HTML页
<!DOCTYPE html>
<html>
<head>
<title></title>
<script type="text/javascript">
var ws;
function ToggleConnectionClicked() {
try {
var SOCKECT_ADDR = "ws://localhost:1818/chat";
ws = new WebSocket(SOCKECT_ADDR);
ws.onopen = function (event) { alert("已经与服务器建立了连接\r\n当前连接状态：" + this.readyState); };
ws.onmessage = function (event) { alert("接收到服务器发送的数据：\r\n" + event.data); };
ws.onclose = function (event) { alert("已经与服务器断开连接\r\n当前连接状态：" + this.readyState); };
ws.onerror = function (event) {alert("WebSocket异常！" + event.toString());};
} catch (ex) {
alert(ex.message);
}
};
function SendData() {
try {
ws.send("success");
} catch (ex) {
alert(ex.message);
}
};
function seestate() {
alert(ws.readyState);
}
</script>
</head>
<body>
<button id='ToggleConnection' type="button" οnclick='ToggleConnectionClicked();'>
连接服务器</button><br />
<br />
<button id='ToggleConnection' type="button" οnclick='SendData();'>
发送我的名字：beston</button><br />
<br />
<button id='ToggleConnection' type="button" οnclick='seestate();'>
查看状态</button><br />
<br />
</body>
</html>
server
using System;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Text.RegularExpressions;
using System.Security.Cryptography;
namespace WebSocketServer
{
class Program
{
static string byte_to_string(byte[] b)
{
string s = "";
foreach(byte _b in b)
{
s += _b.ToString();
}
return s;
}
static void Main(string[] args)
{
int port = 1818;
byte[] buffer = new byte[1024];
IPEndPoint localEP = new IPEndPoint(IPAddress.Any, port);
Socket listener = new Socket(localEP.Address.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
try
{
listener.Bind(localEP);
listener.Listen(10);
Console.WriteLine("等待客户端连接....");
Socket sc = listener.Accept();//接受一个连接
Console.WriteLine("接受到了客户端：" + sc.RemoteEndPoint.ToString() + "连接....");
//握手
int length = sc.Receive(buffer);//接受客户端握手信息
sc.Send(PackHandShakeData(GetSecKeyAccetp(buffer, length)));
Console.WriteLine("已经发送握手协议了....");
//接受客户端数据
Console.WriteLine("等待客户端数据....");
length = sc.Receive(buffer);//接受客户端信息
string clientMsg = AnalyticData(buffer, length);
Console.WriteLine("接受到客户端数据：" + clientMsg);
//发送数据
string sendMsg = "您好，" + clientMsg;
Console.WriteLine("发送数据：“" + sendMsg + "” 至客户端....");
sc.Send(PackData(sendMsg));
Console.WriteLine("演示Over!");
Console.Read();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
/// <summary>
/// 打包握手信息
/// </summary>
/// <param name="secKeyAccept">Sec-WebSocket-Accept</param>
/// <returns>数据包</returns>
private static byte[] PackHandShakeData(string secKeyAccept)
{
var responseBuilder = new StringBuilder();
responseBuilder.Append("HTTP/1.1 101 Switching Protocols" + Environment.NewLine);
responseBuilder.Append("Upgrade: websocket" + Environment.NewLine);
responseBuilder.Append("Connection: Upgrade" + Environment.NewLine);
responseBuilder.Append("Sec-WebSocket-Accept: " + secKeyAccept + Environment.NewLine + Environment.NewLine);
//如果把上一行换成下面两行，才是thewebsocketprotocol-17协议，但居然握手不成功，目前仍没弄明白！
//responseBuilder.Append("Sec-WebSocket-Accept: " + secKeyAccept + Environment.NewLine);
