fix: add constant

Author: giancarloromeo

packages/service-library/src/servicelib/aiohttp/rest_responses.py

@@ -7,7 +7,7 @@
 from models_library.rest_error import ErrorGet, ErrorItemType
 
 from ..aiohttp.status import HTTP_200_OK
-from ..mimetype_constants import MIMETYPE_APPLICATION_JSON
+from ..mimetype_constants import MIMETYPE_APPLICATION_JSON, MIMETYPE_TEXT_EVENT_STREAM
 from ..rest_constants import RESPONSE_MODEL_POLICY
 from ..rest_responses import is_enveloped
 from ..status_codes_utils import get_code_description, get_code_display_name, is_error
@@ -41,7 +41,7 @@ def create_event_stream_response(event_generator: Any) -> web.Response:
         body=event_generator(),
         status=HTTP_200_OK,
         reason=get_code_description(HTTP_200_OK),
-        content_type="text/event-stream",
+        content_type=MIMETYPE_TEXT_EVENT_STREAM,
         headers={"Cache-Control": "no-cache", "Connection": "keep-alive"},
     )
 

packages/service-library/src/servicelib/mimetype_constants.py

@@ -7,12 +7,14 @@
 
 SEE https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types
 """
+
 from typing import Final
 
 # NOTE: mimetypes (https://docs.python.org/3/library/mimetypes.html) is already a module in python
 
 MIMETYPE_APPLICATION_JSON: Final[str] = "application/json"
 MIMETYPE_APPLICATION_ND_JSON: Final[str] = "application/x-ndjson"
 MIMETYPE_APPLICATION_ZIP: Final[str] = "application/zip"
+MIMETYPE_TEXT_EVENT_STREAM: Final[str] = "text/event-stream"
 MIMETYPE_TEXT_HTML: Final[str] = "text/html"
 MIMETYPE_TEXT_PLAIN: Final[str] = "text/plain"