> For the complete documentation index, see [llms.txt](https://docs.audit.venturytechnology.fr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.audit.venturytechnology.fr/authentifications/middleware-proxy.ts.md).

# Middleware (proxy.ts)

Le middleware intercepte **toutes les requêtes** et applique ces règles : 

{% code overflow="wrap" %}

```
/auth -> bloquer si la session existe, redirection vers /result 
/result -> bloquer si la session n'existe pas, redirection vers /auth
/auth/mfa -> bloquer si il le code n'existe pas, redirection vers /auth 
/auth/verify -> bloquer si l'utilisateur n'est pas vérifier, redirection vers/auth/mfa
```

{% endcode %}

{% code overflow="wrap" %}

```typescript
import { NextRequest, NextResponse } from "next/server";

export function proxy(request: NextRequest) {
  const path = request.nextUrl.pathname;
  const session = request.cookies.get("auth_session")?.value;
  const mfaExpected = request.cookies.get("mfa_expected_code")?.value;
  const mfaVerified = request.cookies.get("mfa_verified")?.value;

  if (session && path.startsWith("/auth")) {
    return NextResponse.redirect(new URL("/result", request.url));
  }

  if (path.startsWith("/result") && !session) {
    return NextResponse.redirect(new URL("/auth", request.url));
  }

  if (path.startsWith("/auth/mfa") && !mfaExpected) {
    return NextResponse.redirect(new URL("/auth", request.url));
  }

  if (path.startsWith("/auth/verify") && !mfaVerified) {
    return NextResponse.redirect(new URL("/auth/mfa", request.url));
  }

  return NextResponse.next();
}

export const config = {
  matcher: [
    "/((?!api|_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)",
  ],
};

```

{% endcode %}


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