Knowee
Questions
Features
Study Tools

const net = require('net');  var server = net.createServer((socket) => {    socket.end('goodbye\n');  }).on('error', (err) => {    // handle errors here    throw err;  });  // grab a random port.  server.listen(() => {    address = server.address();    console.log('opened server on %j', address);  });

Question

Code Example

const net = require('net');  
var server = net.createServer((socket) => {  
    socket.end('goodbye\n');  
}).on('error', (err) => {  
    // handle errors here  
    throw err;  
});  

// grab a random port.  
server.listen(() => {  
    address = server.address();  
    console.log('opened server on %j', address);  
});
🧐 Not the exact question you are looking for?Go ask a question

Solution

The given code is written in JavaScript. It creates a TCP server using the 'net' module. Here are the steps to understand the code:

  1. Import the 'net' module using the 'require' function.
  2. Create a server using the 'net.createServer()' method. This method takes a callback function as an argument, which will be executed whenever a client connects to the server.
  3. Inside the callback function, the 'socket' object represents the connection between the server and the client. In this code, the server immediately ends the connection by sending the string 'goodbye\n' to the client using the 'socket.end()' method.
  4. The server also listens for any errors that may occur during the connection using the 'server.on()' method. If an error occurs, it throws the error.
  5. The server is set to listen on a random available port using the 'server.listen()' method. This method takes a callback function as an argument, which will be executed once the server starts listening.
  6. Inside the callback function, the 'server.address()' method is used to get the address (IP address and port number) on which the server is listening.
  7. Finally, the address is logged to the console using the 'console.log()' method.

Please note that this code snippet does not explicitly specify the port number on which the server should listen. Instead, it will automatically assign a random available port.

This problem has been solved

Similar Questions

const net = require('net');  const client = net.connect({port: 50302}, () => {//use same port of server    console.log('connected to server!');    client.write('world!\r\n');  });  client.on('data', (data) => {    console.log(data.toString());    client.end();  });  client.on('end', () => {    console.log('disconnected from server');  });

How do you start a server listening on port 3000 in Express?app.start(3000, () => { console.log('Server running'); })app.run(3000, () => { console.log('Server running'); })app.listen(3000, () => { console.log('Server running'); })app.launch(3000, () => { console.log('Server running'); })

Which line of code starts the server listening on the specified port?config.portportapp.listen(port, () => {...})console.log(`Server is running on port ${port}`)

How do you start an Express server and listen on a specific port?app.run(port)app.listen(port)app.start(port)app.init(port)

4. Create a small HTTP server using Node's HTTP modulemandatoryScore: 0.0% (Checks completed: 0.0%)In a file named 4-http.js, create a small HTTP server using the http module:It should be assigned to the variable app and this one must be exportedHTTP server should listen on port 1245Displays Hello Holberton School! in the page body for any endpoint as plain textIn terminal 1:

1/2

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.