Weird Happenings

[Joshua F]

My problem is if you access the file with the code below directly it will add 2 to `hits` in the table, but if you use image tags and it is displayed on a webpage it does what it should do, which is just add 1 to `hits`. I can not figure out the reason why. I am using a custom database class which uses PDO.

 

<?php
if (is_file("./imgs/{$_GET['image']}.png")) {
$file = "./imgs/{$_GET['image']}.png";
} else {
header( "HTTP/1.0 404 File not found" );
require_once '../errors/404.error';
exit;
}

require_once '../classes/Database.php';
$db = new Database(array("host" => "127.0.0.1", "user" => "root", "pass" => "", "name" => "test"));

$filesize = filesize($file);
$filetype = getimagesize($file);
$filetype = $filetype['mime'];

$db->query("INSERT INTO `snaps` (`image_id`, hits, `first_view`) VALUES (?, 1, ?) ON DUPLICATE KEY UPDATE `hits` = hits+1;")->bind(1, $_GET['image'])->bind(2, time())->execute();

header('Content-Type: ' . $filetype);
header('Content-Length: ' . $filesize);
readfile($file);

[kicken]

When you load an image directly, some browsers may end up making the request twice for various reasons.  For instance firefox will request it twice under certain conditions to use the image as an icon for the window on the task bar.

 

edit: https://bugzilla.mozilla.org/show_bug.cgi?id=583351 - The firefox bug

Edited December 22, 2012 by kicken

[Joshua F]

That makes a lot of sence, actually. Would there possibly be a way to detect something like that?