学习了一下Nodejs和MongoDB，写了个示例程序，读取数据库中产品的列表。
var http = require("http"), mongo = require("mongodb"), events = require("events"); http.createServer(function(req, res) { var products_emitter = new events.EventEmitter(), // 创建到northwind数据库的链接。相当于use northwind db = new mongo.Db("northwind", new mongo.Server('localhost', 27017, {}), {}); var listener = function(products) { var html = [], len = products.length; html.push('<!DOCTYPE html>'); html.push('<html>'); html.push('<head>'); html.push('<title>Nodejs</title>'); html.push('</head>'); html.push('<body>'); if(len > 0) { html.push('<ul>'); for(var i = 0; i < len; i++) { html.push('<li>' + products[i].name + '</li>'); } html.push('</ul>'); } html.push('</body>'); html.push('</html>'); res.writeHead(200, "Content-Type: text/html"); res.write(html.join('')); res.end(); clearTimeout(timeout); } products_emitter.on('products', listener); var timeout = setTimeout(function() { products_emitter.emit('products', []); products_emitter.removeListener('products', listener); }, 10000); db.open(function() { // 打开名为products的表 db.collection("products", function(err, collection) { // select * from products 相当于db.products.find() collection.find(function(err, cursor) { cursor.toArray(function(err, items) { products_emitter.emit('products', items); }); }); }); }); }).listen(8000); console.log("Started"); |