121 lines
3 KiB
Python
121 lines
3 KiB
Python
import base64
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import datetime
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import distutils.version
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import logging
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import json
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import random
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import os
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import socket
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import yaml
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from lbrynet.conf import settings
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from lbrynet.conf import AdjustableSettings
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from lbrynet.core.cryptoutils import get_lbry_hash_obj
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# digest_size is in bytes, and blob hashes are hex encoded
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blobhash_length = get_lbry_hash_obj().digest_size * 2
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log = logging.getLogger(__name__)
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# defining these time functions here allows for easier overriding in testing
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def now():
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return datetime.datetime.now()
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def utcnow():
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return datetime.datetime.utcnow()
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def isonow():
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"""Return utc now in isoformat with timezone"""
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return utcnow().isoformat() + 'Z'
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def today():
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return datetime.datetime.today()
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def generate_id(num=None):
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h = get_lbry_hash_obj()
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if num is not None:
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h.update(str(num))
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else:
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h.update(str(random.getrandbits(512)))
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return h.digest()
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def is_valid_hashcharacter(char):
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return char in "0123456789abcdef"
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def is_valid_blobhash(blobhash):
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"""Checks whether the blobhash is the correct length and contains only
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valid characters (0-9, a-f)
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@param blobhash: string, the blobhash to check
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@return: True/False
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"""
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return len(blobhash) == blobhash_length and all(is_valid_hashcharacter(l) for l in blobhash)
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def version_is_greater_than(a, b):
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"""Returns True if version a is more recent than version b"""
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try:
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return distutils.version.StrictVersion(a) > distutils.version.StrictVersion(b)
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except ValueError:
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return distutils.version.LooseVersion(a) > distutils.version.LooseVersion(b)
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def deobfuscate(obfustacated):
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return base64.b64decode(obfustacated.decode('rot13'))
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def obfuscate(plain):
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return base64.b64encode(plain).encode('rot13')
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settings_decoders = {
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'.json': json.loads,
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'.yml': yaml.load
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}
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settings_encoders = {
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'.json': json.dumps,
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'.yml': yaml.safe_dump
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}
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ADJUSTABLE_SETTINGS = AdjustableSettings().get_dict()
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def load_settings(path):
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ext = os.path.splitext(path)[1]
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with open(path, 'r') as settings_file:
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data = settings_file.read()
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decoder = settings_decoders.get(ext, False)
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assert decoder is not False, "Unknown settings format .%s" % ext
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return decoder(data)
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def save_settings(path):
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to_save = {k: v for k, v in settings.__dict__.iteritems() if k in ADJUSTABLE_SETTINGS}
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ext = os.path.splitext(path)[1]
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encoder = settings_encoders.get(ext, False)
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assert encoder is not False, "Unknown settings format .%s" % ext
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with open(path, 'w') as settings_file:
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settings_file.write(encoder(to_save))
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def check_connection(server="www.lbry.io", port=80):
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"""Attempts to open a socket to server:port and returns True if successful."""
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try:
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host = socket.gethostbyname(server)
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s = socket.create_connection((host, port), 2)
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return True
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except Exception as ex:
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log.info(
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"Failed to connect to %s:%s. Maybe the internet connection is not working",
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server, port, exc_info=True)
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return False
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