enh: enable selecting individual files from collection

backend/open_webui/apps/webui/routers/files.py

@@ -213,7 +213,7 @@ async def update_file_data_content_by_id(
 ############################
 
 
-@router.get("/{id}/content", response_model=Optional[FileModel])
+@router.get("/{id}/content")
 async def get_file_content_by_id(id: str, user=Depends(get_verified_user)):
     file = Files.get_file_by_id(id)
 
@@ -239,7 +239,7 @@ async def get_file_content_by_id(id: str, user=Depends(get_verified_user)):
         )
 
 
-@router.get("/{id}/content/{file_name}", response_model=Optional[FileModel])
+@router.get("/{id}/content/{file_name}")
 async def get_file_content_by_id(id: str, user=Depends(get_verified_user)):
     file = Files.get_file_by_id(id)
 
@@ -251,7 +251,10 @@ async def get_file_content_by_id(id: str, user=Depends(get_verified_user)):
             # Check if the file already exists in the cache
             if file_path.is_file():
                 print(f"file_path: {file_path}")
-                return FileResponse(file_path)
+                headers = {
+                    "Content-Disposition": f'attachment; filename="{file.meta.get("name", file.filename)}"'
+                }
+                return FileResponse(file_path, headers=headers)
             else:
                 raise HTTPException(
                     status_code=status.HTTP_404_NOT_FOUND,

backend/open_webui/apps/webui/routers/knowledge.py

@@ -48,7 +48,12 @@ async def get_knowledge_items(
             )
     else:
         return [
-            KnowledgeResponse(**knowledge.model_dump())
+            KnowledgeResponse(
+                **knowledge.model_dump(),
+                files=Files.get_file_metadatas_by_ids(
+                    knowledge.data.get("file_ids", []) if knowledge.data else []
+                ),
+            )
             for knowledge in Knowledges.get_knowledge_items()
         ]