fix: validate endpoint url

currently `llama-stack-client configure` allows a user to set up with a valid URL such as ` ['::', '0.0.0.0']:8321` and then any subsequent command fails due to improperly reading the bad URL from the config.yaml

Signed-off-by: Charlie Doern <cdoern@redhat.com>

Author: cdoern

requirements.txt

@@ -54,5 +54,6 @@ tqdm==4.67.1
 typing-extensions==4.7.1 ; python_full_version < '3.8'
 typing-extensions==4.12.2 ; python_full_version >= '3.8'
 tzdata==2025.1 ; python_full_version >= '3.8'
+validators==0.34.0
 wcwidth==0.2.13
 zipp==3.15.0 ; python_full_version < '3.8'

src/llama_stack_client/lib/cli/configure.py

@@ -10,6 +10,7 @@
 import yaml
 from prompt_toolkit import prompt
 from prompt_toolkit.validation import Validator
+import validators
 
 from llama_stack_client.lib.cli.constants import LLAMA_STACK_CLIENT_CONFIG_DIR, get_config_file_path
 
@@ -36,8 +37,8 @@ def configure(endpoint: str | None, api_key: str | None):
         final_endpoint = prompt(
             "> Enter the endpoint of the Llama Stack distribution server: ",
             validator=Validator.from_callable(
-                lambda x: len(x) > 0,
-                error_message="Endpoint cannot be empty, please enter a valid endpoint",
+                lambda x: len(x) > 0 and validators.url(x),
+                error_message="Endpoint cannot be empty and must be a valid URL, please enter a valid endpoint",
             ),
         )