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SimpleAjaxUploader.js
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/**
* Simple Ajax Uploader
* Version 2.2.2
* https://github.com/LPology/Simple-Ajax-Uploader
*
* Copyright 2012-2015 LPology, LLC
* Released under the MIT license
*/
;(function( global, factory ) {
if ( typeof define === 'function' && define.amd ) {
define( function() {
return factory( global );
});
} else if ( typeof module === 'object' && module.exports ) {
module.exports = factory( global );
} else {
global.ss = factory( global );
}
}( typeof window !== 'undefined' ? window : this, function( window ) {
var ss = window.ss || {},
// ss.trim()
rLWhitespace = /^\s+/,
rTWhitespace = /\s+$/,
// ss.getUID
uidReplace = /[xy]/g,
// ss.getFilename()
rPath = /.*(\/|\\)/,
// ss.getExt()
rExt = /.*[.]/,
// ss.hasClass()
rHasClass = /[\t\r\n]/g,
// Check for Safari -- it doesn't like multi file uploading. At all.
// http://stackoverflow.com/a/9851769/1091949
isSafari = Object.prototype.toString.call( window.HTMLElement ).indexOf( 'Constructor' ) > 0,
isIE7 = ( navigator.userAgent.indexOf('MSIE 7') !== -1 ),
// Check whether XHR uploads are supported
input = document.createElement( 'input' ),
XhrOk;
input.type = 'file';
XhrOk = ( 'multiple' in input &&
typeof File !== 'undefined' &&
typeof ( new XMLHttpRequest() ).upload !== 'undefined' );
/**
* Converts object to query string
*/
ss.obj2string = function( obj, prefix ) {
"use strict";
var str = [];
for ( var prop in obj ) {
if ( obj.hasOwnProperty( prop ) ) {
var k = prefix ? prefix + '[' + prop + ']' : prop, v = obj[prop];
str.push( typeof v === 'object' ?
ss.obj2string( v, k ) :
encodeURIComponent( k ) + '=' + encodeURIComponent( v ) );
}
}
return str.join( '&' );
};
/**
* Copies all missing properties from second object to first object
*/
ss.extendObj = function( first, second ) {
"use strict";
for ( var prop in second ) {
if ( second.hasOwnProperty( prop ) ) {
first[prop] = second[prop];
}
}
};
ss.addEvent = function( elem, type, fn ) {
"use strict";
if ( elem.addEventListener ) {
elem.addEventListener( type, fn, false );
} else {
elem.attachEvent( 'on' + type, fn );
}
return function() {
ss.removeEvent( elem, type, fn );
};
};
ss.removeEvent = document.removeEventListener ?
function( elem, type, fn ) {
if ( elem.removeEventListener ) {
elem.removeEventListener( type, fn, false );
}
} :
function( elem, type, fn ) {
var name = 'on' + type;
if ( typeof elem[ name ] === 'undefined' ) {
elem[ name ] = null;
}
elem.detachEvent( name, fn );
};
ss.newXHR = function() {
"use strict";
if ( typeof XMLHttpRequest !== 'undefined' ) {
return new window.XMLHttpRequest();
} else if ( window.ActiveXObject ) {
try {
return new window.ActiveXObject( 'Microsoft.XMLHTTP' );
} catch ( err ) {
return false;
}
}
};
ss.getIFrame = function() {
"use strict";
var id = ss.getUID(),
iframe;
// IE7 can only create an iframe this way, all others are the other way
if ( isIE7 ) {
iframe = document.createElement('<iframe src="javascript:false;" name="' + id + '">');
