What is a socket server, and how do you create one in Python?

Introduction

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Understanding Socket Servers

A socket server, in the context of computer networking, is a software component that listens for incoming network connections, processes those connections, and provides services or resources to clients over a network. It's a fundamental building block for many network applications, including web servers, chat applications, and more.

Creating a Socket Server in Python

Here's a step-by-step guide to creating a socket server in Python, which is an essential topic covered in Python Training:

1. Import Necessary Modules: To create a socket server, you'll need to import Python's socket module.

   python

• import socket

• Create a Socket Object: Next, you'll create a socket object that will represent your server. You can choose between different socket types, but for a basic server, you can use a stream socket (typically a TCP socket).

  python
• server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

• Bind the Socket: You need to bind the socket to a specific IP address and port on your host machine.

  python
• host = '127.0.0.1' # Use your desired host IP port = 8080 # Choose an available port server_socket.bind((host, port))

• Listen for Connections: Start listening for incoming client connections. You can specify the maximum number of queued connections.

  python
• server_socket.listen(5)

• Accept Client Connections: In a loop, accept incoming connections from clients. This will create a new socket for each client.

  python
• while True: client_socket, addr = server_socket.accept() print(f"Connected by {addr}")

• Handle Client Data: Once a connection is established, you can send and receive data from the client using the client_socket object. You can define your server's logic to respond to client requests.

• Close Sockets: Don't forget to close the client and server sockets when you're done.

  python

7. client_socket.close() server_socket.close()

Conclusion

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