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Added support for X-Forwarded-For-header #109

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Added support for X-Forwarded-For-header #109

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19 changes: 17 additions & 2 deletions index.php
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,21 @@ function stripslashes_deep($value) { $value = is_array($value) ? array_map('stri
$_COOKIE = array_map('stripslashes_deep', $_COOKIE);
}

// get_real_ip : Support for proxies that will put the real IP into the HTTP_X_FORWARDED_FOR-header.
function get_real_ip()
{
$useproxyip = false;
// uncomment the following line if you want to use the X-Forwarded-For-header. Beware that this header can be spoofed. Leave commented out on systems without reverse proxy in front of the webserver.
//if ( isset($_SERVER['HTTP_X_FORWARDED_FOR']) ) $useproxyip = true;

if ( $useproxyip ) {
$ip_arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'], 2);
return trim($ip_arr[0]);
} else {
return $_SERVER['REMOTE_ADDR'];
}
}

// trafic_limiter : Make sure the IP address makes at most 1 request every 10 seconds.
// Will return false if IP address made a call less than 10 seconds ago.
function trafic_limiter_canPass($ip)
Expand Down Expand Up @@ -157,7 +172,7 @@ function deletePaste($pasteid)
}

// Make sure last paste from the IP address was more than 10 seconds ago.
if (!trafic_limiter_canPass($_SERVER['REMOTE_ADDR']))
if (!trafic_limiter_canPass(get_real_ip()))
{ echo json_encode(array('status'=>1,'message'=>'Please wait 10 seconds between each post.')); exit; }

// Make sure content is not too big.
Expand Down Expand Up @@ -229,7 +244,7 @@ function deletePaste($pasteid)
// (We assume that if the user did not enter a nickname, he/she wants
// to be anonymous and we will not generate the vizhash.)
$vz = new vizhash16x16();
$pngdata = $vz->generate($_SERVER['REMOTE_ADDR']);
$pngdata = $vz->generate(get_real_ip());
if ($pngdata!='') $meta['vizhash'] = 'data:image/png;base64,'.base64_encode($pngdata);
// Once the avatar is generated, we do not keep the IP address, nor its hash.
}
Expand Down