1 | /**! |
---|
2 | * project-site: http://plugins.jquery.com/project/AjaxManager |
---|
3 | * repository: http://github.com/aFarkas/Ajaxmanager |
---|
4 | * @author Alexander Farkas |
---|
5 | * @version 3.12 |
---|
6 | * Copyright 2010, Alexander Farkas |
---|
7 | * Dual licensed under the MIT or GPL Version 2 licenses. |
---|
8 | */ |
---|
9 | |
---|
10 | (function($){ |
---|
11 | "use strict"; |
---|
12 | var managed = {}, |
---|
13 | cache = {} |
---|
14 | ; |
---|
15 | $.manageAjax = (function(){ |
---|
16 | function create(name, opts){ |
---|
17 | managed[name] = new $.manageAjax._manager(name, opts); |
---|
18 | return managed[name]; |
---|
19 | } |
---|
20 | |
---|
21 | function destroy(name){ |
---|
22 | if(managed[name]){ |
---|
23 | managed[name].clear(true); |
---|
24 | delete managed[name]; |
---|
25 | } |
---|
26 | } |
---|
27 | |
---|
28 | |
---|
29 | var publicFns = { |
---|
30 | create: create, |
---|
31 | destroy: destroy |
---|
32 | }; |
---|
33 | |
---|
34 | return publicFns; |
---|
35 | })(); |
---|
36 | |
---|
37 | $.manageAjax._manager = function(name, opts){ |
---|
38 | this.requests = {}; |
---|
39 | this.inProgress = 0; |
---|
40 | this.name = name; |
---|
41 | this.qName = name; |
---|
42 | |
---|
43 | this.opts = $.extend({}, $.manageAjax.defaults, opts); |
---|
44 | if(opts && opts.queue && opts.queue !== true && typeof opts.queue === 'string' && opts.queue !== 'clear'){ |
---|
45 | this.qName = opts.queue; |
---|
46 | } |
---|
47 | }; |
---|
48 | |
---|
49 | $.manageAjax._manager.prototype = { |
---|
50 | add: function(url, o){ |
---|
51 | if(typeof url == 'object'){ |
---|
52 | o = url; |
---|
53 | } else if(typeof url == 'string'){ |
---|
54 | o = $.extend(o || {}, {url: url}); |
---|
55 | } |
---|
56 | o = $.extend({}, this.opts, o); |
---|
57 | |
---|
58 | var origCom = o.complete || $.noop, |
---|
59 | origSuc = o.success || $.noop, |
---|
60 | beforeSend = o.beforeSend || $.noop, |
---|
61 | origError = o.error || $.noop, |
---|
62 | strData = (typeof o.data == 'string') ? o.data : $.param(o.data || {}), |
---|
63 | xhrID = o.type + o.url + strData, |
---|
64 | that = this, |
---|
65 | ajaxFn = this._createAjax(xhrID, o, origSuc, origCom) |
---|
66 | ; |
---|
67 | if(o.preventDoubleRequests && o.queueDuplicateRequests){ |
---|
68 | if(o.preventDoubleRequests){ |
---|
69 | o.queueDuplicateRequests = false; |
---|
70 | } |
---|
71 | setTimeout(function(){ |
---|
72 | throw("preventDoubleRequests and queueDuplicateRequests can't be both true"); |
---|
73 | }, 0); |
---|
74 | } |
---|
75 | if(this.requests[xhrID] && o.preventDoubleRequests){ |
---|
76 | return; |
---|
77 | } |
---|
78 | ajaxFn.xhrID = xhrID; |
---|
79 | o.xhrID = xhrID; |
---|
80 | |
---|
81 | o.beforeSend = function(xhr, opts){ |
---|
82 | var ret = beforeSend.call(this, xhr, opts); |
---|
83 | if(ret === false){ |
---|
84 | that._removeXHR(xhrID); |
---|
85 | } |
---|
86 | xhr = null; |
---|
87 | return ret; |
---|
88 | }; |
---|
