Upload a file to Google Drive using their SDK and HTML5

drive.js

var bb, reader;

var meta = {
	"title": "mozilla.png",
	"mimeType": "image/png",
	"description": "Mozilla Official logo"
};

var xhr = new XMLHttpRequest();
xhr.open('GET', 'https://developer.mozilla.org/media/img/mdn-logo-sm.png', true);
xhr.responseType = 'arraybuffer';

xhr.onload = function(e){
	if(this.status == 200){
		bb = new WebKitBlobBuilder();
		bb.append(this.response);
		console.log('Download OK');

		reader = new FileReader();
		reader.readAsDataURL(bb.getBlob('image/png'));
		reader.onloadend = function(e){
			console.log('Reader OK');

			var bound = 287032396531387;

			var parts = [];
			parts.push('--' + bound);
			parts.push('Content-Type: application/json');
			parts.push('');
			parts.push(JSON.stringify(meta));
			parts.push('--' + bound);
			parts.push('Content-Type: image/png');
			parts.push('Content-Transfer-Encoding: base64');
			parts.push('');
			parts.push(reader.result);
			parts.push('--' + bound + '--');

			var xhr = new XMLHttpRequest();
			xhr.open("POST", "https://www.googleapis.com/upload/drive/v2/files?uploadType=multipart", true);
			xhr.setRequestHeader("Authorization", "Bearer token123456");
			xhr.setRequestHeader("Content-Type", "multipart/mixed; boundary=" + bound);


			xhr.onload = function(e){
				console.log("DRIVE OK", this, e);
			};

			xhr.send(parts.join("\r\n"));
		}
	}
};

xhr.send();