使用nodejs tcp服务器接收客户端数据

我想从正在向我的服务器发送数据的客户端接收数据。 这是我的代码，将传入的数据插入msql

var net = require('net'); var mysql = require('mysql'); var randomstring = require("randomstring"); var server = net.createServer(function(socket) { socket.write('Echo server\r\n'); socket.pipe(socket); }); socket.on('data', function (data) { var connection = mysql.createConnection({ host : 'seizedserver.com', user : 'federal', password : '123456', database : 'hanging_tree' }); connection.connect(); /* connection.query('SELECT data from gps', function(err, rows) { if (err) throw err; console.log('The solution is: ', rows[0]); }); */ var post = {data: data}; var query = connection.query('INSERT INTO gps SET ?', post, function(err, result) { }); console.log(query.sql); connection.end(); }); server.listen(1337, '127.0.0.1'); 

计划是将传入的数据插入到我创build的MySQL表中，但我不确定我是否正确使用数据事件。

我正确使用数据事件？

我得到这个错误，当我永远运行我的脚本

 /var/www/html/server.js:9 socket.on('data', function (data) { ^ ReferenceError: socket is not defined at Object.<anonymous> (/var/www/html/server.js:9:2) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:902:3 error: Forever detected script exited with code: 8 

Answer 1

socket只在服务器的callback中定义：

 var server = net.createServer(function(socket) { socket.write('Echo server\r\n'); socket.pipe(socket); }); // socket is undefined here socket.on('data', function (data) { var connection = mysql.createConnection({ host : 'seizedserver.com', user : 'federal', password : '123456', database : 'hanging_tree' }); 

应该：

 var server = net.createServer(function(socket) { socket.write('Echo server\r\n'); // socket is defined here and in scope socket.on('data', function (data) { var connection = mysql.createConnection({ host : 'seizedserver.com', user : 'federal', password : '123456', database : 'hanging_tree' }); socket.pipe(socket); });