如何使用Node.js运行用JS编写的server.js

Question

i have a file with nodejs language which i found in the internet, i want to run it, but i don't know how to run it. i tryed to run with cmd command: node server.js but it not work.

file server.js

 var port = process.env.PORT || 3000; server = require('http').createServer(), io = require('socket.io').listen(server), users = {}, socks = {}; function Uid() { this.id = ++Uid.lastid; } Uid.lastid = 0; //Handle users io.sockets.on('connection', function (socket) { // Event received by new user socket.on('join', function (recv) { if (!recv.user) { socket.emit('custom_error', { message: 'User not found or invalid' }); return; } // The user already exists if (users[recv.user]) { socket.emit('custom_error', { message: 'The user '+ recv.user +' already exists' }); return; } // If there is users online, send the list of them if (Object.keys(users).length > 0) socket.emit('chat', JSON.stringify( { 'action': 'usrlist', 'user': users } )); // Set new uid uid = new Uid(); socket.user = recv.user; // Add the new data user users[socket.user] = {'uid': Uid.lastid, 'user': socket.user, 'name': recv.name, 'status': 'online'} socks[socket.user] = {'socket': socket} // Send new user is connected to everyone socket.broadcast.emit('chat', JSON.stringify( {'action': 'newuser', 'user': users[socket.user]} )); }); // Event received when user want change his status socket.on('user_status', function (recv) { users[socket.user].status = recv.status; socket.broadcast.emit('chat', JSON.stringify( {'action': 'user_status', 'user': users[socket.user]} )); }); // Event received when user is typing socket.on('user_typing', function (recv) { var id = socks[recv.user].socket.id; io.sockets.socket(id).emit('chat', JSON.stringify( {'action': 'user_typing', 'data': users[socket.user]} )); }); // Event received when user send message to another socket.on('message', function (recv) { var id = socks[recv.user].socket.id; var msg = {'msg': recv.msg, 'user': users[socket.user]}; io.sockets.socket(id).emit('chat', JSON.stringify( {'action': 'message', 'data': msg} )); }); // Event received when user has disconnected socket.on('disconnect', function () { socket.broadcast.emit('chat', JSON.stringify( {'action': 'disconnect', 'user': users[socket.user]} )); //socket.broadcast.emit('chat', JSON.stringify( {'action': 'offline', 'user': users[socket.user]} )); delete users[socket.user]; delete socks[socket.user]; }); }); //Listen to the server port server.listen(port, function () { var addr = server.address(); console.log('jquery-chat server listening and ready'); }); 

Answer 1

To execute a javascript using NodeJS you have to use the node <filename> command from the command prompt/terminal.

You're using a relative path. Change node server.js to node "/full/path/to/server.js" .

For example, if server.js is located in C:\\myserver\\server.js , then run:

node "C:\myserver\server.js"

Answer 2

You need to install socket.io . Run in terminal:

npm install socket.io