Ticket #30310: request.diff

lib/python3.6/site-packages/django/http/request.py

@@ -378 +378 @@
                 headers[name] = value
         super().__init__(headers)
 
+    def __getitem__(self, key):
+        """
+        Django template variables cannot contain hyphens, so to allow use
+        of the headers object in templates, we also try to look up the 
+        variable with underscores. For example, use headers['foo-bar']
+        in views, and {{ headers.foo_bar }} in templates.
+        """
+        value = None
+        try:
+            value = super().__getitem__(key)
+        except KeyError:
+            value = super().__getitem__(key.replace('_', '-'))
+        return value
+
     @classmethod
     def parse_header_name(cls, header):
         if header.startswith(cls.HTTP_PREFIX):