This is a Flask application that uses the microservice architecture to convert mp4 files to mp3 files.

The application is divided into following microservices:

• Authentication Service: This service is responsible for user authentication and authorization. It uses JWT tokens for secure communication between the client and server.
• Gateway Service: This service acts as a reverse proxy and routes requests to the appropriate microservice. It also handles load balancing and caching.
• File Upload Service: This service is responsible for uploading files to the server. It uses Flask-Uploads to handle file uploads and stores the files in a local directory.
• File Conversion Service: This service is responsible for converting mp4 files to mp3 files. It uses the moviepy library to perform the conversion.
• File Download Service: This service is responsible for downloading the converted mp3 files. It uses Flask-Uploads to handle file downloads and serves the files from a local directory.
• Notiofication Service: This service is responsible for sending notifications to the user when the file conversion is complete. It uses RabbitMQ to send messages between the microservices.

The application is built using the following technologies:

• Flask: A lightweight web framework for Python that is used to build the microservices.
• Marshmallow: A library for object serialization and deserialization that is used to convert Python objects to JSON and vice versa.
• PostgreSQL: A relational database management system that is used to store user data for authentication and authorization.
• RabbitMQ: A message broker that is used to handle communication between the microservices. It is used to send messages between the File Upload Service and the File Conversion Service.
• MongoDB: A NoSQL database that is used to store the mp4 files and mp3 files using GridFS.
• Docker: A platform that is used to create, deploy, and run applications in containers. It is used to containerize the microservices and run them in isolated environments.
• Kubernetes: An open-source container orchestration platform that is used to automate the deployment, scaling, and management of containerized applications. It is used to manage the microservices and ensure high availability and scalability.

Architecture Diagram

• The auth and gateway services communicate in strong consistency with each other.
• The gateway service communicates with the file upload service and file conversion service in eventual consistency.
• The file upload service communicates with the file conversion service in eventual consistency using RabbitMQ.