JQuery Ajax Bilder per Ajax übermitteln (AjaxUpload)

Gepostet am Februar 13, 2012

In folgenden Beispiel wollen wir eine Datei per Ajax übermitteln, ohne den Submitbutton betätigen zu müssen und gleichzeitig ein paar Input-Values.

1. JQuery „ajaxupload.js“ einbinden

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
/**
 * AJAX Upload ( http://valums.com/ajax-upload/ ) 
 * Copyright (c) Andris Valums
 * Licensed under the MIT license ( http://valums.com/mit-license/ )
 * Thanks to Gary Haran, David Mark, Corey Burns and others for contributions 
 */
(function () {
    /* global window */
    /* jslint browser: true, devel: true, undef: true, nomen: true, bitwise: true, regexp: true, newcap: true, immed: true */
 
    /**
     * Wrapper for FireBug's console.log
     */
    function log(){
        if (typeof(console) != 'undefined' && typeof(console.log) == 'function'){            
            Array.prototype.unshift.call(arguments, '[Ajax Upload]');
            console.log( Array.prototype.join.call(arguments, ' '));
        }
    } 
 
    /**
     * Attaches event to a dom element.
     * @param {Element} el
     * @param type event name
     * @param fn callback This refers to the passed element
     */
    function addEvent(el, type, fn){
        if (el.addEventListener) {
            el.addEventListener(type, fn, false);
        } else if (el.attachEvent) {
            el.attachEvent('on' + type, function(){
                fn.call(el);
	        });
	    } else {
            throw new Error('not supported or DOM not loaded');
        }
    }   
 
    /**
     * Attaches resize event to a window, limiting
     * number of event fired. Fires only when encounteres
     * delay of 100 after series of events.
     * 
     * Some browsers fire event multiple times when resizing
     * http://www.quirksmode.org/dom/events/resize.html
     * 
     * @param fn callback This refers to the passed element
     */
    function addResizeEvent(fn){
        var timeout;
 
	    addEvent(window, 'resize', function(){
            if (timeout){
                clearTimeout(timeout);
            }
            timeout = setTimeout(fn, 100);                        
        });
    }    
 
    // Needs more testing, will be rewriten for next version        
    // getOffset function copied from jQuery lib (http://jquery.com/)
    if (document.documentElement.getBoundingClientRect){
        // Get Offset using getBoundingClientRect
        // http://ejohn.org/blog/getboundingclientrect-is-awesome/
        var getOffset = function(el){
            var box = el.getBoundingClientRect();
            var doc = el.ownerDocument;
            var body = doc.body;
            var docElem = doc.documentElement; // for ie 
            var clientTop = docElem.clientTop || body.clientTop || 0;
            var clientLeft = docElem.clientLeft || body.clientLeft || 0;
 
            // In Internet Explorer 7 getBoundingClientRect property is treated as physical,
            // while others are logical. Make all logical, like in IE8.	
            var zoom = 1;            
            if (body.getBoundingClientRect) {
                var bound = body.getBoundingClientRect();
                zoom = (bound.right - bound.left) / body.clientWidth;
            }
 
            if (zoom > 1) {
                clientTop = 0;
                clientLeft = 0;
            }
 
            var top = box.top / zoom + (window.pageYOffset || docElem && docElem.scrollTop / zoom || body.scrollTop / zoom) - clientTop, left = box.left / zoom + (window.pageXOffset || docElem && docElem.scrollLeft / zoom || body.scrollLeft / zoom) - clientLeft;
 
            return {
                top: top,
                left: left
            };
        };        
    } else {
        // Get offset adding all offsets 
        var getOffset = function(el){
            var top = 0, left = 0;
            do {
                top += el.offsetTop || 0;
                left += el.offsetLeft || 0;
                el = el.offsetParent;
            } while (el);
 
            return {
                left: left,
                top: top
            };
        };
    }
 
    /**
     * Returns left, top, right and bottom properties describing the border-box,
     * in pixels, with the top-left relative to the body
     * @param {Element} el
     * @return {Object} Contains left, top, right,bottom
     */
    function getBox(el){
        var left, right, top, bottom;
        var offset = getOffset(el);
        left = offset.left;
        top = offset.top;
 
        right = left + el.offsetWidth;
        bottom = top + el.offsetHeight;
 
        return {
            left: left,
            right: right,
            top: top,
            bottom: bottom
        };
    }
 
