From 3991265addba87726a99509250bbdc562d157863 Mon Sep 17 00:00:00 2001
From: skidoodle <contact@albert.lol>
Date: Wed, 24 Jan 2024 10:37:11 +0100
Subject: [PATCH 1/2] optimize link validation

---
 src/pages/api/validate.ts | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/src/pages/api/validate.ts b/src/pages/api/validate.ts
index 1963150..004d0ac 100644
--- a/src/pages/api/validate.ts
+++ b/src/pages/api/validate.ts
@@ -6,6 +6,7 @@ export default async function handler(
 ) {
   const { link } = req.query as { link: string }
   let missingParam: string | null = null
+
   if (!link) {
     missingParam = 'link'
   }
@@ -15,20 +16,26 @@ export default async function handler(
   }
 
   const domain = link.split('/')[2]
-  if (domain !== 'erettsegi.albert.lol') {
+  if (domain !== 'localhost:3000' && domain !== 'erettsegi.albert.lol') {
     return res.status(400).json({ error: 'Érvénytelen link' })
   }
 
   try {
-    res.setHeader('Cache-Control', 's-maxage=31536000')
     const { protocol, host } = new URL(link)
-    if (protocol && host) {
-      const response = await fetch(link, { method: 'HEAD' })
-      const status = response.status
-      res.status(200).json({ status })
-    } else {
+    if (!protocol || !host) {
       return res.status(400).json({ error: 'Érvénytelen link' })
     }
+
+    const response = await fetch(link, { method: 'OPTIONS' })
+
+    if (!response.ok) {
+      return res
+        .status(400)
+        .json({ error: 'Invalid host or network unreachable' })
+    }
+
+    const status = response.status
+    res.status(200).json({ status })
   } catch (error) {
     res.status(500).json({ error: 'Internal Server Error' })
   }

From 36a8fd8780594e1cec01db13cd3f26ece9c40049 Mon Sep 17 00:00:00 2001
From: skidoodle <contact@albert.lol>
Date: Wed, 24 Jan 2024 10:37:19 +0100
Subject: [PATCH 2/2] use deterministic returns

---
 src/pages/_error.tsx | 50 ++++++++++++++++++++++++++------------------
 1 file changed, 30 insertions(+), 20 deletions(-)

diff --git a/src/pages/_error.tsx b/src/pages/_error.tsx
index bb273f5..50529de 100644
--- a/src/pages/_error.tsx
+++ b/src/pages/_error.tsx
@@ -1,12 +1,33 @@
 import { Footer } from '@/components/Footer'
 import { Button } from '@nextui-org/button'
-import Link from 'next/link'
 import type { GetServerSideProps, GetServerSidePropsContext } from 'next'
 
 interface ErrorProps {
   statusCode: number
 }
 
+const NotFound: React.FC = () => (
+  <>
+    <p className='mt-2'>Az keresett oldal nem található.</p>
+    <p className='mt-8 text-center'>
+      <Button color='primary' onPress={() => (window.location.href = '/')}>
+        Vissza
+      </Button>
+    </p>
+  </>
+)
+
+const Unexpected: React.FC = () => (
+  <>
+    <p className='mt-2'>Váratlan hiba történt.</p>
+    <p className='mt-8 text-center'>
+      <Button color='primary' onPress={() => (window.location.href = '/')}>
+        Vissza
+      </Button>
+    </p>
+  </>
+)
+
 const ErrorPage: React.FC<ErrorProps> = ({ statusCode }) => {
   return (
     <>
@@ -19,25 +40,14 @@ const ErrorPage: React.FC<ErrorProps> = ({ statusCode }) => {
             <div className='flex flex-col items-center justify-center'>
               <div className='mt-5 mb-3'>
                 <div className='text-2xl font-semibold text-gray-600'>
-                  {statusCode == 404 ? (
-                    <>
-                      <p className='mt-2'>Az keresett oldal nem található.</p>
-                      <p className='mt-8 text-center'>
-                        <Button color='primary'>
-                          <Link href='/'>{'Vissza'}</Link>
-                        </Button>
-                      </p>
-                    </>
-                  ) : (
-                    <>
-                      <p className='mt-2'>Váratlan hiba történt.</p>
-                      <p className='mt-8 text-center'>
-                        <Button color='primary'>
-                          <Link href='/'>{'Vissza'}</Link>
-                        </Button>
-                      </p>
-                    </>
-                  )}
+                  {(() => {
+                    switch (statusCode) {
+                      case 404:
+                        return <NotFound />
+                      default:
+                        return <Unexpected />
+                    }
+                  })()}
                 </div>
               </div>
             </div>