@flancer32/teq-web

@flancer32/teq-web is a modular request dispatcher and web server for Node.js applications.
It follows the principles of the TeqFW architecture but works independently and can be integrated into any Node.js project.
The plugin offers a flexible, pluggable HTTP/2-capable server with three-stage handler processing and dependency-driven execution order.

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Overview

This package provides:

• A dispatcher that processes HTTP requests in three well-defined stages: pre, process, post.
• A handler interface for modular request handling across plugins or components.
• A built-in server based on Node.js libraries (http, http2), supporting TLS via http2.createSecureServer().
• Support for relative handler ordering using before / after declarations and topological sorting.
• Compatibility with external servers like Express/Fastify by using the dispatcher as middleware.
• Minimal dependencies and full support for dependency injection via @teqfw/di.

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Architecture

The dispatcher runs HTTP requests through a consistent three-phase pipeline:

1. Pre-processing (pre) — All handlers are executed in a defined order (e.g., logging, authentication).
2. Processing (process) — Handlers are checked sequentially until one returns true (request handled).
3. Post-processing (post) — All handlers are executed unconditionally, even after errors.

Each handler provides its registration metadata via the getRegistrationInfo() method. Execution order is resolved with a built-in implementation of Kahn's algorithm.

Example handler definition:

const My_Handler = {
    getRegistrationInfo: () => Object.freeze({
        name: 'My_Handler',
        stage: 'process', // can be 'pre', 'process', or 'post'
        before: [],
        after: [],
    }),

    handle: async (req, res) => {
        res.writeHead(200, {'Content-Type': 'text/plain'});
        res.end('Hello from My_Handler!');
        return true;
    },
};

export default My_Handler;

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Usage

This example shows how to create a minimal application that:

• Registers two handlers: a logger and a static file server
• Starts a secure HTTPS server using built-in components

The static handler reads from one or more sources described by the Handler_Source DTO. To expose selected files from node_modules, create a source with root: 'node_modules' and pass it to Handler_Static during initialization.

import Container from '@teqfw/di';
import {readFileSync} from 'node:fs';
import {join, resolve} from 'node:path';
import {fileURLToPath} from 'node:url';

// Resolve working directory
const __filename = fileURLToPath(import.meta.url);
const __dirname = resolve(__filename, '..');
const webRoot = join(__dirname, 'web');
const certs = join(__dirname, 'certs');

// DI container setup
const container = new Container();
const resolver = container.getResolver();
resolver.addNamespaceRoot('Fl32_Web_', './node_modules/@flancer32/teq-web/src');

// Get and configure built-in handlers
const logHandler = await container.get('Fl32_Web_Back_Handler_Pre_Log$');
const staticHandler = await container.get('Fl32_Web_Back_Handler_Static$');
const SourceCfg = await container.get('Fl32_Web_Back_Dto_Handler_Source$');
const srcNpm = SourceCfg.create({
    root: 'node_modules',
    prefix: '/node_modules/',
    allow: {
        vue: ['dist/vue.global.prod.js'],
        '@teqfw/di': ['src/Container.js'],
    }
});
const srcWeb = SourceCfg.create({ root: webRoot, prefix: '/' });
await staticHandler.init({sources: [srcNpm, srcWeb]});

// Register handlers
const dispatcher = await container.get('Fl32_Web_Back_Dispatcher$');
dispatcher.addHandler(logHandler);
dispatcher.addHandler(staticHandler);

// Create and start the server
const server = await container.get('Fl32_Web_Back_Server$');
await server.start({
    port: 3443,
    type: 'https',
    tls: {
        key: readFileSync(join(certs, 'key.pem'), 'utf8'),
        cert: readFileSync(join(certs, 'cert.pem'), 'utf8'),
        ca: readFileSync(join(certs, 'ca.pem'), 'utf8'),
    }
});

This will start an HTTPS server on port 3443 with:

• Fl32_Web_Back_Handler_Pre_Log logging each request method and URL;
• Fl32_Web_Back_Handler_Static serving files from node_modules and the /web folder.

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Using with Express or Fastify

The dispatcher can be connected to external web frameworks instead of the built-in server.

// Express
const app = Express();
app.use(async (req, res) => {
    await dispatcher.onEventRequest(req, res);
});
app.listen(3000);

// Fastify
const fastify = Fastify();
fastify.all('*', async (request, reply) => {
    const req = request.raw;
    const res = reply.raw;
    await dispatcher.onEventRequest(req, res);
});
await fastify.listen({port: 3000});

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Installation

npm install @flancer32/teq-web

This plugin requires a configured @teqfw/di container and optionally integrates with TeqFW-based apps.

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Status

This package is under active development and already used in real-world applications. Documentation is built using the 3DP method (Dialog-Driven Development Process) and evolves alongside actual use cases.