    /**
     * Helper that takes object literal
     * and add all properties to element.style
     * @param {Element} el
     * @param {Object} styles
     */
    function addStyles(el, styles){
        for (var name in styles) {
            if (styles.hasOwnProperty(name)) {
                el.style[name] = styles[name];
            }
        }
    }
 
    /**
     * Function places an absolutely positioned
     * element on top of the specified element
     * copying position and dimentions.
     * @param {Element} from
     * @param {Element} to
     */    
    function copyLayout(from, to){
	    var box = getBox(from);
 
        addStyles(to, {
	        position: 'absolute',                    
	        left : box.left + 'px',
	        top : box.top + 'px',
	        width : from.offsetWidth + 'px',
	        height : from.offsetHeight + 'px'
	    });        
    }
 
    /**
    * Creates and returns element from html chunk
    * Uses innerHTML to create an element
    */
    var toElement = (function(){
        var div = document.createElement('div');
        return function(html){
            div.innerHTML = html;
            var el = div.firstChild;
            return div.removeChild(el);
        };
    })();
 
    /**
     * Function generates unique id
     * @return unique id 
     */
    var getUID = (function(){
        var id = 0;
        return function(){
            return 'ValumsAjaxUpload' + id++;
        };
    })();        
 
    /**
     * Get file name from path
     * @param {String} file path to file
     * @return filename
     */  
    function fileFromPath(file){
        return file.replace(/.*(\/|\\)/, "");
    }
 
    /**
     * Get file extension lowercase
     * @param {String} file name
     * @return file extenstion
     */    
    function getExt(file){
        return (-1 !== file.indexOf('.')) ? file.replace(/.*[.]/, '') : '';
    }
 
    function hasClass(el, name){        
        var re = new RegExp('\\b' + name + '\\b');        
        return re.test(el.className);
    }    
    function addClass(el, name){
        if ( ! hasClass(el, name)){   
            el.className += ' ' + name;
        }
    }    
    function removeClass(el, name){
        var re = new RegExp('\\b' + name + '\\b');                
        el.className = el.className.replace(re, '');        
    }
 
    function removeNode(el){
        el.parentNode.removeChild(el);
    }
 
    /**
     * Easy styling and uploading
     * @constructor
     * @param button An element you want convert to 
     * upload button. Tested dimentions up to 500x500px
     * @param {Object} options See defaults below.
     */
    window.AjaxUpload = function(button, options){
        this._settings = {
            // Location of the server-side upload script
            action: 'upload.php',
            // File upload name
            name: 'userfile',
            // Additional data to send
            data: {},
            // Submit file as soon as it's selected
            autoSubmit: true,
            // The type of data that you're expecting back from the server.
            // html and xml are detected automatically.
            // Only useful when you are using json data as a response.
            // Set to "json" in that case. 
            responseType: false,
            // Class applied to button when mouse is hovered
            hoverClass: 'hover',
            // Class applied to button when AU is disabled
            disabledClass: 'disabled',            
            // When user selects a file, useful with autoSubmit disabled
            // You can return false to cancel upload			
            onChange: function(file, extension){
            },
            // Callback to fire before file is uploaded
            // You can return false to cancel upload
            onSubmit: function(file, extension){
            },
            // Fired when file upload is completed
            // WARNING! DO NOT USE "FALSE" STRING AS A RESPONSE!
            onComplete: function(file, response){
            }
        };
 
        // Merge the users options with our defaults
        for (var i in options) {
            if (options.hasOwnProperty(i)){
                this._settings[i] = options[i];
            }
        }
 
