add missing files throughout the codebase (#102)

django-stubs/http/request.pyi

@@ -1,8 +1,8 @@
 from io import BytesIO
-from typing import Any, BinaryIO, Dict, Iterable, List, Mapping, Optional, Pattern, Tuple, Union, overload
+from typing import Any, BinaryIO, Dict, Iterable, List, Mapping, Optional, Pattern, Set, Tuple, Union, overload
 
 from django.contrib.sessions.backends.base import SessionBase
-from django.utils.datastructures import ImmutableList, MultiValueDict
+from django.utils.datastructures import CaseInsensitiveMapping, ImmutableList, MultiValueDict
 
 from django.core.files import uploadedfile, uploadhandler
 from django.urls import ResolverMatch
@@ -15,6 +15,13 @@ class RawPostDataException(Exception): ...
 
 UploadHandlerList = Union[List[uploadhandler.FileUploadHandler], ImmutableList[uploadhandler.FileUploadHandler]]
 
+class HttpHeaders(CaseInsensitiveMapping):
+    HTTP_PREFIX: str = ...
+    UNPREFIXED_HEADERS: Set[str] = ...
+    def __init__(self, environ: Mapping[str, Any]) -> None: ...
+    @classmethod
+    def parse_header_name(cls, header: str) -> Optional[str]: ...
+
 class HttpRequest(BytesIO):
     GET: QueryDict = ...
     POST: QueryDict = ...
@@ -48,6 +55,8 @@ class HttpRequest(BytesIO):
         self, META: Mapping[str, Any], post_data: BinaryIO
     ) -> Tuple[QueryDict, MultiValueDict[str, uploadedfile.UploadedFile]]: ...
     @property
+    def headers(self) -> HttpHeaders: ...
+    @property
     def body(self) -> bytes: ...
     def _load_post_and_files(self) -> None: ...