} else {
iframe = document.createElement('iframe');
/*jshint scripturl:true*/
iframe.src = 'javascript:false;';
iframe.name = id;
}
iframe.style.display = 'none';
iframe.id = id;
return iframe;
};
ss.getForm = function( opts ) {
"use strict";
var form = document.createElement('form');
form.encoding = 'multipart/form-data'; // IE
form.enctype = 'multipart/form-data';
form.style.display = 'none';
for ( var prop in opts ) {
if ( opts.hasOwnProperty( prop ) ) {
form[prop] = opts[prop];
}
}
return form;
};
ss.getHidden = function( name, value ) {
"use strict";
var input = document.createElement( 'input' );
input.type = 'hidden';
input.name = name;
input.value = value;
return input;
};
/**
* Parses a JSON string and returns a Javascript object
* Borrowed from www.jquery.com
*/
ss.parseJSON = function( data ) {
"use strict";
if ( !data ) {
return false;
}
data = ss.trim( data + '' );
if ( window.JSON && window.JSON.parse ) {
try {
// Support: Android 2.3
// Workaround failure to string-cast null input
return window.JSON.parse( data + '' );
} catch ( err ) {
return false;
}
}
var rvalidtokens = /(,)|(\[|{)|(}|])|"(?:[^"\\\r\n]|\\["\\\/bfnrt]|\\u[\da-fA-F]{4})*"\s*:?|true|false|null|-?(?!0\d)\d+(?:\.\d+|)(?:[eE][+-]?\d+|)/g,
depth = null,
requireNonComma;
// Guard against invalid (and possibly dangerous) input by ensuring that nothing remains
// after removing valid tokens
return data && !ss.trim( data.replace( rvalidtokens, function( token, comma, open, close ) {
// Force termination if we see a misplaced comma
if ( requireNonComma && comma ) {
depth = 0;
}
// Perform no more replacements after returning to outermost depth
if ( depth === 0 ) {
return token;
}
// Commas must not follow "[", "{", or ","
requireNonComma = open || comma;
// Determine new depth
// array/object open ("[" or "{"): depth += true - false (increment)
// array/object close ("]" or "}"): depth += false - true (decrement)
// other cases ("," or primitive): depth += true - true (numeric cast)
depth += !close - !open;
// Remove this token
return '';
}) ) ?
( Function( 'return ' + data ) )() :
false;
};
ss.getBox = function( elem ) {
"use strict";
var box,
docElem,
top = 0,
left = 0;
if ( elem.getBoundingClientRect ) {
box = elem.getBoundingClientRect();
docElem = document.documentElement;
top = box.top + ( window.pageYOffset || docElem.scrollTop ) - ( docElem.clientTop || 0 );
left = box.left + ( window.pageXOffset || docElem.scrollLeft ) - ( docElem.clientLeft || 0 );
} else {
do {
left += elem.offsetLeft;
top += elem.offsetTop;
} while ( ( elem = elem.offsetParent ) );
}
return {
top: Math.round( top ),
left: Math.round( left )
};
};
/**
* Helper that takes object literal
* and add all properties to element.style
* @param {Element} el
* @param {Object} styles
*/
ss.addStyles = function( elem, styles ) {
"use strict";
for ( var name in styles ) {
if ( styles.hasOwnProperty( name ) ) {
elem.style[name] = styles[name];
}
}
};
/**
* Function places an absolutely positioned
* element on top of the specified element
* copying position and dimensions.