89 | o.complete = function(xhr, status){ |
---|
90 | that._complete.call(that, this, origCom, xhr, status, xhrID, o); |
---|
91 | xhr = null; |
---|
92 | }; |
---|
93 | |
---|
94 | o.success = function(data, status, xhr){ |
---|
95 | that._success.call(that, this, origSuc, data, status, xhr, o); |
---|
96 | xhr = null; |
---|
97 | }; |
---|
98 | |
---|
99 | //always add some error callback |
---|
100 | o.error = function(ahr, status, errorStr){ |
---|
101 | var httpStatus = '', |
---|
102 | content = '' |
---|
103 | ; |
---|
104 | if(status !== 'timeout' && ahr){ |
---|
105 | httpStatus = ahr.status; |
---|
106 | content = ahr.responseXML || ahr.responseText; |
---|
107 | } |
---|
108 | if(origError) { |
---|
109 | origError.call(this, ahr, status, errorStr, o); |
---|
110 | } else { |
---|
111 | setTimeout(function(){ |
---|
112 | throw status + '| status: ' + httpStatus + ' | URL: ' + o.url + ' | data: '+ strData + ' | thrown: '+ errorStr + ' | response: '+ content; |
---|
113 | }, 0); |
---|
114 | } |
---|
115 | ahr = null; |
---|
116 | }; |
---|
117 | |
---|
118 | if(o.queue === 'clear'){ |
---|
119 | $(document).clearQueue(this.qName); |
---|
120 | } |
---|
121 | |
---|
122 | if(o.queue || (o.queueDuplicateRequests && this.requests[xhrID])){ |
---|
123 | $.queue(document, this.qName, ajaxFn); |
---|
124 | if(this.inProgress < o.maxRequests && (!this.requests[xhrID] || !o.queueDuplicateRequests)){ |
---|
125 | $.dequeue(document, this.qName); |
---|
126 | } |
---|
127 | return xhrID; |
---|
128 | } |
---|
129 | return ajaxFn(); |
---|
130 | }, |
---|
131 | _createAjax: function(id, o, origSuc, origCom){ |
---|
132 | var that = this; |
---|
133 | return function(){ |
---|
134 | if(o.beforeCreate.call(o.context || that, id, o) === false){return;} |
---|
135 | that.inProgress++; |
---|
136 | if(that.inProgress === 1){ |
---|
137 | $.event.trigger(that.name +'AjaxStart'); |
---|
138 | } |
---|
139 | if(o.cacheResponse && cache[id]){ |
---|
140 | if(!cache[id].cacheTTL || cache[id].cacheTTL < 0 || ((new Date().getTime() - cache[id].timestamp) < cache[id].cacheTTL)){ |
---|
141 | that.requests[id] = {}; |
---|
142 | setTimeout(function(){ |
---|
143 | that._success.call(that, o.context || o, origSuc, cache[id]._successData, 'success', cache[id], o); |
---|
144 | that._complete.call(that, o.context || o, origCom, cache[id], 'success', id, o); |
---|
145 | }, 0); |
---|
146 | } else { |
---|
147 | delete cache[id]; |
---|
148 | } |
---|
149 | } |
---|
150 | if(!o.cacheResponse || !cache[id]) { |
---|
151 | if (o.async) { |
---|
152 | that.requests[id] = $.ajax(o); |
---|
153 | } else { |
---|
154 | $.ajax(o); |
---|
155 | } |
---|
156 | } |
---|
157 | return id; |
---|
158 | }; |
---|
159 | }, |
---|
160 | _removeXHR: function(xhrID){ |
---|
161 | if(this.opts.queue || this.opts.queueDuplicateRequests){ |
---|
162 | $.dequeue(document, this.qName); |
---|
163 | } |
---|
164 | this.inProgress--; |
---|
165 | this.requests[xhrID] = null; |
---|
166 | delete this.requests[xhrID]; |
