nodejs初识

const http = require('http');
const hostName = '127.0.0.1';
const port = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('hello world');
})

server.listen(port, hostName, () => {
  console.log(`Server running at http://${hostName}:${port}`);
})

// index.js
const server = require("./first-serve");
const router = require("./router");
server.start(router.route);

// router.js
const route = (pathName) => {
  console.log("About to route a request for" + pathName)
}
exports.route = route;

// first-serve.js
const http = require('http');
const url = require('url');
const hostName = '127.0.0.1';
const port = 3000;

function start(route) {
  function onRequest(request, response) {
    let pathName = url.parse(request.url).pathname;
    console.log('Request for' + pathName + " received");

    route(pathName);

    response.writeHead(200, { "Content-Type": "text/plain" });
    response.write("Hello World");
    response.end();
  }
  http.createServer(onRequest).listen(port, hostName);
  console.log("Serve has started.")
}

exports.start = start;

// Request for/user received
// About to route a request for/user
// Request for/favicon.ico received
// About to route a request for/favicon.ico