Struct ServerPropagator 

pub struct ServerPropagator { /* private fields */ }

Server-side CallInterceptor that extracts extension-related metadata and headers from incoming requests.

The extracted data is stored in a PropagatorContext via task_local. The handler must be wrapped in init_propagation for this to work. ClientPropagator reads the stored context when making downstream calls.

Aligned with Go’s a2aext.NewServerPropagator.

Implementations

impl ServerPropagator

pub fn new() -> Self

Creates a new server propagator with default configuration.

Default behavior:

• Propagates metadata keys matching client-requested extension URIs
• Propagates the x-a2a-extensions header

pub fn with_config(config: ServerPropagatorConfig) -> Self

Creates a new server propagator with custom configuration.

Trait Implementations

impl CallInterceptor for ServerPropagator

fn before<'a>( &'a self, ctx: &'a mut CallContext, req: &'a mut Request, ) -> Pin<Box<dyn Future<Output = Result<(), A2AError>> + Send + 'a>>

Called before the handler method. Can observe, modify, or reject a request.

fn after<'a>( &'a self, _ctx: &'a CallContext, _resp: &'a mut Response, ) -> Pin<Box<dyn Future<Output = Result<(), A2AError>> + Send + 'a>>

Called after the handler method. Can observe, modify, or override a response.

impl Debug for ServerPropagator

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

Formats the value using the given formatter.

impl Default for ServerPropagator

fn default() -> Self

Returns the “default value” for a type.