Windows 8 Store Apps Learning (63) Communication: WebSocket

Introduced

Re-imagine the Windows 8 Store Apps Communication

Socket-do Text communication with WebSocket server

Socket-Do Stream (Binary) communication with WebSocket server

Example

WebSocket Service-side

Webserver/websocketserver.ashx.cs

* * * WebSocket Protocol Server * * need to enable WebSocket protocol in IIS: Control Panel-> programs and features-> enable or turn off Windows features-> open IIS WebSocket protocol
* * using System;
Using System.IO;
Using System.Net.WebSockets;
Using System.Text;
Using System.Threading;
    
Using System.Web; Namespace WebServer {public class Websocketserver:ihttphandler {//The maximum size of the buffer to receive data private int _
    
        MaxBufferSize = 64 * 1024; public void ProcessRequest (HttpContext context) {try {//HTTPCONTEXT.ACC Eptwebsocketrequest ()-Accepts a WebSocket request context.
                    Acceptwebsocketrequest (Async wscontext =>//Aspnetwebsocketcontext {try
                        {byte[] Receivebuffer = new Byte[_maxbuffersize];
    
                        arraysegment<byte> buffer = new arraysegment<byte> (receivebuffer); Aspnetwebsocketcontext.websocket-Gets the WEBSO of the current contextCket object WebSocket socket = Wscontext.websocket; The HTTP handshake completes the IF (socket). state = = Websocketstate.open) {var outputstring = "WebSocket connecte
                            D: "+ DateTime.Now.ToString (" Mm:ss ");
    
                            arraysegment<byte> OutputBuffer = new Arraysegment<byte> (Encoding.UTF8.GetBytes (outputstring)); Websocket.sendasync ()-Send data//Websocketmessagetype.text-The number of text sent According to//websocketmessagetype.binary-Sent is binary data await socket.
                        SendAsync (OutputBuffer, Websocketmessagetype.text, True, Cancellationtoken.none); }//HTTP handshake complete while (socket. state = = Websocketstate.open) {//Websocket.receiveasync ()- Receives the data, returns the Websocketreceiveresult object Websocketreceiveresult Receiveresult = await socket.
    
                            Receiveasync (buffer, cancellationtoken.none); Websocketreceiveresult.messagetype-type of data received (Websocketmessagetype enumeration)//Websocketmes
                            Sagetype.text-Received text data//websocketmessagetype.binary-received binary data Websocketmessagetype.close-received a WebSocket shutdown message from the client if (receiveresult.message Type = = Websocketmessagetype.close) {//Websocket.closeasync ( )-Closes the WebSocket await socket.
                                    Closeasync (ReceiveResult.CloseStatus.GetValueOrDefault (),
    
                     Receiveresult.closestatusdescription, Cancellationtoken.none);           Return
    
                            int offset = Receiveresult.count; 
                            Websocketreceiveresult.endofmessage-whether the message is fully received while (Receiveresult.endofmessage = = False) {//Websocket.receiveasync ()-Receive data, return Websocketreceiveresul T object Receiveresult = await socket.
                                Receiveasync (New arraysegment<byte> (Receivebuffer, offset, _maxbuffersize-offset), Cancellationtoken.none);
                            Offset + + Receiveresult.count; //Receive Text data if (Receiveresult.messagetype = = Websocketmessage Type.text) {String receivedtext = Encoding.UTF8.GetString (rec
                                Eivebuffer, 0, offset); String sendtext = "Server toClient: \ "" + Receivedtext + "" "; Send text data to client arraysegment<byte> OutputBuffer = new Arraysegment<byte> (Encodin G.utf8.
                                GetBytes (SendText)); Await socket.
                            SendAsync (OutputBuffer, Websocketmessagetype.text, True, Cancellationtoken.none); //Receive binary data else if (Receiveresult.messagetype = = Websocketmessag Etype.binary) {String sendtext = "Server to client:binary Me
    
                                Ssage received, size: "+ receiveresult.count + bytes"; Send text data to client arraysegment<byte> OutputBuffer = new Arraysegment<byte> (Encodin G.utf8.
                                GetBytes (SendText)); Await socket.
       SendAsync (OutputBuffer, Websocketmessagetype.text, True, Cancellationtoken.none);                     catch (Exception ex)
            {
                            
                    }
                }); \ catch (Exception ex) {}} public bool IsR
            eusable {get {return false; }
        }
    }
}

1. Demo How to do Text communication through Messagewebsocket and WebSocket server

Communication/socket/messagewebsocketdemo.xaml

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