Webbit - A Java event based WebSocket and HTTP server
Getting it
Prebuilt JARs are available from the central Maven repository or the Sonatype Maven repository.
Alternatively, you can get the latest code from Git and build it yourself:
git clone git://github.com/webbit/webbit.git
cd webbit
Make
Build is done with make. On OS-X and Linux this should work out of the box. On Solaris, use gmake. On Windows you will need Cygwin.
make
Maven
mvn install
Quick start
Start a web server on port 8080 and serve some static files:
WebServer webServer = WebServers.createWebServer(8080)
.add(new StaticFileHandler("/web")) // path to web content
.start()
.get();
That was easy.
Now let's build a WebSocketHandler.
public class HelloWebSockets extends BaseWebSocketHandler {
private int connectionCount;
public void onOpen(WebSocketConnection connection) {
connection.send("Hello! There are " + connectionCount + " other connections active");
connectionCount++;
}
public void onClose(WebSocketConnection connection) {
connectionCount--;
}
public void onMessage(WebSocketConnection connection, String message) {
connection.send(message.toUpperCase()); // echo back message in upper case
}
public static void main(String[] args) {
WebServer webServer = WebServers.createWebServer(8080)
.add("/hellowebsocket", new HelloWebSockets())
.add(new StaticFileHandler("/web"));
webServer.start();
System.out.println("Server running at " + webServer.getUri());
}
}
And a page that uses the WebSocket (web/index.html)
<html>
<body>
<!-- Send text to websocket -->
<input id="userInput" type="text">
<button onclick="ws.send(document.getElementById('userInput').value)">Send</button>
<!-- Results -->
<div id="message"></div>
<script>
function showMessage(text) {
document.getElementById('message').innerHTML = text;
}
var ws = new WebSocket('ws://' + document.location.host + '/hellowebsocket');
showMessage('Connecting...');
ws.onopen = function() { showMessage('Connected!'); };
ws.onclose = function() { showMessage('Lost connection'); };
ws.onmessage = function(msg) { showMessage(msg.data); };
</script>
</body>
</html>
Contributing
Running JUnit tests
mvn clean test
or
make clean test
Running Autobahn tests
Autobahn is a WebSocket server implemented in Python that comes with an extensive test suite that can be used to test other WebSocket servers as well.
We're using it to test Webbit.
Installing Autobahn
git submodule update --init
Running Autobahn tests
In shell A:
make echo
In shell B:
make autobahn
Open reports/servers/index.html to see the results.
More
- Docs on wiki
- Webbit mailing list
- @webbitserver on Twitter
- A web based chat room is available in the samples directory. To try it out: 'make chatroom'
- Jay Fields has written a WebSockets with Clojure introduction that uses Webbit
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