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# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com> # Copyright: (c) 2017, Ansible Project # Copyright: (c) 2018, Ansible Project # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) # Make coding more python3-ish from __future__ import (absolute_import, division, print_function) __metaclass__ = type import json from yaml import YAMLError from ansible.errors import AnsibleParserError from ansible.errors.yaml_strings import YAML_SYNTAX_ERROR from ansible.module_utils._text import to_native from ansible.parsing.yaml.loader import AnsibleLoader from ansible.parsing.yaml.objects import AnsibleBaseYAMLObject from ansible.parsing.ajson import AnsibleJSONDecoder __all__ = ('from_yaml',) def _handle_error(json_exc, yaml_exc, file_name, show_content): ''' Optionally constructs an object (AnsibleBaseYAMLObject) to encapsulate the file name/position where a YAML exception occurred, and raises an AnsibleParserError to display the syntax exception information. ''' # if the YAML exception contains a problem mark, use it to construct # an object the error class can use to display the faulty line err_obj = None if hasattr(yaml_exc, 'problem_mark'): err_obj = AnsibleBaseYAMLObject() err_obj.ansible_pos = (file_name, yaml_exc.problem_mark.line + 1, yaml_exc.problem_mark.column + 1) n_yaml_syntax_error = YAML_SYNTAX_ERROR % to_native(getattr(yaml_exc, 'problem', u'')) n_err_msg = 'We were unable to read either as JSON nor YAML, these are the errors we got from each:\n' \ 'JSON: %s\n\n%s' % (to_native(json_exc), n_yaml_syntax_error) raise AnsibleParserError(n_err_msg, obj=err_obj, show_content=show_content, orig_exc=yaml_exc) def _safe_load(stream, file_name=None, vault_secrets=None): ''' Implements yaml.safe_load(), except using our custom loader class. ''' loader = AnsibleLoader(stream, file_name, vault_secrets) try: return loader.get_single_data() finally: try: loader.dispose() except AttributeError: pass # older versions of yaml don't have dispose function, ignore def from_yaml(data, file_name='<string>', show_content=True, vault_secrets=None, json_only=False): ''' Creates a python datastructure from the given data, which can be either a JSON or YAML string. ''' new_data = None try: # in case we have to deal with vaults AnsibleJSONDecoder.set_secrets(vault_secrets) # we first try to load this data as JSON. # Fixes issues with extra vars json strings not being parsed correctly by the yaml parser new_data = json.loads(data, cls=AnsibleJSONDecoder) except Exception as json_exc: if json_only: raise AnsibleParserError(to_native(json_exc), orig_exc=json_exc) # must not be JSON, let the rest try try: new_data = _safe_load(data, file_name=file_name, vault_secrets=vault_secrets) except YAMLError as yaml_exc: _handle_error(json_exc, yaml_exc, file_name, show_content) return new_data