148 lines
2.6 KiB
JavaScript
Executable File
148 lines
2.6 KiB
JavaScript
Executable File
/**
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* Ajax
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*
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* Module for making ajax requests
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*/
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(function (){
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"use strict";
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// Don't bother even defining the object if the XMLHttpRequest isn't available
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if(typeof window.XMLHttpRequest === "undefined")
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{
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return;
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}
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var ajax = {
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_do: function (url, data, callback, isPost)
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{
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var type,
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request = new XMLHttpRequest();
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if (typeof callback === "undefined")
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{
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/**
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* @private
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*/
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callback = function (){};
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}
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type = (isPost) ? "POST" : "GET";
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url += (type === "GET") ? "?"+this._serialize(data) : '';
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request.open(type, url);
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request.onreadystatechange = function ()
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{
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if (request.readyState === 4)
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{
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callback(request.responseText);
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}
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};
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if (type === "POST")
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{
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request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
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request.send(this._serialize(data));
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}
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else
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{
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request.send(null);
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}
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},
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_serialize: function (data)
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{
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var name,
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value,
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pairs = [];
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for (name in data)
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{
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if (!data.hasOwnProperty(name))
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{
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continue;
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}
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if (typeof data[name] === "function")
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{
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continue;
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}
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value = data[name].toString();
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name = encodeURIComponent(name);
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value = encodeURIComponent(value);
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pairs.push(name + "=" + value);
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}
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return pairs.join("&");
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}
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};
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/**
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* Sends a GET type ajax request
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*
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* @name get
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* @function
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* @memberOf $_
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* @param string url
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* @param object data
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* @param function callback
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*/
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$_.ext('get', function (url, data, callback){
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ajax._do(url, data, callback, false);
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});
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/**
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* Sends a POST type ajax request
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*
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* @name post
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* @function
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* @memberOf $_
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* @param string url
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* @param object data
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* @param function callback
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*/
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$_.ext('post', function (url, data, callback){
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ajax._do(url, data, callback, true);
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});
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/**
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* Watches for server-sent events, or falls back to ajax polling
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* - defaults to 30 second intervals
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*
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* @name sse
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* @function
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* @memberOf $_
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* @param string url
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* @param function callback
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* @param [int] 30000
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*/
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$_.ext('sse', function(url, callback, poll_rate){
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var source;
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//Check for server-sent event support
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if (typeof EventSource !== 'undefined')
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{
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source = new EventSource(url);
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// Apply the callback
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source.onmessage = function(event){
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callback(event.data);
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};
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}
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else // Ajax polling fallback
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{
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poll_rate = poll_rate || 30000;
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setInterval($_.get, poll_rate, url, {}, function(res){
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res.replace(/data:/gim, '');
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res.replace(/^event|id|retry?:(.*)$/gim, '');
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callback(res);
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});
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}
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});
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}()); |