實現一個文件服務器
var fs = require(‘fs‘);
var url = require(‘url‘);
var path = require(‘path‘);
var http = require(‘http‘);

// 從命令行參數獲取根目錄，默認為當前目錄
var root = path.resolve(process.argv[2]||‘.‘);
// 創建服務器
var server = http.createServer(function(req,res) {
    var pathname = url.parse(req.url).pathname;
    var filepath = path.join(root,pathname);
    
 
//獲取文件狀態
    fs.stat(filepath,function(err,stats){
        if(!err && stats.isFile()) {
            res.writeHead(200);
            // 將文件流導向res
            fs.createReadStream(filepath).pipe(res);
        } else {
            // 發送404響應
            res.writeHead(404);
            res.end(‘404 Not Found‘);
        }
    })
});

server.listen(
 
8080);
console.log(‘server is running at http://127.0.0.1:8080/‘);

服務器端node.js