a simple http server using inner http module.

var http = require('http');
var fs = require('fs');

// 这是一个很有趣的包
require('colors');

var server = http.createServer(function(req, res) {

  if ('GET' == req.method && '/images' == req.url.substr(0, 7) && '.jpg' == req.url.substr(-4)) {
    
    console.log(req.url.red);
    console.log((__dirname + req.url).red);

    fs.stat(__dirname + req.url, function(err, stat) {
      
      if (err || ! stat.isFile()) {
        res.writeHead(404);
        res.end('Not found');
        return;
      }
  
      serve(__dirname + req.url, 'image/jpg');

    });

  } else if ('GET' == req.method && '/' == req.url) {
    
    serve(__dirname + '/index.html', 'text/html');
  
  } else {
    
    res.writeHead(404);
    res.end('Not found');
  }

  function serve(path, type) {

    console.log(path.yellow);
    console.log(type.red);
    
    res.writeHead(200, {'Content-Type': type});
    // 这个是亮点，流的管道方法，类似C++的 <<
    fs.createReadStream(path).pipe(res);
  }

}).listen(3000);