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121 lines
3.4 KiB
PHP
121 lines
3.4 KiB
PHP
<?php
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function gen_base62_rand_shortlink($len) {
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$rand_bytes = random_bytes(intval(($len * 2) / 3));
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$rand_string = base64_encode($rand_bytes);
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$rand_string = str_replace("+","",$rand_string);
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$rand_string = str_replace("/","",$rand_string);
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$rand_string = str_replace("=","",$rand_string);
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if (mb_strlen($rand_string) < $len) {
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$curlen = mb_strlen($rand_string);
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$rand_string = $rand_string . gen_rand_shortlink($len - $curlen);
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}
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return $rand_string;
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}
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function gen_rand_shortlink($len) {
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$to_return = '';
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$possible_chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
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while (mb_strlen($to_return) < $len) {
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$to_return = $to_return . $possible_chars[rand(0, mb_strlen($possible_chars)-1)];
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}
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return $to_return;
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}
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ini_set('display_errors', 1);
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$cluster = Cassandra::cluster()->withPersistentSessions(true)->build();
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$keyspace = 'glink';
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$session = $cluster->connect($keyspace);
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$url = $_GET["url"];
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if (isset($_GET["restricted"])) {
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$is_geo = 1;
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} else {
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$is_geo = 0;
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}
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if ($is_geo == 1) {
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$radius = $_GET["radius"];
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$latitude = $_GET["latitude"];
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$latitude = doubleval($latitude);
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$longitude = $_GET["longitude"];
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$longitude = doubleval($longitude);
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}
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$matches = preg_match('/^http(s)*:\\/\\/[a-zA-Z0-9\\-]+(\\.[a-zA-Z0-9\\-]+)+$/',$url);
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if (($matches == 0) || ($matches == false)) {
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printf("The URL entered was invalid. Please try again.");
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return;
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}
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$shortlink = $_GET["glink"];
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if ($shortlink != '') {
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$matches_shortlink = preg_match('/^[a-zA-Z]+$/',$shortlink);
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if (($matches_shortlink == 0) || ($matches_shortlink == false)) {
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printf("The GLink entered was invalid. The GLink can only contain letters. Please try again.");
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return;
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}
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} else {
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/* generate a random shortlink */
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gen_shortlink:
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$rand_string = gen_rand_shortlink(6); /* the function is defined at the start of this file */
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$shortlink = $rand_string;
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/* Check if shortlink is already taken by querying the database */
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$statement = $session->prepare('SELECT url FROM data WHERE shortlink=? ALLOW FILTERING');
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$result = $session->execute($statement,array('arguments' => array($shortlink)));
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if ($result->count() != 0) {
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goto gen_shortlink;
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}
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}
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//$statement = new Cassandra\SimpleStatement('SELECT name FROM data WHERE id=5');
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$statement = $session->prepare('SELECT url FROM data WHERE shortlink=? ALLOW FILTERING');
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$options = array('arguments' => array($shortlink));
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$result = $session->execute($statement,$options);
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if ($result->count() != 0) {
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printf('That GLink is already taken. Please try another one.');
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exit;
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}
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$rand_num = rand(0,99999999);
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$statement = $session->prepare('INSERT INTO data (id, url, shortlink, is_geo, radius, latitude, longitude, when_created) VALUES (?,?,?,?,?,?,?,toTimestamp(now())) USING TTL 20');
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if ($is_geo == 1) {
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$options = array($rand_num,$url,$shortlink,boolval($is_geo),intval($radius), $latitude, $longitude);
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} else {
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$options = array($rand_num,$url,$shortlink,boolval($is_geo),null,null,null);
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}
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$result = $session->execute($statement,array('arguments' => $options));
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//$stringRepresentation= json_encode($result[0]);
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//printf("%s\n\n\n",$stringRepresentation);
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//foreach($result as $row) {
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// if (is_null($row)) {
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// printf('Unsuccessful');
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// } else {
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printf('Successful: The URL you entered was: %s and your GLink is: https://glink.zip/%s', $url,$shortlink);
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// }
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//}
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//printf('Done');
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?>
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