Request Handler

The Request Handler is a core component of the API Interface Layer responsible for managing the lifecycle of incoming API requests. It acts as the initial point of contact, receiving requests from clients, performing necessary validation, authentication, and parsing, and then routing them to the appropriate internal business logic or service components for further processing. It also handles the assembly and return of responses to the client.

The Request Handler operates by listening on a designated network endpoint (e.g., a specific URL path). Upon receiving an HTTP/HTTPS request, it first validates the request structure, headers, and payload against defined schemas. It then authenticates and authorizes the client based on security protocols (e.g., API keys, tokens). After successful validation, it parses the request to extract parameters and data, maps the request to a specific internal function or service call, and invokes the corresponding logic. Finally, it receives the result from the business logic, formats it into the appropriate response (e.g., JSON, XML), and sends it back to the client with the correct HTTP status code.