Express.js

🍱Framework

javascript

node

server

Build a node.js server with Express.js

How to create a basic server

server.js

var express = require('express');

module.exports = function() {
  var app = express();

  app.get('/', function(req, res) {
    res.send('Hello, world!');
  });

  app.get('/user/:user', function(req, res) {
    res.send('Page for user ' + req.params.user + ' with option ' +
      req.query.option);
  });

  return app;
};

index.js

var server = require('./server');

server().listen(3000);
console.log('Server listening on port 3000!');

Request `req` and response `res`

req: information about incoming requests
res: utilities for crafting a response
req object holds fields params and query.
- req.params.user: route parameters, e.g. users/:user
- req.query: key-value pairs in query string after url

Testing with mocha

Use superagent package to make http requests from within package

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How to create a basic server

Request req and response res

Testing with mocha

Discussion

Request `req` and response `res`