Added MAX_CONTENT_LENGTH config key

flask/app.py

@@ -193,7 +193,8 @@ class Flask(_PackageBoundObject):
         'PERMANENT_SESSION_LIFETIME':           timedelta(days=31),
         'USE_X_SENDFILE':                       False,
         'LOGGER_NAME':                          None,
-        'SERVER_NAME':                          None
+        'SERVER_NAME':                          None,
+        'MAX_CONTENT_LENGTH':                   None
     })
 
     def __init__(self, import_name, static_path=None):

flask/wrappers.py

@@ -13,6 +13,7 @@ from werkzeug import Request as RequestBase, Response as ResponseBase, \
     cached_property
 
 from .helpers import json, _assert_have_json
+from .globals import _request_ctx_stack
 
 
 class Request(RequestBase):
@@ -41,6 +42,13 @@ class Request(RequestBase):
     #: something similar.
     routing_exception = None
 
+    @property
+    def max_content_length(self):
+        """Read-only view of the `MAX_CONTENT_LENGTH` config key."""
+        ctx = _request_ctx_stack.top
+        if ctx is not None:
+            return ctx.app.config['MAX_CONTENT_LENGTH']
+
     @property
     def endpoint(self):
         """The endpoint that matched the request.  This in combination with