1 files changed, 26 insertions, 0 deletions
diff --git a/core/src/main/scala/com/softwaremill/sttp/SttpBackend.scala b/core/src/main/scala/com/softwaremill/sttp/SttpBackend.scala
new file mode 100644
index 0000000..6eb312f
--- /dev/null
+++ b/core/src/main/scala/com/softwaremill/sttp/SttpBackend.scala
@@ -0,0 +1,26 @@
+package com.softwaremill.sttp
+
+import scala.language.higherKinds
+import scala.concurrent.duration._
+
+/**
+  * @tparam R The type constructor in which responses are wrapped. E.g. `Id`
+  *           for synchronous backends, `Future` for asynchronous backends.
+  * @tparam S The type of streams that are supported by the backend. `Nothing`,
+  *           if streaming requests/responses is not supported by this backend.
+  */
+trait SttpBackend[R[_], -S] {
+  def send[T](request: Request[T, S]): R[Response[T]]
+
+  def close(): Unit
+
+  /**
+    * The monad in which the responses are wrapped. Allows writing wrapper
+    * backends, which map/flatMap over the return value of [[send]].
+    */
+  def responseMonad: MonadError[R]
+}
+
+object SttpBackend {
+  private[sttp] val DefaultConnectionTimeout = 30.seconds
+}