Working on streaming download files and or range selection for file downloads

app/routers/event_file.py

@@ -1,6 +1,6 @@
 import datetime, os, pathlib, time
 from fastapi import APIRouter, Body, Depends, Header, HTTPException, Query, Response, status
-from fastapi.responses import FileResponse
+from fastapi.responses import FileResponse, StreamingResponse
 from pydantic import BaseModel, EmailStr, Field
 from typing import Dict, List, Optional, Set, Union
 
@@ -240,6 +240,7 @@ async def event_file_lookup(
 async def download_event_file(
         event_file_id: str = Query(..., min_length=11, max_length=22),
         filename: str = Query(None, min_length=4, max_length=100),
+        streaming: bool = False,
 
         commons: Common_Route_Params = Depends(common_route_params),
         ):
@@ -280,10 +281,17 @@ async def download_event_file(
 
     if os.path.exists(file_path_w_subdir):
         log.info('Hosted file found on server.')
-        return FileResponse(file_path_w_subdir, filename=filename)
+        if streaming:
+            log.warning('Streaming!!!')
+            def iterfile():  #
+                with open(file_path_w_subdir, mode="rb") as file_like:  #
+                    yield from file_like  #
+            return StreamingResponse(iterfile(), media_type='video/mp4')
+        else:
+            return FileResponse(file_path_w_subdir, filename=filename)
     else:
         log.error(f'The hosted file was not found on the server. Hash: {hash_sha256}')
-        return mk_resp(data=False, status_code=404, response=commons.response, status_message=f'The hosted file was not found on the server. Hash: {hash_sha256}') # Not Found
+        return mk_resp(data=None, status_code=404, response=commons.response, status_message=f'The hosted file was not found on the server. Hash: {hash_sha256}') # Not Found
 # ### END ### API Event File ### download_event_file() ###