auth.php
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<?php
header("HTTP/1.0 307 Temporary redirect");
header('Content-type: text/plain; charset=UTF-8');
start_session();
if (isset($_GET['logout']))
{
header('Location: /');
unset($_SESSION['steamid']);
session_unset();
session_destroy();
print("We have now forgotten your SteamID.\n");
print("You'll have to log in to use this site again.\n\n");
exit(0);
} // if
if (isset($_SESSION['steamid']))
{
// Already logged in.
header('Location: /');
exit(0);
} // if
require_once('openid.php');
if (!isset($_GET['openid_mode']))
{
$url = 'http://steamcommunity.com/openid';
try
{
$openid = new LightOpenID;
$openid->identity = $url;
header('Location: ' . $openid->authUrl());
print("Redirecting you to Steam Community OpenID provider:\n");
print(" $url\n\n");
} // try
catch (ErrorException $e)
{
$msg = $e->getMessage();
print("OpenID library threw an exception:\n $msg\n\n");
header('Location: /');
} // catch
exit(0);
} // if
header('Location: /'); // always going here now.
if ($_GET['openid_mode'] == 'cancel')
print("User has canceled authentication!\n\n");
else
{
$okay = false;
try
{
$openid = new LightOpenID;
$okay = openid->validate();
} // try
catch (ErrorException $e)
{
$msg = $e->getMessage();
print("OpenID library threw an exception:\n $msg\n\n");
} // catch
$m = array();
if (!$okay)
print("User has not logged in!\n\n");
else if (!preg_match('/^.*\/(\d+)$/', $_GET['openid_identity'], $m))
print("User logged in, but we can't figure out SteamID!\n\n");
else
{
$steamid = $m[1];
$_SESSION['steamid'] = $steamid;
print("User logged in! SteamID is $steamid!\n\n");
} // else
} // else
exit(0);
?>