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Added code to generate a random GLink if the user doesn't submit one

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Aadhavan Srinivasan
2023-06-09 20:03:30 -05:00
parent 0f85fcf021
commit 8b68547644
1 changed files with 68 additions and 18 deletions
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86
result.php
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@@ -1,8 +1,36 @@
<?php
function gen_base62_rand_shortlink($len) {
$rand_bytes = random_bytes(intval(($len * 2) / 3));
$rand_string = base64_encode($rand_bytes);
$rand_string = str_replace("+","",$rand_string);
$rand_string = str_replace("/","",$rand_string);
$rand_string = str_replace("=","",$rand_string);
if (mb_strlen($rand_string) < $len) {
$curlen = mb_strlen($rand_string);
$rand_string = $rand_string . gen_rand_shortlink($len - $curlen);
}
return $rand_string;
}
function gen_rand_shortlink($len) {
$to_return = '';
$possible_chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
while (mb_strlen($to_return) < $len) {
$to_return = $to_return . $possible_chars[rand(0, mb_strlen($possible_chars)-1)];
}
return $to_return;
}
ini_set('display_errors', 1);
use Casssandra;
$cluster = Cassandra::cluster()->build();
$cluster = Cassandra::cluster()->withPersistentSessions(true)->build();
$keyspace = 'glink';
$url = $_GET["url"];
@@ -13,36 +41,58 @@ if (($matches == 0) || ($matches == false)) {
}
$shortlink = $_GET["glink"];
$matches_shortlink = preg_match('/^[a-zA-Z]+$/',$shortlink);
if (($matches_shortlink == 0) || ($matches_shortlink == false)) {
printf("The GLink entered was invalid. The GLink can only contain letters. Please try again.");
return;
}
if ($shortlink != '') {
$matches_shortlink = preg_match('/^[a-zA-Z]+$/',$shortlink);
if (($matches_shortlink == 0) || ($matches_shortlink == false)) {
printf("The GLink entered was invalid. The GLink can only contain letters. Please try again.");
return;
}
} else {
/* generate a random shortlink */
gen_shortlink:
$rand_string = gen_rand_shortlink(6); /* the function is defined at the start of this file */
$shortlink = $rand_string;
/* Check if shortlink is already taken by querying the database */
$statement = $session->prepare('SELECT url FROM data WHERE id=?');
$result = $session->execute($statement,array('arguments' => array($shortlink)));
if ($result->count() != 0) {
goto gen_shortlink;
}
}
$session = $cluster->connect($keyspace);
//$statement = new Cassandra\SimpleStatement('SELECT name FROM data WHERE id=5');
$statement = $session->prepare('SELECT url FROM data WHERE shortlink=? ALLOW FILTERING');
$options = array('arguments' => array($shortlink));
$result = $session->execute($statement,$options);
if ($result->count() != 0) {
printf('That GLink is already taken. Please try another one.');
exit;
}
$rand_num = rand(0,99999999);
$statement = $session->prepare('INSERT INTO data (id, url, shortlink, when_created) VALUES (?,?,?,toTimestamp(now()))');
$statement = $session->prepare('INSERT INTO data (id, url, shortlink, when_created) VALUES (?,?,?,toTimestamp(now())) USING TTL 20');
$result = $session->execute($statement,array('arguments' => array($rand_num,$url,$shortlink)));
$statement = $session->prepare('SELECT url,shortlink FROM data WHERE id=?');
$options = array('arguments' => array($rand_num));
$result = $session->execute($statement,$options);
//$stringRepresentation= json_encode($result[0]);
//printf("%s\n\n\n",$stringRepresentation);
foreach($result as $row) {
if (is_null($row)) {
printf('Unsuccessful');
} else {
printf('Successful: The URL you entered was: %s and your GLink is: https://glink.zip/%s', $row['url'],$row['shortlink']);
}
}
//foreach($result as $row) {
// if (is_null($row)) {
// printf('Unsuccessful');
// } else {
printf('Successful: The URL you entered was: %s and your GLink is: https://glink.zip/%s', $url,$shortlink);
// }
//}
//printf('Done');
?>