322 lines
9.4 KiB
JavaScript
322 lines
9.4 KiB
JavaScript
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/*
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* Default text - jQuery plugin for html5 dragging files from desktop to browser
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*
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* Author: Weixi Yen
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*
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* Email: [Firstname][Lastname]@gmail.com
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*
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* Copyright (c) 2010 Resopollution
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*
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* Licensed under the MIT license:
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* http://www.opensource.org/licenses/mit-license.php
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*
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* Project home:
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* http://www.github.com/weixiyen/jquery-filedrop
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*
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* Version: 0.1.0
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*
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* Features:
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* Allows sending of extra parameters with file.
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* Works with Firefox 3.6+
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* Future-compliant with HTML5 spec (will work with Webkit browsers and IE9)
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* Usage:
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* See README at project homepage
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*
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*/
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(function($){
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jQuery.event.props.push("dataTransfer");
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var opts = {},
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default_opts = {
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url: '',
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refresh: 1000,
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paramname: 'userfile',
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maxfiles: 25,
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maxfilesize: 1, // MBs
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data: {},
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drop: empty,
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dragEnter: empty,
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dragOver: empty,
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dragLeave: empty,
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docEnter: empty,
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docOver: empty,
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docLeave: empty,
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beforeEach: empty,
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afterAll: empty,
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rename: empty,
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error: function(err, file, i){
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alert(err);
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},
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uploadStarted: empty,
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uploadFinished: empty,
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progressUpdated: empty,
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speedUpdated: empty
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},
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errors = ["BrowserNotSupported", "TooManyFiles", "FileTooLarge"],
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doc_leave_timer,
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stop_loop = false,
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files_count = 0,
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files;
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$.fn.filedrop = function(options) {
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opts = $.extend( {}, default_opts, options );
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this.bind('drop', drop).bind('dragenter', dragEnter).bind('dragover', dragOver).bind('dragleave', dragLeave);
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$(document).bind('drop', docDrop).bind('dragenter', docEnter).bind('dragover', docOver).bind('dragleave', docLeave);
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};
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function drop(e) {
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opts.drop(e);
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files = e.dataTransfer.files;
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if (files === null || files === undefined) {
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opts.error(errors[0]);
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return false;
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}
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files_count = files.length;
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upload();
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e.preventDefault();
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return false;
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}
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function getBuilder(filename, filedata, boundary) {
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var dashdash = '--',
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crlf = '\r\n',
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builder = '';
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$.each(opts.data, function(i, val) {
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if (typeof val === 'function') val = val();
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builder += dashdash;
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builder += boundary;
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builder += crlf;
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builder += 'Content-Disposition: form-data; name="'+i+'"';
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builder += crlf;
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builder += crlf;
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builder += val;
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builder += crlf;
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});
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builder += dashdash;
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builder += boundary;
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builder += crlf;
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builder += 'Content-Disposition: form-data; name="'+opts.paramname+'"';
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builder += '; filename="' + filename + '"';
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builder += crlf;
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builder += 'Content-Type: application/octet-stream';
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builder += crlf;
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builder += crlf;
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builder += filedata;
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builder += crlf;
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builder += dashdash;
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builder += boundary;
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builder += dashdash;
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builder += crlf;
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return builder;
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}
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function progress(e) {
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if (e.lengthComputable) {
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var percentage = Math.round((e.loaded * 100) / e.total);
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if (this.currentProgress != percentage) {
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this.currentProgress = percentage;
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opts.progressUpdated(this.index, this.file, this.currentProgress);
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var elapsed = new Date().getTime();
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var diffTime = elapsed - this.currentStart;
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if (diffTime >= opts.refresh) {
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var diffData = e.loaded - this.startData;
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var speed = diffData / diffTime; // KB per second
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opts.speedUpdated(this.index, this.file, speed);
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this.startData = e.loaded;
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this.currentStart = elapsed;
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}
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}
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}
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}
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function upload() {
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stop_loop = false;
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if (!files) {
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opts.error(errors[0]);
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return false;
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}
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var filesDone = 0,
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filesRejected = 0;
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if (files_count > opts.maxfiles) {
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opts.error(errors[1]);
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return false;
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}
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for (var i=0; i<files_count; i++) {
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if (stop_loop) return false;
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try {
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if (beforeEach(files[i]) != false) {
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if (i === files_count) return;
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var reader = new FileReader(),
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max_file_size = 1048576 * opts.maxfilesize;
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reader.index = i;
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if (files[i].size > max_file_size) {
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opts.error(errors[2], files[i], i);
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filesRejected++;
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continue;
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}
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reader.onloadend = send;
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reader.readAsBinaryString(files[i]);
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} else {
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filesRejected++;
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}
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} catch(err) {
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opts.error(errors[0]);
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return false;
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}
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}
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function send(e) {
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// Sometimes the index is not attached to the
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// event object. Find it by size. Hack for sure.
