Gravatar Proxy

gravatar-proxy.php

<?php
if(!isset($_GET['mail'])){
	$email = "StaticTest@StaticExample.mail";
	$email = md5(strtolower(trim($email))); //get mail md5 Hash for Gravatar
}
else{
	$email = strtolower(trim($_GET['mail'])); //not really safe
	$_GET['mail'] = null;
}
$opts = $_GET; // even this is really really insecure

header('Content-type: image/jpeg');
echo curl_get("http://www.gravatar.com/avatar/".$email.'.jpg',$opts);//get image and ensure it ist an jpeg


/**
* Send a GET requst using cURL
* Taken from: http://php.net/manual/de/function.curl-exec.php#98628
* @param string $url to request
* @param array $get values to send
* @param array $options for cURL
* @return string
*/
function curl_get($url, array $get = NULL, array $options = array())
{   
    $defaults = array(
        CURLOPT_URL => $url. (strpos($url, '?') === FALSE ? '?' : ''). http_build_query($get),
        CURLOPT_HEADER => 0,
        CURLOPT_RETURNTRANSFER => TRUE,
        CURLOPT_TIMEOUT => 4
    );
    $ch = curl_init();
    curl_setopt_array($ch, ($options + $defaults));
    if( ! $result = curl_exec($ch))
    {
        trigger_error(curl_error($ch));
    }
    curl_close($ch);
    return $result;
} 

NOTE

A very basic gravatar privacy proxy

This is only very basic!!!

TODO:
- Cache
- GET validation

Install
- Put the script in the webserver directory
- Ensure that the php cURL is installed (php5-curl)

Usage
- Send a get request to the script and supply the mail hash with the "mail" parameter you can also apply all gravatar parameters