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116 lines
3.9 KiB
116 lines
3.9 KiB
#
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###############################################################################
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# Copyright (C) 2020 Simon Adlem, G7RZU <g7rzu@gb7fr.org.uk>
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# Copyright (C) 2016-2019 Cortney T. Buffington, N0MJS <n0mjs@me.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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###############################################################################
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#Some utilty functions from dmr_utils3 have been modified. These live here.
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# Also new FreeDMR specific functions.
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import ssl
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from time import time
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from os.path import isfile, getmtime
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from urllib.request import urlopen
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from json import load as jload, dump as jdump
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import hashlib
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#Use this try_download instead of that from dmr_utils3
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def try_download(_path, _file, _url, _stale,):
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no_verify = ssl._create_unverified_context()
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now = time()
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file_exists = isfile(''.join([_path,_file])) == True
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if file_exists:
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file_old = (getmtime(''.join([_path,_file])) + _stale) < now
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if not file_exists or (file_exists and file_old):
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try:
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with urlopen(_url, context=no_verify) as response:
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data = response.read()
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#outfile.write(data)
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response.close()
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result = 'ID ALIAS MAPPER: \'{}\' successfully downloaded'.format(_file)
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except IOError:
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result = 'ID ALIAS MAPPER: \'{}\' could not be downloaded due to an IOError'.format(_file)
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else:
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if data and (data != b'{}'):
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try:
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with open(''.join([_path,_file]), 'wb') as outfile:
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outfile.write(data)
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outfile.close()
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except IOError:
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result = 'ID ALIAS mapper \'{}\' file could not be written due to an IOError'.format(_file)
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else:
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result = 'ID ALIAS mapper \'{}\' file not written because downloaded data is empty for some reason'.format(_file)
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else:
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result = 'ID ALIAS MAPPER: \'{}\' is current, not downloaded'.format(_file)
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return result
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# SHORT VERSION - MAKES A SIMPLE {INTEGER ID: 'CALLSIGN'} DICTIONARY
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def mk_id_dict(_path, _file):
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_dict = {}
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try:
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with open(_path+_file, 'r', encoding='latin1') as _handle:
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records = jload(_handle)
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if 'count' in [*records]:
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records.pop('count')
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records = records[[*records][0]]
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_handle.close
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for record in records:
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try:
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_dict[int(record['id'])] = record['callsign']
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except:
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pass
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return _dict
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except:
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raise
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#Read JSON from file
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def load_json(filename):
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try:
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with open(filename) as f:
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data = jload(f)
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except:
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raise
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else:
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return(data)
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def save_json(filename,data):
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try:
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with open(filename, 'w', encoding='utf-8') as f:
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jdump(data, f, ensure_ascii=False, indent=4)
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except:
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raise
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else:
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return(True)
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#Calculate blake2b checksum of file
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def blake2bsum(filename):
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blake2b_hash = hashlib.blake2b()
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try:
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with open(filename,"rb") as f:
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for byte_block in iter(lambda: f.read(4096),b""):
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blake2b_hash.update(byte_block)
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return(blake2b_hash.hexdigest())
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except:
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raise
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