我想在我的Windows窗体或WPF应用程序中使用WebSockets。是否有支持WebSockets实现的.NET控件？还是有任何开源项目开始呢？
支持WebSockets的Java客户端的开源解决方案也可以帮助我。
解决方法
这是一个快速的第一次传递Java代码到C#。不支持SSL模式，只是经过了很少的测试，但它是一个开始。
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.sockets;
using System.Text;
public class WebSocket
{
private Uri mUrl;
private TcpClient mClient;
private NetworkStream mStream;
private bool mHandshakeComplete;
private Dictionary<string,string> mHeaders;
public WebSocket(Uri url)
{
mUrl = url;
string protocol = mUrl.Scheme;
if (!protocol.Equals("ws") && !protocol.Equals("wss"))
throw new ArgumentException("Unsupported protocol: " + protocol);
}
public void SetHeaders(Dictionary<string,string> headers)
{
mHeaders = headers;
}
public void Connect()
{
string host = mUrl.DnsSafeHost;
string path = mUrl.PathAndQuery;
string origin = "http://" + host;
mClient = CreateSocket(mUrl);
mStream = mClient.GetStream();
int port = ((IPEndPoint)mClient.Client.RemoteEndPoint).Port;
if (port != 80)
host = host + ":" + port;
StringBuilder extraHeaders = new StringBuilder();
if (mHeaders != null)
{
foreach (keyvaluePair<string,string> header in mHeaders)
extraHeaders.Append(header.Key + ": " + header.Value + "\r\n");
}
string request = "GET " + path + " HTTP/1.1\r\n" +
"Upgrade: WebSocket\r\n" +
"Connection: Upgrade\r\n" +
"Host: " + host + "\r\n" +
"Origin: " + origin + "\r\n" +
extraHeaders.ToString() + "\r\n";
byte[] sendBuffer = Encoding.UTF8.GetBytes(request);
mStream.Write(sendBuffer,sendBuffer.Length);
StreamReader reader = new StreamReader(mStream);
{
string header = reader.ReadLine();
if (!header.Equals("HTTP/1.1 101 Web Socket Protocol Handshake"))
throw new IOException("Invalid handshake response");
header = reader.ReadLine();
if (!header.Equals("Upgrade: WebSocket"))
throw new IOException("Invalid handshake response");
header = reader.ReadLine();
if (!header.Equals("Connection: Upgrade"))
throw new IOException("Invalid handshake response");
}
mHandshakeComplete = true;
}
public void Send(string str)
{
if (!mHandshakeComplete)
throw new InvalidOperationException("Handshake not complete");
byte[] sendBuffer = Encoding.UTF8.GetBytes(str);
mStream.WriteByte(0x00);
mStream.Write(sendBuffer,sendBuffer.Length);
mStream.WriteByte(0xff);
mStream.Flush();
}
public string Recv()
{
if (!mHandshakeComplete)
throw new InvalidOperationException("Handshake not complete");
StringBuilder recvBuffer = new StringBuilder();
BinaryReader reader = new BinaryReader(mStream);
byte b = reader.ReadByte();
if ((b & 0x80) == 0x80)
{
// Skip data frame
int len = 0;
do
{
b = (byte)(reader.ReadByte() & 0x7f);
len += b * 128;
} while ((b & 0x80) != 0x80);
for (int i = 0; i < len; i++)
reader.ReadByte();
}
while (true)
{
b = reader.ReadByte();
if (b == 0xff)
break;
recvBuffer.Append(b);
}
return recvBuffer.ToString();
}
public void Close()
{
mStream.dispose();
mClient.Close();
mStream = null;
mClient = null;
}
private static TcpClient CreateSocket(Uri url)
{
string scheme = url.Scheme;
string host = url.DnsSafeHost;
int port = url.Port;
if (port <= 0)
{
if (scheme.Equals("wss"))
port = 443;
else if (scheme.Equals("ws"))
port = 80;
else
throw new ArgumentException("Unsupported scheme");
}
if (scheme.Equals("wss"))
throw new NotImplementedException("SSL support not implemented yet");
else
return new TcpClient(host,port);
}
}