t

sttp.client3

SttpBackend

trait SttpBackend[F[_], +P] extends AnyRef

A backend is used to send HTTP requests described by RequestT. Backends might wrap Java or Scala HTTP clients, or other backends.

F

The effect type used when returning responses. E.g. Identity for synchronous backends, scala.concurrent.Future for asynchronous backends.

P

Capabilities supported by this backend, in addition to Effect. This might be Any (no special capabilities), Streams (the ability to send and receive streaming bodies) or WebSockets (the ability to handle websocket requests).

Note

Backends should try to classify exceptions into one of the categories specified by SttpClientException. Other exceptions should be thrown unchanged.

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Known Subclasses
DelegateSttpBackend, DigestAuthenticationBackend, EitherBackend, FollowRedirectsBackend, HttpClientAsyncBackend, HttpClientBackend, HttpClientFutureBackend, HttpClientSyncBackend, HttpURLConnectionBackend, ResolveRelativeUrisBackend, TryBackend, ListenerBackend, LoggingWithResponseBodyBackend, RecordingSttpBackend, SttpBackendStub
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Abstract Value Members

  1. abstract def close(): F[Unit]
  2. abstract def responseMonad: MonadError[F]

    A monad instance for the effect type used when returning responses.

    A monad instance for the effect type used when returning responses. Allows writing wrapper backends, which map/flatMap over the return value of send.

  3. abstract def send[T, R >: P with Effect[F]](request: Request[T, R]): F[Response[T]]

    R

    The capabilities required by the request. This must be a subset of the the capabilities supported by the backend (which always includes Effect[F]).

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