@fnet/node-express

@fnet/node-express is a robust web server application built using the Node.js and Express.js frameworks, primarily designed for handling HTTP requests and providing a stable and secure environment for building web-based services. Here's a comprehensive overview of its main purpose and functionality from an end-user perspective:

Main Purpose

The main purpose of this project is to set up a highly customizable and secure web server that can serve various web services and APIs. By leveraging several middleware components and configurations, this server aims to provide robust features such as secure session management, request parsing, Cross-Origin Resource Sharing (CORS) support, and security enhancements.

Key Features and Functionalities

• Query Parsing: The server is configured to parse incoming query parameters deeply, allowing for complex nested queries to be handled effectively.

• CORS Configuration: A flexible CORS setup ensures that the server can handle requests from different origins while adhering to a whitelist of allowed domains. This is crucial for enabling safe cross-origin requests in a controlled manner.

• Session Management: The server manages user sessions securely. It preferentially uses Redis for session storage, ensuring efficient and scalable session management. As a fallback, it can switch to in-memory session storage if Redis is unavailable.

• Enhanced Security: Utilizing helmet, the server is fortified with several security headers to protect against common vulnerabilities like XSS, Clickjacking, etc. Security policies such as Content Security Policy (CSP) and others can be dynamically set based on the environment.

• Request IP Logging: The server logs incoming request IPs, which can be essential for security auditing and analytics.

• Health Check Endpoint: A /healthz endpoint is provided to quickly check the server's health status, returning 'ok' when the server is up and running. This is useful for monitoring and automated health checks.

• JSON Body Parsing: Incoming JSON payloads are parsed with a specific size limit, ensuring the server doesn't get overwhelmed by large payloads and can handle JSON data effectively.

• Scalable Middleware Integration: The server supports dynamic loading of additional APIs and middleware, making it highly extensible. These additional functionalities can be loaded at runtime and made ready as the server starts.

Customization

The server is highly customizable via environment variables and passed arguments, making it adaptable to different deployment environments and requirements. Users can set various aspects such as server port, CORS settings, session configurations, and security policies, either through configuration files or environment