ReXUWS

ReXUWS - Replace Express by uWS - A simple express-like framework built on top of uWebsockets.js

Usage

npm i rexuws

Create the server

import rex from 'rexuws';
import { IRequest, IResponse } from './lib/utils/types';

const app = rex();

app.get('/hi', (req: IRequest, res: IResponse) => {
  res.send('hi');
});

app.listen(3000);

Configuration rex(options: TReXAppOptions)

• forceAsync: Attach abort handler to all routes. Should be TRUE when compiling to ES5 (which lacks of Promise/Async/Await), default: FALSE

• name: Set up application's name in ReX container, default: 0, 1, 2, ...

• logging: Control how the message gets printed over console's method such as log, error, info, warn, trace.

• useDefaultParser: Apply some bultin parsers (bodyParser, multipartParser) on POST/PATCH/PUT routes and cookieParser on all endpoints. When configured over application's instanciation, these middlewares will be executed before all user's defined middlewares. If TRUE (default) enable bodyParser (to parse application/json, application/x-www-form-urlencoded, text/*) and cookieParser. To enable multipartParser on all POST/PUT/PATCH routes, you have to specify in useDefaultParser setting. ex:

const app = rex({
  useDefaultParser: {
    bodyParser: true,
    cookieParser: true,
    multipartParser: true,
  },
});

• uWSConfigurations: uWebsockets Templated App options (see: https://github.com/uNetworking/uWebSockets.js/). Can be used to create a SSL App, ex:

const app = rex({
  uWSConfigurations: {
    key_file_name: 'misc/key.pem',
    cert_file_name: 'misc/cert.pem',
    passphrase: '1234',
  },
});

• preferJSON: if TRUE return application/json in default errorMiddleware and notFoundMiddleware else return text/html. Default FALSE

Supported HTTP methods

• GET
• POST
• PATCH
• PUT
• DELETE
• HEAD
• TRACE
• OPTIONS
• CONNECT
• ANY
• ALL (alias of ANY)

Examples

• Basic routing

import rex from 'rexuws';

const app = rex({
  useDefaultParser: true,
});

app.get('/', (req, res) => {
  res.end('ok');
});

app.post('/', (req, res) => {
  res.end('post ok');
});

app.get('/user/:id', (req, res) => {
  res.end(`Your id is ${req.params.id}`);
});

// chaining
app
  .get('/async', async (req, res) => {
    res.json({
      message: 'ok',
    });
  })
  .post('/signIn', (req, res) => {
    res.json(req.body);
  })
  .listen('0.0.0.0', 3001);

Router

import rex, { Router } from '../../index';

const router = Router()
  .get('/helloworld', (req, res) => {
    res.end('ok');
  })
  .get(
    '/users/:id',
    (req, res, next) => {
      next();
    },
    (req, res) => {
      res.end('ok');
    }
  );

app.use('/api', router);

Prefix Router

import rex, { Router } from '../../index';

const app = rex();

const prefixRouter = Router()
  .route('/user')
  .get((req, res) => {
    res.end('ok');
  })
  .post(
    (req, res, next) => {
      next();
    },
    (req, res) => {
      res.end('ok');
    }
  );

app.use('/api', preFixRouter);

Global middlewares

app.use((req, res, next) => {
  next();
});

Global Error middlewares

app.use((err, req, res, next) => {
  next();
});

Route middlewares

app.get(
  '/user',
  (req, res, next) => {
    next();
  },
  (req, res) => {
    res.end();
  }
);

// Send to ErrorMiddleware
app.get('/error', (req, res, next) => {
  next('Something went wrong');
});

Native Routing

This library only aims at providing a wrapper around Http Routes. If you want to use uWebsockets WebSocket feature, or would like to access raw uWebSockets.js usage, you can use app.useNativeHandlers((uws: TemplatedApp) => void)

There is a implementation of ReXUWS with NestJS which has a compatible Websocket Adapter, scroll down to the bottom of the page for detail.

app.useNativeHandlers((uws: TemplatedApp) => {
  uws
    .ws('/somepath', {
      // ws handlers
    })
    .get('/hello', (res: uws.HttpResponse, req: uws.HttpRequest) => {
      res.end();
    });
});

Start the server

app.listen(port: number);
app.listen(port: number, callback: () => void)
app.listen(host: string, port: number)
app.listen(host: string, port: number, callback: () => void)

// example
app.listen('localhost', 3030, () => {
  console.log('Listening on 3030');
})

Stop the server

app.close();
app.close(cb: () => void);

// example
app.close(() => {
  console.log('Bye!');
})

Request Object

Interface:

import { IRequest } from 'rexuws/build/lib/utils/types';

Methods:

• accepts()
• acceptsCharsets()
• acceptsEncodings()
• acceptLanguages()
• get(): get spefic header value, ex:

app.get('/users', (req, res) => {
  res.send(req.get('content-type'));
});

• header(): alias of get()
• is()

Properties:

• body: request body, if there is no posted body, req.body is undefined. Without any related parser, req.body is a Buffer
• cookies: Without any related parsers, cookies is a string
• headers: an object of all request's headers
• hostname: parse the "Host" header field hostname.
• ip: return the remote address
• ips: parse the "X-Forwarded-For" ip address list.
• method: request method (useful when using app.any(), app.all())
• params: parse the request params, ex:

// GET /users/alice/friends/bob
app.get('/users/:username/friends/:friendName', (req, res) => {
  console.log(req.params.username); // alice
  console.log(req.params.friendName); // bob
  res.end();
});

• query: parse the request query

// GET /feeds?limit=5&skip=10
app.get('/users/:username/friends/:friendName', (req, res) => {
  console.log(req.query); // { limit: '5', skip: '10' }
  res.end();
});

• raw: posted body as Buffer
• originalReq: Original uWebsockets HttpRequest Object

Response Object

Interface:

import { IResponse } from 'rexuws/build/lib/utils/types';

Methods:

• contentType(): set response content type
• cookie(): set reponse cookie (same as Express)
• end(): send string data.
• get(): get value for header's field
• getHeader(): alias of get()
• header(): set reponse's headers (same as Express)
• json(): send JSON.
• location(): set location header
• redirect(): set location header and status code 302
• render() render view (same as Express)
• send(): send body and recognize its content-type
• set(): alias of header()
• status(): set status code
• type(): alias of contentType()
• render(): render view, (see: examples)

// render view

import ejs from 'ejs';

// config view engine
app.setView('path/to/view/directory', {
  compileMethod: ejs.compile,
  extName: 'ejs',
});

app.get('/home', (req, res) => {
  res.render('Home', {
    user: {
      username: 'Adam',
      email: '[e-mail]',
    },
    today: new Date(),
  });
});

app.post('/users', (req: IRequest, res: IResponse) => {
  res
    .status(200)
    .type('application/json')
    .cookie('sid', '12345', {
      path: '/',
      httpOnly: true,
    })
    .set('X-Custom', '12345')
    .send('ok');
});

Warning: Unstable methods:

• download(): Transfer the file at the given path as an attachment.

app.get('/download', (req: IRequest, res: IResponse) => {
  res.download('/path/to/file');
});

• sendFile(): send file at the given path

app.get('/send-file', (req, res) => {
  res.sendFile('/path/to/file', options?:IResponseSendFileOption, callback?: (err: any) => void );
});

Bultin-middlewares

Usage

import { middlewares } from 'rexuws';

Middleware	Descripton	Default
bodyParser	Parse application/json, text/*, application/x-www-form-urlencoded	enabled
errorMiddleware	Simple handler for next(err)	enabled
notFoundMiddleware	Return text/html; application/json 404 for unregistered path	enabled (*)
httpLogger	Simple HTTP logger	disabled
StaticServer	Serve static contents	disabled

(*) notFoundMiddleware is enabled by default if ANY /* hasn't been registered

Serve static files

import path from 'path';
import rex, { getLoggerInstance, middlewares } from 'rexuws';

async function bootstrap() {
  const app = rex({
    logging: {
      level: true,
    },
  });

  middlewares.StaticServer.Config({ watcher: true }, getLoggerInstance());

  /**
   * Init a StaticStore for selected directory
   */
  await new middlewares.StaticServer(path.join(__dirname, './public')).init();

  const router = middlewares.StaticServer.GetRouter();

  app.use('/docs', router);

  app.listen(3000);
}

bootstrap();

NestJS Integration (experimental)

Usage

Create a new NestJS Project (see: NestJS) then install these packages

npm i rexuws @rexuws/nestjs @nestjs/websockets

TODO

• Update docs
• Full tests