swdev:js:using_node.js [Audina Documentation]

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Using Node.js

Hello world (text mode):

const http     = require('http');
const hostname = '127.0.0.1';
const port     = 3000;
 
const server = http.createServer((req, res) => {
  res.statusCode = 200;
 
  // Text mode:
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World\n');
});
 
server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

Hello World (HTML mode):

const http     = require('http');
const hostname = '127.0.0.1';
const port     = 3000;
 
const server = http.createServer((req, res) => {
  res.statusCode = 200;
 
  // HTML mode:
  res.setHeader('Content-Type', 'text/html');
  res.write("Requested URL: " + req.url);
  res.write("<h3>Phone Logs</h3>");
  res.write("<a href='/data/report_01-02-2017.htm'>report_01-02-2017</a>");  // url of file, relative to root of http server
  res.end();
});
 
server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

Read requested files:

const http = require('http');
const fs   = require('fs');
const path = require('path');
const url  = require('url');
 
const hostname = '127.0.0.1';
const port     = 3000;
 
const server = http.createServer((req, res) => {
  res.statusCode = 200;
  // Read requested file
  fs.readFile('./data/report_01-02-2017.htm', function(err, data) {  // relative path of file
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.write(data);
    res.end();
  });
});
 
server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

Serve Homepage and subpages:

const http = require('http');
const fs   = require('fs');
const path = require('path');
const url  = require('url');
 
const hostname = '127.0.0.1';
const port = 3000;
 
const server = http.createServer((req, res) => {
  res.statusCode = 200;
 
 
 
  var q = url.parse(req.url, true);
  var filename = "." + q.pathname;
 
  switch(q.pathname) {
      case '/':
        // Serve Homepage
        res.setHeader('Content-Type', 'text/html');
        res.write("Requested URL: " + req.url);
        res.write("<h3>Phone Logs</h3>");
        //res.write("<a href='/data/report_01-02-2017.htm'>report_01-02-2017</a>");  // url of file, relative to root of http server
 
        // Read file listing
        var pth = "./data";
        fs.readdir(pth, function (err, files) {
            if (err) {
                throw err;
            }
 
            files.map(function (file) {
                return path.join(pth, file);
            }).filter(function (file) {
                //return fs.statSync(file).isFile();
                return fs.stat(file).isFile();
            }).forEach(function (file) {
                console.log("%s (%s)", file, path.extname(file));
                res.write("<pre>%s (%s)</pre>\n", file, path.extname(file));
            });
        });
 
        res.end();
        break;
 
      default:
        // Read and serve requested file, eg. '/data/report_01-02-2017.htm'
        fs.readFile(filename, function(err, data) {
            if (err) {
              res.writeHead(404, {'Content-Type': 'text/html'});
              return res.end("404 Not Found");
            }  
            res.writeHead(200, {'Content-Type': 'text/html'});
            res.write(data);
            return res.end();
        });
        break;
  }
});
 
server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

Using Node.js

References