nodejs---web静态服务器

server.js

'use strict';


const http = require('http');
const url = require('url');
const fs = require('fs');
const path = require('path');


//default config
let config = {
  ip: '0.0.0.0',
  port: 4000,
  defaultDirectory: process.cwd() + '/public'
}





const server = http.createServer();



initConfig();


// listen request
server.on('request', (req, res) => {
  let urlpath = url.parse(req.url);
  let pathname = decodeURIComponent(urlpath.pathname);

  //default index.html
  if (pathname === "/") pathname += "index.html";
  //get full path
  let fullPath = path.join(config.defaultDirectory, pathname);
  fs.exists(fullPath, (exists) => {
    if (exists) {
      fs.readFile(fullPath, (err, data) => {
        if (err) {
          res.statusCode = 500;
          res.statusMessage = 'Internal Server Error';
          res.write('Internal Server Error');
          res.end();

        } else {
          res.writeHead(200, {
            'content-type': getMimeType(fullPath)
          });
          res.write(data);
          res.end();
        }
      })
    } else {
      res.statusCode = 404;
      res.statusMessage = 'Not found';
      res.write('file Not found');
      res.end();
    }
  })


  // get MimiType by file path
  function getMimeType(file) {
    let i = file.lastIndexOf("."),
      ext = (i === -1) ? "default" : file.substr(i),
      mimeTypes = {
        ".bmp": "image/bmp",
        ".css": "text/css",
        ".gif": "image/gif",
        ".htm": "text/html",
        ".html": "text/html",
        ".jpg": "image/jpeg",
        ".jpeg": "image/jpeg",
        ".js": "application/javascript",
        ".json": "application/json",
        ".otf": "font/opentype",
        ".png": "image/png",
        ".text": "text/plain",
        "default": "application/octet-stream"
      };
    return mimeTypes[ext.toLowerCase()];
  }


})


// get start-up parameters
//but process.argv is 2 start
function initConfig() {
  let array = process.argv;
  for (var i = 2; i < array.length; i += 2) {
    switch (array[i]) {
      case '-d':
        config.defaultDirectory = (array[i + 1] === undefined ? config.defaultDirectory : array[i + 1]);
        break;
      case '-p':
        config.port = (array[i + 1] === undefined ? config.port : array[i + 1]);
        break;
      case '-h':
        config.ip = (array[i + 1] === undefined ? config.ip : array[i + 1]);
        break;
      case '-help':
        usage();
        process.exit();
        break;
      default:
        break;
    }
  }
}

/*

 usage
 print help

*/

function usage() {
  let SWITCHES = [
    '-d appoint this directory to listen to',
    '-p port to listen on',
    '-h this ip to setting',
    '-help show this help screen'
  ];
  SWITCHES.forEach(elem => {
    // body...
      process.stdout.write(elem+"\n");
    //console.log(elem);
  });


}



//start listen
server.listen(config.port, config.ip, () => {

  console.log(`${config.ip}:${config.port} start`);

})

使用方法

node server.js

参数
*　-d 目录 默认 public

• -p 端口 默认 4000
• h ip 默认 0.0.0.0
• -help 帮助

例如
node server.js -d ./public01

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