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atmosphere.js with Node.js
$(function () {
"use strict";
var header = $('#header');
var content = $('#content');
var input = $('#input');
var status = $('#status');
var myName = false;
var author = null;
var logged = false;
var socket = $.atmosphere;
var subSocket;
var transport = 'websocket';
// We are now ready to cut the request
var request = { url: document.location.protocol + "//" + document.location.host + '/chat',
contentType: "application/json",
logLevel: 'debug',
transport: transport,
enableProtocol: false,
fallbackTransport: 'long-polling'};
request.onOpen = function (response) {
content.html($('<p>', { text: 'Atmosphere connected using ' + response.transport }));
input.removeAttr('disabled').focus();
status.text('Choose name:');
transport = response.transport;
};
<!-- For demonstration of how you can customize the fallbackTransport using the onTransportFailure function -->
request.onTransportFailure = function (errorMsg, request) {
jQuery.atmosphere.info(errorMsg);
if (window.EventSource) {
request.fallbackTransport = "sse";
}
header.html($('<h3>', { text: 'Atmosphere Chat. Default transport is WebSocket, fallback is ' + request.fallbackTransport }));
};
request.onMessage = function (response) {
var message = response.responseBody;
try {
var json = jQuery.parseJSON(message);
} catch (e) {
console.log('This doesn\'t look like a valid JSON: ', message.data);
return;
}
if (!logged && myName) {
logged = true;
status.text(myName + ': ').css('color', 'blue');
input.removeAttr('disabled').focus();
} else {
input.removeAttr('disabled');
var me = json.author == author;
var date = typeof(json.time) == 'string' ? parseInt(json.time) : json.time;
addMessage(json.author, json.message, me ? 'blue' : 'black', new Date(date));
}
};
request.onClose = function (response) {
logged = false;
};
request.onError = function (response) {
content.html($('<p>', { text: 'Sorry, but there\'s some problem with your '
+ 'socket or the server is down' }));
};
subSocket = socket.subscribe(request);
input.keydown(function (e) {
if (e.keyCode === 13) {
var msg = $(this).val();
// First message is always the author's name
if (author == null) {
author = msg;
}
subSocket.push(jQuery.stringifyJSON({ author: author, message: msg }));
$(this).val('');
input.attr('disabled', 'disabled');
if (myName === false) {
myName = msg;
}
}
});
function addMessage(author, message, color, datetime) {
content.append('<p><span style="color:' + color + '">' + author + '</span> @ ' + +(datetime.getHours() < 10 ? '0' + datetime.getHours() : datetime.getHours()) + ':'
+ (datetime.getMinutes() < 10 ? '0' + datetime.getMinutes() : datetime.getMinutes())
+ ': ' + message + '</p>');
}
});
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