node本地服务器

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 + ".");