Titanium.Network.Socket.TCP

The following example uses the pump method from the <Titanium.Stream> module to read data from a socket. The pump method registers a callback that is called repeatedly to process incoming data from the socket.

var socket = Ti.Network.Socket.createTCP({
    host: 'blog.example.com', port: 80,
    connected: function (e) {
        Ti.API.info('Socket opened!');
        Ti.Stream.pump(e.socket, readCallback, 1024, true);
        Ti.Stream.write(socket, Ti.createBuffer({
            value: 'GET http://blog.example.com/index.html HTTP/1.1\r\n\r\n'
        }), writeCallback);
    },
        error: function (e) {
        Ti.API.info('Error (' + e.errorCode + '): ' + e.error);
    },
});
socket.connect();

function writeCallback(e) {
    Ti.API.info('Successfully wrote to socket.');
}

function readCallback(e) {
    if (e.bytesProcessed == -1)
    {
        // Error / EOF on socket. Do any cleanup here.
        ...
    }
    try {
        if(e.buffer) {
            var received = e.buffer.toString();
            Ti.API.info('Received: ' + received);
        } else {
            Ti.API.error('Error: read callback called with no buffer!');
        }
    } catch (ex) {
        Ti.API.error(ex);
    }
}

The following sample shows a trivial example of using a listening socket. In this case, the application simply sends messages to itself, using the loopback address.

// Hostname to listen on/connect to. Here we use the loopback
// address. iOS also supports Ti.Platform.address (the address of
// the WiFi interface).
// Android supports only the loopback address.

var hostname = '127.0.0.1';

var clientSocket = Ti.Network.Socket.createTCP({
    host : hostname,
    port : 40404,
    connected : function(e) {
        Ti.API.info('Client socket connected!');
        Ti.Stream.pump(e.socket, pumpCallback, 1024, true);
        e.socket.write(Ti.createBuffer({
            value : 'A message from a connecting socket.'
        }));
    },
    error : function(e) {
        Ti.API.info('Error (' + e.errorCode + '): ' + e.error);
    }
});

function writeCallback(e) {
    Ti.API.info('Successfully wrote to socket.');
}

function pumpCallback(e) {
    // Has the remote socket closed its end?
    if (e.bytesProcessed < 0) {
        Ti.API.info("Closing client socket.");
        clientSocket.close();
        return;
    }
    try {
        if(e.buffer) {
            var received = e.buffer.toString();
            Ti.API.info('Received: ' + received);
        } else {
            Ti.API.error('Error: read callback called with no buffer!');
        }
    } catch (ex) {
        Ti.API.error(ex);
    }
}

// Create a socket and listen for incoming connections
var listenSocket = Ti.Network.Socket.createTCP({
    host : hostname,
    port : 40404,
    accepted : function(e) {
        // This where you would usually store the newly-connected socket, e.inbound
        // so it can be used for read / write operations elsewhere in the app.
        // In this case, we simply send a message then close the socket.
        Ti.API.info("Listening socket <" + e.socket + "> accepted incoming connection <" + e.inbound + ">");
        e.inbound.write(Ti.createBuffer({
            value : 'You have been connected to a listening socket.\r\n'
        }));
        e.inbound.close();
        // close the accepted socket

    },
    error : function(e) {
        Ti.API.error("Socket <" + e.socket + "> encountered error when listening");
        Ti.API.error(" error code <" + e.errorCode + ">");
        Ti.API.error(" error description <" + e.error + ">");
    }
});
// Starts the socket listening for connections, does not accept them
listenSocket.listen();
Ti.API.info("Listening now...");

// Tells socket to accept the next inbound connection. listenSocket.accepted gets
// called when a connection is accepted via accept()
Ti.API.info("Calling accept.");
listenSocket.accept({
    timeout : 10000
});

// Call connect after a short timeout to ensure the listening socket is ready to go.
Ti.API.info("Setting timer to connect.");
setTimeout(function(e)
{
    Ti.API.info("Calling connect on client socket.");
    clientSocket.connect();
}, 500);