//responseBuilder.Append("Sec-WebSocket-Protocol: chat" + Environment.NewLine);
return Encoding.UTF8.GetBytes(responseBuilder.ToString());
}
/// <summary>
/// 生成Sec-WebSocket-Accept
/// </summary>
/// <param name="handShakeText">客户端握手信息</param>
/// <returns>Sec-WebSocket-Accept</returns>
private static string GetSecKeyAccetp(byte[] handShakeBytes, int bytesLength)
{
string handShakeText = Encoding.UTF8.GetString(handShakeBytes, 0, bytesLength);
string key = string.Empty;
Regex r = new Regex(@"Sec\-WebSocket\-Key:(.*?)\r\n");
Match m = r.Match(handShakeText);
if (m.Groups.Count != 0)
{
key = Regex.Replace(m.Value, @"Sec\-WebSocket\-Key:(.*?)\r\n", "$1").Trim();
}
byte[] encryptionString = SHA1.Create().ComputeHash(Encoding.ASCII.GetBytes(key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"));
return Convert.ToBase64String(encryptionString);
}
/// <summary>
/// 解析客户端数据包
/// </summary>
/// <param name="recBytes">服务器接收的数据包</param>
/// <param name="recByteLength">有效数据长度</param>
/// <returns></returns>
private static string AnalyticData(byte[] recBytes, int recByteLength)
{
if (recByteLength < 2) { return string.Empty; }
bool fin = (recBytes[0] & 0x80) == 0x80; // 1bit，1表示最后一帧
if (!fin)
{
return string.Empty;// 超过一帧暂不处理
}
bool mask_flag = (recBytes[1] & 0x80) == 0x80; // 是否包含掩码
if (!mask_flag)
{
return string.Empty;// 不包含掩码的暂不处理
}
int payload_len = recBytes[1] & 0x7F; // 数据长度
byte[] masks = new byte[4];
byte[] payload_data;
if (payload_len == 126)
{
Array.Copy(recBytes, 4, masks, 0, 4);
payload_len = (UInt16)(recBytes[2] << 8 | recBytes[3]);
payload_data = new byte[payload_len];
Array.Copy(recBytes, 8, payload_data, 0, payload_len);
}
else if (payload_len == 127)
{
Array.Copy(recBytes, 10, masks, 0, 4);
byte[] uInt64Bytes = new byte[8];
for (int i = 0; i < 8; i++)
{
uInt64Bytes[i] = recBytes[9 - i];
}
UInt64 len = BitConverter.ToUInt64(uInt64Bytes, 0);
payload_data = new byte[len];
for (UInt64 i = 0; i < len; i++)
{
payload_data[i] = recBytes[i + 14];
}
}
else
{
Array.Copy(recBytes, 2, masks, 0, 4);
payload_data = new byte[payload_len];
Array.Copy(recBytes, 6, payload_data, 0, payload_len);
}
for (var i = 0; i < payload_len; i++)
{
payload_data[i] = (byte)(payload_data[i] ^ masks[i % 4]);
}
return Encoding.UTF8.GetString(payload_data);
}
/// <summary>
/// 打包服务器数据
/// </summary>
/// <param name="message">数据</param>
/// <returns>数据包</returns>
private static byte[] PackData(string message)
{
byte[] contentBytes = null;
byte[] temp = Encoding.UTF8.GetBytes(message);
if (temp.Length < 126)
{
contentBytes = new byte[temp.Length + 2];
contentBytes[0] = 0x81;
contentBytes[1] = (byte)temp.Length;
Array.Copy(temp, 0, contentBytes, 2, temp.Length);
}
else if (temp.Length < 0xFFFF)
{
contentBytes = new byte[temp.Length + 4];
contentBytes[0] = 0x81;
contentBytes[1] = 126;
contentBytes[2] = (byte)(temp.Length & 0xFF);
contentBytes[3] = (byte)(temp.Length >> 8 & 0xFF);
Array.Copy(temp, 0, contentBytes, 4, temp.Length);
}
else
{
// 暂不处理超长内容
}
return contentBytes;
}
}
}
