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example Initial Jun 10, 2012
src Servent (server-client) version Jun 18, 2012
.gitignore Initial Jun 10, 2012 Servent (server-client) version Jun 18, 2012
app.js Register bin Jun 10, 2012
package.json Servent (server-client) version Jun 18, 2012
servent.js Servent (server-client) version Jun 18, 2012

Socket repeater for Node.js

This simple Node.js application serves the purpose of passing messages between connected TCP and WebSocket clients. Any message received from one of them is automatically passed to all others.


  • Install Node.js 0.6.x
  • Check out this repository
  • Install NPM dependencies with npm install


In addition to passing socket data, the application also serves static files located under a given folder. This is useful for serving the actual web application that needs such socket functionality.

When starting the application, you can give it three parameters:

  • The HTTP port to listen to (for example, 80)

  • The TCP port to listen to (for example, 3000)

  • The path under which files ought to be served

    $ ./app.js 80 3000 my/app/folder


There is a simple example provided. To start it, run:

$ ./app.js 80 3000 example

Then connect with a browser to http://localhost.

You also need to telnet to the socket server:

$ telnet localhost 3000

Now anything you write in the telnet session will be shown on the web page instantly.

If you want to send data from the browser, you can run the following in your JavaScript console:

sockjs.send('My cool message');

Servent example

There is another implementation of the repeater as well, called servent (server-client). This one provides the HTTP WebSocket server, but instead of being the TCP server process itself, it connects as a client to another TCP server and repeats messages from there to the WebSocket clients.

$ ./servent.js 80 3000 example