Call Ajax, JavaScript, J query in download button

Question

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My Script:

JavaScript

<script>
           
            var myTrigger;
            var progressElem = $('#progress');
            $.ajax({
                type: 'GET',
                url: 'download.php',
                
                beforeSend: function(thisXHR)
                {
                    myTrigger = setInterval(function()
                    {
                        if (thisXHR.readyState > 2)
                        {
                            var totalBytes = thisXHR.getResponseHeader('Content-length');
                            var dlBytes = thisXHR.responseText.length;
                            (totalBytes > 0) ? progressElem.html(Math.round((dlBytes / totalBytes) * 100) + "%") : progressElem.html(Math.round(dlBytes / 1024) + "K");
                        }
                    }, 200);
                },
                complete: function()
                {
                    clearInterval(myTrigger);
                },
                success: function(response)
                {
                    // Process XML
                }
            });
                     
        </script>

My HTML:

HTML

<body>
        <form  enctype="multipart/form-data">
            <iframe style="display: none"></iframe>
            <div id="progress" style="width:500px;border:1px solid #ccc;"></div>
            <!-- Progress information -->
            <div id="information" style="width"></div>
            <input type="text" name="file">
            <button id="download" >Download</button>
     <!--<input type="file" name="file" id="file"><br>
     <input type="submit" name="submit" value="Submit">-->
        </form>

    </body>

My PHP:

PHP

<?php

if(empty($_POST['file'])){
	exit;
}

// Sanitizing the filename:
$filename = $_POST['file'];

// Outputting headers:
header("Cache-Control: ");
header("Content-type: application/octet-stream");
header("Content-Description: File Transfer");
header("Content-Transfer-Encoding: binary");
header("Content-Length: " . filesize($filename));
header('Content-Disposition: attachment; filename="'.$filename.'"');
  readfile($filename);



?>

I don't know how to call this JavaScript in my "download" button. And I don't know how to calculate total size of my file and how many bytes are downloaded in client pc.

It will helpful for me if you make my code as required it have to do.

Posted 8-Apr-13 3:33am

UL UL ALBAB

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Comments

Prasad Khandekar 8-Apr-13 10:11am

You can not use AJAX for download.

1 solution

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Mohibur Rashid · Answer 1 · 2013-04-08T05:07:00

let the browser handle its download issue. and use the below code:

HTML

<button id="download" onclick='window.location="download.php?file=filename"'>Download</button>

And from your download.php use $_GET method not $_POST.

you can also try POST method with ajax, but if I try to give you proper method then i will have to test it first. what you can do is(as test) create a div as hidden with some

on