*/
ss.copyLayout = function( from, to ) {
"use strict";
var box = ss.getBox( from );
ss.addStyles( to, {
position: 'absolute',
left : box.left + 'px',
top : box.top + 'px',
width : from.offsetWidth + 'px',
height : from.offsetHeight + 'px'
});
};
/**
* Generates unique ID
* Complies with RFC 4122 version 4
* http://stackoverflow.com/a/2117523/1091949
* ID begins with letter "a" to be safe for HTML elem ID/name attr (can't start w/ number)
*/
ss.getUID = function() {
"use strict";
/*jslint bitwise: true*/
return 'axxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(uidReplace, function(c) {
var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
return v.toString(16);
});
};
/**
* Removes white space from left and right of string
*/
ss.trim = function( text ) {
"use strict";
return text.toString().replace( rLWhitespace, '' ).replace( rTWhitespace, '' );
};
/**
* Extract file name from path
*/
ss.getFilename = function( path ) {
"use strict";
return path.replace( rPath, '' );
};
/**
* Get file extension
*/
ss.getExt = function( file ) {
"use strict";
return ( -1 !== file.indexOf( '.' ) ) ? file.replace( rExt, '' ) : '';
};
/**
* Check whether element has a particular CSS class
* Parts borrowed from www.jquery.com
*/
ss.hasClass = function( elem, name ) {
"use strict";
return ( ' ' + elem.className + ' ' ).replace( rHasClass, ' ' ).indexOf( ' ' + name + ' ' ) >= 0;
};
/**
* Adds CSS class to an element
*/
ss.addClass = function( elem, name ) {
"use strict";
if ( !name || name === '' ) {
return false;
}
if ( !ss.hasClass( elem, name ) ) {
elem.className += ' ' + name;
}
};
/**
* Removes CSS class from an element
*/
ss.removeClass = (function() {
"use strict";
var c = {}; //cache regexps for performance
return function( e, name ) {
if ( !c[name] ) {
c[name] = new RegExp('(?:^|\\s)' + name + '(?!\\S)');
}
e.className = e.className.replace( c[name], '' );
};
})();
/**
* Nulls out event handlers to prevent memory leaks in IE6/IE7
* http://javascript.crockford.com/memory/leak.html
* @param {Element} d
* @return void
*/
ss.purge = function( d ) {
"use strict";
var a = d.attributes, i, l, n;
if ( a ) {
for ( i = a.length - 1; i >= 0; i -= 1 ) {
n = a[i].name;
if ( typeof d[n] === 'function' ) {
d[n] = null;
}
}
}
a = d.childNodes;
if ( a ) {
l = a.length;
for ( i = 0; i < l; i += 1 ) {
ss.purge( d.childNodes[i] );
}
}
};
/**
* Removes element from the DOM
*/
ss.remove = function( elem ) {
"use strict";
if ( elem && elem.parentNode ) {
// null out event handlers for IE
ss.purge( elem );
elem.parentNode.removeChild( elem );
}
elem = null;
};
/**
* Accepts either a jQuery object, a string containing an element ID, or an element,
* verifies that it exists, and returns the element.
* @param {Mixed} elem
* @return {Element}
*/
ss.verifyElem = function( elem ) {
"use strict";
if ( typeof jQuery !== 'undefined' && elem instanceof jQuery ) {
elem = elem[0];
} else if ( typeof elem === 'string' ) {
if ( elem.charAt( 0 ) == '#' ) {
elem = elem.substr( 1 );
}
elem = document.getElementById( elem );
}
if ( !elem || elem.nodeType !== 1 ) {
return false;
}
if ( elem.nodeName.toUpperCase() == 'A' ) {
elem.style.cursor = 'pointer';
ss.addEvent( elem, 'click', function( e ) {
if ( e && e.preventDefault ) {
e.preventDefault();
} else if ( window.event ) {
window.event.returnValue = false;
}
});
}
return elem;
};
ss._options = {};
ss.uploadSetup = function( options ) {
"use strict";
ss.extendObj( ss._options, options );
};
ss.SimpleUpload = function( options ) {
"use strict";
var i,
len,
btn;
this._opts = {
button: '',
url: '',
dropzone: '',
dragClass: '',
cors: false,
progressUrl: false,
