Create instantiates a middleware based on `cfg`.

EndpointFromContext returns endpoint config from context.

FromRequestContext returns request options from context.

NewRegistry returns a new middleware registry.

NewRequestContext returns a new Context that carries value.

NewRequestOptions new a request options with retry filter.

Register registers one middleware.

RegisterV2 registers one v2 middleware.

RequestBackendsFromContext returns backend nodes from context.

SelectorFiltersFromContext returns selector filter from context.

WithRequestBackends with backend nodes into context.

WithSelectorFitler with selector filter into context.

ErrNotFound is middleware not found.

RequestOptions is a request option.

Registry is the interface for callers to get registered middleware.

Factory is a middleware factory.

Middleware is handler middleware.

RoundTripperFunc is an adapter to allow the use of ordinary functions as HTTP RoundTripper.