Node.js HTTP文件

var http = require("http"); 
var fs = require("fs"); 
//from o2fo.com
function send404(response) { 
    response.writeHead(404, { "Content-Type": "text/plain" }); 
    response.write("Error 404: Resource not found."); 
    response.end(); 
} 

var server = http.createServer(function (req, res) { 
    if (req.method == "GET" && req.url == "/") { 
        res.writeHead(200, { "content-type": "text/html" }); 
        fs.createReadStream("./public/index.html").pipe(res); 
    } else { 
        send404(res); 
    } 
}).listen(3000); 

console.log("server running on port 3000"); 

var http = require("http"); 
var fs = require("fs"); 
var path = require("path"); 
//  o2fo.com
function send404(response) { 
    response.writeHead(404, { "Content-Type": "text/plain" }); 
    response.write("Error 404: Resource not found."); 
    response.end(); 
} 

var mimeLookup = { 
    ".js": "application/javascript", 
    ".html": "text/html" 
}; 

var server = http.createServer(function (req, res) {
    if (req.method == "GET") { 
         var fileurl; 
        if (req.url == "/") 
           fileurl = "/index.html"; 
        else 
           fileurl = req.url; 
        var filepath = path.resolve("./public" + fileurl); 

        var fileExt = path.extname(filepath); 
        var mimeType = mimeLookup[fileExt]; 
        if (!mimeType) { 
            send404(res); 
            return;
        }
        fs.exists(filepath, function (exists) {
            if (!exists) {
                send404(res); 
                return; 
            };
            res.writeHead(200, { "content-type": mimeType }); 
            fs.createReadStream(filepath).pipe(res);
         }); 
     } else {
         send404(res);
     } 
}).listen(3000); 

console.log("server running on port 3000");