From 12859a501e7f7b03ad7738d4be15ee24b5ddc1cf Mon Sep 17 00:00:00 2001
From: Jacob Andersen <jacob@algorithmjunkie.com>
Date: Wed, 4 Apr 2018 19:19:51 -0700
Subject: [PATCH 1/2] Make sure we check if the variables are set.

---
 shorty.php | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/shorty.php b/shorty.php
index 16546bf..c760e91 100644
--- a/shorty.php
+++ b/shorty.php
@@ -311,9 +311,17 @@ public function allow($ip) {
      * Starts the program.
      */
     public function run() {
-        $q = str_replace('/', '', $_GET['q']);
-        $url = urldecode($_GET['url']);
-        $format = strtolower($_GET['format']);
+	$q = str_replace('/', '', $_GET['q']);
+
+        $url = '';
+        if (isset($_GET['url'])) {
+          $url = urldecode($_GET['url']);
+        }
+
+        $format = '';
+        if (isset($_GET['format'])) {
+          $format = strtolower($_GET['format']);
+        }
 
         // If adding a new URL
         if (!empty($url)) {

From 235409b32cad1432a252c91b0687c2b21e35a0db Mon Sep 17 00:00:00 2001
From: Jacob Andersen <jacob@algorithmjunkie.com>
Date: Wed, 4 Apr 2018 19:22:17 -0700
Subject: [PATCH 2/2] Trigger 404 on homepage

---
 shorty.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/shorty.php b/shorty.php
index c760e91..59b24b6 100644
--- a/shorty.php
+++ b/shorty.php
@@ -311,7 +311,11 @@ public function allow($ip) {
      * Starts the program.
      */
     public function run() {
-	$q = str_replace('/', '', $_GET['q']);
+        $q = str_replace('/', '', $_GET['q']);
+        if (empty($q)) {
+          $this->not_found();
+          return;
+        }
 
         $url = '';
         if (isset($_GET['url'])) {