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    Middleware Chain Builder for Express/Next.js

    Neura Editorial April 24, 2026
    0 copies 0 likes

    Create middleware functions for logging, authentication, rate limiting, CORS, and request validation.

    Prompt
    Create a middleware for [purpose] in [Express/Next.js]. Requirements:
    - TypeScript with proper Request/Response/NextFunction types
    - Single responsibility — each middleware does one thing
    - Proper error propagation (call next(error) not throw)
    - Async middleware with try/catch wrapper
    - Configuration via factory function: createMiddleware(options)
    - Logging middleware: request method, path, duration, status code
    - Auth middleware: verify token, attach user to request, handle expiry
    - Rate limiting: sliding window, configurable limits per route
    - Validation: schema-based request validation with descriptive errors
    - CORS: configurable origins, methods, and headers
    - Request ID: generate and attach unique ID to each request
    - Each middleware should be independently testable
    - Export both the middleware and its configuration type
    - Handle edge cases: missing headers, malformed tokens, etc.

    How to Use

    Specify the middleware purpose and framework. Cursor generates the middleware function with configuration options and tests.

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