Struct CombinedHeaderProvider 

pub struct CombinedHeaderProvider { /* private fields */ }

Composes multiple HeaderProviders by fanning out their headers() calls in parallel and merging the results. On key collisions, later providers win.

Implementations

impl CombinedHeaderProvider

pub fn new(providers: Vec<Arc<dyn HeaderProvider>>) -> CombinedHeaderProvider

Trait Implementations

impl HeaderProvider for CombinedHeaderProvider

fn headers<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<HashMap<String, String>, HeaderProviderError>> + Send + 'async_trait>>

where 'life0: 'async_trait, CombinedHeaderProvider: 'async_trait,

fn headers_refresh<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<HashMap<String, String>, HeaderProviderError>> + Send + 'async_trait>>

where 'life0: 'async_trait, CombinedHeaderProvider: 'async_trait,

Like headers, but forces any cached authentication to refresh before returning. Request layers call this after the server rejects a request with an auth error (HTTP 401 / gRPC Unauthenticated) so a stale-but-unexpired cached token is re-minted instead of failing until its TTL. The default delegates to headers; auth providers override it to bypass their session cache and re-authenticate.