https://edufuture.biz/skins/common/ajax.js?270

1// remote scripting library
2// (c) copyright 2005 modernmethod, inc
3var sajax_debug_mode = false;
4var sajax_request_type = "GET";
5
6/**
7* if sajax_debug_mode is true, this function outputs given the message into 
8* the element with id = sajax_debug; if no such element exists in the document, 
9* it is injected.
10*/
11function sajax_debug(text) {
12	if (!sajax_debug_mode) return false;
13
14	var e= document.getElementById('sajax_debug');
15
16	if (!e) {
17		e= document.createElement("p");
18		e.className= 'sajax_debug';
19		e.id= 'sajax_debug';
20
21		var b= document.getElementsByTagName("body")[0];
22
23		if (b.firstChild) b.insertBefore(e, b.firstChild);
24		else b.appendChild(e);
25	}
26
27	var m= document.createElement("div");
28	m.appendChild( document.createTextNode( text ) );
29
30	e.appendChild( m );
31
32	return true;
33}
34
35/**
36* compatibility wrapper for creating a new XMLHttpRequest object.
37*/
38function sajax_init_object() {
39	sajax_debug("sajax_init_object() called..")
40	var A;
41	try {
42		// Try the new style before ActiveX so we don't
43		// unnecessarily trigger warnings in IE 7 when
44		// set to prompt about ActiveX usage
45		A = new XMLHttpRequest();
46	} catch (e) {
47		try {
48			A=new ActiveXObject("Msxml2.XMLHTTP");
49		} catch (e) {
50			try {
51				A=new ActiveXObject("Microsoft.XMLHTTP");
52			} catch (oc) {
53				A=null;
54			}
55		}
56	}
57	if (!A)
58		sajax_debug("Could not create connection object.");
59
60	return A;
61}
62
63/**
64* Perform an ajax call to mediawiki. Calls are handeled by AjaxDispatcher.php
65*   func_name - the name of the function to call. Must be registered in $wgAjaxExportList
66*   args - an array of arguments to that function
67*   target - the target that will handle the result of the call. If this is a function,
68*            if will be called with the XMLHttpRequest as a parameter; if it's an input
69*            element, its value will be set to the resultText; if it's another type of
70*            element, its innerHTML will be set to the resultText.
71*
72* Example:
73*    sajax_do_call('doFoo', [1, 2, 3], document.getElementById("showFoo"));
74*
75* This will call the doFoo function via MediaWiki's AjaxDispatcher, with
76* (1, 2, 3) as the parameter list, and will show the result in the element
77* with id = showFoo
78*/
79function sajax_do_call(func_name, args, target) {
80	var i, x, n;
81	var uri;
82	var post_data;
83	uri = wgServer +
84		((wgScript == null) ? (wgScriptPath + "/index.php") : wgScript) +
85		"?action=ajax";
86	if (sajax_request_type == "GET") {
87		if (uri.indexOf("?") == -1)
88			uri = uri + "?rs=" + encodeURIComponent(func_name);
89		else
90			uri = uri + "&rs=" + encodeURIComponent(func_name);
91		for (i = 0; i < args.length; i++)
92			uri = uri + "&rsargs[]=" + encodeURIComponent(args[i]);
93		//uri = uri + "&rsrnd=" + new Date().getTime();
94		post_data = null;
95	} else {
96		post_data = "rs=" + encodeURIComponent(func_name);
97		for (i = 0; i < args.length; i++)
98			post_data = post_data + "&rsargs[]=" + encodeURIComponent(args[i]);
99	}
100	x = sajax_init_object();
101	if (!x) {
102		alert("AJAX not supported");
103		return false;
104	}
105
106	try {
107		x.open(sajax_request_type, uri, true);
108	} catch (e) {
109		if (window.location.hostname == "localhost") {
110			alert("Your browser blocks XMLHttpRequest to 'localhost', try using a real hostname for development/testing.");
111		}
112		throw e;
113	}
114	if (sajax_request_type == "POST") {
115		x.setRequestHeader("Method", "POST " + uri + " HTTP/1.1");
116		x.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
117	}
118	x.setRequestHeader("Pragma", "cache=yes");
119	x.setRequestHeader("Cache-Control", "no-transform");
120	x.onreadystatechange = function() {
121		if (x.readyState != 4)
122			return;
123
124		sajax_debug("received (" + x.status + " " + x.statusText + ") " + x.responseText);
125
126		//if (x.status != 200)
127		//	alert("Error: " + x.status + " " + x.statusText + ": " + x.responseText);
128		//else
129
130		if ( typeof( target ) == 'function' ) {
131			target( x );
132		}
133		else if ( typeof( target ) == 'object' ) {
134			if ( target.tagName == 'INPUT' ) {
135				if (x.status == 200) target.value= x.responseText;
136				//else alert("Error: " + x.status + " " + x.statusText + " (" + x.responseText + ")");
137			}
138			else {
139				if (x.status == 200) target.innerHTML = x.responseText;
140				else target.innerHTML= "<div class='error'>Error: " + x.status + " " + x.statusText + " (" + x.responseText + ")</div>";
141			}
142		}
143		else {
144			alert("bad target for sajax_do_call: not a function or object: " + target);
145		}
146
147		return;
148	}
149
150	sajax_debug(func_name + " uri = " + uri + " / post = " + post_data);
151	x.send(post_data);
152	sajax_debug(func_name + " waiting..");
153	delete x;
154
155	return true;
156}
157
158/**
159 * @return boolean whether the browser supports XMLHttpRequest
160 */
161function wfSupportsAjax() {
162	var request = sajax_init_object();
163	var supportsAjax = request ? true : false;

164	delete request;
165	return supportsAjax;
166}
167