This document discusses client-server communication using TCP in Python. It introduces sockets as endpoints for bidirectional communication between clients and servers. The objectives are to develop secure client-server communication within a network using full duplex communication. The methodology uses socket programming and multithreading - threads are created for each client to allow independent communication through individual sockets. The server script establishes a socket bound to a port, while the client script connects to the server socket. Future scopes include adding a database, frontend, and internet hosting to create a real-time chat application, or including more graphical interfaces.

1. CLIENT SERVER COMMUNICATION
USING TCP IN PYTHON
-Vandana Garia
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2. CONTENTS
01 INTRODUCTION
02 OBJECTIVES
03 METHODOLOGY
O4 WORK-FLOW
DIAGRAM
05 FUTURE SCOPE
06 REFERENCES
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3. 01 INTRODUCTION
1.1 Socket programming is a way of connecting two nodes on a
network to communicate with each other. One socket(node) listens
on a particular port at an IP, while the other socket reaches out to the
other to form a connection. A socket is one endpoint of a two
way communication link between two programs running on the
network. The socket mechanism provides a means of inter-process
communication (IPC) by establishing named contact points between
which the communication takes place.
1.2 Socket are generally employed in client server applications. The
server creates a socket, attaches it to a network port addresses then
waits for the client to contact it. The client creates a socket and then
attempts to connect to the server socket. When the connection is
established, transfer of data takes place.The server forms the listener
socket while the client reaches out to the server.
They are the real backbones behind web browsing. In simpler terms,
there is a server and a client.
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4. 1.3 A server is a software that waits for client requests and serves or
processes them accordingly. A server is a program that runs on the
remote machine providing services to the clients.
1.4 A client is requester of this service. A client is a program that runs
on the local machine requesting service from the server. A client
program request for some resources to the server and server
responds to that request.
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5. 02 OBJECTIVES
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2.1 The main purpose of this project is to develop a secure Server Client
communication in same network.
2.2 To establish two way communication(Full Duplex).

6. 03 METHODOLOGY
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3.1 Socket programming
Sockets can be thought of as endpoints in a communication channel that is bi-
directional, and establishes communication between a server and one or more
clients. Here, we set up a socket on each end and allow a client to interact with other
clients via the server. The socket on the server side associates itself with some
hardware port on the server side. Any client that has a socket associated with the
same port can communicate with the server socket

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3.2 Multi-Threading
A thread is sub process that runs a set of commands individually of any other thread.
So, every time client connects to the server, a separate thread is created for every
instance and communication from server to client takes place along individual threads
based on socket objects created for the sake of identity of each client.
We will require two scripts to establish this communication. One to keep the serving
running, and another that client should run in order to connect to the server.

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3.3 Server Side Script
The server side script will attempt to establish a socket and bind it to an IP address
and port specified by the user .
3.4 Client Side Server
The client side script will simply attempt to access the server socket created at the
specified IP address and port.

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SERVER AND CLIENT CHATBOX

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04 WORK-FLOW DIAGRAM

11. 05 FUTURE SCOPES
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5.1 If developed further by adding a database, frontend and buying a server
place on the internet, this project can be converted into a real time chat
application.
5.2 More graphical interfaces can be added.

12. 06 REFERENCES
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6.1 https://www.tutorialspoint.com/python/python_networking.htm
6.2 https://www.geeksforgeeks.org/simple-chat-room-using-python/

13. Thank You !!