fix: validate rpc target urls with pydantic

src/wf_cli/context.py

@@ -98,7 +98,7 @@ def load_cli_context(
             config_path=resolved_config_path,
             service=None,
             handlers=RpcWorkflowApiClient(
-                url=target.url,
+                url=str(target.url),
                 timeout_seconds=(
                     rpc_timeout_seconds
                     if rpc_timeout_seconds is not None

src/wf_config/models.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from pathlib import Path
 from typing import Annotated, Literal
 
-from pydantic import BaseModel, ConfigDict, Field, field_validator, model_validator
+from pydantic import AnyHttpUrl, BaseModel, ConfigDict, Field, field_validator, model_validator
 
 
 class WorkflowConfigModel(BaseModel):
@@ -18,16 +18,9 @@ class LocalTargetConfig(WorkflowConfigModel):
 
 class RpcHttpTargetConfig(WorkflowConfigModel):
     kind: Literal["rpc_http"]
-    url: str = Field(min_length=1)
+    url: AnyHttpUrl
     timeout_seconds: float = Field(default=30.0, gt=0)
 
-    @field_validator("url")
-    @classmethod
-    def validate_url(cls, value: str) -> str:
-        if not value.startswith(("http://", "https://")):
-            raise ValueError("rpc_http target url must start with http:// or https://")
-        return value
-
 
 TargetConfig = Annotated[
     LocalTargetConfig | RpcHttpTargetConfig,

tests/wf_config/test_config_models.py

@@ -60,7 +60,7 @@ def test_workflow_config_parses_rpc_http_target_and_transport() -> None:
     )
 
     assert isinstance(config.client.target, RpcHttpTargetConfig)
-    assert config.client.target.url == "http://127.0.0.1:8765/rpc"
+    assert str(config.client.target.url) == "http://127.0.0.1:8765/rpc"
     assert config.client.target.timeout_seconds == 12
     assert isinstance(config.server.transports[0], RpcHttpTransportConfig)
     assert config.server.transports[0].host == "0.0.0.0"
@@ -93,7 +93,7 @@ def test_workflow_config_rejects_unknown_target_kind() -> None:
 
 
 def test_workflow_config_rejects_invalid_rpc_http_url() -> None:
-    with pytest.raises(ValidationError, match="http:// or https://"):
+    with pytest.raises(ValidationError):
         WorkflowConfigFile.model_validate(
             {
                 "version": 1,