CODEWITHSUNDEEP
c#javascriptasp.netwebsocket
Marwan
Marwan

Reputation: 2402

websocket connection fails?

I'm new in web sockets and trying to create one using asp.net Generic Handler and JavaScript WebSocket Class

JavaScript 

<script type="text/javascript">
    window.onload= function () {

        var name = prompt('what is your name?:');            
        var url = 'ws://localhost:5707/ws.ashx?name=' + name;    
        var ws = new WebSocket(url);    
        ws.onopen = function () {
            alert('Connection Opened');
        };
            ws.onmessage = function (e) {
        };
            ws.onclose = function () {
            alert('Connection Close');
        };
            ws.onerror = function (e) {
            alert('Error')
        };

        }

</script>

C# Generic Handler Called ws.ashx

public class ws : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        if (context.IsWebSocketRequest)
            context.AcceptWebSocketRequest(new TestWebSocketHandler());
    }
    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

Class TestWebSocketHandler which is inherits from WebSocketHandler 

   public class TestWebSocketHandler : WebSocketHandler
    {
        private static WebSocketCollection clients = new WebSocketCollection();
        private string name;

        public override void OnOpen()
        {
            this.name = this.WebSocketContext.QueryString["name"];
            clients.Add(this);
            clients.Broadcast(name + " has connected.");
        }

        public override void OnMessage(string message)
        {
            clients.Broadcast(string.Format("{0} said: {1}", name, message));
        }

        public override void OnClose()
        {
            clients.Remove(this);
            clients.Broadcast(string.Format("{0} has gone away.", name));
        }

    }

My Problem is

when the websocket intend to open i noticed that when went to the handler the 

context.IsWebSocketRequest // returns false

and then it fires Error on the client says

Firefox can't establish a connection to the server at ws://localhost:5707/ws.ashx?name=j

and then close the connection instantiation

i need to know where is the problem ? kindly

i'm using vs 2013 under windows 7 and i think its IIS 6 which i work on

Upvotes: 5

Views: 6517

Answers (2)

Manoj
Manoj

Reputation: 59

Reason could be any of these:

  1. Having IIS version < 8
  2. Not enabled Web Socket Protocol under windows features
  3. Having .NET Framework version < 4.5
  4. Not included the following lines in web.config's system.webServer section:
<handlers>
    <add path="/ws.ashx" verb="*" name="ws" type="namespace.ws"/>
</handlers>

Upvotes: 2

vtortola
vtortola

Reputation: 35905

WebSockets will only work on ASP.NET applications running on Windows 8 or Windows 2012 I am afraid. Despite of the API been included on .NET 4.5.1, it won't work if you are not using those operating system. Actually, if you try to use the ClientWebSocket it will throw a PlatformNotSupportedException.

If you cannot get any of those operating systems, you can check alternatives:

Upvotes: 5

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