Config: Add option to force streaming off

Many APIs automatically ask for request streaming without giving
the user the option to turn it off. Therefore, give the user more
freedom by giving a server-side kill switch.

Signed-off-by: kingbri <bdashore3@proton.me>

common/args.py

@@ -135,3 +135,8 @@ def add_developer_args(parser: argparse.ArgumentParser):
     developer_group.add_argument(
         "--unsafe-launch", type=str_to_bool, help="Skip Exllamav2 version check"
     )
+    developer_group.add_argument(
+        "--disable-request-streaming",
+        type=str_to_bool,
+        help="Disables API request streaming",
+    )

config_sample.yml

@@ -42,6 +42,10 @@ developer:
   # WARNING: Don't set this unless you know what you're doing!
   #unsafe_launch: False
 
+  # Disable all request streaming (default: False)
+  # A kill switch for turning off SSE in the API server
+  #disable_request_streaming: False
+
 # Options for model overrides and loading
 model:
   # Overrides the directory to look for models (default: models)

main.py

@@ -449,7 +449,11 @@ async def generate_completion(request: Request, data: CompletionRequest):
     if isinstance(data.prompt, list):
         data.prompt = "\n".join(data.prompt)
 
-    if data.stream:
+    disable_request_streaming = unwrap(
+        get_developer_config().get("disable_request_streaming"), False
+    )
+
+    if data.stream and not disable_request_streaming:
 
         async def generator():
             """Generator for the generation process."""
@@ -531,7 +535,11 @@ async def generate_chat_completion(request: Request, data: ChatCompletionRequest
                 f"TemplateError: {str(exc)}",
             ) from exc
 
-    if data.stream:
+    disable_request_streaming = unwrap(
+        get_developer_config().get("disable_request_streaming"), False
+    )
+
+    if data.stream and not disable_request_streaming:
         const_id = f"chatcmpl-{uuid4().hex}"
 
         async def generator():