From 236859949714c5e2382caf265385dc06ec7dcb3d Mon Sep 17 00:00:00 2001
From: Mango <144482551+outment@users.noreply.github.com>
Date: Sun, 23 Feb 2025 20:25:44 -0800
Subject: [PATCH] Added error page.

---
 503.html | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 app.js   |  9 +++++++
 2 files changed, 83 insertions(+)
 create mode 100644 503.html
diff --git a/503.html b/503.html
new file mode 100644
index 0000000..08bfb2b
--- /dev/null
+++ b/503.html
@@ -0,0 +1,74 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Proxy Route Failure</title>
+    <style>
+        body {
+            font-family: Arial, sans-serif;
+            background-color: #f4f4f4;
+            margin: 0;
+            padding: 0;
+            color: #333;
+        }
+
+        .container {
+            padding: 2rem;
+        }
+
+        h2 {
+            color: #007bff;
+        }
+
+        h1 {
+            color: #007bff;
+        }
+
+        .endpoint {
+            background-color: #fff;
+            border: 1px solid #ddd;
+            margin: 1rem 0;
+            padding: 1rem;
+            border-radius: 4px;
+        }
+
+        .endpoint code {
+            background-color: #f4f4f4;
+            padding: 0.2rem;
+            border-radius: 4px;
+        }
+
+        .request-method {
+            font-weight: bold;
+            color: #333;
+        }
+
+        .response {
+            background-color: #f8f9fa;
+            padding: 1rem;
+            margin-top: 1rem;
+            border-radius: 4px;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="container">
+        <div class="endpoint">
+            <h1>Proxy Route Failure</h3>
+            <p class="request-method">GET [REDACTED]</p>
+            <p>PFPRXY failed to connect to Project Furina Servers.</p>
+
+            <h2>Further Information</h4>
+            <div class="response">
+                <pre>Project Furina Proxy attempted to connect to the target machine, but the target machine did not respond in a timely matter.</pre>
+                <pre>ERROR: PFPRXY_CONNECTION_TIMEOUT</pre>
+            </div>
+            <i>PFPRXY encountered a connection error, therefore you are not able to access this website at the moment.</i>
+        </div>
+    </div>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/app.js b/app.js
index 9579181..0841d69 100644
--- a/app.js
+++ b/app.js
@@ -1,8 +1,10 @@
 const net = require('net')
 const http = require('http')
+const fs = require('fs')
 const httpProxy = require('http-proxy')
 
 const PORT = process.env.PORT || 3000
+const errorPage = fs.readFileSync('503.html', 'utf8')
 
 function createProxyAgent(req) {
   return new http.Agent({
@@ -17,6 +19,13 @@ function createProxyAgent(req) {
 
 const proxy = httpProxy.createProxyServer({})
 
+proxy.on('error', (err, req, res) => {
+  if (res) {
+    if (!res.headersSent) res.writeHead(503, { 'Content-Type': 'text/html' })
+    res.end(errorPage)
+  }
+})
+
 const server = http.createServer((req, res) => {
   const targetUrl = 'http://147.185.221.25:33187'
   const agent = createProxyAgent(req)
