[英]How to connect to HTTPS proxy?
我正在嘗試使用套接字通過代理連接到HTTPS服務器。 據我所知,在使用HTTP代理時,應該將套接字連接到它,然后與它進行交互,因為它是真正的服務器。 使用HTTP這種方法可行,但HTTPS不是。 為什么?
這是連接到HTTPS服務器的簡單程序
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
時成功連接。 但是當我將它們設置為127.0.0.1:8888(localhost上的fiddler代理)時,它不起作用。 程序掛起在sslStream.AuthenticateAsClient(host);
為什么? Fiddler支持HTTPS(瀏覽器可以通過它連接)。
PS不,我不能在我的情況下使用HttpWebRequest
。
管理自己解決它。 這是解決方案:
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();
}
}
}
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