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SockJS.NET

An asynchronous .NET implementation of the SockJS client

Components

syp.biz.SockJS.NET.Common

Includes all interfaces, extensions, enums and utils which are common to the client, user of the client and for extending the client.

syp.biz.SockJS.NET.Client

The client library containing the actual SockJS client to be used by consuming applications.

syp.biz.SockJS.NET.Test

A test application which consumes the client library.

server

A node.js SockJS server to be used in conjunction with the test application.

Basic Usage

var sockJs = new SockJS("http://localhost:9999/echo");
sockJs.Connected += async (sender, e) =>
{
    // this event is triggered once the connection is established
    try
    {
        Console.WriteLine("Connected...");
        await sockJs.Send(JsonConvert.SerializeObject(new { foo = "bar" }));
    }
    catch (Exception ex)
    {
        Console.WriteLine($"Error: {e}");
    }
};

sockJs.Message += async (sender, msg) =>
{
    // this event is triggered every time a message is received
    try
    {
        Console.WriteLine($"Message: {msg}");
        await sockJs.Disconnect(); // disconnect after first received message
    }
    catch (Exception ex)
    {
        Console.WriteLine($"Error: {e}");
    }
};

sockJs.Disconnected += (sender, e) =>
{
    // this event is triggered when the connection is disconnected (for any reason)
    Console.WriteLine("Disconnected");
};

await sockJs.Connect(); // connect to the server

Advanced Usage

Customize Configuration

// create a default configuration file (default values)
var config = Configuration.Factory.BuildDefault("http://localhost:9999/echo"); 
var sockJs = new SockJs(config);

Customize Logger

config.Logger = new ConsoleLogger();

Customize Default Request Headers

config.DefaultHeaders = new WebHeaderCollection
{
    {HttpRequestHeader.UserAgent, "Custom User Agent"},
    {"application-key", "foo-bar"}
};

Customize Transports

// add custom transport implementations
config.TransportFactories.Add(new CustomTransportFactory());

// remove custom/built-in transport implementation
config.TransportFactories.Remove(config.TransportFactories.First(t => t.Name == "websocket-system"));

// disable transport
config.TransportFactories.First(t => t.Name == "websocket-system").Enabled = false;

Note

Built-in WebSocket connection (websocket-system) is implemented via System.Net.WebSockets.ClientWebSocket and as such, is not supported on Windows 7, Windows Vista SP2, and Windows Server 2008. See Remarks section.

References

This library is based on the SockJS-client JavaScript library (license).

Dependencies

• Newtonsoft.Json (license)