Enum MessageFromClient

pub enum MessageFromClient {
    RequestFromClient(RequestFromClient),
    ResultFromClient(ResultFromClient),
    NotificationFromClient(NotificationFromClient),
    Error(RpcError),
}

An enum representing various types of messages that can be sent from an MCP Client. It provides a typed structure for the message payload while skipping internal details like requestId and protocol version, which are used solely by the transport layer and do not need to be exposed to the user.

Variants

RequestFromClient(RequestFromClient)

ResultFromClient(ResultFromClient)

NotificationFromClient(NotificationFromClient)

Error(RpcError)

Trait Implementations

impl Clone for MessageFromClient

fn clone(&self) -> MessageFromClient

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MessageFromClient

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl From<CallToolRequest> for MessageFromClient

fn from(value: CallToolRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<CancelledNotification> for MessageFromClient

fn from(value: CancelledNotification) -> MessageFromClient

Converts to this type from the input type.

impl From<CompleteRequest> for MessageFromClient

fn from(value: CompleteRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<CreateMessageResult> for MessageFromClient

fn from(value: CreateMessageResult) -> MessageFromClient

Converts to this type from the input type.

impl From<GetPromptRequest> for MessageFromClient

fn from(value: GetPromptRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<InitializeRequest> for MessageFromClient

fn from(value: InitializeRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<InitializedNotification> for MessageFromClient

fn from(value: InitializedNotification) -> MessageFromClient

Converts to this type from the input type.

impl From<ListPromptsRequest> for MessageFromClient

fn from(value: ListPromptsRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<ListResourceTemplatesRequest> for MessageFromClient

fn from(value: ListResourceTemplatesRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<ListResourcesRequest> for MessageFromClient

fn from(value: ListResourcesRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<ListRootsResult> for MessageFromClient

fn from(value: ListRootsResult) -> MessageFromClient

Converts to this type from the input type.

impl From<ListToolsRequest> for MessageFromClient

fn from(value: ListToolsRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<NotificationFromClient> for MessageFromClient

fn from(value: NotificationFromClient) -> MessageFromClient

Converts to this type from the input type.

impl From<PingRequest> for MessageFromClient

fn from(value: PingRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<ProgressNotification> for MessageFromClient

fn from(value: ProgressNotification) -> MessageFromClient

Converts to this type from the input type.

impl From<ReadResourceRequest> for MessageFromClient

fn from(value: ReadResourceRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<RequestFromClient> for MessageFromClient

fn from(value: RequestFromClient) -> MessageFromClient

Converts to this type from the input type.

impl From<Result> for MessageFromClient

fn from(value: Result) -> MessageFromClient

Converts to this type from the input type.

impl From<ResultFromClient> for MessageFromClient

fn from(value: ResultFromClient) -> MessageFromClient

Converts to this type from the input type.

impl From<RootsListChangedNotification> for MessageFromClient

fn from(value: RootsListChangedNotification) -> MessageFromClient

Converts to this type from the input type.

impl From<RpcError> for MessageFromClient

fn from(value: RpcError) -> MessageFromClient

Converts to this type from the input type.

impl From<SetLevelRequest> for MessageFromClient

fn from(value: SetLevelRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<SubscribeRequest> for MessageFromClient

fn from(value: SubscribeRequest) -> MessageFromClient

Converts to this type from the input type.

impl From<UnsubscribeRequest> for MessageFromClient

fn from(value: UnsubscribeRequest) -> MessageFromClient

Converts to this type from the input type.

impl FromMessage<MessageFromClient> for ClientMessage

fn from_message( message: MessageFromClient, request_id: Option<RequestId>, ) -> Result<ClientMessage, RpcError>

impl McpDispatch<ServerMessage, MessageFromClient> for MessageDispatcher<ServerMessage>

fn send<'life0, 'async_trait>( &'life0 self, message: MessageFromClient, request_id: Option<RequestId>, request_timeout: Option<Duration>, ) -> Pin<Box<dyn Future<Output = Result<Option<ServerMessage>, TransportError>> + Send + 'async_trait>>

where 'life0: 'async_trait, MessageDispatcher<ServerMessage>: 'async_trait,

Sends a message from the client to the server and awaits a response if applicable.

Serializes the MessageFromClient to JSON, writes it to the transport, and waits for a ServerMessage response if the message is a request. Notifications and responses return Ok(None).

Arguments

• message - The client message to send.
• request_id - An optional request ID (used for responses/errors, None for requests).

Returns

A TransportResult containing Some(ServerMessage) for requests with a response, or None for notifications/responses, or an error if the operation fails.

Errors

Returns a TransportError if serialization, writing, or timeout occurs.

impl McpMessage for MessageFromClient

fn is_response(&self) -> bool

fn is_request(&self) -> bool

fn is_notification(&self) -> bool

fn is_error(&self) -> bool

fn message_type(&self) -> MessageTypes

impl Serialize for MessageFromClient

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.