获取StatusCode 401的响应内容

Question

我试图建立一个连接到一个服务器，发送401身份验证错误的所有我的请求以及正常的html响应。例如 但是，我也想阅读随同发送的HTML响应，以便我可以解析该响应。使用LiveHTTPHeaders捕获示例头交换：显然，内容长度不为零。 Firefox显示它是JavaScript。

https://172.31.1.251:1003/fgtauth?73e285357b2dc5cc 
Request: 
GET /fgtauth?73e285357b2dc5cc HTTP/1.1 
Host: 172.31.1.251:1003 
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1b4) Gecko/20090423 Firefox/3.5b4 (.NET CLR 3.5.30729) 
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: 300 
Connection: keep-alive 

Response: 
HTTP/1.x 401 Unauthorized 
WWW-Authenticate: Fortigate 
Content-Length: 1091 
Connection: Keep-Alive 
Cache-Control: no-cache 
Content-Type: text/html 

在这一点上，形式在Firefox打开，要求我输入我的用户名和密码。

https://172.31.1.251:1003/ 

Request: 
POST/HTTP/1.1 
Host: 172.31.1.251:1003 
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1b4) Gecko/20090423 Firefox/3.5b4 (.NET CLR 3.5.30729) 
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: 300 
Connection: keep-alive 
Referer: https://172.31.1.251:1003/ 
Content-Type: application/x-www-form-urlencoded 
Content-Length: 93 
magic=73e285357b2dc5cc&username=uuxx&password=xxuu&4Tredir=http%3A%2F%2Fwww.google.com%2F 


Response: 
HTTP/1.x 401 Unauthorized 
WWW-Authenticate: Fortigate 
Content-Length: 924 
Connection: Keep-Alive 
Cache-Control: no-cache 
Content-Type: text/html 

此时我被重定向到另一个URL。但是，我的问题是如何获得与401未授权一起发送的长度为924的内容，因为该内容将帮助我进一步完成我想要做的事情。但是非常行：

WebResponse loginResponse = loginRequest.GetResponse(); 

引发异常。

我将不胜感激任何建议，以帮助我获得实际内容。

谢谢。

Answer 1

你需要阅读WebException的Response财产，像这样：

WebResponse loginResponse; 
try { 
    loginResponse = loginRequest.GetResponse(); 
} catch(WebException ex) { 
    if (ex.Status == WebExceptionStatus.ProtocolError) { 
     loginResponse = ex.Response; 
    } else 
     throw; 
} 

//Do something with the response, and remember to dispose it.