Fix Webflow proxying with www-prefixed hostname and proper request handling (e2b-dev#634)

This PR resolves the Cloudflare IP blocking issue by:

1. Adding www prefix to landing page hostname
2. Properly handling request headers with new Headers object
3. Adding redirect handling to follow redirects
4. Refactoring middleware response handling for proper URL rewriting

These changes prevent Cloudflare from identifying our requests as
suspicious automated traffic while maintaining the functionality of our
proxy middleware.

Author: ben-fornefeld

apps/web/src/app/hostnames.ts

@@ -1,5 +1,5 @@
 // We are in the process of migrating to the new landing page hosting.
-export const landingPageHostname = 'e2b-landing-page.com'
+export const landingPageHostname = 'www.e2b-landing-page.com'
 export const landingPageFramerHostname = 'e2b-landing-page.framer.website'
 export const blogFramerHostname = 'e2b-blog.framer.website'
 export const changelogFramerHostname = 'e2b-changelog.framer.website'

apps/web/src/middleware.ts

@@ -1,6 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server'
-import { replaceUrls } from '@/utils/replaceUrls'
 import { landingPageHostname, landingPageFramerHostname } from '@/app/hostnames'
+import { replaceUrls } from '@/utils/replaceUrls'
 
 export async function middleware(req: NextRequest): Promise<NextResponse> {
   if (req.method !== 'GET') return NextResponse.next()
@@ -48,23 +48,34 @@ export async function middleware(req: NextRequest): Promise<NextResponse> {
     }
   }
 
+  const headers = new Headers(req.headers)
+
   // TODO: Not on the new landing page hosting yet
   if (url.pathname.startsWith('/ai-agents')) {
     url.hostname = landingPageFramerHostname
-  }
 
-  const res = await fetch(url.toString(), { ...req })
+    const res = await fetch(url.toString(), {
+      ...req,
+      headers,
+      redirect: 'follow',
+    })
 
-  const htmlBody = await res.text()
+    const htmlBody = await res.text()
 
-  // !!! NOTE: Replace has intentionally not completed quotes to catch the rest of the path !!!
-  const modifiedHtmlBody = replaceUrls(htmlBody, url.pathname, 'href="', '">')
+    // !!! NOTE: Replace has intentionally not completed quotes to catch the rest of the path !!!
+    const modifiedHtmlBody = replaceUrls(htmlBody, url.pathname, 'href="', '">')
 
-  return new NextResponse(modifiedHtmlBody, {
-    status: res.status,
-    statusText: res.statusText,
-    headers: res.headers,
-    url: req.url,
+    return new NextResponse(modifiedHtmlBody, {
+      status: res.status,
+      statusText: res.statusText,
+      headers: res.headers,
+      url: req.url,
+    })
+  }
+
+  return NextResponse.rewrite(url.toString(), {
+    ...req,
+    headers,
   })
 }
 
@@ -80,4 +91,4 @@ export const config = {
     '/pricing/:path*',
     '/cookbook/:path*',
   ],
-}
+}