Fixed #1288: app.add_url_rule() should look for OPTIONS methods in a case-insensitive manner

flask/app.py

@@ -998,7 +998,7 @@ class Flask(_PackageBoundObject):
         if isinstance(methods, string_types):
             raise TypeError('Allowed methods have to be iterables of strings, '
                             'for example: @app.route(..., methods=["POST"])')
-        methods = set(methods)
+        methods = set(item.upper() for item in methods)
 
         # Methods that should always be added
         required_methods = set(getattr(view_func, 'required_methods', ()))

tests/test_basic.py

@@ -107,15 +107,24 @@ def test_disallow_string_for_allowed_methods():
 def test_url_mapping():
     app = flask.Flask(__name__)
 
+    random_uuid4 = "7eb41166-9ebf-4d26-b771-ea3f54f8b383"
+
     def index():
         return flask.request.method
 
     def more():
         return flask.request.method
 
+    def options():
+        return random_uuid4
+
+
     app.add_url_rule('/', 'index', index)
     app.add_url_rule('/more', 'more', more, methods=['GET', 'POST'])
 
+    # Issue 1288: Test that automatic options are not added when non-uppercase 'options' in methods
+    app.add_url_rule('/options', 'options', options, methods=['options'])
+
     c = app.test_client()
     assert c.get('/').data == b'GET'
     rv = c.post('/')
@@ -129,6 +138,9 @@ def test_url_mapping():
     rv = c.delete('/more')
     assert rv.status_code == 405
     assert sorted(rv.allow) == ['GET', 'HEAD', 'OPTIONS', 'POST']
+    rv = c.open('/options', method='OPTIONS')
+    assert rv.status_code == 200
+    assert random_uuid4 in rv.data.decode("utf-8")
 
 
 def test_werkzeug_routing():