fix partial content range for iOS safari media

jivago/wsgi/request/partial_content_handler.py

@@ -7,14 +7,15 @@
 
 class PartialContentHandler(object):
 
-    def handle_partial_content_request(self, request: Request, filepath: str, *, max_block_size: int = 2000000) -> Response:
+    def handle_partial_content_request(self, request: Request, filepath: str, *, max_block_size: int = 2000000,
+                                       content_type = "application/octet-stream") -> Response:
         if request.headers['Range']:
             total_filesize = os.path.getsize(filepath)
             start, end = self._parse_range_string(request.headers['Range'], max_block_size, total_filesize)
-            return Response(206, {"Content-Type": "application/octet-stream", "Accept-Ranges": "bytes",
-                                  "Content-Range": f"bytes {start}-{end - 1}/{total_filesize}"}, self._read_partial_file(filepath, start, end))
+            return Response(206, {"Content-Type": content_type, "Accept-Ranges": "bytes",
+                                  "Content-Range": f"bytes {start}-{end-1}/{total_filesize}"}, self._read_partial_file(filepath, start, end))
 
-        return Response(200, {"Content-Type": "application/octet-stream"}, self._read_whole_file(filepath))
+        return Response(200, {"Content-Type": content_type}, self._read_whole_file(filepath))
 
     def _parse_range_string(self, range_string: str, default_block_size: int, file_end_offset: int) -> Tuple[int, int]:
         start = int(range_string.split("=")[1].split("-")[0])
@@ -29,7 +30,7 @@ def _parse_range_string(self, range_string: str, default_block_size: int, file_e
     def _read_partial_file(self, filepath: str, start: int, end: int) -> bytes:
         with open(filepath, 'rb') as f:
             f.seek(start)
-            return f.read(end - start)
+            return f.read(end - start + 1)
 
     def _read_whole_file(self, filepath: str) -> bytes:
         with open(filepath, 'rb') as f: