Added code to fetch the user's location, and send it as a GET/POST variable

Fixed bug where I accessed the database without opening a session
Added form field to allow user to georestrict the link
2023-06-12 15:29:24 -05:00 · 2023-06-12 15:28:30 -05:00 · 2023-06-12 15:28:02 -05:00 · 2023-06-09 20:03:30 -05:00 · 2023-06-09 20:03:01 -05:00 · 2023-06-08 21:36:33 -05:00
5 changed files with 272 additions and 71 deletions
--- a/index.html
+++ b/index.html
@@ -7,17 +7,33 @@
 <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>

+	<br><br>
+	<label for="restricted">Geo-restricted?: </label><input type="checkbox" name="restricted" id="restricted">
+	<br><br>
+	<label for="radius">Radius: </label>
+	<select name="radius" id="radius">
+		<option value="5">5 mi</option>
+		<option value="10">10 mi</option>
+		<option value="15">15 mi</option>
+		<option value="20">20 mi</option>
+	</select>
        <br><br>
        <input type="submit" id="button" value="Zip It!">
+
+
+	<input type="hidden" name="latitude" id="latitude">
+	<input type="hidden" name="longitude" id="longitude">
    </form>
    <hr>
    <div>
--- a/index.js
+++ b/index.js
@@ -1,67 +1,127 @@
-const submit = document.getElementById("button");
-submit.addEventListener('click', validate);
-function validate(e) {
-    e.preventDefault();
+// const submit = document.getElementById("button");
+// submit.addEventListener('click', validate);

-    const url = document.getElementById("URL");
-    const glink = document.getElementById("GLink");
-    // if (!url) {
-    //     /* Flag */
-    // }
-    let valid = true;
-    const domainExp = new RegExp("http(s)*:\\/\\/[a-zA-Z0-9\\-]+(\\.[a-zA-Z0-9\\-]+)+");
-    const filepathExp = new RegExp("[a-zA-Z]+");
-    let count = 0;
-    let index = -1;
-    let domain = "";
-    let filepath = "";
-    for (let i=0; i < url.value.length; i++) {
-        if (url.value.charAt(i) == '/') {
-            count++;
+mycheckbox = document.getElementById("restricted");
+mycheckbox.addEventListener('change',checkboxCallback);
+
+function checkboxCallback(event) {
+	if (event.currentTarget.checked) {
+		getLocation();
+	}
+}
+
+function getLocation() {
+	if (navigator.geolocation) {
+		navigator.geolocation.getCurrentPosition(showPosition);
+	  } else {
+		  console.log("Your browser does not support geolocation.");
+	  }
+}
+
+function showPosition(position) {
+	console.log(position.coords.latitude);
+	console.log(position.coords.longitude);
+
+	document.getElementById("latitude").value = position.coords.latitude;
+	document.getElementById("longitude").value = position.coords.longitude;
+}
+
+
+function validate() {
+	//e.preventDefault();
+
+	const url = document.getElementById("URL");
+	let glink = document.getElementById("GLink");
+	const error = document.getElementById("error");
+	// if (!url) {
+	//     /* Flag */
+	// }
+	let valid = true;
+	const domainExp = new RegExp("^http(s)*:\\/\\/[a-zA-Z0-9\\-]+(\\.[a-zA-Z0-9\\-]+)+$");
+	const filepathExp = new RegExp("^[a-zA-Z]+$");
+        const glinkExp = new RegExp("^[a-zA-Z]*$");
+        let glinkStr = glink.value;
+        let count = 0;
+        let index = -1;
+        let domain = "";
+        let filepath = "";
+        for (let i = 0; i < url.value.length; i++) {
+            if (url.value.charAt(i) == '/') {
+                count++;
+            }
+            if (count == 3) {
+                index = i;
+                break;
+            }
        }
-        if (count == 3) {
-            index = i;
-            break;
-        }
-    }
-    if (count >= 3) {
-        domain = url.value.substring(0, index);
-        if (index == url.value.length - 1) {
-            filepath = url.value.charAt(index);
+        if (count >= 3) {
+            domain = url.value.substring(0, index);
+            if (index == url.value.length - 1) {
+                filepath = url.value.charAt(index);
+            } else {
+                filepath = url.value.substring(index, url.value.length - 1);
+            }
+            alert("Domain is " + domain + " filepath is " + filepath);
        } else {
-            filepath = url.value.substring(index, url.value.length - 1);
+            domain = url.value;
        }
-        alert("Domain is " + domain + " filepath is " + filepath);
-    } else {
-        domain = url.value;
-    }
-    console.log(domain);
-    if (domain.match(domainExp)) /** and is available? */{
-        const error = document.getElementById("error");
-        if (error.classList.contains("visible")) {
-            error.classList.remove("visible");
-        }
-        if (url.classList.contains("invalid")) {
-            url.classList.remove("invalid");
-        }
-        url.classList.add("valid");
-        error.setAttribute('aria-hidden', true);
-        error.setAttribute('aria-invalid', false);
-        console.log("Valid");
-        return valid;
-    } else {
+        console.log(domain);

-        /*flag*/
-        const error = document.getElementById("error");
-        error.classList.add("visible");
-
-        //error.classList.add("hidden");
-        if (url.classList.contains("valid")) {
-            url.classList.remove("valid");
+        if (glinkStr === "") {
+            var result = window.confirm("You have left the glink field blank. A random one will be generated for you.");
+            if (result === false) {
+                return false;
+            } else {
+                glinkStr = getRandomGLink();
+            }
        }
-        url.classList.add("invalid");
-        error.setAttribute('aria-hidden', false);
-        error.setAttribute('aria-invalid', true);
-    }

-}
+
+        if (domain.match(domainExp) && glinkStr.match(glinkExp))/** and is available? */{
+            if (error.classList.contains("visible")) {
+                error.classList.remove("visible");
+            }
+            if (url.classList.contains("invalid")) {
+                url.classList.remove("invalid");
+            }
+            url.classList.add("valid");
+            if (glink.classList.contains("invalid")) {
+                glink.classList.remove("invalid");
+            }
+            glink.classList.add("valid");
+            error.setAttribute('aria-hidden', true);
+            error.setAttribute('aria-invalid', false);
+            console.log("Valid with url= " +url.value+ " glink=" +glink);
+            return valid;
+        } else {
+            /*flag*/
+            error.classList.add("visible");
+
+            //error.classList.add("hidden");
+            if (!domain.match(domainExp)) {
+                if (url.classList.contains("valid")) {
+                    url.classList.remove("valid");
+                }
+                url.classList.add("invalid");
+            } else {
+                if (url.classList.contains("invalid")) {
+                    url.classList.remove("invalid");
+                }
+                url.classList.add("valid");
+            }
+            if (!glinkStr.match(glinkExp)) {
+                if (glink.classList.contains("valid")) {
+                    glink.classList.remove("valid");
+                }
+                glink.classList.add("invalid");
+            } else {
+                if (glink.classList.contains("invalid")) {
+                    glink.classList.remove("invalid");
+                }
+                glink.classList.add("valid");
+            }
+            error.setAttribute('aria-hidden', false);
+            error.setAttribute('aria-invalid', true);
+            return false;
+        }
+}
--- a/redirect.php
+++ b/redirect.php
@@ -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: " . $row['url']);
+			}
+		}
+	}
+
+?>
--- a/result.js
+++ b/result.js
@@ -1,8 +0,0 @@
-const cassandra = require('cassandra-driver');
-
-const client = new cassandra.Client({
-	contactPoints: ['127.0.0.1:9042'],
-	keyspace: 'glink',
-});
-
-const query = 
--- a/result.php
+++ b/result.php
@@ -0,0 +1,97 @@
+<?php
+
+function gen_base62_rand_shortlink($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();
+$keyspace = 'glink';
+$session = $cluster->connect($keyspace);
+
+$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 shortlink=? ALLOW FILTERING');
+		$result = $session->execute($statement,array('arguments' => array($shortlink)));
+
+		if ($result->count() != 0) {
+			goto gen_shortlink;
+		}
+
+}
+
+//$statement = new Cassandra\SimpleStatement('SELECT name FROM data WHERE id=5');
+
+$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');
+
+?>
Author	SHA1	Message	Date
Aadhavan Srinivasan	ae036686b8	Added code to fetch the user's location, and send it as a GET/POST variable	2023-06-12 15:29:24 -05:00
Aadhavan Srinivasan	70f91c7586	Fixed bug where I accessed the database without opening a session	2023-06-12 15:28:30 -05:00
Aadhavan Srinivasan	913d53b757	Added form field to allow user to georestrict the link	2023-06-12 15:28:02 -05:00
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