62 lines
1.6 KiB
Python
62 lines
1.6 KiB
Python
from . import exceptions
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from . import logging
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import jsonschema
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import os
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import pkg_resources
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import yaml
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__all__ = ['check_schema', 'check_schemas']
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LOG = logging.getLogger(__name__)
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def check_schemas(documents):
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for document in documents:
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check_schema(document)
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def check_schema(document):
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if type(document) != dict:
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LOG.error('Non-dictionary document passed to schema validation.')
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return
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schema_name = document.get('schema', '<missing>')
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LOG.debug('Validating schema for schema=%s metadata.name=%s', schema_name,
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document.get('metadata', {}).get('name', '<missing>'))
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if schema_name in SCHEMAS:
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try:
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jsonschema.validate(document.get('data'), SCHEMAS[schema_name])
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except jsonschema.ValidationError as e:
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raise exceptions.ValidationException(str(e))
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else:
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LOG.warning('Skipping validation for unknown schema: %s', schema_name)
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SCHEMAS = {}
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def _load_schemas():
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'''
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Fills the cache of known schemas
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'''
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schema_dir = _get_schema_dir()
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for schema_file in os.listdir(schema_dir):
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with open(os.path.join(schema_dir, schema_file)) as f:
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for schema in yaml.safe_load_all(f):
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name = schema['metadata']['name']
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if name in SCHEMAS:
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raise RuntimeError(
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'Duplicate schema specified for: %s' % name)
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SCHEMAS[name] = schema['data']
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def _get_schema_dir():
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return pkg_resources.resource_filename('promenade', 'schemas')
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# Fill the cache
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_load_schemas()
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