Check Valid extension of file at client side while uploding file ~ OneAoneJ

This following example allow to user upload only pdf file.for this example we need the jquery.js file.
<html>
<head>
<script src="jquery.js"></script>
<style>
body {
    margin:1em;
    font-size:.9em;
}
h1 {
    margin:1em 0;
    font-weight:bold;
}
h1:not(:first-of-type) {
    border-top:1px solid #ccc;
    padding:1em 0 0;
}
p {
    margin:1em 0;
}
p label {
    color:#333;
    font-family:sans-serif;
    display:inline-block;
    padding:.1em .1em .1em .3em;
    background:#f7f7f7;
    border:1px solid #ccc;
}
aside {
    margin-top:-.5em;
}
aside p {
    color:#333;
    font-size:.8em;
    font-family:sans-serif;
}

</style>
<script>
function getExtension(filename)
{

    var parts = filename.split('.');
    return parts[parts.length - 1];
}

function isPDF(filename)
{
    var ext = getExtension(filename);
    switch (ext.toLowerCase())
    {
    case 'pdf':

        /*
        etc
        like
        'xsl'
        */
        return true;
    }
    return false;
}

function failValidation(msg)
{
            alert(msg);
            return false;
}
function validate()
{
        var file = $('#file');

        if (!isPDF(file.val()))
        {
            return failValidation('Please select a valid file');
        }

        // indicate success with alert for now
        alert('Valid file');
        return true;
}

</script>
</head>
<body>

<form name="frmpdf" action="connect.jsp" onsubmit="return validate()">
<h1>Match all pdf files (application/pdf)</h1>
<p><label>Pdf File <input type="file" id="file" accept="application/pdf"></label></p>
<input type="submit" value="submit">
</form>
</body>
</html>

for checking image you can write following function.

function isImage(filename)

 {
    var ext = getExtension(filename);
    switch (ext.toLowerCase())

   {
    case 'jpg':
    case 'gif':
    case 'bmp':
        //etc
        return true;
    }
    return false;
}

Wednesday, August 21, 2013

Check Valid extension of file at client side while uploding file