nodejs搭建本地http服务器教程

var PORT = 3000;

var http = require('http');
var url=require('url');
var fs=require('fs');
var mine=require('./mine').types;
var path=require('path');

var server = http.createServer(function (request, response) {
  var pathname = url.parse(request.url).pathname;
  var realPath = path.join("assets", pathname);
  //console.log(realPath);
  var ext = path.extname(realPath);
  ext = ext ? ext.slice(1) : 'unknown';
  fs.exists(realPath, function (exists) {
    if (!exists) {
      response.writeHead(404, {
        'Content-Type': 'text/plain'
      });

      response.write("This request URL " + pathname + " was not found on this server.");
      response.end();
    } else {
      fs.readFile(realPath, "binary", function (err, file) {
        if (err) {
          response.writeHead(500, {
            'Content-Type': 'text/plain'
          });
          response.end(err);
        } else {
          var contentType = mine[ext] || "text/plain";
          response.writeHead(200, {
            'Content-Type': contentType
          });
          response.write(file, "binary");
          response.end();
        }
      });
    }
  });
});
server.listen(PORT);
console.log("Server runing at port: " + PORT + ".");

exports.types = {
 "css": "text/css",
 "gif": "image/gif",
 "html": "text/html",
 "ico": "image/x-icon",
 "jpeg": "image/jpeg",
 "jpg": "image/jpeg",
 "js": "text/javascript",
 "json": "application/json",
 "pdf": "application/pdf",
 "png": "image/png",
 "svg": "image/svg+xml",
 "swf": "application/x-shockwave-flash",
 "tiff": "image/tiff",
 "txt": "text/plain",
 "wav": "audio/x-wav",
 "wma": "audio/x-ms-wma",
 "wmv": "video/x-ms-wmv",
 "xml": "text/xml"
};