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# Copyright 2017 Red Hat Inc & Xena Networks.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Contributors:
# Dan Amzulescu, Xena Networks
# Christian Trautman, Red Hat Inc.
"""JSON utility module"""
import base64
import json
import locale
import logging
import uuid
_LOGGER = logging.getLogger(__name__)
_LOCALE = locale.getlocale()[1]
def create_segment(header_type, encode_64_string):
"""
Create segment for JSON file
:param header_type: Type of header as string
:param encode_64_string: 64 byte encoded string value of the hex bytes
:return: segment as dictionary
"""
return {
"SegmentType": header_type.upper(),
"SegmentValue": encode_64_string,
"ItemID": str(uuid.uuid4()),
"ParentID": "",
"Label": ""}
def decode_byte_array(enc_str):
""" Decodes the base64-encoded string to a byte array
:param enc_str: The base64-encoded string representing a byte array
:return: The decoded byte array
"""
dec_string = base64.b64decode(enc_str)
barray = bytearray()
barray.extend(dec_string)
return barray
def encode_byte_array(byte_arr):
""" Encodes the byte array as a base64-encoded string
:param byte_arr: A bytearray containing the bytes to convert
:return: A base64 encoded string
"""
enc_string = base64.b64encode(bytes(byte_arr))
return enc_string
def read_json_file(json_file):
"""
Read the json file path and return a dictionary of the data
:param json_file: path to json file
:return: dictionary of json data
"""
try:
with open(json_file, 'r', encoding=_LOCALE) as data_file:
file_data = json.loads(data_file.read())
except ValueError as exc:
# general json exception, Python 3.5 adds new exception type
_LOGGER.exception("Exception with json read: %s", exc)
raise
except IOError as exc:
_LOGGER.exception(
'Exception during file open: %s file=%s', exc, json_file)
raise
return file_data
def write_json_file(json_data, output_path):
"""
Write out the dictionary of data to a json file
:param json_data: dictionary of json data
:param output_path: file path to write output
:return: Boolean if success
"""
try:
with open(output_path, 'w', encoding=_LOCALE) as fileh:
json.dump(json_data, fileh, indent=2, sort_keys=True,
ensure_ascii=True)
return True
except ValueError as exc:
# general json exception, Python 3.5 adds new exception type
_LOGGER.exception(
"Exception with json write: %s", exc)
return False
except IOError as exc:
_LOGGER.exception(
'Exception during file write: %s file=%s', exc, output_path)
return False
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