api/read: initial implementation of the package

api/read/read.go

@@ -0,0 +1,30 @@
+// Package read implements request object readers.
+package read
+
+import (
+	"encoding/json"
+	"io"
+
+	"github.com/smallstep/certificates/errs"
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/proto"
+)
+
+// JSON reads JSON from the request body and stores it in the value
+// pointed by v.
+func JSON(r io.Reader, v interface{}) error {
+	if err := json.NewDecoder(r).Decode(v); err != nil {
+		return errs.BadRequestErr(err, "error decoding json")
+	}
+	return nil
+}
+
+// ProtoJSON reads JSON from the request body and stores it in the value
+// pointed by v.
+func ProtoJSON(r io.Reader, m proto.Message) error {
+	data, err := io.ReadAll(r)
+	if err != nil {
+		return errs.BadRequestErr(err, "error reading request body")
+	}
+	return protojson.Unmarshal(data, m)
+}