        // button isn't necessary a dom element
        if (button.jquery){
            // jQuery object was passed
            button = button[0];
        } else if (typeof button == "string") {
            if (/^#.*/.test(button)){
                // If jQuery user passes #elementId don't break it					
                button = button.slice(1);                
            }
 
            button = document.getElementById(button);
        }
 
        if ( ! button || button.nodeType !== 1){
            throw new Error("Please make sure that you're passing a valid element"); 
        }
 
        if ( button.nodeName.toUpperCase() == 'A'){
            // disable link                       
            addEvent(button, 'click', function(e){
                if (e && e.preventDefault){
                    e.preventDefault();
                } else if (window.event){
                    window.event.returnValue = false;
                }
            });
        }
 
        // DOM element
        this._button = button;        
        // DOM element                 
        this._input = null;
        // If disabled clicking on button won't do anything
        this._disabled = false;
 
        // if the button was disabled before refresh if will remain
        // disabled in FireFox, let's fix it
        this.enable();        
 
        this._rerouteClicks();
    };
 
    // assigning methods to our class
    AjaxUpload.prototype = {
        setData: function(data){
            this._settings.data = data;
        },
        disable: function(){            
            addClass(this._button, this._settings.disabledClass);
            this._disabled = true;
 
            var nodeName = this._button.nodeName.toUpperCase();            
            if (nodeName == 'INPUT' || nodeName == 'BUTTON'){
                this._button.setAttribute('disabled', 'disabled');
            }            
 
            // hide input
            if (this._input){
                // We use visibility instead of display to fix problem with Safari 4
                // The problem is that the value of input doesn't change if it 
                // has display none when user selects a file           
                this._input.parentNode.style.visibility = 'hidden';
            }
        },
        enable: function(){
            removeClass(this._button, this._settings.disabledClass);
            this._button.removeAttribute('disabled');
            this._disabled = false;
 
        },
        /**
         * Creates invisible file input 
         * that will hover above the button
         * <div><input type='file' /></div>
         */
        _createInput: function(){ 
            var self = this;
 
            var input = document.createElement("input");
            input.setAttribute('type', 'file');
            input.setAttribute('name', this._settings.name);
 
            addStyles(input, {
                'position' : 'absolute',
                // in Opera only 'browse' button
                // is clickable and it is located at
                // the right side of the input
                'right' : 0,
                'margin' : 0,
                'padding' : 0,
                'fontSize' : '480px',                
                'cursor' : 'pointer'
            });            
 
            var div = document.createElement("div");                        
            addStyles(div, {
                'display' : 'block',
                'position' : 'absolute',
                'overflow' : 'hidden',
                'margin' : 0,
                'padding' : 0,                
                'opacity' : 0,
                // Make sure browse button is in the right side
                // in Internet Explorer
                'direction' : 'ltr',
                //Max zIndex supported by Opera 9.0-9.2
                'zIndex': 2147483583
            });
 
            // Make sure that element opacity exists.
            // Otherwise use IE filter            
            if ( div.style.opacity !== "0") {
                if (typeof(div.filters) == 'undefined'){
                    throw new Error('Opacity not supported by the browser');
                }
                div.style.filter = "alpha(opacity=0)";
            }            
 
            addEvent(input, 'change', function(){
 
                if ( ! input || input.value === ''){                
                    return;                
                }
 
                // Get filename from input, required                
                // as some browsers have path instead of it          
                var file = fileFromPath(input.value);
 
                if (false === self._settings.onChange.call(self, file, getExt(file))){
                    self._clearInput();                
                    return;
                }
 
                // Submit form when value is changed
                if (self._settings.autoSubmit) {
                    self.submit();
                }
            });            
 
            addEvent(input, 'mouseover', function(){
                addClass(self._button, self._settings.hoverClass);
            });
 
            addEvent(input, 'mouseout', function(){
                removeClass(self._button, self._settings.hoverClass);
 
                // We use visibility instead of display to fix problem with Safari 4
                // The problem is that the value of input doesn't change if it 
                // has display none when user selects a file           
                input.parentNode.style.visibility = 'hidden';
 
            });   
 
	        div.appendChild(input);
            document.body.appendChild(div);
 
            this._input = input;
        },
        _clearInput : function(){
            if (!this._input){
                return;
            }            
 