sessionProgressUrl: false,
nginxProgressUrl: false,
multiple: false,
maxUploads: 3,
queue: true,
checkProgressInterval: 500,
keyParamName: 'APC_UPLOAD_PROGRESS',
sessionProgressName: 'PHP_SESSION_UPLOAD_PROGRESS',
nginxProgressHeader: 'X-Progress-ID',
corsInputName: 'XHR_CORS_TARGETORIGIN',
allowedExtensions: [],
accept: '',
maxSize: false,
name: '',
data: {},
noParams: false,
autoSubmit: true,
multipart: false,
method: 'POST',
responseType: '',
debug: false,
hoverClass: '',
focusClass: '',
disabledClass: '',
customHeaders: {},
encodeCustomHeaders: false,
onAbort: function( filename, uploadBtn, size ) {},
onChange: function( filename, extension, uploadBtn, size ) {},
onSubmit: function( filename, extension, uploadBtn, size ) {},
onProgress: function( pct ) {},
onUpdateFileSize: function( filesize ) {},
onComplete: function( filename, response, uploadBtn, size ) {},
onExtError: function( filename, extension ) {},
onSizeError: function( filename, fileSize ) {},
onError: function( filename, type, status, statusText, response, uploadBtn, size ) {},
startXHR: function( filename, fileSize, uploadBtn ) {},
endXHR: function( filename, fileSize, uploadBtn ) {},
startNonXHR: function( filename, uploadBtn ) {},
endNonXHR: function( filename, uploadBtn ) {}
};
// Include any setup options
ss.extendObj( this._opts, ss._options );
// Then add options for this instance
ss.extendObj( this._opts, options );
options = null;
this._btns = [];
// An array of buttons was passed
if ( this._opts.button instanceof Array ) {
len = this._opts.button.length;
for ( i = 0; i < len; i++ ) {
btn = ss.verifyElem( this._opts.button[i] );
if ( btn !== false ) {
this._btns.push( this.rerouteClicks( btn ) );
} else {
this.log( 'Button with array index ' + i + ' is invalid' );
}
}
// A single button was passed
} else {
btn = ss.verifyElem( this._opts.button );
if ( btn !== false ) {
this._btns.push( this.rerouteClicks( btn ) );
}
}
delete this._opts.button;
this._opts.button = btn = null;
// No valid elements were passed to button option
if ( this._opts.dropzone === '' && ( this._btns.length < 1 || this._btns[0] === false ) ) {
throw new Error( "Invalid button. Make sure the element you're passing exists." );
}
if ( this._opts.multiple === false ) {
this._opts.maxUploads = 1;
}
// An array of objects, each containing two items, a file and a reference
// to the button which triggered the upload: { file: uploadFile, btn: button }
this._queue = [];
this._active = 0;
this._disabled = false; // if disabled, clicking on button won't do anything
this._maxFails = 10; // max allowed failed progress updates requests in iframe mode
this._progKeys = {}; // contains the currently active upload ID progress keys
if ( !XhrOk ) {
// Cache progress keys after we set sizeBox for fewer trips to the DOM
this._sizeFlags = {};
}
if ( XhrOk && this._opts.dropzone !== '' ) {
this._dzone = ss.verifyElem( this._opts.dropzone );
if ( !this._dzone ) {
this.log( 'Invalid or nonexistent element passed for drop zone' );
} else {
this.addDropZone( this._dzone );
}
}
this._createInput();
this._manDisabled = false;
this.enable( true );
};
ss.SimpleUpload.prototype = {
_killInput: function() {
"use strict";
if ( !this._input ) {
return;
}
if ( this._input.turnOff ) {
this._input.turnOff();
}
if ( this._input.focusOff ) {
this._input.focusOff();
}
if ( this._input.blurOff ) {
this._input.blurOff();
}
if ( this._input.parentNode.mouseOverOff ) {
this._input.parentNode.mouseOverOff();
}
ss.remove( this._input.parentNode );
delete this._input;
this._input = null;
},
destroy: function() {
"use strict";
// # of upload buttons
var i = this._btns.length;
