fix: BaseResponse import - replace wekzeug import __version__ by importlib (#573) (#575)

* fix: BaseResponse import - replace wekzeug old style import dunder version by importlib (#573)

* add: import_werkzeug_response test

* modify: changelog - note fix (#573)

---------

Co-authored-by: Tomáš Trval <trval@kajot.cz>
Co-authored-by: Peter Doggart <10991724+peter-doggart@users.noreply.github.com>

Author: 3 people

CHANGELOG.rst

@@ -34,6 +34,7 @@ Bug Fixes
 
 ::
 
+   * Fixing werkzeug 3 deprecated version import. Import is replaced by new style version check with importlib (#573) [Ryu-CZ]
    * Fixing flask 3.0+ compatibility of `ModuleNotFoundError: No module named 'flask.scaffold'` Import error. (#567) [Ryu-CZ]
 
 

flask_restx/api.py

@@ -28,20 +28,13 @@
     InternalServerError,
 )
 
-from werkzeug import __version__ as werkzeug_version
-
-if werkzeug_version.split(".")[0] >= "2":
-    from werkzeug.wrappers import Response as BaseResponse
-else:
-    from werkzeug.wrappers import BaseResponse
-
 from . import apidoc
 from .mask import ParseError, MaskError
 from .namespace import Namespace
 from .postman import PostmanCollectionV1
 from .resource import Resource
 from .swagger import Swagger
-from .utils import default_id, camel_to_dash, unpack, import_check_view_func
+from .utils import default_id, camel_to_dash, unpack, import_check_view_func, BaseResponse
 from .representations import output_json
 from ._http import HTTPStatus
 

flask_restx/resource.py

@@ -1,15 +1,10 @@
 from flask import request
 from flask.views import MethodView
-from werkzeug import __version__ as werkzeug_version
 
-if werkzeug_version.split(".")[0] >= "2":
-    from werkzeug.wrappers import Response as BaseResponse
-else:
-    from werkzeug.wrappers import BaseResponse
 
 from .model import ModelBase
 
-from .utils import unpack
+from .utils import unpack, BaseResponse
 
 
 class Resource(MethodView):

flask_restx/utils.py

@@ -19,10 +19,29 @@
     "not_none",
     "not_none_sorted",
     "unpack",
+    "BaseResponse",
     "import_check_view_func",
 )
 
 
+def import_werkzeug_response():
+    """Resolve `werkzeug` `Response` class import because
+    `BaseResponse` was renamed in version 2.* to `Response`"""
+    import importlib.metadata
+
+    werkzeug_major = int(importlib.metadata.version("werkzeug").split(".")[0])
+    if werkzeug_major < 2:
+        from werkzeug.wrappers import BaseResponse
+
+        return BaseResponse
+
+    from werkzeug.wrappers import Response
+
+    return Response
+
+
+BaseResponse = import_werkzeug_response()
+
 class FlaskCompatibilityWarning(DeprecationWarning):
     pass
 

tests/test_utils.py

@@ -47,6 +47,11 @@ def test_recursions_with_empty(self):
         assert utils.merge(a, b) == b
 
 
+class UnpackImportResponse(object):
+    def test_import_werkzeug_response(self):
+        assert utils.import_werkzeug_response() != None
+
+
 class CamelToDashTestCase(object):
     def test_no_transform(self):
         assert utils.camel_to_dash("test") == "test"