pub trait Handler {
    type RequestData;

    fn extract_request_data(
        &mut self,
        request: &impl ReadableMessage
    ) -> Self::RequestData; fn estimate_length(&mut self, request: &Self::RequestData) -> usize; fn build_response(
        &mut self,
        response: &mut impl MutableWritableMessage,
        request: Self::RequestData
    ); }
Expand description

A CoAP request handler. This gets called by a CoAP server implementation that the handler is assigned to; the server has the handler digest the request’s data into a RequestData structure, possibly calls estimate_length before allocating a response message, and then asks the handler to populate the allocated response message with data persisted in the RequestData structure.

Required Associated Types

Required Methods

Implementations on Foreign Types

An easy way to have resources that may or may not be there in a tree, considering that Handler is not object safe and thus, if let Some(x) { all = won’t work.

This returns 4.04 Not Found if the inner handler is absent, and otherwise forwards request and response building.