a7ef8889dd
* Added new custom cli class using aiohttp * Proper error handling in CLI based on RPC error codes(PoC) * Auth API working * UnitTests
249 lines
7.4 KiB
Python
249 lines
7.4 KiB
Python
import base64
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import codecs
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import datetime
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import random
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import socket
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import string
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import json
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import traceback
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import functools
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import logging
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import pkg_resources
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from twisted.python.failure import Failure
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from twisted.internet import defer
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from lbryschema.claim import ClaimDict
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from lbrynet.core.cryptoutils import get_lbry_hash_obj
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log = logging.getLogger(__name__)
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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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# 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 call_later(delay, func, *args, **kwargs):
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# Import here to ensure that it gets called after installing a reactor
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# see: http://twistedmatrix.com/documents/current/core/howto/choosing-reactor.html
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from twisted.internet import reactor
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return reactor.callLater(delay, func, *args, **kwargs)
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def safe_start_looping_call(looping_call, interval_sec):
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if not looping_call.running:
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looping_call.start(interval_sec)
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def safe_stop_looping_call(looping_call):
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if looping_call.running:
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looping_call.stop()
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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).encode())
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else:
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h.update(str(random.getrandbits(512)).encode())
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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 rot13(some_str):
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return codecs.encode(some_str, 'rot_13')
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def deobfuscate(obfustacated):
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return base64.b64decode(rot13(obfustacated))
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def obfuscate(plain):
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return rot13(base64.b64encode(plain).decode())
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def check_connection(server="lbry.io", port=80, timeout=5):
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"""Attempts to open a socket to server:port and returns True if successful."""
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log.debug('Checking connection to %s:%s', server, port)
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try:
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server = socket.gethostbyname(server)
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socket.create_connection((server, port), timeout)
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log.debug('Connection successful')
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return True
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except (socket.gaierror, socket.herror) as ex:
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log.warning("Failed to connect to %s:%s. Unable to resolve domain. Trying to bypass DNS",
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server, port)
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try:
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server = "8.8.8.8"
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port = 53
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socket.create_connection((server, port), timeout)
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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.error("Failed to connect to %s:%s. Maybe the internet connection is not working",
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server, port)
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return False
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except Exception as ex:
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log.error("Failed to connect to %s:%s. Maybe the internet connection is not working",
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server, port)
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return False
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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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def short_hash(hash_str):
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return hash_str[:6]
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def get_sd_hash(stream_info):
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if not stream_info:
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return None
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if isinstance(stream_info, ClaimDict):
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return stream_info.source_hash
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result = stream_info.get('claim', {}).\
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get('value', {}).\
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get('stream', {}).\
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get('source', {}).\
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get('source')
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if not result:
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log.warning("Unable to get sd_hash")
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return result
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def json_dumps_pretty(obj, **kwargs):
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return json.dumps(obj, sort_keys=True, indent=2, separators=(',', ': '), **kwargs)
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class DeferredLockContextManager:
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def __init__(self, lock):
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self._lock = lock
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def __enter__(self):
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yield self._lock.aquire()
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def __exit__(self, exc_type, exc_val, exc_tb):
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yield self._lock.release()
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@defer.inlineCallbacks
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def DeferredDict(d, consumeErrors=False):
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keys = []
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dl = []
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response = {}
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for k, v in d.items():
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keys.append(k)
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dl.append(v)
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results = yield defer.DeferredList(dl, consumeErrors=consumeErrors)
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for k, (success, result) in zip(keys, results):
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if success:
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response[k] = result
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defer.returnValue(response)
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class DeferredProfiler:
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def __init__(self):
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self.profile_results = {}
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def add_result(self, fn, start_time, finished_time, stack, success):
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self.profile_results[fn].append((start_time, finished_time, stack, success))
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def show_profile_results(self, fn):
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profile_results = list(self.profile_results[fn])
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call_counts = {
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caller: [(start, finished, finished - start, success)
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for (start, finished, _caller, success) in profile_results
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if _caller == caller]
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for caller in set(result[2] for result in profile_results)
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}
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log.info("called %s %i times from %i sources\n", fn.__name__, len(profile_results), len(call_counts))
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for caller in sorted(list(call_counts.keys()), key=lambda c: len(call_counts[c]), reverse=True):
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call_info = call_counts[caller]
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times = [r[2] for r in call_info]
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own_time = sum(times)
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times.sort()
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longest = 0 if not times else times[-1]
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shortest = 0 if not times else times[0]
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log.info(
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"%i successes and %i failures\nlongest %f, shortest %f, avg %f\ncaller:\n%s",
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len([r for r in call_info if r[3]]),
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len([r for r in call_info if not r[3]]),
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longest, shortest, own_time / float(len(call_info)), caller
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)
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def profiled_deferred(self, reactor=None):
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if not reactor:
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from twisted.internet import reactor
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def _cb(result, fn, start, caller_info):
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if isinstance(result, (Failure, Exception)):
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error = result
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result = None
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else:
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error = None
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self.add_result(fn, start, reactor.seconds(), caller_info, error is None)
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if error is None:
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return result
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raise error
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def _profiled_deferred(fn):
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reactor.addSystemEventTrigger("after", "shutdown", self.show_profile_results, fn)
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self.profile_results[fn] = []
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@functools.wraps(fn)
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def _wrapper(*args, **kwargs):
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caller_info = "".join(traceback.format_list(traceback.extract_stack()[-3:-1]))
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start = reactor.seconds()
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d = defer.maybeDeferred(fn, *args, **kwargs)
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d.addBoth(_cb, fn, start, caller_info)
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return d
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return _wrapper
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return _profiled_deferred
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_profiler = DeferredProfiler()
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profile_deferred = _profiler.profiled_deferred
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