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comparison mod_json_streams/strophe.jsonstreams.js @ 351:85d3c04c64f6

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mod_json_streams/strophe.jsonstreams.js: A strophe.js plugin to make it work.
author Waqas Hussain <waqas20@gmail.com>
date Sat, 02 Apr 2011 03:11:22 +0500
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children 0b4fe47e648d
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350:98569ec25ac2 351:85d3c04c64f6
1
2 /* jsonstreams plugin
3 **
4 ** This plugin upgrades Strophe to support XEP-0295: JSON Encodings for XMPP
5 **
6 */
7
8 Strophe.addConnectionPlugin('jsonstreams', {
9 init: function (conn) {
10
11 var parseXMLString = function(xmlStr) {
12 var xmlDoc = null;
13 if (window.ActiveXObject) {
14 xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
15 xmlDoc.async=false;
16 xmlDoc.loadXML(xmlStr);
17 } else {
18 var parser = new DOMParser();
19 xmlDoc = parser.parseFromString(xmlStr, "text/xml");
20 }
21 return xmlDoc;
22 }
23
24 // replace Strophe.Request._newXHR with new jsonstreams version
25 // if JSON is detected
26 if (window.JSON) {
27 var _newXHR = Strophe.Request.prototype._newXHR;
28 Strophe.Request.prototype._newXHR = function () {
29 var _xhr = _newXHR.apply(this, arguments);
30 var xhr = {
31 readyState: 0,
32 responseText: null,
33 responseXML: null,
34 status: null,
35 open: function(a, b, c) { return _xhr.open(a, b, c) },
36 abort: function() { _xhr.abort(); },
37 send: function(data) {
38 data = JSON.stringify({"s":data});
39 return _xhr.send(data);
40 }
41 };
42 xhr.onreadystatechange = _xhr.onreadystatechange;
43 _xhr.onreadystatechange = function() {
44 xhr.readyState = _xhr.readyState;
45 if (xhr.readyState != 4) {
46 xhr.status = 0;
47 xhr.responseText = "";
48 xhr.responseXML = null;
49 } else {
50 xhr.status = _xhr.status;
51 xhr.responseText = _xhr.responseText;
52 xhr.responseXML = _xhr.responseXML;
53 if (_xhr.responseText && !_xhr.responseXML) {
54 var data = JSON.parse(_xhr.responseText);
55 if (data && data.s) {
56 xhr.responseText = data.s;
57 xhr.responseXML = parseXMLString(data.s);
58 }
59 }
60 }
61 if (xhr.onreadystatechange) { xhr.onreadystatechange(); }
62 }
63 return xhr;
64 };
65 } else {
66 Strophe.error("jsonstreams plugin loaded, but JSON not found." +
67 " Falling back to native XHR implementation.");
68 }
69 }
70 });