forked from weixiyen/jquery-filedrop
-
Notifications
You must be signed in to change notification settings - Fork 0
/
jquery.filedrop.js
448 lines (371 loc) · 12.6 KB
/
jquery.filedrop.js
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
/*
* Default text - jQuery plugin for html5 dragging files from desktop to browser
*
* Author: Weixi Yen
*
* Email: [Firstname][Lastname]@gmail.com
*
* Copyright (c) 2010 Resopollution
*
* Licensed under the MIT license:
* http://www.opensource.org/licenses/mit-license.php
*
* Project home:
* http://www.github.com/weixiyen/jquery-filedrop
*
* Version: 0.1.0
*
* Features:
* Allows sending of extra parameters with file.
* Works with Firefox 3.6+
* Future-compliant with HTML5 spec (will work with Webkit browsers and IE9)
* Usage:
* See README at project homepage
*
*/
;(function($) {
jQuery.event.props.push("dataTransfer");
var opts = {},
default_opts = {
fallback_id: '',
url: '',
refresh: 1000,
paramname: 'userfile',
maxfiles: 25, // Ignored if queuefiles is set > 0
maxfilesize: 1, // MB file size limit
queuefiles: 0, // Max files before queueing (for large volume uploads)
queuewait: 200, // Queue wait time if full
data: {},
headers: {},
drop: empty,
dragEnter: empty,
dragOver: empty,
dragLeave: empty,
docEnter: empty,
docOver: empty,
docLeave: empty,
beforeEach: empty,
afterAll: empty,
rename: empty,
error: function(err, file, i) {
alert(err);
},
uploadStarted: empty,
uploadFinished: empty,
progressUpdated: empty,
speedUpdated: empty
},
errors = ["BrowserNotSupported", "TooManyFiles", "FileTooLarge"],
doc_leave_timer,
stop_loop = false,
files_count = 0,
files;
function empty() {}
$.fn.filedrop = function(method) {
var methods = {
init : function(options) {
// Already initialized
if($(this).data('filedrop') != undefined || $(this).data('filedrop') != null)
return false;
var tb = new filedropInstance(this, options);
tb.init();
$(this).data('filedrop',tb);
},
destroy : function( ) {
$(this).data('filedrop').destroy();
$(this).data('filedrop',null);
}
};
if ( methods[method] ) {
return methods[method].apply( this, Array.prototype.slice.call( arguments, 1 ));
} else if ( typeof method === 'object' || ! method ) {
return methods.init.apply( this, arguments );
} else {
$.error( 'Method ' + method + ' does not exist on jQuery.filedrop' );
}
function filedropInstance(element, options) {
this.init = function() {
opts = $.extend({}, default_opts, options);
element.bind('drop.filedrop', drop).bind('dragenter.filedrop', dragEnter).bind('dragover.filedrop', dragOver).bind('dragleave.filedrop', dragLeave);
$(document).bind('drop.filedrop', docDrop).bind('dragenter.filedrop', docEnter).bind('dragover.filedrop', docOver).bind('dragleave.filedrop', docLeave);
$('#' + opts.fallback_id).bind('change.filedrop', function(e) {
opts.drop(e);
files = e.target.files;
files_count = files.length;
upload();
});
};
this.destroy = function() {
element.unbind('.filedrop');
$(document).unbind('.filedrop');
$('#' + opts.fallback_id).unbind('.filedrop');
};
function drop(e) {
opts.drop(e);
files = e.dataTransfer.files;
if (files === null || files === undefined) {
opts.error(errors[0]);
return false;
}
files_count = files.length;
upload();
e.preventDefault();
return false;
}
function getBuilder(filename, filedata, mime, boundary) {
var dashdash = '--',
crlf = '\r\n',
builder = '';
if (opts.data) {
var params = $.param(opts.data).split(/&/);
$.each(params, function() {
var pair = this.split(/=/, 2);
var name = decodeURI(pair[0]);
var val = decodeURI(pair[1]);
builder += dashdash;
builder += boundary;
builder += crlf;
builder += 'Content-Disposition: form-data; name="' + name + '"';
builder += crlf;
builder += crlf;
builder += val;
builder += crlf;
});
}
builder += dashdash;
builder += boundary;
builder += crlf;
builder += 'Content-Disposition: form-data; name="' + opts.paramname + '"';
builder += '; filename="' + filename + '"';
builder += crlf;
builder += 'Content-Type: ' + mime;
builder += crlf;
builder += crlf;
builder += filedata;
builder += crlf;
builder += dashdash;
builder += boundary;
builder += dashdash;
builder += crlf;
return builder;
}
function progress(e) {
if (e.lengthComputable) {
var percentage = Math.round((e.loaded * 100) / e.total);
if (this.currentProgress != percentage) {
this.currentProgress = percentage;
opts.progressUpdated(this.index, this.file, this.currentProgress);
var elapsed = new Date().getTime();
var diffTime = elapsed - this.currentStart;
if (diffTime >= opts.refresh) {
var diffData = e.loaded - this.startData;
var speed = diffData / diffTime; // KB per second
opts.speedUpdated(this.index, this.file, speed);
this.startData = e.loaded;
this.currentStart = elapsed;
}
}
}
}
// Respond to an upload
function upload() {
stop_loop = false;
if (!files) {
opts.error(errors[0]);
return false;
}
var filesDone = 0,
filesRejected = 0;
