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Thread: JavaScript: file uploader progress bars

  1. #1
    Join Date
    Aug 2011
    Posts
    3

    JavaScript: file uploader progress bars

    Hi, I am trying to make a script that will upload files and show a progress bar and I've come so far that I can upload the file but the progress bar that appear for each file will not grow with green goo, you know?

    Please help!

    This is a drop box version:
    Code:
    window.onload = function()
    {
    	var dropzone = document.getElementById("dropArea");
    	dropzone.ondragover = dropzone.ondragenter = function(event)
    	{
    		event.stopPropagation();
    		event.preventDefault();
    	}
    
    	dropzone.ondrop = function(event)
    	{
    		event.stopPropagation();
    		event.preventDefault();
    
    		var filesArray = event.dataTransfer.files;
    		for (i=0; i<filesArray.length; i++)
    		{
    			var progressDiv = document.getElementById('progressDiv');
    			var pbar = document.createElement('progress');
    			var br = document.createElement('br');
    			var report = document.createElement('div');
    			
    			pbar.setAttribute('id', 'progressBar' + i);
    			pbar.setAttribute('value', '0');
    			pbar.setAttribute('max', '100');
    			report.setAttribute('id', 'report' + i)
    			
    			progressDiv.appendChild(pbar);
    			progressDiv.appendChild(br);
    			progressDiv.appendChild(report);
    			progressDiv.appendChild(br);
    			
    			sendFile(filesArray[i]);
    		}
    	}
    }
    
    
    function sendFile(file)
    {
    	var uri = "upload.php";
    	var xhr = new XMLHttpRequest();
    	var fd = new FormData();
    
    	xhr.upload.addEventListener("progress", progressFunction, false);
    	
    	xhr.open("POST", uri, true);
    	xhr.onreadystatechange = function()
    	{
    		if (xhr.readyState == 4 && xhr.status == 200)
    		{
    			// Handle response.
    			//alert(xhr.responseText);
    			var percentageDiv = document.getElementById("report");
    			percentageDiv.innerHTML = 'Transfer complete';
    		}
    	}
    	fd.append('myFile', file);
    	// Initiate a multipart/form-data upload
    	xhr.send(fd);
    }
    
    
    function progressFunction(evt)
    {
    	var progressBar = document.getElementById('progressBar');
    	var percentageDiv = document.getElementById('report');
    	while(evt.lengthComputable)
    	{
    		progressBar.max = evt.total;
    		progressBar.value = evt.loaded;
    		percentageDiv.innerHTML = Math.round(evt.loaded / evt.total * 100) + "%";
    	}
    }

  2. #2
    Join Date
    Aug 2011
    Posts
    3
    are you asking me for something?

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