---|
167 | }, |
---|
168 | clearCache: function () { |
---|
169 | cache = {}; |
---|
170 | }, |
---|
171 | _isAbort: function(xhr, status, o){ |
---|
172 | if(!o.abortIsNoSuccess || (!xhr && !status)){ |
---|
173 | return false; |
---|
174 | } |
---|
175 | var ret = !!( ( !xhr || xhr.readyState === 0 || this.lastAbort === o.xhrID ) ); |
---|
176 | xhr = null; |
---|
177 | return ret; |
---|
178 | }, |
---|
179 | _complete: function(context, origFn, xhr, status, xhrID, o){ |
---|
180 | if(this._isAbort(xhr, status, o)){ |
---|
181 | status = 'abort'; |
---|
182 | o.abort.call(context, xhr, status, o); |
---|
183 | } |
---|
184 | origFn.call(context, xhr, status, o); |
---|
185 | |
---|
186 | $.event.trigger(this.name +'AjaxComplete', [xhr, status, o]); |
---|
187 | |
---|
188 | if(o.domCompleteTrigger){ |
---|
189 | $(o.domCompleteTrigger) |
---|
190 | .trigger(this.name +'DOMComplete', [xhr, status, o]) |
---|
191 | .trigger('DOMComplete', [xhr, status, o]) |
---|
192 | ; |
---|
193 | } |
---|
194 | |
---|
195 | this._removeXHR(xhrID); |
---|
196 | if(!this.inProgress){ |
---|
197 | $.event.trigger(this.name +'AjaxStop'); |
---|
198 | } |
---|
199 | xhr = null; |
---|
200 | }, |
---|
201 | _success: function(context, origFn, data, status, xhr, o){ |
---|
202 | var that = this; |
---|
203 | if(this._isAbort(xhr, status, o)){ |
---|
204 | xhr = null; |
---|
205 | return; |
---|
206 | } |
---|
207 | if(o.abortOld){ |
---|
208 | $.each(this.requests, function(name){ |
---|
209 | if(name === o.xhrID){ |
---|
210 | return false; |
---|
211 | } |
---|
212 | that.abort(name); |
---|
213 | }); |
---|
214 | } |
---|
215 | if(o.cacheResponse && !cache[o.xhrID]){ |
---|
216 | if(!xhr){ |
---|
217 | xhr = {}; |
---|
218 | } |
---|
219 | cache[o.xhrID] = { |
---|
220 | status: xhr.status, |
---|
221 | statusText: xhr.statusText, |
---|
222 | responseText: xhr.responseText, |
---|
223 | responseXML: xhr.responseXML, |
---|
224 | _successData: data, |
---|
225 | cacheTTL: o.cacheTTL, |
---|
226 | timestamp: new Date().getTime() |
---|
227 | }; |
---|
228 | if('getAllResponseHeaders' in xhr){ |
---|
229 | var responseHeaders = xhr.getAllResponseHeaders(); |
---|
230 | var parsedHeaders; |
---|
231 | var parseHeaders = function(){ |
---|
232 | if(parsedHeaders){return;} |
---|
233 | parsedHeaders = {}; |
---|
234 | $.each(responseHeaders.split("\n"), function(i, headerLine){ |
---|
235 | var delimiter = headerLine.indexOf(":"); |
---|
236 | parsedHeaders[headerLine.substr(0, delimiter)] = headerLine.substr(delimiter + 2); |
---|
237 | }); |
---|
238 | }; |
---|
239 | $.extend(cache[o.xhrID], { |
---|
240 | getAllResponseHeaders: function() {return responseHeaders;}, |
---|
241 | getResponseHeader: function(name) { |
---|
242 | parseHeaders(); |
---|
243 | return (name in parsedHeaders) ? parsedHeaders[name] : null; |
---|
244 | } |
---|
245 | }); |
---|
246 | } |
---|
247 | } |
---|
248 | origFn.call(context, data, status, xhr, o); |
---|
