Add custom redirect rules (301/302)

[shigahi]

Summary

Add configurable URL redirect rules for SEO and URL migration purposes.

Background

When restructuring a site or changing URLs, 301 redirects are essential for maintaining SEO value. Commercial services like Bullet.so offer redirect management. This complements the existing subdomain redirect feature.

Proposed Configuration

redirectRules?: {
  from: string;      // e.g., "/old-page"
  to: string;        // e.g., "/new-page" or "https://example.com/page"
  permanent: boolean; // true = 301, false = 302
}[]

Implementation

Add redirect handling early in fetchAndApply:

const REDIRECT_RULES = [
  { from: '/old-url', to: '/new-url', permanent: true },
  // ...
];

// In fetchAndApply, before other routing:
for (const rule of REDIRECT_RULES) {
  if (url.pathname === rule.from) {
    const redirectUrl = rule.to.startsWith('http') 
      ? rule.to 
      : 'https://' + MY_DOMAIN + rule.to;
    return Response.redirect(redirectUrl, rule.permanent ? 301 : 302);
  }
}

UI Changes

Add "Redirect Rules" section in Advanced Settings:

• List of redirect rules with add/remove buttons
• Each rule has:
  • From path input
  • To path/URL input
  • Permanent redirect toggle (301 vs 302)

Use Cases

• URL restructuring while preserving SEO
• Migrating from another platform
• Shortening URLs for marketing campaigns
• Handling common typos/variations

References

• Bullet.so redirect feature
• Similar pattern to existing subdomainRedirects