Online-Judge | Online-Coding-Platform | (MERN-Based Website)

• Build a platform that remotely runs and compiles user submitted code for a programming problem securely and judges if the code is correct/wrong
• Provided access to users to keep track of submitted code by maintaining Leaderboard and history of submissions
• Used Docker and Sandboxing techniques to make online judge more secure
• Used Poling and Queue to handle multiple requests
• Designed for future Horizontal Scaling (currently optimized for single-host deployment)

Run Online-Judge Locally

• Navigate to client directory and install all dependencies for client side code using command : npm install and then run npm start to run react on PORT 3000
• Navigate to the server directory and install the dependencies using the command npm install
• To run the server you must have Docker and Redis version greater than or equal to 2.8.18 installed on your PC
• If you are using Windows, install WSL for using redis-server and use Docker-Desktop for using Docker
• Server also uses MongoDB, either you can use mongodb-local or mongodb-atlas
• To use mongodb-atlas create a .env file and define a key named DB_URL and its value will be your atlas URL. To use mongodb-local no need to define DB_URL in .env
• Server uses cookies to handle authentication, which uses JWT_SECRET which is also defined in the .env file
• After all these steps you are all set to run the server. Use the command npm start. The server will start on PORT 5000