function to unmarshal proto message from io reader

Signed-off-by: Michael <michael.lindman@gmail.com>

pb/proto.go

@@ -2,6 +2,7 @@ package pb
 
 import (
 	"bytes"
+	"io"
 	"io/fs"
 	"io/ioutil"
 	"strconv"
@@ -50,3 +51,15 @@ func SendFile(url string, headers map[string]string, message protoreflect.ProtoM
 	}
 	return req, nil
 }
+
+// UnmarshalReader unmarshals io reader into proto message
+func UnmarshalReader(r io.Reader, m protoreflect.ProtoMessage) error {
+	body, err := ioutil.ReadAll(r)
+	if err != nil {
+		return err
+	}
+	if err := proto.Unmarshal(body, m); err != nil {
+		return err
+	}
+	return nil
+}