C＃Web请求/服务器不可用错误/ HTTP头

当我在特定的URL上运行HTTPWebRequest时，它返回503（服务器不可用）。这里是我的代码：C＃Web请求/服务器不可用错误/ HTTP头

 webClient.Headers[HttpRequestHeader.UserAgent] = _userAgent; 
     webClient.Headers[HttpRequestHeader.AcceptEncoding] = "gzip, deflate"; 
     webClient.Headers[HttpRequestHeader.Accept] = "Accept: application/x-ms-application, image/jpeg, application/xaml+xml, image/gif, image/pjpeg, application/x-ms-xbap, */*"; 
     webClient.Headers[HttpRequestHeader.Cookie] = "searchState=WA"; 

     byte[] firstResponse = webClient.DownloadData(URL);

下面是当我要求在IE页面什么是发送到浏览器（根据小提琴手）：

GET http://www.[url].com/[url] HTTP/1.1 
Accept: application/x-ms-application, image/jpeg, application/xaml+xml, image/gif, image/pjpeg, application/x-ms-xbap, */* 
Accept-Language: en-US 
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; Media Center PC 6.0; .NET4.0C; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0E) 
Accept-Encoding: gzip, deflate 
Proxy-Connection: Keep-Alive 
Host: www.[url].com 
Cookie: searchState=WA

还有什么我需要添加到我的码？非常感谢。

编辑：这里是响应头：

HTTP/1.0 200 OK 
Date: Fri, 21 Jan 2011 04:02:33 GMT 
Server: Apache-Coyote/1.1 
Cache-Control: no-cache 
Pragma: no-cache 
Expires: Thu, 01 Jan 1970 00:00:00 GMT 
Content-Type: text/html;charset=UTF-8 
Set-Cookie: JSESSIONID=39EFAAA14B9C6E0384631007966B7CB8; Path=/ 
Set-Cookie: searchState=WA; Expires=Sun, 20-Feb-2011 04:02:33 GMT; Path=/ 
Set-Cookie: search_tab=R; Path=/ 
X-Cache: MISS from 200.157.247.7 
Proxy-Connection: close 
Content-Length: 26987

来源

2011-01-21 alpheus

很可能你的请求实际上得到通过。 503响应代码通常意味着服务器超载或服务器部分运行不正常。尝试在同一台机器上在IE中加载页面，看看你是否得到相同的响应。

来源

2011-01-21 04:24:24 squillman

当我在IE中打开它时，页面加载就好了。 – alpheus 2011-01-21 04:34:37

C＃Web请求/服务器不可用错误/ HTTP头

回答

相关问题