HTTP Request

Table of contents

  1. Internet
  2. Server
  3. Model-View-Controller (MVC)
  4. Interaction and Data Flow
  5. Database

HTTP Request Figure 1: HTTP Request.

The Figure 1 shows an HTTP request in uvlhub using the Flask framework, organizing the code in a Model-View-Controller (MVC) pattern.

Internet

The application is accessible through the internet.

Server

A Flask server handles web requests and responses.

Model-View-Controller (MVC)

Each module in uvlhub has a series of folders and files to handle HTTP requests separating responsibility as indicated:

  • Model. Represents the data and business logic of the application.
    • models.py: Defines the data structures and database interactions.
    • repositories.py: Implements functions to access and manipulate the data stored in the models.
    • forms.py: Defines forms and data validations that users can submit.
  • View. Represents the user interface.
    • templates: Contains the Jinja templates to generate the user interface.
  • Controller. Handles the application logic and the communication between the model and the view.
    • routes.py: Defines the application routes, handling HTTP requests and determining which view should be rendered.
    • services.py: Implements the business logic and operations that belong neither to the model nor to the view.

Interaction and Data Flow

  • Requests come to the Flask server from the Internet.
  • The server redirects these requests to routes.py.
  • routes.py can call services.py to perform business operations.
  • services.py interacts with repositories.py to access data from models.py and the database.
  • forms.py and templates are used to handle user input and generate the visual response that is sent back to the user through the Flask server.

Database

  • The database stores the persistent information of the application.
  • models.py defines how this information is structured and accessed.

This architecture facilitates the separation of concerns, making the code more modular and easier to maintain. Each component has a clear and distinct responsibility, which improves the organization and scalability of the application.