StackRa Ecosystem v1.0
High-throughput routing, cascading middleware pipelines, stateless security, and production REST engineering on modern Node.js runtimes.
High-throughput route matching, regex params & controller factories.
Cascading request-response pipelines, interceptors & context injection.
Stateless JWT, HTTP-only refresh cookies, RBAC & API keys.
Pragmatic REST standards, OpenAPI generation & rate limiting.
Production patterns for cascading middleware, resilient routing, and security.
Understand how Express executes cascading handler queues, error-handling middleware signatures (err, req, res, next), and request context encapsulation.
Configuring Helmet headers, strict Content Security Policy, rate-limiting tiers, and preventing prototype pollution vulnerabilities.
Structuring clean modular route trees with express.Router(), parameter validators with router.param(), and Dependency Injection controllers.
Eliminating unhandled promise rejections with Express 5 native async error routing and RFC 7807 problem detail representations.
Type-safe schema validation for params, query strings, and request bodies with automatic TypeScript inference.
Sub-millisecond API responses: implementing Cache-Control headers, stale-while-revalidate caches, and Nginx reverse proxy buffering.
Standard recipes for rate limiting, validation, error boundaries, and security hardening.
Validates req.body, req.query, and req.params against Zod schemas, stripping unknown keys and inferring TypeScript types.
import { Request, Response, NextFunction } from 'express';
import { AnyZodObject, ZodError } from 'zod';
export const validateRequest = (schema: AnyZodObject) => {
return async (req: Request, res: Response, next: NextFunction) => {
try {
await schema.parseAsync({
body: req.body,
query: req.query,
params: req.params,
});
return next();
} catch (error) {
if (error instanceof ZodError) {
return res.status(400).json({
status: 'fail',
errors: error.flatten().fieldErrors,
});
}
return next(error);
}
};
};Sliding-window IP rate limiting with Redis store fallback and standard RateLimit headers.
import rateLimit from 'express-rate-limit';
export const apiLimiter = rateLimit({
windowMs: 15 * 60 * 1000, // 15 minutes
max: 100, // Limit each IP to 100 requests per window
standardHeaders: true, // Return standard RateLimit-* headers
legacyHeaders: false, // Disable X-RateLimit-* headers
message: {
status: 429,
message: 'Too many requests from this IP. Please retry after 15 minutes.',
},
});
// Apply globally or on sensitive endpoints
app.use('/api/v1/auth/', apiLimiter);Comprehensive HTTP security headers and strict origin-whitelisting configuration.
import helmet from 'helmet';
import cors from 'cors';
export function configureSecurity(app: express.Express) {
// Sets secure HTTP headers (HSTS, CSP, XSS protection)
app.use(helmet());
// Strict CORS policy for production
const allowedOrigins = ['https://stackra.agency', 'https://api.stackra.agency'];
app.use(cors({
origin: (origin, callback) => {
if (!origin || allowedOrigins.includes(origin)) {
callback(null, true);
} else {
callback(new Error('Blocked by CORS policy'));
}
},
credentials: true,
methods: ['GET', 'POST', 'PUT', 'DELETE', 'PATCH'],
}));
}Global error-handling middleware conforming to RFC 7807 Problem Details for HTTP APIs.
import { Request, Response, NextFunction } from 'express';
export class AppError extends Error {
constructor(
public message: string,
public statusCode: number = 500,
public type: string = 'about:blank'
) {
super(message);
}
}
// Global 4-argument Express error handler
export const errorHandler = (
err: Error | AppError,
req: Request,
res: Response,
next: NextFunction
) => {
const statusCode = err instanceof AppError ? err.statusCode : 500;
res.status(statusCode).json({
type: err instanceof AppError ? err.type : 'https://api.stackra.agency/errors/internal',
title: statusCode === 500 ? 'Internal Server Error' : err.message,
status: statusCode,
instance: req.originalUrl,
timestamp: new Date().toISOString(),
});
};