Config: Fix errors when stuff doesn't exist

Add safe fallbacks if any part of the config tree doesn't exist. This
prevents random internal server errors from showing up.

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

main.py

@@ -25,13 +25,18 @@ app = FastAPI()
 
 # Globally scoped variables. Undefined until initalized in main
 model_container: Optional[ModelContainer] = None
-config: Optional[dict] = None
+config: dict = {}
 
 @app.get("/v1/models", dependencies=[Depends(check_api_key)])
 @app.get("/v1/model/list", dependencies=[Depends(check_api_key)])
 async def list_models():
-    model_config = config["model"]
-    models = get_model_list(pathlib.Path(model_config["model_dir"] or "models"))
+    model_config = config.get("model", {})
+    if "model_dir" in model_config:
+        model_path = pathlib.Path(model_config["model_dir"])
+    else:
+        model_path = pathlib.Path("models")
+
+    models = get_model_list(model_path)
 
     return models.json()
 
@@ -50,8 +55,13 @@ async def load_model(data: ModelLoadRequest):
 
     def generator():
         global model_container
-        model_config = config["model"]
-        model_path = pathlib.Path(model_config["model_dir"] or "models")
+
+        model_config = config.get("model", {})
+        if "model_dir" in model_config:
+            model_path = pathlib.Path(model_config["model_dir"])
+        else:
+            model_path = pathlib.Path("models")
+
         model_path = model_path / data.name
 
         model_container = ModelContainer(model_path, False, **data.dict())
@@ -165,13 +175,17 @@ if __name__ == "__main__":
     load_auth_keys()
 
     # Load from YAML config. Possibly add a config -> kwargs conversion function
-    with open('config.yml', 'r') as config_file:
-        config = yaml.safe_load(config_file)
+    try:
+        with open('config.yml', 'r') as config_file:
+            config = yaml.safe_load(config_file) or {}
+    except:
+        config = {}
 
     # If an initial model name is specified, create a container and load the model
-    model_config = config["model"]
-    if model_config["model_name"]:
-        model_path = pathlib.Path(model_config["model_dir"] or "models")
+
+    model_config = config.get("model", {})
+    if "model_name" in model_config:
+        model_path = pathlib.Path(model_config.get("model", "models"))
         model_path = model_path / model_config["model_name"]
     
         model_container = ModelContainer(model_path, False, **model_config)
@@ -185,5 +199,5 @@ if __name__ == "__main__":
             else:
                 loading_bar.next()
 
-    network_config = config["network"]
-    uvicorn.run(app, host=network_config["host"] or "127.0.0.1", port=network_config["port"] or 8012, log_level="debug")
+    network_config = config.get("network", {})
+    uvicorn.run(app, host=network_config.get("host", "127.0.0.1"), port=network_config.get("port", 5000), log_level="debug")