如何通过TCP连接到http代理？

我想弄清楚代理连接如何通过TCP工作。我已经开始下载stacksoft library并在远程服务器上安装Squid代理。如何通过TCP连接到http代理？

现在我试图通过c＃TcpClient连接到它。

CONNECT proxyjudge.iathao.com:80 HTTP/1.1 
HOST proxyjudge.iathao.com

它失败，错误代码400（我试过这几个变种，它总是失败）：

HTTP/1.0 400 Bad Request 
Server: squid/3.1.10 
Mime-Version: 1.0 
Date: Mon, 27 Aug 2012 13:25:54 GMT 
Content-Type: text/html 
Content-Length: 3295 
X-Squid-Error: ERR_INVALID_REQ 0 
Vary: Accept-Language 
Content-Language: en 
X-Cache: MISS from **** 
X-Cache-Lookup: NONE ****:*** 
Connection: close 

.... 

<h1>ERROR</h1> 
<h2>The requested URL could not be retrieved</h2> 
.... 

<div id="content"> 
<p><b>Invalid Request</b> error was encountered while trying to process the request:</p> 

<blockquote id="data"> 
<pre>CONNECT proxyjudge.iathao.com:80 HTTP/1.1 
HOST proxyjudge.iathao.com 

</pre> 
</blockquote> 

<p>Some possible problems are:</p> 
<ul> 
<li><p>Missing or unknown request method.</p></li> 
<li><p>Missing URL.</p></li> 
<li><p>Missing HTTP Identifier (HTTP/1.0).</p></li> 
<li><p>Request is too large.</p></li> 
<li><p>Content-Length missing for POST or PUT requests.</p></li> 
<li><p>Illegal character in hostname; underscores are not allowed.</p></li> 
<li><p>HTTP/1.1 <q>Expect:</q> feature is being asked from an HTTP/1.0 software.</p></li> 
</ul>

所以我

的连接是通过以下请求开已经遵循由firefox发送到wireshark的同一服务器的请求，它看起来像一个正常的请求，没有连接命令在望：

GET http://proxyjudge.iathao.com/ HTTP/1.1 
Host: proxyjudge.iathao.com 
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20100101 Firefox/13.0.1 
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 
DNT: 1 
Proxy-Connection: keep-alive 

====================================================== 

HTTP/1.0 200 OK 
Date: Mon, 27 Aug 2012 13:34:39 GMT 
Server: Apache 
X-Powered-By: PHP/5.3.15 
Content-Type: text/html 
X-Cache: MISS from **** 
X-Cache-Lookup: MISS from ****:**** 
Connection: close 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 
<head> 
<title>AZ Environment variables 1.04</title> 
</head> 
<body> 
<pre> 
HTTP_USER_AGENT = Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20100101 Firefox/13.0.1 
HTTP_HOST = proxyjudge.iathao.com 
REQUEST_URI =/
HTTP_CONNECTION = keep-alive 
REMOTE_PORT = 46153 
HTTP_ACCEPT_LANGUAGE = en-us,en;q=0.5 
HTTP_ACCEPT = text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 
REMOTE_ADDR = **** 
HTTP_CACHE_CONTROL = max-age=259200 
HTTP_ACCEPT_ENCODING = gzip, deflate 
REQUEST_METHOD = GET 
REQUEST_TIME = 1346074479 
</pre> 
</body> 
</html>

无处不在我读CONNECT是必要的，但在这里它会导致一个错误。如果不需要连接，我如何在密码保护的代理服务器上授权连接？

任何人都可以推荐关于此主题的好文章吗？

来源

2012-08-27 Arsen Zahray

您使用TcpClient而不是HttpWebRequest的具体原因是什么？ – SpaceghostAli

要了解http的工作方式 –

如何在将命令字符串传递给TcpClient时格式化命令字符串？你能发布你的C＃代码吗？ – SpaceghostAli

据我所知你应该只发出CONNECT命令到代理，并得到响应。不是HOST命令。如果确定，其他所有内容应该是针对上游服务器的合法HTTP。

来源

2012-08-27 21:35:05 EJP

如何通过TCP连接到http代理？

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