// Put upload buttons back to the way we found them
while ( i-- ) {
// Remove event listener
if ( this._btns[i].off ) {
this._btns[i].off();
}
// Remove any lingering classes
ss.removeClass( this._btns[i], this._opts.hoverClass );
ss.removeClass( this._btns[i], this._opts.focusClass );
ss.removeClass( this._btns[i], this._opts.disabledClass );
// In case we disabled it
this._btns[i].disabled = false;
}
this._killInput();
// Now burn it all down
for ( var prop in this ) {
if ( this.hasOwnProperty( prop ) ) {
delete this.prop;
}
}
},
/**
* Send data to browser console if debug is set to true
*/
log: function( str ) {
"use strict";
if ( this._opts.debug && window.console && window.console.log ) {
window.console.log( '[Uploader] ' + str );
}
},
/**
* Replaces user data
* Note that all previously set data is entirely removed and replaced
*/
setData: function( data ) {
"use strict";
this._opts.data = data;
},
/**
* Set or change uploader options
* @param {Object} options
*/
setOptions: function( options ) {
"use strict";
ss.extendObj( this._opts, options );
},
/**
* Designate an element as a progress bar
* The CSS width % of the element will be updated as the upload progresses
*/
setProgressBar: function( elem ) {
"use strict";
this._progBar = ss.verifyElem( elem );
},
/**
* Designate an element to receive a string containing progress % during upload
* Note: Uses innerHTML, so any existing child elements will be wiped out
*/
setPctBox: function( elem ) {
"use strict";
this._pctBox = ss.verifyElem( elem );
},
/**
* Designate an element to receive a string containing file size at start of upload
* Note: Uses innerHTML, so any existing child elements will be wiped out
*/
setFileSizeBox: function( elem ) {
"use strict";
this._sizeBox = ss.verifyElem( elem );
},
/**
* Designate an element to be removed from DOM when upload is completed
* Useful for removing progress bar, file size, etc. after upload
*/
setProgressContainer: function( elem ) {
"use strict";
this._progBox = ss.verifyElem( elem );
},
/**
* Designate an element to serve as the upload abort button
*/
setAbortBtn: function( elem, remove ) {
"use strict";
this._abortBtn = ss.verifyElem( elem );
this._removeAbort = false;
if ( remove ) {
this._removeAbort = true;
}
},
/**
* Returns number of files currently in queue
*/
getQueueSize: function() {
"use strict";
return this._queue.length;
},
/**
* Enables uploader and submits next file for upload
*/
_cycleQueue: function() {
"use strict";
if ( this._queue.length > 0 && this._opts.autoSubmit ) {
this.submit();
}
},
/**
* Remove current file from upload queue, reset props, cycle to next upload
*/
removeCurrent: function( id ) {
"use strict";
if ( id ) {
var i = this._queue.length;
while ( i-- ) {
if ( this._queue[i].id === id ) {
this._queue.splice( i, 1 );
break;
}
}
} else {
this._queue.splice( 0, 1 );
}
this._cycleQueue();
},
/**
* Clears Queue so only most recent select file is uploaded
*/
clearQueue: function() {
"use strict";
this._queue.length = 0;
},
/**
* Disables upload functionality
*/
disable: function( _self ) {
"use strict";
var i = this._btns.length,
nodeName;
// _self is always true when disable() is called internally
this._manDisabled = !_self || this._manDisabled === true ? true : false;
this._disabled = true;
while ( i-- ) {
nodeName = this._btns[i].nodeName.toUpperCase();
if ( nodeName == 'INPUT' || nodeName == 'BUTTON' ) {
this._btns[i].disabled = true;
}
if ( this._opts.disabledClass !== '' ) {
ss.addClass( this._btns[i], this._opts.disabledClass );
}
}
// Hide file input
if ( this._input && this._input.parentNode ) {
this._input.parentNode.style.visibility = 'hidden';
