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也許我迫切需要一隻手了。C#的WebSocket服務器未燒製的onmessage事件在HTML5
我目前有關於使用C#和HTML5的WebSocket服務器有問題。它不是在html5中觸發我的onmessage()事件。它打開套接字連接並觸發onopen()事件。但是,一旦建立連接,它將繼續關閉連接。這裏是我的簡單的代碼:
服務器(C#):
using System;
using System.Collections.Generic;
using System.Net.Sockets;
using System.Net;
using System.IO;
using System.Security.Cryptography;
using System.Threading;
namespace ConsoleApplication1
{
class Program
{
public Socket ListenerSocker { get; private set; }
static IPEndPoint ipLocal;
static Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
static private string guid = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
static void Main(string[] args)
{
serverSocket.Bind(new IPEndPoint(IPAddress.Any, 8080));
//serverSocket.Listen(128);
serverSocket.Listen(200);
serverSocket.BeginAccept(null, 0, OnAccept, null);
Console.Read();
}
private static void OnClientConnect()
{
serverSocket.BeginAccept(null, 0, OnAccept, null);
}
private static void OnAccept(IAsyncResult result)
{
byte[] buffer = new byte[1024];
Socket client = null;
string headerResponse = "";
if (serverSocket != null && serverSocket.IsBound)
{
client = serverSocket.EndAccept(result);
var i = client.Receive(buffer);
headerResponse = (System.Text.Encoding.UTF8.GetString(buffer)).Substring(0, i);
// write received data to the console
Console.WriteLine(headerResponse);
}
if (client != null)
{
/* Handshaking and managing ClientSocket */
var key = headerResponse.Replace("ey:", "`")
.Split('`')[1] // dGhlIHNhbXBsZSBub25jZQ== \r\n .......
.Replace("\r", "").Split('\n')[0] // dGhlIHNhbXBsZSBub25jZQ==
.Trim();
// key should now equal dGhlIHNhbXBsZSBub25jZQ==
var test1 = AcceptKey(ref key);
var newLine = "\r\n";
var response = "HTTP/1.1 101 Switching Protocols" + newLine
+ "Upgrade: websocket" + newLine
+ "Connection: Upgrade" + newLine
+ "Sec-WebSocket-Accept: " + test1 + newLine + newLine
+ "Sec-WebSocket-Key: " + test1 + newLine + newLine
+ "Sec-WebSocket-Key: " + test1 + newLine + newLine
//+ "Sec-WebSocket-Protocol: chat, superchat" + newLine
//+ "Sec-WebSocket-Version: 13" + newLine
;
// which one should I use? none of them fires the onopen method
client.Send(System.Text.Encoding.UTF8.GetBytes(response));
var i = client.Receive(buffer); // wait for client to send a message
// once the message is received decode it in different formats
Console.WriteLine(Convert.ToBase64String(buffer).Substring(0, i));
/*
Console.WriteLine("\n\nPress enter to send data to client");
Console.Read();
*/
var subA = SubArray<byte>(buffer, 0, i);
Console.WriteLine("***SUBA****:"+subA);
Console.WriteLine("TEST");
client.Send(subA);
// Thread.Sleep(10000);//wait for message to be send
// OnClientConnect();
}
}
public static T[] SubArray<T>(T[] data, int index, int length)
{
T[] result = new T[length];
Array.Copy(data, index, result, 0, length);
Console.WriteLine(result);
return result;
}
private static string AcceptKey(ref string key)
{
string longKey = key + guid;
byte[] hashBytes = ComputeHash(longKey);
return Convert.ToBase64String(hashBytes);
}
static SHA1 sha1 = SHA1CryptoServiceProvider.Create();
private static byte[] ComputeHash(string str)
{
return sha1.ComputeHash(System.Text.Encoding.ASCII.GetBytes(str));
}
}
}
客戶端(HTML5):
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/javascript">
function connect() {
var ws = new WebSocket("ws://localhost:8080");
console.log(ws);
ws.onopen = function() {
alert("About to send data");
ws.send("test"); // I WANT TO SEND THIS MESSAGE TO THE SERVER!!!!!!!!
alert("Message sent!");
};
ws.onmessage = function (evt) {
alert("About to receive data");
var received_msg = evt.data;
alert("Message received = "+received_msg);
};
ws.onclose = function() {
// websocket is closed.
alert("Connection is closed...");
};
};
function send(){
}
</script>
</head>
<body style="font-size:xx-large" >
<div>
<a href="#" onclick="connect()">Click here to start</a></div>
</body>
</html>
我能得到這個:
alert("About to send data");
這:
alert("Message sent!");
但之後,連接關閉。我也可以檢查服務器是否從客戶端接收數據。問題是,一旦我將數據從服務器發送到客戶端,爲了能夠返回客戶端給我的內容,連接突然關閉。可能是什麼問題?
是啊,我相信我有數據成幀 – Charmie
我不能看到它在你的示例代碼。每個傳入消息都需要一些前導字節,然後轉換剩餘的字節。每個傳出消息都需要添加一些前導字節。 – simonc
你有沒有我可以參考的實際示例代碼?我很難理解這個數據框架 – Charmie