            // this._input.value = ''; Doesn't work in IE6                               
            removeNode(this._input.parentNode);
            this._input = null;                                                                   
            this._createInput();
 
            removeClass(this._button, this._settings.hoverClass);
        },
        /**
         * Function makes sure that when user clicks upload button,
         * the this._input is clicked instead
         */
        _rerouteClicks: function(){
            var self = this;
 
            // IE will later display 'access denied' error
            // if you use using self._input.click()
            // other browsers just ignore click()
 
            addEvent(self._button, 'mouseover', function(){
                if (self._disabled){
                    return;
                }
 
                if ( ! self._input){
	                self._createInput();
                }
 
                var div = self._input.parentNode;                            
                copyLayout(self._button, div);
                div.style.visibility = 'visible';
 
            });
 
 
            // commented because we now hide input on mouseleave
            /**
             * When the window is resized the elements 
             * can be misaligned if button position depends
             * on window size
             */
            //addResizeEvent(function(){
            //    if (self._input){
            //        copyLayout(self._button, self._input.parentNode);
            //    }
            //});            
 
        },
        /**
         * Creates iframe with unique name
         * @return {Element} iframe
         */
        _createIframe: function(){
            // We can't use getTime, because it sometimes return
            // same value in safari :(
            var id = getUID();            
 
            // We can't use following code as the name attribute
            // won't be properly registered in IE6, and new window
            // on form submit will open
            // var iframe = document.createElement('iframe');
            // iframe.setAttribute('name', id);                        
 
            var iframe = toElement('<iframe src="javascript:false;" name="' + id + '" />');
            // src="javascript:false; was added
            // because it possibly removes ie6 prompt 
            // "This page contains both secure and nonsecure items"
            // Anyway, it doesn't do any harm.            
            iframe.setAttribute('id', id);
 
            iframe.style.display = 'none';
            document.body.appendChild(iframe);
 
            return iframe;
        },
        /**
         * Creates form, that will be submitted to iframe
         * @param {Element} iframe Where to submit
         * @return {Element} form
         */
        _createForm: function(iframe){
            var settings = this._settings;
 
            // We can't use the following code in IE6
            // var form = document.createElement('form');
            // form.setAttribute('method', 'post');
            // form.setAttribute('enctype', 'multipart/form-data');
            // Because in this case file won't be attached to request                    
            var form = toElement('<form method="post" enctype="multipart/form-data"></form>');
 
            form.setAttribute('action', settings.action);
            form.setAttribute('target', iframe.name);                                   
            form.style.display = 'none';
            document.body.appendChild(form);
 
            // Create hidden input element for each data key
            for (var prop in settings.data) {
                if (settings.data.hasOwnProperty(prop)){
                    var el = document.createElement("input");
                    el.setAttribute('type', 'hidden');
                    el.setAttribute('name', prop);
                    el.setAttribute('value', settings.data[prop]);
                    form.appendChild(el);
                }
            }
            return form;
        },
        /**
         * Gets response from iframe and fires onComplete event when ready
         * @param iframe
         * @param file Filename to use in onComplete callback 
         */
        _getResponse : function(iframe, file){            
            // getting response
            var toDeleteFlag = false, self = this, settings = this._settings;   
 
            addEvent(iframe, 'load', function(){                
 
                if (// For Safari 
                    iframe.src == "javascript:'%3Chtml%3E%3C/html%3E';" ||
                    // For FF, IE
                    iframe.src == "javascript:'<html></html>';"){                                                                        
                        // First time around, do not delete.
                        // We reload to blank page, so that reloading main page
                        // does not re-submit the post.
 
                        if (toDeleteFlag) {
                            // Fix busy state in FF3
                            setTimeout(function(){
                                removeNode(iframe);
                            }, 0);
                        }
 
                        return;
                }
 
                var doc = iframe.contentDocument ? iframe.contentDocument : window.frames[iframe.id].document;
 
                // fixing Opera 9.26,10.00
                if (doc.readyState && doc.readyState != 'complete') {
                   // Opera fires load event multiple times
                   // Even when the DOM is not ready yet
                   // this fix should not affect other browsers
                   return;
                }
 