249 | $.event.trigger(this.name +'AjaxSuccess', [xhr, o, data]); |
---|
250 | if(o.domSuccessTrigger){ |
---|
251 | $(o.domSuccessTrigger) |
---|
252 | .trigger(this.name +'DOMSuccess', [data, o]) |
---|
253 | .trigger('DOMSuccess', [data, o]) |
---|
254 | ; |
---|
255 | } |
---|
256 | xhr = null; |
---|
257 | }, |
---|
258 | getData: function(id){ |
---|
259 | if( id ){ |
---|
260 | var ret = this.requests[id]; |
---|
261 | if(!ret && this.opts.queue) { |
---|
262 | ret = $.grep($(document).queue(this.qName), function(fn, i){ |
---|
263 | return (fn.xhrID === id); |
---|
264 | })[0]; |
---|
265 | } |
---|
266 | return ret; |
---|
267 | } |
---|
268 | return { |
---|
269 | requests: this.requests, |
---|
270 | queue: (this.opts.queue) ? $(document).queue(this.qName) : [], |
---|
271 | inProgress: this.inProgress |
---|
272 | }; |
---|
273 | }, |
---|
274 | abort: function(id){ |
---|
275 | var xhr; |
---|
276 | if(id){ |
---|
277 | xhr = this.getData(id); |
---|
278 | |
---|
279 | if(xhr && xhr.abort){ |
---|
280 | this.lastAbort = id; |
---|
281 | xhr.abort(); |
---|
282 | this.lastAbort = false; |
---|
283 | } else { |
---|
284 | $(document).queue( |
---|
285 | this.qName, $.grep($(document).queue(this.qName), function(fn, i){ |
---|
286 | return (fn !== xhr); |
---|
287 | }) |
---|
288 | ); |
---|
289 | } |
---|
290 | xhr = null; |
---|
291 | return; |
---|
292 | } |
---|
293 | |
---|
294 | var that = this, |
---|
295 | ids = [] |
---|
296 | ; |
---|
297 | $.each(this.requests, function(id){ |
---|
298 | ids.push(id); |
---|
299 | }); |
---|
300 | $.each(ids, function(i, id){ |
---|
301 | that.abort(id); |
---|
302 | }); |
---|
303 | }, |
---|
304 | clear: function(shouldAbort){ |
---|
305 | $(document).clearQueue(this.qName); |
---|
306 | if(shouldAbort){ |
---|
307 | this.abort(); |
---|
308 | } |
---|
309 | } |
---|
310 | }; |
---|
311 | $.manageAjax._manager.prototype.getXHR = $.manageAjax._manager.prototype.getData; |
---|
312 | $.manageAjax.defaults = { |
---|
313 | beforeCreate: $.noop, |
---|
314 | abort: $.noop, |
---|
315 | abortIsNoSuccess: true, |
---|
316 | maxRequests: 1, |
---|
317 | cacheResponse: false, |
---|
318 | async: true, |
---|
319 | domCompleteTrigger: false, |
---|
320 | domSuccessTrigger: false, |
---|
321 | preventDoubleRequests: true, |
---|
322 | queueDuplicateRequests: false, |
---|
323 | cacheTTL: -1, |
---|
324 | queue: false // true, false, clear |
---|
325 | }; |
---|
326 | |
---|
327 | $.each($.manageAjax._manager.prototype, function(n, fn){ |
---|
328 | if(n.indexOf('_') === 0 || !$.isFunction(fn)){return;} |
---|
329 | $.manageAjax[n] = function(name, o){ |
---|
330 | if(!managed[name]){ |
---|
331 | if(n === 'add'){ |
---|
332 | $.manageAjax.create(name, o); |
---|
333 | } else { |
---|
334 | return; |
---|
335 | } |
---|
336 | } |
---|
337 | var args = Array.prototype.slice.call(arguments, 1); |
---|
338 | managed[name][n].apply(managed[name], args); |
---|
339 | }; |
---|
340 | }); |
---|
341 | |
---|
342 | })(jQuery); |
---|