libp2p-request-response 0.9.1

Generic Request/Response Protocols
Documentation
Generic request/response protocols. ## General Usage [`RequestResponse`] is a `NetworkBehaviour` that implements a generic request/response protocol or protocol family, whereby each request is sent over a new substream on a connection. `RequestResponse` is generic over the actual messages being sent, which are defined in terms of a [`RequestResponseCodec`]. Creating a request/response protocol thus amounts to providing an implementation of this trait which can then be given to [`RequestResponse::new`]. Further configuration options are available via the [`RequestResponseConfig`]. Requests are sent using [`RequestResponse::send_request`] and the responses received as [`RequestResponseMessage::Response`] via [`RequestResponseEvent::Message`]. Responses are sent using [`RequestResponse::send_response`] upon receiving a [`RequestResponseMessage::Request`] via [`RequestResponseEvent::Message`]. ## Protocol Families A single [`RequestResponse`] instance can be used with an entire protocol family that share the same request and response types. For that purpose, [`RequestResponseCodec::Protocol`] is typically instantiated with a sum type. ## Limited Protocol Support It is possible to only support inbound or outbound requests for a particular protocol. This is achieved by instantiating `RequestResponse` with protocols using [`ProtocolSupport::Inbound`] or [`ProtocolSupport::Outbound`]. Any subset of protocols of a protocol family can be configured in this way. Such protocols will not be advertised during inbound respectively outbound protocol negotiation on the substreams.