File:
0.00.1a/js/ajax.js (
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1: /* -------------------------------------------------------------
2: This file is part of FreeDESK
3:
4: FreeDESK is (C) Copyright 2012 David Cutting
5:
6: FreeDESK is free software: you can redistribute it and/or modify
7: it under the terms of the GNU General Public License as published by
8: the Free Software Foundation, either version 3 of the License, or
9: (at your option) any later version.
10:
11: FreeDESK is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: GNU General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with FreeDESK. If not, see www.gnu.org/licenses
18:
19: For more information see www.purplepixie.org/freedesk/
20: -------------------------------------------------------------- */
21:
22: // This is the main AJAX functionality for server requests in FreeDESK
23: // client-side
24:
25: function ServerRequest()
26: {
27: this.callback = ""; // callback function
28: this.url = ""; // URL
29: this.additional = new Array(); // Additional data
30: this.xmlhttp = false; // XML HTTP Request Object
31: this.xmlrequest = true; // Is it an XML Request?
32: this.async = true; // Is it asynchronous (not yet implemented)
33: this.randomise = true; // Set a random string to query to avoid caching
34:
35: this.makeXmlHttp = function()
36: {
37: if (window.XMLHttpRequest) // all good browsers and indeed IE nowadays
38: {
39: this.xmlhttp = new XMLHttpRequest;
40: if (this.xmlrequest && this.xmlhttp.overrideMimeType)
41: this.xmlhttp.overrideMimeType("text/xml");
42: else if (!this.xmlrequest && this.xmlhttp.overrideMimeType)
43: this.xmlhttp.overrideMimeType("text/html");
44: }
45: else if (window.ActiveXObject) // Satan's Browser (old IE or Exploiter 7+ with XMLHttp Disabled)
46: {
47: try
48: {
49: this.xmlhttp = new ActiveXObject("Msxml2.HTTP"); // Newer
50: }
51: catch(e)
52: {
53: try
54: {
55: this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
56: }
57: catch(ex)
58: {
59: // No, Microsoft WHAT HAVE YOU DONE??!?
60: alert("Fatal Error: Cannot create ActiveXObject for xmlhttp");
61: }
62: }
63: }
64: else
65: {
66: // Dear lord are we running in lynx ??!?
67: alert("Fatal Error: Cannot create xmlhttp object");
68: }
69:
70: if (!this.xmlhttp)
71: alert("Error: Cannot Create XMLHTTP Object");
72: }
73:
74: this.randomString = function(len)
75: {
76: if (len == undefined)
77: len = 32;
78: var chars = "abcdefghijklmnopqrstuvwxyz0123456789";
79: var randomstring = "";
80: for (var i=0; i 81: {
82: var randchar = Math.floor(Math.random() * chars.length);
83: randomstring += chars.substring(randchar, randchar+1);
84: }
85: return randomstring;
86: }
87:
88: this.Get = function()
89: {
90: if (!this.xmlhttp)
91: this.makeXmlHttp();
92:
93: var myurl = this.url;
94: if (this.randomise)
95: {
96: if (myurl.indexOf("?") == -1)
97: myurl += "?nocache="+this.randomString();
98: else
99: myurl += "&nocache="+this.randomString();
100: }
101:
102: this.xmlhttp.open('GET', myurl, true);
103: this.xmlhttp.ajax = this;
104: if (this.xmlrequest)
105: {
106: this.xmlhttp.onreadystatechange = function()
107: {
108: if (this.readyState == 4)
109: {
110: if (this.status == 200)
111: {
112: if (this.responseXML)
113: {
114: if (DESK.isError(this.responseXML))
115: {
116: if (DESK.getErrorCode(this.responseXML)==102) // expired session
117: {
118: DESK.show_login(DESK.getError(this.responseXML));
119: return;
120: }
121: } // Hand errors other than 102 through to the callback routine to handle
122: this.ajax.callback(this.responseXML, this.ajax.additional );
123: }
124: else
125: {
126: alert("AJAX XML Error: Invalid or Null\nBody:\n"+this.responseXML);
127: }
128: }
129: else
130: {
131: alert("AJAX Server Code: "+this.status+"\nURL: "+this.ajax.url);
132: }
133: }
134: }
135: }
136: else
137: {
138: // HTML Request
139: this.xmlhttp.onreadystatechange = function()
140: {
141: if (this.readyState == 4)
142: {
143: if (this.status == 200)
144: {
145: if (this.responseText)
146: {
147: this.ajax.callback(this.responseText, this.ajax.additional);
148: }
149: else
150: {
151: alert("AJAX Text Error: Invalid or Null Body\nBody:\n"+this.responseText);
152: }
153: }
154: else
155: {
156: alert("AJAX Server Code: "+this.status+"\nURL: "+this.ajax.url);
157: }
158: }
159: }
160: }
161: this.xmlhttp.send();
162: }
163:
164:
165:
166: this.Post = function(postdata)
167: {
168: if (!this.xmlhttp)
169: this.makeXmlHttp();
170:
171: this.xmlhttp.open('POST', this.url, true);
172: this.xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
173: this.xmlhttp.ajax = this;
174: if (this.xmlrequest)
175: {
176: this.xmlhttp.onreadystatechange = function()
177: {
178: if (this.readyState == 4)
179: {
180: if (this.status == 200)
181: {
182: if (this.responseXML)
183: {
184: if (DESK.isError(this.responseXML))
185: {
186: if (DESK.getErrorCode(this.responseXML)==102) // expired session
187: {
188: DESK.show_login(DESK.getError(this.responseXML));
189: return;
190: }
191: } // Hand errors other than 102 through to the callback routine to handle
192: this.ajax.callback(this.responseXML, this.ajax.additional );
193: }
194: else
195: {
196: alert("AJAX XML Error: Invalid or Null\nBody:\n"+this.responseXML);
197: }
198: }
199: else
200: {
201: alert("AJAX Server Code: "+this.status+"\nURL: "+this.ajax.url);
202: }
203: }
204: }
205: }
206: else
207: {
208: // HTML Request
209: this.xmlhttp.onreadystatechange = function()
210: {
211: if (this.readyState == 4)
212: {
213: if (this.status == 200)
214: {
215: if (this.responseText)
216: {
217: this.ajax.callback(this.responseText, this.ajax.additional);
218: }
219: else
220: {
221: alert("AJAX Text Error: Invalid or Null Body\nBody:\n"+this.responseText);
222: }
223: }
224: else
225: {
226: alert("AJAX Server Code: "+this.status+"\nURL: "+this.ajax.url);
227: }
228: }
229: }
230: }
231: this.xmlhttp.send(postdata);
232: }
233:
234: }
235:
236: