Qaaj

// This function will return a promise that will fetch data from a certain URL

function getURLPromise(url) {
  return new Promise((resolve, reject) => {
    http.get(url, (rs) => {
      var data = ''
      rs.on('data', (chunk) => data += chunk);
      rs.on('end', ()=>  resolve(data.length));
    });
  });

Qaaj

co(function* () {
  var result = yield Promise.resolve(true);
  return result;
}).then(function (value) {
  console.log(value);
}, function (err) {
  console.error(err.stack);
});

Qaaj

co(function *() {
  // yield any promise
  var a = yield getURLPromise('http://www.google.com')
  var b = yield getURLPromise('http://www.apple.com')
  var c = yield getURLPromise('http://www.microsoft.com')

  debug([a, b, c]);
}).catch((error) =>{
  debug("Something went wrong: ", error)
});

Qaaj

// User requests the /app/ route -> Check if he is authenticated
router.get('/app/', isAuthenticated, (req, res) => res.render('app') );

// The isAuthenticated function is using passport.js here to see if the user is logged in (req.isAuthenticated)
// It that's not the case, we redirect them to the login route.
const isAuthenticated = (req, res, next) => {
  if(req.isAuthenticated())  return next();
  res.redirect('/login');
}

Qaaj

div.login-page
  form(class='form-login', action='/web-login', method='POST')
    input(type='text', name='username', placeholder='Username',required, autofocus)
    input(type='password', name='password', placeholder='Password', required)
    input(type='hidden', id='url', name='url')
    button(class='btn', type='submit') Sign in
script(type='text/javascript').
    document.getElementById("url").value = window.location.hash;

Qaaj

// Login strategy. Enable passing through of the req object by setting passReqToCallback to true.
passport.use(new Strategy({ passReqToCallback: true },
  function (req,username, password, done) {
    let user = your_user_auth(username,password); // returns the user object if valid, otherwise null
    if(user)
      // Extract the redirect hash from the request body and store it in the request session object
      req.session.redirect_url = req.body.url;
      return done(null, user);
    }
    return done(null, false);

Qaaj

var createStructuredSelector = require('reselect').createStructuredSelector;
var createSelector = require('reselect').createSelector;

// Example of structured selector

const mySelectorA = (state) => state.first_user;
const mySelectorB = (state) => state.second_user;
const mySelectorC = (state) => state.second_user + state.first_user;

const structuredSelector = createStructuredSelector({

Qaaj

FROM node:7.8.0
ENV NPM_CONFIG_LOGLEVEL warn

WORKDIR /app

COPY package.json ./

RUN npm install
RUN npm install -g nodemon

Qaaj

version: '3'
services:
  web:
    build: .
    command: npm run dev
    ports:
      - "3001:3001"
    depends_on:
      - geth
    volumes:

Qaaj

const express = require('express');
const Web3 = require('web3');
const app = express();

const web3 = new Web3(new Web3.providers.HttpProvider("http://geth:8545"));

app.get('/', async (req, res) => res.send(`Coinbase:  ${await web3.eth.getCoinbase()}`));
app.listen(3001, () => console.log('Listening on port 3001!'));