Client-Server Application

Table of contents

• overview
• System_Requirements
• Features
• Getting_Started
• Known_issues
• Author

overview

This application allows client to connect to a TCP server, send commands to the server and then the server distributes the commands to lower rank clients for execution

System_Requirements

• python3
• threading

Features

server

• accepts client
• accepts clients commands if a client is not rhe lowest in rank
• distributes commands to lower rank clients
• handles disconnection of clients and re-adjusts

client

• connects to the server
• send commands to the server
• excecutes commands from the server

implementation

This project implements a server that exposes a tcp socket where clients can connect and send data.clients can send commands without blocking each other my using python multithreding to achieve concurrency and handle each client on separate thread.

Getting_started

installing and running the project

on your local terminal:

1. clone the project

$ git clone git@github.com:Bkaraba/TCP-client_server_app.git

2. navigate to the project directory

$ cd TCP-client_server_app

3. • install python3
   • install required packages: sockets and threading

pip install sockets
pip install threading

4. run the server run the server that accepts 10 connections

$ python3 server.py 10

output

[STARTING] Listening for 10 clients...
Accepted client ('127.0.0.1', 47036)
socket ('127.0.0.1', 47036) has rank number 0
Accepted client ('127.0.0.1', 49910)
socket ('127.0.0.1', 47036) has rank number 0
socket ('127.0.0.1', 49910) has rank number 1
Accepted client ('127.0.0.1', 54500)
socket ('127.0.0.1', 47036) has rank number 0
socket ('127.0.0.1', 49910) has rank number 1
socket ('127.0.0.1', 54500) has rank number 2
Accepted client ('127.0.0.1', 34630)
socket ('127.0.0.1', 47036) has rank number 0
socket ('127.0.0.1', 49910) has rank number 1
socket ('127.0.0.1', 54500) has rank number 2
socket ('127.0.0.1', 34630) has rank number 3
Accepted client ('127.0.0.1', 34640)
socket ('127.0.0.1', 47036) has rank number 0
socket ('127.0.0.1', 49910) has rank number 1
socket ('127.0.0.1', 54500) has rank number 2
socket ('127.0.0.1', 34630) has rank number 3
socket ('127.0.0.1', 34640) has rank number 4

5. run the client(s) open a new terminal window and run a new client there

python3 client.py

output

Assigned rank: 0
Enter command: print

Assigned rank: 1
Enter command: 
[Processing]......
[Received] received command print from server:
[Executing] i am printing watch me print

Enter command: 
debug 
Enter command: 

Assigned rank: 2
Enter command: 
[Processing]......
[Received] received command debug from server:
[Executing] i am debuging watch me debug

Enter command: 

on disconnecting

[Disconnect]  socket ('127.0.0.1', 41378) has disconnected
[New ranking]
socket ('127.0.0.1', 33300) has rank number 0
socket ('127.0.0.1', 33316) has rank number 1
[Disconnect]  socket ('127.0.0.1', 33316) has disconnected
[New ranking]
socket ('127.0.0.1', 33300) has rank number 0
[Disconnect]  socket ('127.0.0.1', 33300) has disconnected
[New ranking]
0 connections

Known_issues

• The server sends the command for execution to the immediate lower ranked client.I will be implementing a way to distribute commands to clients with lower load in the next iteration

Author

• Bernard Karaba
• bkaraba14@gmail.com
• portfolio