1 files changed, 34 insertions, 0 deletions
diff --git a/gitlab/_backends/protocol.py b/gitlab/_backends/protocol.py
new file mode 100644
index 0000000..f89740b
--- /dev/null
+++ b/gitlab/_backends/protocol.py
@@ -0,0 +1,34 @@
+import abc
+import sys
+from typing import Any, Dict, Optional, Union
+
+import requests
+from requests_toolbelt.multipart.encoder import MultipartEncoder  # type: ignore
+
+if sys.version_info >= (3, 8):
+    from typing import Protocol
+else:
+    from typing_extensions import Protocol
+
+
+class BackendResponse(Protocol):
+    @abc.abstractmethod
+    def __init__(self, response: requests.Response) -> None:
+        ...
+
+
+class Backend(Protocol):
+    @abc.abstractmethod
+    def http_request(
+        self,
+        method: str,
+        url: str,
+        json: Optional[Union[Dict[str, Any], bytes]],
+        data: Optional[Union[Dict[str, Any], MultipartEncoder]],
+        params: Optional[Any],
+        timeout: Optional[float],
+        verify: Optional[Union[bool, str]],
+        stream: Optional[bool],
+        **kwargs: Any,
+    ) -> BackendResponse:
+        ...