jafstar · August 19, 2012 15:44
diff --git a/adobe.html b/adobe.html
 <html>
    <head>
        <script>
        
            var request;
            var progressBar;

            function loadImage(imageURI)
            {
                request = new XMLHttpRequest();
                request.onloadstart = showProgressBar;
                request.onprogress = updateProgressBar;
                request.onload = showImage;
                request.onloadend = hideProgressBar;
                request.open("GET", imageURI, true);
                request.overrideMimeType('text/plain; charset=x-user-defined'); 
                request.send(null);
            }
            
            function showProgressBar()
            {
                progressBar = document.createElement("progress");
                progressBar.value = 0;
                progressBar.max = 100;
                progressBar.removeAttribute("value");
                document.body.appendChild(progressBar);
            }
            
            function updateProgressBar(e)
            {
                if (e.lengthComputable)
                    progressBar.value = e.loaded / e.total * 100;
                else
                    progressBar.removeAttribute("value");
            }
            
            function showImage()
            {
                var imageElement = document.createElement("img");
                imageElement.src = "data:image/jpeg;base64," + base64Encode(request.responseText);
                document.body.appendChild(imageElement);
            }
            
            function hideProgressBar()
            {
                document.body.removeChild(progressBar);
            }

            // This encoding function is from Philippe Tenenhaus's example at http://www.philten.com/us-xmlhttprequest-image/
            function base64Encode(inputStr) 
            {
               var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
               var outputStr = "";
               var i = 0;
               
               while (i < inputStr.length)
               {
                   //all three "& 0xff" added below are there to fix a known bug 
                   //with bytes returned by xhr.responseText
                   var byte1 = inputStr.charCodeAt(i++) & 0xff;
                   var byte2 = inputStr.charCodeAt(i++) & 0xff;
                   var byte3 = inputStr.charCodeAt(i++) & 0xff;
            
                   var enc1 = byte1 >> 2;
                   var enc2 = ((byte1 & 3) << 4) | (byte2 >> 4);
                   
                   var enc3, enc4;
                   if (isNaN(byte2))
                   {
                       enc3 = enc4 = 64;
                   }
                   else
                   {
                       enc3 = ((byte2 & 15) << 2) | (byte3 >> 6);
                       if (isNaN(byte3))
                       {
                           enc4 = 64;
                       }
                       else
                       {
                           enc4 = byte3 & 63;
                       }
                   }
            
                   outputStr += b64.charAt(enc1) + b64.charAt(enc2) + b64.charAt(enc3) + b64.charAt(enc4);
                } 
               
                return outputStr;
            }
            
        </script>
    </head>
    <body onload="loadImage('sample.jpg')">

 <!-- http://blogs.adobe.com/webplatform/2012/01/13/html5-image-progress-events/ -->

    </body>


 </html>
	<html>
	<head>
	<script>

	var request;
	var progressBar;

	function loadImage(imageURI)
	{
	request = new XMLHttpRequest();
	request.onloadstart = showProgressBar;
	request.onprogress = updateProgressBar;
	request.onload = showImage;
	request.onloadend = hideProgressBar;
	request.open("GET", imageURI, true);
	request.overrideMimeType('text/plain; charset=x-user-defined');
	request.send(null);
	}

	function showProgressBar()
	{
	progressBar = document.createElement("progress");
	progressBar.value = 0;
	progressBar.max = 100;
	progressBar.removeAttribute("value");
	document.body.appendChild(progressBar);
	}

	function updateProgressBar(e)
	{
	if (e.lengthComputable)
	progressBar.value = e.loaded / e.total * 100;
	else
	progressBar.removeAttribute("value");
	}

	function showImage()
	{
	var imageElement = document.createElement("img");
	imageElement.src = "data:image/jpeg;base64," + base64Encode(request.responseText);
	document.body.appendChild(imageElement);
	}

	function hideProgressBar()
	{
	document.body.removeChild(progressBar);
	}

	// This encoding function is from Philippe Tenenhaus's example at http://www.philten.com/us-xmlhttprequest-image/
	function base64Encode(inputStr)
	{
	var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
	var outputStr = "";
	var i = 0;

	while (i < inputStr.length)
	{
	//all three "& 0xff" added below are there to fix a known bug
	//with bytes returned by xhr.responseText
	var byte1 = inputStr.charCodeAt(i++) & 0xff;
	var byte2 = inputStr.charCodeAt(i++) & 0xff;
	var byte3 = inputStr.charCodeAt(i++) & 0xff;

	var enc1 = byte1 >> 2;
	var enc2 = ((byte1 & 3) << 4) \| (byte2 >> 4);

	var enc3, enc4;
	if (isNaN(byte2))
	{
	enc3 = enc4 = 64;
	}
	else
	{
	enc3 = ((byte2 & 15) << 2) \| (byte3 >> 6);
	if (isNaN(byte3))
	{
	enc4 = 64;
	}
	else
	{
	enc4 = byte3 & 63;
	}
	}

	outputStr += b64.charAt(enc1) + b64.charAt(enc2) + b64.charAt(enc3) + b64.charAt(enc4);
	}

	return outputStr;
	}

	</script>
	</head>
	<body onload="loadImage('sample.jpg')">

	<!-- http://blogs.adobe.com/webplatform/2012/01/13/html5-image-progress-events/ -->

	</body>


	</html>