mirror of
https://github.com/moparisthebest/www.moparscape.org
synced 2024-11-16 06:15:13 -05:00
86 lines
2.4 KiB
JavaScript
86 lines
2.4 KiB
JavaScript
|
// jXHR.js (JSON-P XHR)
|
||
|
|
// v0.1 (c) Kyle Simpson
|
||
|
|
// MIT License
|
||
|
|
|
||
|
|
(function(global){
|
||
|
|
var SETTIMEOUT = global.setTimeout, // for better compression
|
||
|
|
doc = global.document,
|
||
|
|
callback_counter = 0;
|
||
|
|
|
||
|
|
global.jXHR = function() {
|
||
|
|
var script_url,
|
||
|
|
script_loaded,
|
||
|
|
jsonp_callback,
|
||
|
|
scriptElem,
|
||
|
|
publicAPI = null;
|
||
|
|
|
||
|
|
function removeScript() { try { scriptElem.parentNode.removeChild(scriptElem); } catch (err) { } }
|
||
|
|
|
||
|
|
function reset() {
|
||
|
|
script_loaded = false;
|
||
|
|
script_url = "";
|
||
|
|
removeScript();
|
||
|
|
scriptElem = null;
|
||
|
|
fireReadyStateChange(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
function ThrowError(msg) {
|
||
|
|
try { publicAPI.onerror.call(publicAPI,msg,script_url); } catch (err) { throw new Error(msg); }
|
||
|
|
}
|
||
|
|
|
||
|
|
function handleScriptLoad() {
|
||
|
|
if ((this.readyState && this.readyState!=="complete" && this.readyState!=="loaded") || script_loaded) { return; }
|
||
|
|
this.onload = this.onreadystatechange = null; // prevent memory leak
|
||
|
|
script_loaded = true;
|
||
|
|
if (publicAPI.readyState !== 4) ThrowError("Script failed to load ["+script_url+"].");
|
||
|
|
removeScript();
|
||
|
|
}
|
||
|
|
|
||
|
|
function fireReadyStateChange(rs,args) {
|
||
|
|
args = args || [];
|
||
|
|
publicAPI.readyState = rs;
|
||
|
|
if (typeof publicAPI.onreadystatechange === "function") publicAPI.onreadystatechange.apply(publicAPI,args);
|
||
|
|
}
|
||
|
|
|
||
|
|
publicAPI = {
|
||
|
|
onerror:null,
|
||
|
|
onreadystatechange:null,
|
||
|
|
readyState:0,
|
||
|
|
open:function(method,url){
|
||
|
|
reset();
|
||
|
|
internal_callback = "cb"+(callback_counter++);
|
||
|
|
(function(icb){
|
||
|
|
global.jXHR[icb] = function() {
|
||
|
|
try { fireReadyStateChange.call(publicAPI,4,arguments); }
|
||
|
|
catch(err) {
|
||
|
|
publicAPI.readyState = -1;
|
||
|
|
ThrowError("Script failed to run ["+script_url+"].");
|
||
|
|
}
|
||
|
|
global.jXHR[icb] = null;
|
||
|
|
};
|
||
|
|
})(internal_callback);
|
||
|
|
script_url = url.replace(/=\?/,"=jXHR."+internal_callback);
|
||
|
|
fireReadyStateChange(1);
|
||
|
|
},
|
||
|
|
send:function(){
|
||
|
|
SETTIMEOUT(function(){
|
||
|
|
scriptElem = doc.createElement("script");
|
||
|
|
scriptElem.setAttribute("type","text/javascript");
|
||
|
|
scriptElem.onload = scriptElem.onreadystatechange = function(){handleScriptLoad.call(scriptElem);};
|
||
|
|
scriptElem.setAttribute("src",script_url);
|
||
|
|
doc.getElementsByTagName("head")[0].appendChild(scriptElem);
|
||
|
|
},0);
|
||
|
|
fireReadyStateChange(2);
|
||
|
|
},
|
||
|
|
setRequestHeader:function(){}, // noop
|
||
|
|
getResponseHeader:function(){return "";}, // basically noop
|
||
|
|
getAllResponseHeaders:function(){return [];} // ditto
|
||
|
|
};
|
||
|
|
|
||
|
|
reset();
|
||
|
|
|
||
|
|
return publicAPI;
|
||
|
|
};
|
||
|
|
})(window);
|
||
|
|
|