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base: aravind:nodejs
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aravind:master aravind:php aravind:nodejs
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compare: aravind:8b6854764459d9025c140c346a58a428634da33d
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aravind:php aravind:nodejs aravind:master

11 Commits
nodejs ... 8b68547644

Author SHA1 Message Date
Aadhavan Srinivasan
8b68547644 Added code to generate a random GLink if the user doesn't submit one 2023-06-09 20:03:30 -05:00
Aadhavan Srinivasan
0f85fcf021 Made the Glink field optional 2023-06-09 20:03:01 -05:00
Aadhavan Srinivasan
1d4606db27 Added code to redirect the user if the database query returns a URL 2023-06-08 21:36:33 -05:00
Aadhavan Srinivasan
116bbe5218 Started working on redirect when user enters a GLink 2023-06-08 10:46:59 -05:00
Aadhavan Srinivasan
1b52864952 Added server-side checks to input 2023-06-08 10:46:41 -05:00
Aadhavan Srinivasan
92b70e632b Added code to print out the inserted data, and to check if the data was inserted by querying the database for the inserted data 2023-06-08 01:32:30 -05:00
Aadhavan Srinivasan
c81937d6a5 Added code to insert data into Cassandra DB 2023-06-06 23:53:32 -05:00
Aadhavan Srinivasan
f451850601 DO NOT USE - SWITCHED TO PHP INSTEAD - Added code to make database query 2023-06-06 13:23:27 -05:00
Aadhavan Srinivasan
3bc6a56516 Added PHP file to make database queries 2023-06-06 13:22:15 -05:00
Aadhavan Srinivasan
536af5f9c5 Removed event parameter from function so that it could be used with the HTML form 'onsubmit' 2023-06-06 13:21:57 -05:00
Aadhavan Srinivasan
e5bdf2cc2c Switched to PHP instead of node.js, fixed bug where PHP would not be called regardless of input 2023-06-06 13:21:23 -05:00
5 changed files with 152 additions and 17 deletions
Expand all files Collapse all files

8
index.html
View File

@@ -7,12 +7,14 @@
<body>
<div id="root">
<h1>Link Shortener</h1>
<form id="form" action="result.js">
<form id="form" method="GET" action="result.php" onsubmit="return validate()">
<!-- <form id="form"> -->
<label for="url">URL:</label><span class="mandatory">*</span>
<input type="text" name="url" id="URL" value="example.com" required><br><br>
<input type="text" name="url" id="URL" value="https://example.com" required><br><br>
<label for="labels">GLink:</label><span class="mandatory">*</span>
<label for="GLink" id="labels" class="glink">glink.zip/</label><input type="text" name="glink" id="GLink" class="glink" value="exampleWebsite" required>
<label for="GLink" id="labels" class="glink">glink.zip/</label><input type="text" name="glink" id="GLink" class="glink" value="exampleWebsite">
<span role="alert" id="error" aria-hidden="true">Invalid URL</span>

15
index.js
View File

@@ -1,7 +1,7 @@
const submit = document.getElementById("button");
submit.addEventListener('click', validate);
function validate(e) {
e.preventDefault();
//const submit = document.getElementById("button");
//submit.addEventListener('click', validate);
function validate() {
// e.preventDefault();
const url = document.getElementById("URL");
const glink = document.getElementById("GLink");
@@ -48,7 +48,13 @@ function validate(e) {
error.setAttribute('aria-hidden', true);
error.setAttribute('aria-invalid', false);
console.log("Valid");
return valid;
/* var xmlhttp = new XMLHttpRequest();
xmlhttp.open('GET','result.php',true);
xmlhttp.send();
console.log(xmlhttp.responseText);*/
} else {
/*flag*/
@@ -62,6 +68,7 @@ function validate(e) {
url.classList.add("invalid");
error.setAttribute('aria-hidden', false);
error.setAttribute('aria-invalid', true);
return false;
}
}

36
redirect.php Normal file
View File

@@ -0,0 +1,36 @@
<?php
use Cassandra;
$uri = $_SERVER['REQUEST_URI'];
$uri = substr($uri,1);
$matches_uri = preg_match('/^[a-zA-Z]+$/',$uri);
if (($matches_uri == 0) || ($matches_uri == false)) {
header("Location: http://glink.zip/");
exit;
} else {
$cluster = Cassandra::cluster()->withPersistentSessions(true)->build();
$keyspace = 'glink';
$session = $cluster->connect($keyspace);
$statement = $session->prepare('SELECT url FROM data WHERE shortlink=? ALLOW FILTERING;');
$result = $session->execute($statement,array('arguments' => array($uri)));
if ($result->count() == 0) {
printf('The given GLink was invalid, and doesn\'t point to a specific web page.');
exit;
}
foreach($result as $row) {
if (is_null($row)) {
printf('The given GLink was invalid, and doesn\'t point to a specific web page.');
exit;
} else {
header("Location: " . $row['url']);
}
}
}
?>

8
result.js
View File

@@ -1,8 +0,0 @@
const cassandra = require('cassandra-driver');
const client = new cassandra.Client({
contactPoints: ['127.0.0.1:9042'],
keyspace: 'glink',
});
const query =

98
result.php Normal file
View File

@@ -0,0 +1,98 @@
<?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()->withPersistentSessions(true)->build();
$keyspace = 'glink';
$url = $_GET["url"];
$matches = preg_match('/^http(s)*:\\/\\/[a-zA-Z0-9\\-]+(\\.[a-zA-Z0-9\\-]+)+$/',$url);
if (($matches == 0) || ($matches == false)) {
printf("The URL entered was invalid. Please try again.");
return;
}
$shortlink = $_GET["glink"];
if ($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())) USING TTL 20');
$result = $session->execute($statement,array('arguments' => array($rand_num,$url,$shortlink)));
//$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', $url,$shortlink);
// }
//}
//printf('Done');
?>