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# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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# contributor license agreements. See the NOTICE file distributed with |
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# this work for additional information regarding copyright ownership. |
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# The ASF licenses this file to You under the Apache License, Version 2.0 |
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# (the "License"); you may not use this file except in compliance with |
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# the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import re |
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import six |
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import yaml |
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from mistralclient.api import client as mistral |
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from oslo_config import cfg |
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from st2common.exceptions.workflow import WorkflowDefinitionException |
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from st2common import log as logging |
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from st2common.util.workflow import mistral as utils |
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from st2common.util.url import get_url_without_trailing_slash |
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from st2common.validators.workflow.base import WorkflowValidator |
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LOG = logging.getLogger(__name__) |
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def get_validator(): |
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return MistralWorkflowValidator() |
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class MistralWorkflowValidator(WorkflowValidator): |
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url = get_url_without_trailing_slash(cfg.CONF.mistral.v2_base_url) |
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def __init__(self): |
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super(MistralWorkflowValidator, self).__init__() |
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self._client = mistral.client( |
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mistral_url=self.url, |
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username=cfg.CONF.mistral.keystone_username, |
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api_key=cfg.CONF.mistral.keystone_password, |
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project_name=cfg.CONF.mistral.keystone_project_name, |
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auth_url=cfg.CONF.mistral.keystone_auth_url) |
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@staticmethod |
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def parse(message): |
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result = { |
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'type': None, |
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'path': None, |
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'message': message |
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} |
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# Check message for schema specific error. |
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m1 = re.search('^Invalid DSL: (.+)\n', message) |
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if m1: |
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result['type'] = 'schema' |
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result['message'] = m1.group(1) |
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path = re.search('On instance(.+):', message) |
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if path: |
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result['path'] = path.group(1).strip("[']").replace("']['", ".") |
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# Check message for YAQL specific error. |
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m2 = re.search('^Parse error: (.+)$', message) |
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if m2: |
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result['type'] = 'yaql' |
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result['message'] = m2.group(1) |
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# Check message for action parameters specific error. |
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if any([candidate in message |
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for candidate in ['Missing required parameters', |
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'Unexpected parameters', |
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'st2.callback is deprecated']]): |
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result['type'] = 'action' |
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return result |
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def validate(self, definition): |
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def_dict = yaml.safe_load(definition) |
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is_workbook = ('workflows' in def_dict) |
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if not is_workbook: |
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# Non-workbook definition containing multiple workflows is not supported. |
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if len([k for k, _ in six.iteritems(def_dict) if k != 'version']) != 1: |
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return [self.parse('Multiple workflows is not supported workflow ' |
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'only (not a workbook) definition.')] |
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# Select validation function. |
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func = self._client.workbooks.validate if is_workbook else self._client.workflows.validate |
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# Validate before custom DSL transformation. |
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result = func(definition) |
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if not result.get('valid', None): |
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return [self.parse(result.get('error', 'Unknown exception.'))] |
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try: |
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# Run custom DSL transformer to check action parameters. |
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utils.transform_definition(def_dict) |
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except WorkflowDefinitionException as e: |
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return [self.parse(e.message)] |
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return [] |
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StackStorm /
st2
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Cyclic imports may cause partly loaded modules to be returned. This might lead to unexpected runtime behavior which is hard to debug.