Retrieves all headers from the request.

Retrieves the parameters from a JSON-formatted body.

Retrieves the HTTP method for the request.

Retrieves a parameter from the request.

Retrieves the parameter priority order.

Retrieves merged parameters from the request.

Retrieves parameters from the query string.

Retrieves the route that matched the request.

Retrieves parameters from the route itself.

Checks whether this request is valid according to its attributes.