                // fixing Opera 9.64
                if (doc.body && doc.body.innerHTML == "false") {
                    // In Opera 9.64 event was fired second time
                    // when body.innerHTML changed from false 
                    // to server response approx. after 1 sec
                    return;
                }
 
                var response;
 
                if (doc.XMLDocument) {
                    // response is a xml document Internet Explorer property
                    response = doc.XMLDocument;
                } else if (doc.body){
                    // response is html document or plain text
                    response = doc.body.innerHTML;
 
                    if (settings.responseType && settings.responseType.toLowerCase() == 'json') {
                        // If the document was sent as 'application/javascript' or
                        // 'text/javascript', then the browser wraps the text in a <pre>
                        // tag and performs html encoding on the contents.  In this case,
                        // we need to pull the original text content from the text node's
                        // nodeValue property to retrieve the unmangled content.
                        // Note that IE6 only understands text/html
                        if (doc.body.firstChild && doc.body.firstChild.nodeName.toUpperCase() == 'PRE') {
                            response = doc.body.firstChild.firstChild.nodeValue;
                        }
 
                        if (response) {
                            response = eval("(" + response + ")");
                        } else {
                            response = {};
                        }
                    }
                } else {
                    // response is a xml document
                    response = doc;
                }
 
                settings.onComplete.call(self, file, response);
 
                // Reload blank page, so that reloading main page
                // does not re-submit the post. Also, remember to
                // delete the frame
                toDeleteFlag = true;
 
                // Fix IE mixed content issue
                iframe.src = "javascript:'<html></html>';";
            });            
        },        
        /**
         * Upload file contained in this._input
         */
        submit: function(){                        
            var self = this, settings = this._settings;
 
            if ( ! this._input || this._input.value === ''){                
                return;                
            }
 
            var file = fileFromPath(this._input.value);
 
            // user returned false to cancel upload
            if (false === settings.onSubmit.call(this, file, getExt(file))){
                this._clearInput();                
                return;
            }
 
            // sending request    
            var iframe = this._createIframe();
            var form = this._createForm(iframe);
 
            // assuming following structure
            // div -> input type='file'
            removeNode(this._input.parentNode);            
            removeClass(self._button, self._settings.hoverClass);
 
            form.appendChild(this._input);
 
            form.submit();
 
            // request set, clean up                
            removeNode(form); form = null;                          
            removeNode(this._input); this._input = null;
 
            // Get response from iframe and fire onComplete event when ready
            this._getResponse(iframe, file);            
 
            // get ready for next request            
            this._createInput();
        }
    };
})();

2. HTML-Script

1
2
3
4
5
6
7
8
<form id="fileupload" enctype="multipart/form-data" method="post" action="/admin/upload/image">
<input type="hidden" name="MAX_FILE_SIZE" value="2097152" id="MAX_FILE_SIZE">
<input type="submit" name="submit" id="submit" value="Submit">
<input type="hidden" name="width" value="400" id="width">
<input type="hidden" name="height" value="80" id="height">
<input type="hidden" name="quality" value="80" id="quality">
<input type="hidden" name="rename" value="logo" id="rename">
</form>

3. JQuery Script

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
<script>
$(document).ready(function(){
	//LOGO uload
	var thumb = $('img#thumb');	
	var formname = 'form#fileupload';
	$('#submit').hide();
 
	//ajax upload
	new AjaxUpload('extract', {
		action: $(formname).attr('action'),
		name: 'extract',
		onSubmit: function(file, extension) {
			$(thumb).addClass('loading');
			this.setData({ 
				width : $('#width').val(),
				height : $('#height').val(),
				quality : $('#quality').val(),
				rename : $('#rename').val()
			}); 
		},
		onComplete: function(file, response) {
			if (response.substr(-3)=='jpg') {
				thumb.load(function(){
					$(thumb).removeClass('loading');
					thumb.unbind();
				});
				thumb.attr('src', '/images/'+response);
				response = response.replace(".","-dot-");
				$.ajax({
				  url: "<?= $this->logosaveAction; ?>/item_companyLogo/"+response,
				  context: document.body,
				  success: function(){ }
			    });
			} else alert(response);
		}
	});
 
});
</script>

Tags: , ,

Leave a Reply

 

Posts of Current Category



Facebook: