我想在我的Windows Forms或WPF应用程序中使用WebSocket。是否已经有支持WebSocket的.NET控件实现?或者是否已经有任何开源项目开始处理它?
一个支持WebSocket的Java客户端的开源解决方案也可以帮助我。
这是将那段Java代码转换为C#的快速首次尝试。不支持SSL模式,且仅进行了少量测试,但这是一个开始。
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, 0, 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, 0, 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);
}
}
现在,SuperWebSocket还包括一个WebSocket客户端实现 SuperWebSocket 项目主页
其他的.NET客户端实现包括:
.NET 4.5将会支持WebSockets,详见这里。该链接还包含了一个使用System.Net.WebSockets.WebSocket类的示例。
另一个选择:XSockets.Net,已经实现了服务器和客户端。
可以通过以下方式安装服务器:
PM> Install-Package XSockets
或者通过以下方式安装客户端:
PM> Install-Package XSockets.Client
3.0.4
。最近,互操作性桥梁和实验室中心发布了WebSockets协议规范的两个草案(使用托管代码)的原型实现:
draft-hixie-thewebsocketprotocol-75 和 draft-hixie-thewebsocketprotocol-76
该原型可以在HTML5实验室找到。我在这篇博客文章中分享了我找到的所有信息(截至目前),以及如何使用WCF完成此操作的代码片段。
mStream = new SslStream(mClient.GetStream());
并添加了mStream.AuthenicateAsClient(host);
,这就是 SSL 支持所需的全部内容。 - primo