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if (e.target.index == undefined) {
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e.target.index = getIndexBySize(e.total);
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}
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var xhr = new XMLHttpRequest(),
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upload = xhr.upload,
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file = files[e.target.index],
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index = e.target.index,
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start_time = new Date().getTime(),
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boundary = '------multipartformboundary' + (new Date).getTime(),
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builder;
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newName = rename(file.name);
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if (typeof newName === "string") {
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builder = getBuilder(newName, e.target.result, boundary);
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} else {
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builder = getBuilder(file.name, e.target.result, boundary);
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}
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upload.index = index;
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upload.file = file;
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upload.downloadStartTime = start_time;
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upload.currentStart = start_time;
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upload.currentProgress = 0;
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upload.startData = 0;
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upload.addEventListener("progress", progress, false);
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var directory = "";
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if($("#directory").val()){
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directory = "?directory="+$("#directory").val();
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}
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xhr.open("POST", opts.url+directory, true);
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xhr.setRequestHeader('content-type', 'multipart/form-data; boundary='
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+ boundary);
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xhr.sendAsBinary(builder);
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opts.uploadStarted(index, file, files_count);
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xhr.onload = function() {
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if (xhr.responseText) {
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var now = new Date().getTime(),
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timeDiff = now - start_time,
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result = opts.uploadFinished(index, file, jQuery.parseJSON(xhr.responseText), timeDiff);
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filesDone++;
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if (filesDone == files_count - filesRejected) {
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afterAll();
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}
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if (result === false) stop_loop = true;
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}
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};
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}
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}
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function getIndexBySize(size) {
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for (var i=0; i < files_count; i++) {
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if (files[i].size == size) {
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return i;
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}
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}
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return undefined;
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}
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function rename(name) {
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return opts.rename(name);
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}
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function beforeEach(file) {
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return opts.beforeEach(file);
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}
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function afterAll() {
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return opts.afterAll();
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}
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function dragEnter(e) {
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clearTimeout(doc_leave_timer);
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e.preventDefault();
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opts.dragEnter(e);
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}
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function dragOver(e) {
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clearTimeout(doc_leave_timer);
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e.preventDefault();
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opts.docOver(e);
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opts.dragOver(e);
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}
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function dragLeave(e) {
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clearTimeout(doc_leave_timer);
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opts.dragLeave(e);
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e.stopPropagation();
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}
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function docDrop(e) {
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e.preventDefault();
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opts.docLeave(e);
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return false;
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}
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function docEnter(e) {
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clearTimeout(doc_leave_timer);
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e.preventDefault();
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opts.docEnter(e);
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return false;
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}
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function docOver(e) {
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clearTimeout(doc_leave_timer);
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e.preventDefault();
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opts.docOver(e);
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return false;
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}
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function docLeave(e) {
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doc_leave_timer = setTimeout(function(){
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opts.docLeave(e);
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}, 200);
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}
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function empty(){}
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try {
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if (XMLHttpRequest.prototype.sendAsBinary) return;
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XMLHttpRequest.prototype.sendAsBinary = function(datastr) {
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function byteValue(x) {
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return x.charCodeAt(0) & 0xff;
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}
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var ords = Array.prototype.map.call(datastr, byteValue);
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var ui8a = new Uint8Array(ords);
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this.send(ui8a.buffer);
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}
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} catch(e) {}
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})(jQuery);
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