fix: expose http client as injection token

Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>

ioeither/http/di.go

@@ -0,0 +1,32 @@
+// Copyright (c) 2023 IBM Corp.
+// All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package http
+
+import (
+	"net/http"
+
+	DI "github.com/IBM/fp-go/di"
+	IOE "github.com/IBM/fp-go/ioeither"
+	L "github.com/IBM/fp-go/lazy"
+)
+
+var (
+	// InjHttpClient is the injection token for the default http client
+	InjHttpClient = DI.MakeTokenWithDefault0("HTTP_CLIENT", L.Of(IOE.Of[error](http.DefaultClient)))
+
+	// InjClient is the injection token for the default [Client]
+	InjClient = DI.MakeTokenWithDefault1("CLIENT", InjHttpClient.IOEither(), IOE.Map[error](MakeClient))
+)