if (files_count > opts.maxfiles && opts.queuefiles === 0) {
opts.error(errors[1]);
return false;
}
// Define queues to manage upload process
var workQueue = [];
var processingQueue = [];
var doneQueue = [];
// Add everything to the workQueue
for (var i = 0; i < files_count; i++) {
workQueue.push(i);
}
// Helper function to enable pause of processing to wait
// for in process queue to complete
var pause = function(timeout) {
setTimeout(process, timeout);
return;
}
// Process an upload, recursive
var process = function() {
var fileIndex;
if (stop_loop) return false;
// Check to see if are in queue mode
if (opts.queuefiles > 0 && processingQueue.length >= opts.queuefiles) {
return pause(opts.queuewait);
} else {
// Take first thing off work queue
fileIndex = workQueue[0];
workQueue.splice(0, 1);
// Add to processing queue
processingQueue.push(fileIndex);
}
try {
if (beforeEach(files[fileIndex]) != false) {
if (fileIndex === files_count) return;
var reader = new FileReader(),
max_file_size = 1048576 * opts.maxfilesize;
reader.index = fileIndex;
if (files[fileIndex].size > max_file_size) {
opts.error(errors[2], files[fileIndex], fileIndex);
// Remove from queue
processingQueue.forEach(function(value, key) {
if (value === fileIndex) processingQueue.splice(key, 1);
});
filesRejected++;
return true;
}
reader.onloadend = send;
reader.readAsBinaryString(files[fileIndex]);
} else {
filesRejected++;
}
} catch (err) {
// Remove from queue
processingQueue.forEach(function(value, key) {
if (value === fileIndex) processingQueue.splice(key, 1);
});
opts.error(errors[0]);
return false;
}
// If we still have work to do,
if (workQueue.length > 0) {
process();
}
};
var send = function(e) {
var fileIndex = ((typeof(e.srcElement) === "undefined") ? e.target : e.srcElement).index
// Sometimes the index is not attached to the
// event object. Find it by size. Hack for sure.
if (e.target.index == undefined) {
e.target.index = getIndexBySize(e.total);
}
var xhr = new XMLHttpRequest(),
upload = xhr.upload,
file = files[e.target.index],
index = e.target.index,
start_time = new Date().getTime(),
boundary = '------multipartformboundary' + (new Date).getTime(),
builder;
newName = rename(file.name);
mime = file.type
if (typeof newName === "string") {
builder = getBuilder(newName, e.target.result, mime, boundary);
} else {
builder = getBuilder(file.name, e.target.result, mime, boundary);
}
upload.index = index;
upload.file = file;
upload.downloadStartTime = start_time;
upload.currentStart = start_time;
upload.currentProgress = 0;
upload.startData = 0;
upload.addEventListener("progress", progress, false);
xhr.open("POST", opts.url, true);
xhr.setRequestHeader('content-type', 'multipart/form-data; boundary=' + boundary);
xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
// Add headers
$.each(opts.headers, function(k, v) {
xhr.setRequestHeader(k, v);
});
xhr.sendAsBinary(builder);
opts.uploadStarted(index, file, files_count);
xhr.onload = function() {
if (xhr.responseText) {
var now = new Date().getTime(),
timeDiff = now - start_time,
result = opts.uploadFinished(index, file, jQuery.parseJSON(xhr.responseText), timeDiff);
filesDone++;
// Remove from processing queue
processingQueue.forEach(function(value, key) {
if (value === fileIndex) processingQueue.splice(key, 1);
});
// Add to donequeue
doneQueue.push(fileIndex);
if (filesDone == files_count - filesRejected) {
afterAll();
}
if (result === false) stop_loop = true;
}
};
}
// Initiate the processing loop
process();
}
function getIndexBySize(size) {
for (var i = 0; i < files_count; i++) {
if (files[i].size == size) {
return i;
}
}
return undefined;
}
function rename(name) {
return opts.rename(name);
}
function beforeEach(file) {
return opts.beforeEach(file);
}
function afterAll() {
return opts.afterAll();
}
function dragEnter(e) {
clearTimeout(doc_leave_timer);
e.preventDefault();
opts.dragEnter(e);
}
function dragOver(e) {
clearTimeout(doc_leave_timer);
e.preventDefault();
opts.docOver(e);
opts.dragOver(e);
}
function dragLeave(e) {
clearTimeout(doc_leave_timer);
opts.dragLeave(e);
e.stopPropagation();
}
function docDrop(e) {
e.preventDefault();
opts.docLeave(e);
return false;
}
function docEnter(e) {
clearTimeout(doc_leave_timer);
e.preventDefault();
opts.docEnter(e);
return false;
}
function docOver(e) {
clearTimeout(doc_leave_timer);
e.preventDefault();
opts.docOver(e);
return false;
}
function docLeave(e) {
doc_leave_timer = setTimeout(function() {
opts.docLeave(e);
}, 200);
}
try {
if (XMLHttpRequest.prototype.sendAsBinary) return;
XMLHttpRequest.prototype.sendAsBinary = function(datastr) {
function byteValue(x) {
return x.charCodeAt(0) & 0xff;
}
var ords = Array.prototype.map.call(datastr, byteValue);
var ui8a = new Uint8Array(ords);
this.send(ui8a.buffer);
}
} catch (e) {}
} // End of fileDropInstance()
}; // End of $.fn.filedrop()
})(jQuery);