multithreaded-server

Description - This is a simple TCP client server A web server implemented in C++ on a UNIX based platform so that it can serve multiple incoming client requests concurrently with minimum CPU's usage and thread pool. Fow now it is just simple server which can post your text file on server and with get request can get you your uploaded file.

SERVER FUNCTIONING

1. Using socket(), create TCP socket.
2. Using bind(), bind the socket to server address.
3. Using listen(), put the server socket in a passive mode, where it waits for the client to approach the server to make a connection.
4. Using accept(), connection is established between client and server, and they are ready to transfer data.
5. Then this connection is passed to request queue of the server
6. One of the thread from thread pool which is not working at the time will pick the front element of the Req Queue and proceed the request.
7. Handle's cpu usage problem with thread condition variable and CPU critical section memory sharing problem with mutex lock

_HOW TO RUN the project _

For establishing a connection between client and server, first compile server.cpp in one terminal and run the programme. Now to access the server either use curl from your terminal or run the bash script of root folder

1. Compile server :g++ -pthread -o ./server/tcpServer ./server/tcpServer.cpp
2. Run server : ./server/tcpServer
3. For client : you can make get request from your web browser itself. eg. localhost:18000/
And post request: eg. curl -i -X POST localhost:18000/{file_name_to_upload_on_server}.txt/ \ -H "Content-Type: text/xml" \ --data-binary "@{file_path_from_your_machine}"
4. Or you can run the shell script also. Before running it make it exucatable. i.e sudo chmod u+x multiClients.bash

_TECH STACK USED - C++ , Socket Programming and Computer Networks and multi-threading using:

<sys/types.h>-//Defines a collection of typedef symbols and structures

<sys/socket.h>---//Declarations of socket constants, types, and functions

<netinet/in.h>---//Definitions for the internet protocol family

<arpa/inet.h>----//Definitions for internet operations

<netdb.h>--------//Definitions for network database operations

<unistd.h>-------//Definitions for standard symbolic constants and types

<pthread.h> -----//With help of this we have implemented the threads and it's functionality

FUTURE GOALS OF THE PROJECT

To transfer the secure data of file from one computer to another with the help of socket programming using client server architecture.
Implemet a event loop on server (async / io) to prevent it from attackers.

ADDITION TO THE ACM PROJECT

Designed web server that can handle concurrency effectively.
Implemented a condition variable and request queue on server to make it better for handling request in async pro.
User can upload file or can get his file on server.

_Screenshots:

Linux command to see the CPU's usage of the machine https://www.ibm.com/docs/en/linux-on-systems?topic=tools-top

Server (to post file on the server)

curl -i -X POST localhost:18000/file-name.txt/
-H "Content-Type: text/xml"
--data-binary "@{file-path}"

SrLeet03/multithreaded-server

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