ansible/lib/ansible/module_utils/json_utils.py
Dag Wieers 5553b20828 Collated PEP8 fixes (#25293)
- Make PEP8 compliant
2017-06-02 12:14:11 +01:00

79 lines
3.3 KiB
Python

# This code is part of Ansible, but is an independent component.
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#
try:
import json
except ImportError:
import simplejson as json
# NB: a copy of this function exists in ../../modules/core/async_wrapper.py. Ensure any
# changes are propagated there.
def _filter_non_json_lines(data):
'''
Used to filter unrelated output around module JSON output, like messages from
tcagetattr, or where dropbear spews MOTD on every single command (which is nuts).
Filters leading lines before first line-starting occurrence of '{' or '[', and filter all
trailing lines after matching close character (working from the bottom of output).
'''
warnings = []
# Filter initial junk
lines = data.splitlines()
for start, line in enumerate(lines):
line = line.strip()
if line.startswith(u'{'):
endchar = u'}'
break
elif line.startswith(u'['):
endchar = u']'
break
else:
raise ValueError('No start of json char found')
# Filter trailing junk
lines = lines[start:]
for reverse_end_offset, line in enumerate(reversed(lines)):
if line.strip().endswith(endchar):
break
else:
raise ValueError('No end of json char found')
if reverse_end_offset > 0:
# Trailing junk is uncommon and can point to things the user might
# want to change. So print a warning if we find any
trailing_junk = lines[len(lines) - reverse_end_offset:]
for line in trailing_junk:
if line.strip():
warnings.append('Module invocation had junk after the JSON data: %s' % '\n'.join(trailing_junk))
break
lines = lines[:(len(lines) - reverse_end_offset)]
return ('\n'.join(lines), warnings)