Direct link access but tracking by mysql/php? - php

Question

I have a direct link to a file I want to give out to my visitors, for example:
http://www.mydomain.com/mynewmix.mp3
Is there any way I can run the following query when the link above is being ping/hit/downloaded?
UPDATE `db` SET `downloaded`=`downloaded`+1 WHERE `url`='http://www.mydomain.com/mynewmix.mp3'
Any kind of help I can get on this is greatly appreciated. Thank you so much in advance.

Answer 1

Yes this is possible. you can use rewrite module in apache. so you can say that for all (mp3) files the server shouldn't return the mp3 file but instead run a php file/script which executes your query and returns the mp3 file.
this might help you: http://www.workingwith.me.uk/articles/scripting/mod_rewrite
in your .htaccess file:
RewriteEngine on
RewriteRule ^\.mp3$ index.php [L]
this will send all links ending with .mp3 to index.php (actualy it will still be the same link but the index.php will be executed)
other option you have:
RewriteRule ^.*/(\w)*\.mp3$ index.php?filename=$1 [L]
this will execute index.php with the GET veriable filename with the filename
eg. $_GET['filename'] = "filename" (when file: filename.mp3)
in index.php to let the user download the mp3 file (see: Can I serve MP3 files with PHP?):
header("Content-Transfer-Encoding: binary");
header("Content-Type: audio/mpeg, audio/x-mpeg, audio/x-mpeg-3, audio/mpeg3");
header('Content-length: ' . filesize("[file location eg: /home/files/sometrack.mp3]"));
header('Content-Disposition: attachment; filename="sometrack.mp3"');
header('X-Pad: avoid browser bug');
header('Cache-Control: no-cache');
readfile("[file location eg: /home/files/sometrack.mp3]");
exit();
you could do this dynamicly with the following code:
$fileName = $_GET['filename']."mp3"; //we stripped .mp3 in the apache rewrite (might not be so smart)
$fileLocation = "/your/location/".$filename;
header("Content-Transfer-Encoding: binary");
header("Content-Type: audio/mpeg, audio/x-mpeg, audio/x-mpeg-3, audio/mpeg3");
header('Content-length: ' . filesize($fileLocation));
header('Content-Disposition: attachment; filename="'.$fileName.'"');
header('X-Pad: avoid browser bug');
header('Cache-Control: no-cache');
readfile($fileLocation);
exit();
you can access the requested link with:
$_SERVER['REQUEST_URI'];
or the new (generated url with):
$_SERVER['REDIRECT_URL'];

Answer 2

I think there is another way that does what you want:
Create a new php file "download" to start download with parameters
Contents look like this (date and time are keys to get my mp3-file):
<?php
if (isset($_GET['date']) && is_string($_GET['date']) && isset($_GET['time']) && is_string($_GET['time']))
{
require_once($_SERVER['DOCUMENT_ROOT'] . "/bin/functions.php");
DownloadFile($_GET['date'],$_GET['time']);
}
?>
Create a different php file "functions.php" with the function "DownloadFile":
function DownloadFile($Date,$Time)
{
require('connection.php');
mysql_select_db($database, $instance);
$qry = "
UPDATE `table`
SET `Field1` = `Field1` + 1
WHERE `Field2` = '$Date' AND `Field3` = '$Time'
";
$result = mysql_query($qry, $instance) or die(mysql_error());
header('Content-type: Application/mp3');
header("Content-Length: " .(string)(filesize($file)));
header('Content-Disposition: attachment; filename=' . $file);
readfile($file);
}
Use different url for downloading (no anchor)
http://www.yoursite.com/xxx/download.php?date=2000-01-01&time=12:00:00

Answer 3

Yes you can do this. on click of url need to call ajax to run update query on success you proceed to download the file.