}
},
/**
* Enables upload functionality
*/
enable: function( _self ) {
"use strict";
// _self will always be true when enable() is called internally
if ( !_self ) {
this._manDisabled = false;
}
// Don't enable uploader if it was manually disabled
if ( this._manDisabled === true ) {
return;
}
var i = this._btns.length;
this._disabled = false;
while ( i-- ) {
ss.removeClass( this._btns[i], this._opts.disabledClass );
this._btns[i].disabled = false;
}
},
/**
* Updates invisible button position
*/
updatePosition: function() {
"use strict";
if ( this._btns[0] && this._input && this._input.parentNode ) {
this._overBtn = this._btns[0];
ss.copyLayout( this._btns[0], this._input.parentNode );
}
}
};
ss.IframeUpload = {
/**
* Accepts a URI string and returns the hostname
*/
_getHost: function( uri ) {
var a = document.createElement( 'a' );
a.href = uri;
if ( a.hostname ) {
return a.hostname.toLowerCase();
}
return uri;
},
_addFiles: function( file ) {
var filename = ss.getFilename( file.value ),
ext = ss.getExt( filename );
if ( false === this._opts.onChange.call( this, filename, ext, this._overBtn ) ) {
return false;
}
this._queue.push({
id: ss.getUID(),
file: file,
name: filename,
ext: ext,
btn: this._overBtn,
size: null
});
return true;
},
/**
* Handles uploading with iFrame
*/
_uploadIframe: function( fileObj, progBox, sizeBox, progBar, pctBox, abortBtn, removeAbort ) {
"use strict";
var self = this,
opts = this._opts,
key = ss.getUID(),
iframe = ss.getIFrame(),
form,
url,
msgLoaded = false,
iframeLoaded = false,
removeMessageListener,
removeLoadListener,
cancel;
if ( opts.noParams === true ) {
url = opts.url;
} else {
// If we're using Nginx Upload Progress Module, append upload key to the URL
// Also, preserve query string if there is one
url = !opts.nginxProgressUrl ?
opts.url :
url + ( ( url.indexOf( '?' ) > -1 ) ? '&' : '?' ) +
encodeURIComponent( opts.nginxProgressHeader ) +
'=' + encodeURIComponent( key );
}
form = ss.getForm({
action: url,
target: iframe.name,
method: opts.method
});
// Begin progress bars at 0%
opts.onProgress.call( this, 0 );
if ( pctBox ) {
pctBox.innerHTML = '0%';
}
if ( progBar ) {
progBar.style.width = '0%';
}
// For CORS, add a listener for the "message" event, which will be
// triggered by the Javascript snippet in the server response
if ( opts.cors ) {
removeMessageListener = ss.addEvent( window, 'message', function( event ) {
// Make sure event.origin matches the upload URL
if ( self._getHost( event.origin ) != self._getHost( opts.url ) ) {
self.log('Non-matching origin: ' + event.origin);
return;
}
// Set message event success flag to true
msgLoaded = true;
// Remove listener for message event
removeMessageListener();
opts.endNonXHR.call( self, fileObj.name, fileObj.btn );
self._finish( fileObj, '', '', event.data, sizeBox, progBox, pctBox, abortBtn, removeAbort );
});
}
var remove = ss.addEvent( iframe, 'load', function() {
remove();
if ( opts.sessionProgressUrl ) {
form.appendChild( ss.getHidden( opts.sessionProgressName, key ) );
}
// PHP APC upload progress key field must come before the file field
else if ( opts.progressUrl ) {
form.appendChild( ss.getHidden( opts.keyParamName, key ) );
}
// We get any additional data here after startNonXHR()
// in case the data was changed with setData() prior to submitting
for ( var prop in opts.data ) {
if ( opts.data.hasOwnProperty( prop ) ) {
form.appendChild( ss.getHidden( prop, opts.data[prop] ) );
}
}
// Add a field (default name: "XHR_CORS_TRARGETORIGIN") to tell server this is a CORS request
// Value of the field is targetOrigin parameter of postMessage(message, targetOrigin)
if ( opts.cors ) {