80 lines
3.3 KiB
Python
80 lines
3.3 KiB
Python
# This code is part of Ansible, but is an independent component.
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# This particular file snippet, and this file snippet only, is BSD licensed.
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# Modules you write using this snippet, which is embedded dynamically by Ansible
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# still belong to the author of the module, and may assign their own license
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# to the complete work.
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import json
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# NB: a copy of this function exists in ../../modules/core/async_wrapper.py. Ensure any
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# changes are propagated there.
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def _filter_non_json_lines(data):
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'''
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Used to filter unrelated output around module JSON output, like messages from
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tcagetattr, or where dropbear spews MOTD on every single command (which is nuts).
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Filters leading lines before first line-starting occurrence of '{' or '[', and filter all
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trailing lines after matching close character (working from the bottom of output).
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'''
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warnings = []
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# Filter initial junk
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lines = data.splitlines()
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for start, line in enumerate(lines):
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line = line.strip()
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if line.startswith(u'{'):
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endchar = u'}'
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break
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elif line.startswith(u'['):
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endchar = u']'
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break
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else:
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raise ValueError('No start of json char found')
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# Filter trailing junk
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lines = lines[start:]
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for reverse_end_offset, line in enumerate(reversed(lines)):
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if line.strip().endswith(endchar):
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break
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else:
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raise ValueError('No end of json char found')
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if reverse_end_offset > 0:
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# Trailing junk is uncommon and can point to things the user might
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# want to change. So print a warning if we find any
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trailing_junk = lines[len(lines) - reverse_end_offset:]
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for line in trailing_junk:
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if line.strip():
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warnings.append('Module invocation had junk after the JSON data: %s' % '\n'.join(trailing_junk))
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break
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lines = lines[:(len(lines) - reverse_end_offset)]
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return ('\n'.join(lines), warnings)
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