Ajax Upload; A file upload script with progress-bar, drag-and-drop

An older ajax upload plugin, which only used iframe for uploads, and was licensed under MIT license is located on
github.
This plugin uses XHR for uploading multiple files with progress-bar in FF3.6+, Safari4+, Chrome and falls back to hidden iframe based upload in other browsers, providing good user experience everywhere.

Demo

To upload a file, click on the button below. Drag-and-drop is supported in FF, Chrome. Progress-bar is supported in FF3.6+, Chrome6+, Safari4+

Drop files here to upload

Upload a file

Download
Donate GitHub repo

Features

multiple file select, progress-bar in FF, Chrome, Safari
drag-and-drop file select in FF, Chrome
uploads are cancellable
no external dependencies
doesn't use Flash
fully working with https
keyboard support in FF, Chrome, Safari
tested in IE7,8; Firefox 3,3.6,4; Safari4,5; Chrome; Opera10.60;

License

This plugin is open sourced under
GNU GPL and GNU LGPL 2 or later. If these licenses don't suit you, mail me at andrew (at) valums.com.

Please
donate if you are willing to support the further development of file upload plugin.

Known Issues

Plugin breaks back button functionality in Opera.

Getting started

The fileuploader.js contains two classes that are meant to be used directly. If you need a complete upload widget (from demo) to quickly drop into your current design, use qq.FileUploader.

If you want to customize uploader, by using a different looking file list or change the behaviour or functionality use qq.FileUploaderBasic.

The difference between them is that qq.FileUploader provides a list of files, drag-and-drop, but qq.FileUploaderBasic only creates button and handles validation. Basic uploader is easier extendable, and doesn't limit possible customization.

qq.FileUploader extends qq.FileUploaderBasic, so that all the options present in the basic uploader also exist in the full widget.

qq.FileUploader - Setting up full upload widget

Include fileuploader.js and fileuploader.css into your page. Create container element.

<div id="file-uploader">
<noscript>
<p>Please enable JavaScript to use file uploader.</p>
<!-- or put a simple form for upload here -->
</noscript>
</div>

Initialize uploader when the DOM is ready. Change the action option. For example ../server/php.php for the default folder structure. In the server folder you will find examples for different platforms. If you can't find the one you need, check the readme.txt
in the same folder.

var uploader = new qq.FileUploader({
// pass the dom node (ex. $(selector)[0] for jQuery users)
element: document.getElementById('file-uploader'),
// path to server-side upload script
action: '/server/upload'
});

Options of both classes

// url of the server-side upload script, should be on the same domain
action: '/server/upload',
// additional data to send, name-value pairs
params: {},

// validation
// ex. ['jpg', 'jpeg', 'png', 'gif'] or []
allowedExtensions: [],
// each file size limit in bytes
// this option isn't supported in all browsers
sizeLimit: 0, // max size
minSizeLimit: 0, // min size

// set to true to output server response to console
debug: false,

// events
// you can return false to abort submit
onSubmit: function(id, fileName){},
onProgress: function(id, fileName, loaded, total){},
onComplete: function(id, fileName, responseJSON){},
onCancel: function(id, fileName){},

messages: {
// error messages, see qq.FileUploaderBasic for content
},
showMessage: function(message){ alert(message); }

Instance methods

setParams(newParams)

Changing alert/messages to something more user friendly

If you limited file types and max size, you will probably want to change the default alert and messages as you see fit, this is possible using showMessage callback and messages option.

Sending additional params

To add a parameter that will be passed as a query string with each upload use params option.

var uploader = new qq.FileUploader({
element: document.getElementById('file-uploader'),
action: '/server-side.upload',
// additional data to send, name-value pairs
params: {
param1: 'value1',
param2: 'value2'
}
});

To change params based on the state of your app, use

uploader.setParams({
anotherParam: 'value'
});

It can be nicely used in onSubmit callback.

Troubleshooting

If you can't get the uploader to work, please try the following steps before asking for help.

If the upload doesn't complete, saying failed.

Set the debug option of the FileUploader to true.
Open the page where you have a FileUploader.
Open developer console in your browser.
Try to upload the file. You should see a server serponse.

It should be {success:true} for completed requests. If it's not, then you have a problem with your server-side script.

Contributors

Thanks to everybody who contributed, either by sending bug reports or donating. And special thanks to:

John Yeary

Sidney Maestre

Patrick Pfeiffer

Sean Sandy (SeanJA)

Andy Newby

Ivan Valles