 13:12:37 GMT; path=/; domain=.azet.sk
Location=http://www.azet.sk/?i9=6ffcf488a877
Vary=User-Agent,Accept-Encoding
X-Served-By=prihlasenieweb-04
Content-Encoding=gzip
Content-Length=1124
Keep-Alive=timeout=15, max=82
Connection=Keep-Alive
Content-Type=text/html
--
------------------------------------------------
---
HttpWebRequest headers:
{Referer: http://www.xxxx.sk
Content-Type: application/x-www-form-urlencoded
Host: prihlasenie.xxxx.sk
Content-Length: 59
Expect: 100-continue
Connection: Close
}
and I'm doing:
byte[] paramBytes = Encoding.ASCII.GetBytes(postParameters);
webRequest.ContentLength = paramBytes.Length;
using (Stream requestStream = webRequest.GetRequestStream())
{
requestStream.Write(paramBytes, 0, paramBytes.Length);
}
---
HttpWebResponse headers:
{Pragma: no-cache
Vary: User-Agent,Accept-Encoding
X-Served-By: prihlasenieweb-05
Connection: close
Content-Length: 2113
Cache-Control: post-check=0, pre-check=0, no-cache, must-revalidate
Content-Type: text/html
Date: Thu, 13 Jan 2011 20:56:21 GMT
Expires: Thu, 13 Jan 2011 20:56:21 +0000
Set-Cookie: xxxxSecId=b425262c2e; expires=Thu, 27-Jan-2011 20:56:21 GMT; path=/; domain=.xxxx.sk
Server: Apache
}
你爲何用「期待」頭呢?另一種選擇是cookieContainer在請求前未正確初始化。 – bestsss 2011-01-13 18:39:38