forked from LBRYCommunity/lbry-sdk
107 lines
2.6 KiB
Python
107 lines
2.6 KiB
Python
import base64
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import datetime
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import logging
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import random
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import os
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import socket
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import string
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import sys
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import pkg_resources
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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 timedelta(**kwargs):
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return datetime.timedelta(**kwargs)
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def datetime_obj(*args, **kwargs):
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return datetime.datetime(*args, **kwargs)
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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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return pkg_resources.parse_version(a) > pkg_resources.parse_version(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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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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log.debug('Checking connection to %s:%s', server, port)
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host = socket.gethostbyname(server)
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s = socket.create_connection((host, port), 2)
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log.debug('Connection successful')
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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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def setup_certs_for_windows():
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if getattr(sys, 'frozen', False) and os.name == "nt":
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cert_path = os.path.join(os.path.dirname(sys.executable), "cacert.pem")
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os.environ["REQUESTS_CA_BUNDLE"] = cert_path
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def random_string(length=10, chars=string.ascii_lowercase):
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return ''.join([random.choice(chars) for _ in range(length)])
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