如何连接到HTTPS代理？

我正在尝试使用套接字通过代理连接到HTTPS服务器。 据我所知，当使用HTTP代理时，应该将套接字连接到它，然后与它进行交互，因为它是真正的服务器。 使用HTTP这种方法可行，但HTTPS不是。 为什么？

这是连接到HTTPS服务器的简单程序

using System; using System.Text; using System.Net.Sockets; using System.Net.Security; namespace SslTcpClient { public class SslTcpClient { public static void Main(string[] args) { string host = "encrypted.google.com"; string proxy = "127.0.0.1";//host; int proxyPort = 8888;//443; // Connect socket TcpClient client = new TcpClient(proxy, proxyPort); // Wrap in SSL stream SslStream sslStream = new SslStream(client.GetStream()); sslStream.AuthenticateAsClient(host); // Send request byte[] request = Encoding.UTF8.GetBytes(String.Format("GET https://{0}/ HTTP/1.1\r\nHost: {0}\r\n\r\n", host)); sslStream.Write(request); sslStream.Flush(); // Read response byte[] buffer = new byte[2048]; int bytes; do { bytes = sslStream.Read(buffer, 0, buffer.Length); Console.Write(Encoding.UTF8.GetString(buffer, 0, bytes)); } while (bytes != 0); client.Close(); Console.ReadKey(); } } } 

它在proxy = host和proxyPort = 443时成功连接。 但是当我将它们设置为127.0.0.1:8888（localhost上的fiddler代理）时，它不起作用。 程序挂起在sslStream.AuthenticateAsClient(host); 为什么？ Fiddler支持HTTPS（浏览器可以通过它连接）。

PS不，我不能在我的情况下使用HttpWebRequest 。

Answer 1

管理自己解决它。 这是解决方案：

 using System; using System.Text; using System.Net.Sockets; using System.Net.Security; namespace SslTcpClient { public class SslTcpClient { public static void Main(string[] args) { string host = "encrypted.google.com"; string proxy = "127.0.0.1";//host; int proxyPort = 8888;//443; byte[] buffer = new byte[2048]; int bytes; // Connect socket TcpClient client = new TcpClient(proxy, proxyPort); NetworkStream stream = client.GetStream(); // Establish Tcp tunnel byte[] tunnelRequest = Encoding.UTF8.GetBytes(String.Format("CONNECT {0}:443 HTTP/1.1\r\nHost: {0}\r\n\r\n", host)); stream.Write(tunnelRequest , 0, tunnelRequest.Length); stream.Flush(); // Read response to CONNECT request // There should be loop that reads multiple packets bytes = stream.Read(buffer, 0, buffer.Length); Console.Write(Encoding.UTF8.GetString(buffer, 0, bytes)); // Wrap in SSL stream SslStream sslStream = new SslStream(stream); sslStream.AuthenticateAsClient(host); // Send request byte[] request = Encoding.UTF8.GetBytes(String.Format("GET https://{0}/ HTTP/1.1\r\nHost: {0}\r\n\r\n", host)); sslStream.Write(request, 0, request.Length); sslStream.Flush(); // Read response do { bytes = sslStream.Read(buffer, 0, buffer.Length); Console.Write(Encoding.UTF8.GetString(buffer, 0, bytes)); } while (bytes != 0); client.Close(); Console.ReadKey(); } } }