Image loads on page if direct request, as image otherwise... HOW???

gordonrp

Hey guys I stumbled across this:

http://www.zone.ee/soldieroffortune2/rpg.jpg

Now if you click on that link, it opens the image in a page, but if you embed the image then it works also..

How is this done??? It would be great for my image hosting site. www.free-image-hosting.org

Antistatic

That is not done with php. It is either a Apache module or something similar. I've never used anything like it but there is hotlinking software/modules out there that will do this.

gordonrp

ah cool, i was thinking maybe i could do it in php somehow, probably not tho. I understand I will need to edit my apache to proecess .jpgs differently.

Maybe this could be moved to the lounge then if its not php..

anyone know how to do this in apache then (have own server).

thx
gp

khaine

This can be done in PHP just with your browsers help.

If you output the header values as

Header("Content-type: image/jpeg");

Then you can output an image straight out of a script straight to the browser. The browser recognises the file type as an image and displays it accordingly. You can also use a standard html img tag to output the image.

You will however have to have the gd image functions compliled into php

Then you can do things like

<?php 
   header("Content-type: image/png"); 
   $string = $_GET['text']; 
   $im     = imagecreatefrompng("images/button1.png"); 
   $orange = imagecolorallocate($im, 220, 210, 60); 
   $px     = (imagesx($im) - 7.5 * strlen($string)) / 2; 
   imagestring($im, 3, $px, 9, $string, $orange); 
   imagepng($im); 
   imagedestroy($im); 
?>

drew010

i did this in a .htaccess file a minute ago. i havent tested every case but it seems to work with no referer or any referer.

RewriteEngine On

RewriteCond %{HTTP_REFERER} !^..(jpg|gif) [NC]
#RewriteCond %{HTTP_REFERER} !^..(html|php) [NC]
RewriteCond %{REQUEST_URI} !^{..(html|php).} [NC]
RewriteRule .*.(jpg|gif|JPG|GIF)$ http://www.yoursite.com/image.php?%{REQUEST_URI} [L]

//image.php
<html code here>
<img src="<?php echo $_SERVER['QUERY_STRING']; ?>">
<more html code here>

gordonrp

that will still allow someone to embed the image, but if they just want to open image in browser.. then it will open in that php page, right?

drew010

that would cause a broken link if they hotlink it, but i just realized if you use img src on it yourself, on your own server it will still cause it to be broken. it could use some work on checking referers.

gordonrp

Khaine,

I did what you said

http://free-image-hosting.org/test.php

and it shows the button1.png image from the images sub directory...

the problem is, i have thousands of people uploading images, so i cant write each one like that.

Anyone know how I can make an embedded image run a piece of php code? i.e. so i can keep track of how many times an image has been embeded (and after it is viewed 10 times, whack a watermark on it?)

any help would be very much appreciated..

drew010

just put any type of logging code you want before or after your gd code to generate the image. as long as it doesnt output anything to the browser it should be fine.

gordonrp

Ok, but how am i going to do that dynamically? I dont see how that would work.

the idea is for www.free-image-hosting.org

I think i need to do something with apache, to make it run a php script each time an image is called, can i do that?