node-media-server/src/vendor/http2-express/core.js

A Node.js implementation of RTMP Server

/* eslint-disable func-names */
/* eslint-disable no-underscore-dangle */
const EventEmitter = require('events');

const createHttp2Request = require('./http2Request');
const createHttp2Response = require('./http2Response');
const initHttp2Express = require('./initHttp2Express');

const createHttp2Express = (express) => {
  const {
    application,
    request,
    response,
    Router,
    query
  } = express;

  application.lazyrouter = function lazyrouter() {
    if (!this._router) {
      this._router = new Router({
        caseSensitive: this.enabled('case sensitive routing'),
        strict: this.enabled('strict routing')
      });
      this._router.use(query(this.get('query parser fn')));
      this._router.use(initHttp2Express(this));
    }
  };

  const app = function (req, res, next) {
    app.handle(req, res, next);
  };

  // Copying properties and descriptors from EventEmitter.prototype to app.
  Object.getOwnPropertyNames(EventEmitter.prototype).forEach((key) => {
    const descriptor = Object.getOwnPropertyDescriptor(EventEmitter.prototype, key);
    if (descriptor) {
      Object.defineProperty(app, key, descriptor);
    }
  });

  // Copy symbols from EventEmitter.prototype to app.
  Object.getOwnPropertySymbols(EventEmitter.prototype).forEach((symbol) => {
    const descriptor = Object.getOwnPropertyDescriptor(EventEmitter.prototype, symbol);
    if (descriptor) {
      Object.defineProperty(app, symbol, descriptor);
    }
  });

  // Copying properties from application to app.
  Object.getOwnPropertyNames(application).forEach((key) => {
    const descriptor = Object.getOwnPropertyDescriptor(application, key);
    if (descriptor) {
      Object.defineProperty(app, key, descriptor);
    }
  });

  // Copy symbols from application to app.
  Object.getOwnPropertySymbols(application).forEach((symbol) => {
    const descriptor = Object.getOwnPropertyDescriptor(application, symbol);
    if (descriptor) {
      Object.defineProperty(app, symbol, descriptor);
    }
  });

  response.push = () => {};

  // Expose the prototype that will get set on requests.
  app.request = Object.create(request, {
    app: {
      configurable: true,
      enumerable: true,
      writable: true,
      value: app
    }
  });

  // Expose the prototype that will get set on responses.
  app.response = Object.create(response, {
    app: {
      configurable: true,
      enumerable: true,
      writable: true,
      value: app
    }
  });

  const http2Request = createHttp2Request(request);
  const http2Response = createHttp2Response(response);

  app.http2Request = Object.create(http2Request, {
    app: {
      configurable: true,
      enumerable: true,
      writable: true,
      value: app
    }
  });

  app.http2Response = Object.create(http2Response, {
    app: {
      configurable: true,
      enumerable: true,
      writable: true,
      value: app
    }
  });
  app.init();
  return app;
};

module.exports = createHttp2Express;