diff --git a/SpiffWorkflow/SpiffWorkflow/spiff/specs/service_task.py b/SpiffWorkflow/SpiffWorkflow/spiff/specs/service_task.py index 80e3f345..c31e2fb5 100644 --- a/SpiffWorkflow/SpiffWorkflow/spiff/specs/service_task.py +++ b/SpiffWorkflow/SpiffWorkflow/spiff/specs/service_task.py @@ -1,6 +1,7 @@ from copy import deepcopy import json from SpiffWorkflow.bpmn.specs.ServiceTask import ServiceTask +from SpiffWorkflow.exceptions import WorkflowTaskException from SpiffWorkflow.spiff.specs.spiff_task import SpiffBpmnTask class ServiceTask(SpiffBpmnTask, ServiceTask): @@ -31,9 +32,13 @@ class ServiceTask(SpiffBpmnTask, ServiceTask): operation_params_copy = deepcopy(self.operation_params) evaluated_params = {k: evaluate(v) for k, v in operation_params_copy.items()} - result = task.workflow.script_engine.call_service(self.operation_name, - evaluated_params, task.data) - + try: + result = task.workflow.script_engine.call_service(self.operation_name, + evaluated_params, task.data) + except Exception as e: + wte = WorkflowTaskException("Error executing Service Task", + task=task, exception=e) + wte.add_note(str(e)) + raise wte parsed_result = json.loads(result) - task.data[self._result_variable(task)] = parsed_result diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/__init__.py b/spiffworkflow-backend/src/spiffworkflow_backend/__init__.py index b3e85cd7..9aec289d 100644 --- a/spiffworkflow-backend/src/spiffworkflow_backend/__init__.py +++ b/spiffworkflow-backend/src/spiffworkflow_backend/__init__.py @@ -1,7 +1,7 @@ """__init__.""" +import faulthandler import os import sys -import faulthandler from typing import Any import connexion # type: ignore diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/services/service_task_service.py b/spiffworkflow-backend/src/spiffworkflow_backend/services/service_task_service.py index 37af3956..da3a65bb 100644 --- a/spiffworkflow-backend/src/spiffworkflow_backend/services/service_task_service.py +++ b/spiffworkflow-backend/src/spiffworkflow_backend/services/service_task_service.py @@ -43,6 +43,49 @@ class ServiceTaskDelegate: return value + @staticmethod + def get_message_for_status(code: int) -> str: + """Given a code like 404, return a string like 'The requested resource was not found.'""" + msg = f"HTTP Status Code {code}." + if code == 301: + msg = ( + "301 (Permanent Redirect) - you may need to use a different URL in this" + " service task." + ) + if code == 302: + msg = ( + "302 (Temporary Redirect) - you may need to use a different URL in this" + " service task." + ) + if code == 400: + msg = ( + "400 (Bad Request) - The request was received by the service, but it" + " was not understood." + ) + if code == 401: + msg = ( + "401 (Unauthorized Error) - this end point requires some form of" + " authentication." + ) + if code == 403: + msg = ( + "403 (Forbidden) - The service you called refused to accept the" + " request." + ) + if code == 404: + msg = "404 (Not Found) - The service did not find the requested resource." + if code == 500: + msg = ( + "500 (Internal Server Error) - The service you called is experiencing" + " technical difficulties." + ) + if code == 501: + msg = ( + "501 (Not Implemented) - This service needs to be called with the" + " different method (like POST not GET)." + ) + return msg + @staticmethod def call_connector(name: str, bpmn_params: Any, task_data: Any) -> str: """Calls a connector via the configured proxy.""" @@ -55,17 +98,43 @@ class ServiceTaskDelegate: params["spiff__task_data"] = task_data proxied_response = requests.post(call_url, json=params) + response_text = proxied_response.text + json_parse_error = None - parsed_response = json.loads(proxied_response.text) + if response_text == "": + response_text = "{}" + try: + parsed_response = json.loads(response_text) + except Exception as e: + json_parse_error = e + parsed_response = {} + + if proxied_response.status_code >= 300: + error = f"Received an unexpected response from the service : " + error += ServiceTaskDelegate.get_message_for_status( + proxied_response.status_code + ) + if "error" in parsed_response: + error += parsed_response["error"] + if json_parse_error: + error += ( + "A critical component (The connector proxy) is not responding" + " correctly." + ) + raise ConnectorProxyError(error) + elif json_parse_error: + raise ConnectorProxyError( + f"There is a problem with this connector: '{name}'. " + "Responses for connectors must be in JSON format. " + ) if "refreshed_token_set" not in parsed_response: - return proxied_response.text + return response_text secret_key = parsed_response["auth"] refreshed_token_set = json.dumps(parsed_response["refreshed_token_set"]) user_id = g.user.id if UserService.has_user() else None SecretService().update_secret(secret_key, refreshed_token_set, user_id) - return json.dumps(parsed_response["api_response"]) diff --git a/spiffworkflow-backend/tests/spiffworkflow_backend/unit/test_service_task_delegate.py b/spiffworkflow-backend/tests/spiffworkflow_backend/unit/test_service_task_delegate.py index 95b55756..188722fa 100644 --- a/spiffworkflow-backend/tests/spiffworkflow_backend/unit/test_service_task_delegate.py +++ b/spiffworkflow-backend/tests/spiffworkflow_backend/unit/test_service_task_delegate.py @@ -1,8 +1,10 @@ """Test_various_bpmn_constructs.""" +import pytest from flask.app import Flask +from unittest.mock import Mock, patch from tests.spiffworkflow_backend.helpers.base_test import BaseTest - from spiffworkflow_backend.services.secret_service import SecretService +from spiffworkflow_backend.services.service_task_service import ConnectorProxyError from spiffworkflow_backend.services.service_task_service import ServiceTaskDelegate @@ -31,3 +33,19 @@ class TestServiceTaskDelegate(BaseTest): SecretService().add_secret("hot_secret", "my_secret_value", user.id) result = ServiceTaskDelegate.check_prefixes("secret:hot_secret") assert result == "my_secret_value" + + def test_invalid_call_returns_good_error_message( + self, app: Flask, with_db_and_bpmn_file_cleanup: None + ) -> None: + with patch('requests.post') as mock_post: + mock_post.return_value.status_code = 404 + mock_post.return_value.ok = True + mock_post.return_value.json.return_value = "" + with pytest.raises(ConnectorProxyError) as ae: + ServiceTaskDelegate.call_connector("my_invalid_operation", {}, {}) + assert "404" in str(ae) + assert "The service did not find the requested resource." in str(ae) + assert ( + "A critical component (The connector proxy) is not responding correctly." + in str(ae) + )