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nextjs-request-url-proxy-redirect

Replace request.url with a public base URL from NEXT_PUBLIC_APP_URL for Next.js redirects.

Updated Jan 23, 2026
Search Tags:#deployment#Next.js#environment-variables#redirect#containerized#request.url#public-url
One-click install
npx skills add https://github.com/strataga/claude-skill-inception --skill nextjs-request-url-proxy-redirect
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: nextjs-request-url-proxy-redirect
Source: https://github.com/strataga/claude-skill-inception/tree/main/nextjs-request-url-proxy-redirect
Command: npx skills add https://github.com/strataga/claude-skill-inception --skill nextjs-request-url-proxy-redirect

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

When deploying Next.js to containerized environments like Railway, Vercel, or Docker, NextResponse.redirect can end up using an internal proxy URL (for example, http://localhost:8080) instead of the public domain, causing ERR_CONNECTION_REFUSED. This skill guides you to always use a public base URL for redirects.

Core Features & Use Cases

  • Replace request.url with a public base URL derived from an environment variable NEXT_PUBLIC_APP_URL.
  • Provide a reusable helper (getBaseUrl) to centralize the base URL logic.
  • Works across containerized deployments (Railway, Vercel, Docker) for API routes and middleware redirects.

Quick Start

Set NEXT_PUBLIC_APP_URL in your environment (e.g., https://example.com). Update redirect logic to use a baseUrl derived from NEXT_PUBLIC_APP_URL, and optionally expose a helper like getBaseUrl() to keep redirects consistent.

Frequently Asked Questions about nextjs-request-url-proxy-redirect

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Why does my Next.js redirect go to localhost and cause ERR_CONNECTION_REFUSED?▼

Next.js redirects use localhost in containerized environments because NextResponse.redirect defaults to the internal proxy request.url instead of the public domain. You must replace request.url with an environment-derived public base URL to resolve this.

How do I fix NextResponse.redirect in Docker or Railway deployments?▼

To fix NextResponse.redirect in Docker or Railway, set the NEXT_PUBLIC_APP_URL environment variable to your public domain and use a reusable helper function to derive the base URL for redirect logic instead of request.url.

What is the best way to handle Next.js redirects in containerized environments?▼

The best way to handle Next.js redirects in containerized environments is to centralize the logic using a getBaseUrl helper that reads from the NEXT_PUBLIC_APP_URL environment variable, ensuring redirects consistently point to the public URL.

Does this Next.js redirect fix work for both API routes and middleware?▼

Yes, replacing request.url with an environment-derived base URL works for both API routes and middleware redirects across containerized deployments like Railway, Vercel, and Docker, ensuring all redirects use the public domain.

Do I need environment variables to fix Next.js container redirect issues?▼

Yes, you must set the NEXT_PUBLIC_APP_URL environment variable to your public URL. This provides the correct base URL for the redirect helper, overriding the internal container URL that causes connection refused errors.

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