Emulate FormData object for browsers wich support FileAPI interface.

formdata.js doesn't overload original FormData object in browser like Safari 5.0+, Firefox 4.0+ or Chrome 6.0+.

FormData objects provide a way to easily construct a set of key/value pairs representing form fields and their values, which can then be easily sent using the XMLHttpRequest send() method.

developer.mozilla.org/en/XMLHttpRequest/FormData

Include formdata.js:

<script type="text/javascript" src="https://raw.githubusercontent.com/francois2metz/html5-formdata/master/formdata.js"></script>

And use xmlhttprequest with some bad adjustments.

var data = new FormData();
data.append('file', document.getElementById('file').files[0]);

xhr.open('POST', '/', true);
xhr.setRequestHeader("Cache-Control", "no-cache");
xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
// this is really bad
if (data.fake) {
   xhr.setRequestHeader("Content-Type", "multipart/form-data; boundary="+ data.boundary);
   xhr.sendAsBinary(data.toString());
} else {
   xhr.send(data);
}

jquery.form.js have been patched and can use fake FormData. See github.com/AF83/form.

Point your favorite web browser in tests.html.

MIT License

Copyright (c) 2010 François de Metz

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.