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<?php
if ( $_SERVER['REQUEST_METHOD'] != 'POST'){
header($_SERVER['SERVER_PROTOCOL'] . " 301 Moved Permanently");
header("Location: http://". $_SERVER["HTTP_HOST"] . "/");
exit;
}
require 'functions.php';
if ( empty($_POST["url"]) || $_POST["url"] == "" ){
failure("<p>We need a link to be shortened.</p>", false, "400 Client Failed", "<h1>Missing URL</h1>");
}
if ( ! preg_match("/^[a-z]+:\/\/[a-z0-9_]+/i", $_POST["url"]) ){
failure("<p>Only schemas like http:// or ftp:// are supported.</p>", false, "400 Client Failed", "<h1>This does not look like an url</h1>");
}
require 'db.php';
$hash = md5($_POST["url"]);
if( ! $short = $db->get($hash)){
$arr = array("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
$short="";
for ($i=0;$i<5;$i++){
$r = mt_rand(0, count($arr)-1);
$short.=$arr[$r];
}
$db->set($short, $_POST["url"]);
$db->set($hash, $short);;
}
failure("<p>Your short link for <a href=\"".htmlentities($_POST["url"])."\">".htmlentities($_POST["url"])."</a> is <br> <a href=\"http://".$_SERVER["HTTP_HOST"] . "/-" . $short ."\">http://".$_SERVER["HTTP_HOST"]."/-".$short."</a></p>", false, "200 OK", "<h1>Success</h1>");
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