Question

I am uploading files using jQuery uploadify plugin. All files are uploaded into same directory. When I try to upload a file twice, it give me following error.

filename.gif (4.3KB) - IO Error

I want to upload a file with unique name every time. There are many other users uploading files in same directory. So there is a chance that two users share same file name. How can I avoid overwritten.

My Code:

$('.SingleFileUpload').uploadify({
        'uploader'  : '/uploadify/uploadify.swf',
        'script'    : '/uploadify/uploadify.php',
        'cancelImg' : '/uploadify/cancel.png',
        'folder'    : '/uploads',
        'auto'      : true,
        'queueID'   : 'fileQueue',
        'removeCompleted':false,
        'onComplete'  : function(event, ID, fileObj, response, data) {
                            $(event.target).closest('form').append( '<input type="hidden" name="uploaded_file" value="' + response + '">' );
                        }
      });

Answer 1

I don’t think using javascript is good or safe for this, one method I use is to name each file by calculate its SHA1 on server side.