From 24eea9a2fe5f4b1eca8190e1082e4e9334b1a034 Mon Sep 17 00:00:00 2001
From: Marc Mintel <marc@mintel.me>
Date: Fri, 6 Feb 2026 12:22:32 +0100
Subject: [PATCH] fix(middleware): resolve 0.0.0.0 hydration issues and add
 header logging

---
 middleware.ts | 41 ++++++++++++++++++++++++++++++-----------
 1 file changed, 30 insertions(+), 11 deletions(-)

diff --git a/middleware.ts b/middleware.ts
index b7f6450c..6e423e74 100644
--- a/middleware.ts
+++ b/middleware.ts
@@ -1,6 +1,5 @@
 import createMiddleware from 'next-intl/middleware';
-import { NextResponse } from 'next/server';
-import type { NextRequest } from 'next/server';
+import { NextResponse, NextRequest } from 'next/server';
 
 // Create the internationalization middleware
 const intlMiddleware = createMiddleware({
@@ -11,23 +10,43 @@ const intlMiddleware = createMiddleware({
   defaultLocale: 'en',
 });
 
-// Main middleware that logs all requests
 export default function middleware(request: NextRequest) {
-  const startTime = Date.now();
   const { method, url, headers } = request;
-  const userAgent = headers.get('user-agent') || 'unknown';
-  const referer = headers.get('referer') || 'none';
-  const ip = headers.get('x-forwarded-for') || headers.get('x-real-ip') || 'unknown';
 
-  // Log incoming request
-  console.log(`Incoming request: method=${method} host=${headers.get('host')} url=${url}`);
+  // Build header object for logging
+  const headerObj: Record<string, string> = {};
+  headers.forEach((value, key) => {
+    headerObj[key] = value;
+  });
+
+  // Defensive URL correction
+  // If the URL contains 0.0.0.0 (internal IP), we rebuild it using the Host header
+  let effectiveRequest = request;
+  if (url.includes('0.0.0.0')) {
+    const proto = headers.get('x-forwarded-proto') || 'https';
+    const host = headers.get('host') || 'testing.klz-cables.com';
+    const newUrl = new URL(url);
+    newUrl.protocol = proto;
+    newUrl.host = host;
+    effectiveRequest = new NextRequest(newUrl, {
+      headers: request.headers,
+      method: request.method,
+      body: request.body,
+    });
+    console.log(
+      `Replaced 0.0.0.0 URL with: ${newUrl.toString()} | Original Host: ${headers.get('host')} | Headers: ${JSON.stringify(headerObj)}`,
+    );
+  }
 
   try {
     // Apply internationalization middleware
-    const response = intlMiddleware(request);
+    const response = intlMiddleware(effectiveRequest);
     return response;
   } catch (error) {
-    console.error(`Request failed: method=${method} url=${url}`, error);
+    console.error(
+      `Request failed: method=${method} url=${url} headers=${JSON.stringify(headerObj)}`,
+      error,
+    );
     throw error;
   }
 }