softwaremill/sttp v3.0.0-RC3

on GitHub

This is a preview release, containing most of the functionality planned for sttp v3. The code passes all tests, however the API might change.

Breaking changes since v2:

SttpBackend trait

The trait now has 2, instead of 3 parameters. The "default" case of a backend with no additional capabilities changed:

SttpBackend[F, Nothing, NothingT] --> SttpBackend[F, Any]

The second type parameter now contains a list of supported additional capabilities. This can include:

• an implementation of Streams
• WebSockets

Finally, the type of supported streams is not given directly, but wrapped in a Streams object. For example, the types of the AkkaHttpBackend and AsyncHttpClientZioBackend backends now are:

SttpBackend[Future, AkkaStreams with WebSockets]
SttpBackend[Task, ZioStreams with WebSockets]

Request type

The type describing a request has undergone similar changes, with the last type parameter specifying the requirements that a backend must meet in order of the request to be sent. The "default" description of a request which doesn't use websockets or streams changed:

Request[T, Nothing] -> Request[T, Any]

Similarly, the type of ResponseAs changed.

The Request.send() method, which used an implicit SttpBackend is deprecated. Instead, use Request.send(backend), giving the backend explicitly.

SttpBackendStub

• method name change: thenRespondWrapped -> thenRespondF
• when nothing is stubbed, an exception (failed effect) is thrown, instead of returning 404

Other

• ResponseError -> ResponseException, but type aliases are provided
• ResponseException is parametrised with library-specific deserialisation exception type and http-error type. What previous was ResponseError[E] now would be ResponseException[String, E]
• streamBody sets application/octet-stream as the content type by default
• the default execution context used in the akka-http backend is different: instead of global, the EC backing the provided actor system is used
• for zio backends, the send method has been moved from SttpClient to the package (for consistency with other zio libraries)
• logging backends have been combined into a single one, exposing various configuration options