User:Shijun/ajax.js

// from http://en.wikipedia.org/skins-1.5/common/ajax.js

var sajax_debug_mode = false; var sajax_request_type = "GET";

/** function sajax_debug(text) { if (!sajax_debug_mode) return false;
 * if sajax_debug_mode is true, this function outputs given the message into
 * the element with id = sajax_debug; if no such element exists in the document,
 * it is injected.

var e= document.getElementById('sajax_debug');

if (!e) { e= document.createElement("p"); e.className= 'sajax_debug'; e.id= 'sajax_debug';

var b= document.getElementsByTagName("body")[0];

if (b.firstChild) b.insertBefore(e, b.firstChild); else b.appendChild(e); }

var m= document.createElement("div"); m.appendChild( document.createTextNode( text ) );

e.appendChild( m );

return true; }

/** function sajax_init_object { sajax_debug("sajax_init_object called..") var A;	try { A=new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { A=new ActiveXObject("Microsoft.XMLHTTP"); } catch (oc) { A=null; }	}	if(!A && typeof XMLHttpRequest != "undefined") A = new XMLHttpRequest; if (!A) sajax_debug("Could not create connection object.");
 * compatibility wrapper for creating a new XMLHttpRequest object.

return A; }

/** function sajax_do_call(func_name, args, target) { var i, x, n;	var uri; var post_data; uri = wgServer + wgScriptPath + "/index.php?action=ajax"; if (sajax_request_type == "GET") { if (uri.indexOf("?") == -1) uri = uri + "?rs=" + encodeURIComponent(func_name); else uri = uri + "&rs=" + encodeURIComponent(func_name); for (i = 0; i < args.length; i++) uri = uri + "&rsargs[]=" + encodeURIComponent(args[i]); //uri = uri + "&rsrnd=" + new Date.getTime; post_data = null; } else { post_data = "rs=" + encodeURIComponent(func_name); for (i = 0; i < args.length; i++) post_data = post_data + "&rsargs[]=" + encodeURIComponent(args[i]); }	x = sajax_init_object; if (!x) { alert("AJAX not supported"); return false; }
 * Perform an ajax call to mediawiki. Calls are handeled by AjaxDispatcher.php
 * func_name - the name of the function to call. Must be registered in $wgAjaxExportList
 * args - an array of arguments to that function
 * target - the target that will handle the result of the call. If this is a function,
 * if will be called with the XMLHttpRequest as a parameter; if it's an input
 * element, its value will be set to the resultText; if it's another type of
 * element, its innerHTML will be set to the resultText.
 * Example:
 * sajax_do_call('doFoo', [1, 2, 3], document.getElementById("showFoo"));
 * This will call the doFoo function via MediaWiki's AjaxDispatcher, with
 * (1, 2, 3) as the parameter list, and will show the result in the element
 * with id = showFoo
 * (1, 2, 3) as the parameter list, and will show the result in the element
 * with id = showFoo

try { x.open(sajax_request_type, uri, true); } catch (e) { if (window.location.hostname == "localhost") { alert("Your browser blocks XMLHttpRequest to 'localhost', try using a real hostname for development/testing."); }		throw e;	} if (sajax_request_type == "POST") { x.setRequestHeader("Method", "POST " + uri + " HTTP/1.1"); x.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); }	x.setRequestHeader("Pragma", "cache=yes"); x.setRequestHeader("Cache-Control", "no-transform"); x.onreadystatechange = function { if (x.readyState != 4) return;

sajax_debug("received (" + x.status + " " + x.statusText + ") " + x.responseText);

//if (x.status != 200) //	alert("Error: " + x.status + " " + x.statusText + ": " + x.responseText); //else

if ( typeof( target ) == 'function' ) { target( x ); }		else if ( typeof( target ) == 'object' ) { if ( target.tagName == 'INPUT' ) { if (x.status == 200) target.value= x.responseText; //else alert("Error: " + x.status + " " + x.statusText + " (" + x.responseText + ")"); }			else { if (x.status == 200) target.innerHTML = x.responseText; else target.innerHTML= " Error: " + x.status + " " + x.statusText + " (" + x.responseText + ") "; }		}		else { alert("bad target for sajax_do_call: not a function or object: " + target); }

return; }

sajax_debug(func_name + " uri = " + uri + " / post = " + post_data); x.send(post_data); sajax_debug(func_name + " waiting.."); delete x;

return true; }