__ __ __ __ _____ _ _ _____ _ _ _
| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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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