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import sys
import logging
import abc
from ..exceptions import CloudflareSolveError
if sys.version_info >= (3, 4):
ABC = abc.ABC # noqa
else:
ABC = abc.ABCMeta('ABC', (), {})
# ------------------------------------------------------------------------------- #
interpreters = {}
# ------------------------------------------------------------------------------- #
class JavaScriptInterpreter(ABC):
# ------------------------------------------------------------------------------- #
@abc.abstractmethod
def __init__(self, name):
interpreters[name] = self
# ------------------------------------------------------------------------------- #
@classmethod
def dynamicImport(cls, name):
if name not in interpreters:
try:
__import__('{}.{}'.format(cls.__module__, name))
if not isinstance(interpreters.get(name), JavaScriptInterpreter):
raise ImportError('The interpreter was not initialized.')
except ImportError:
logging.error('Unable to load {} interpreter'.format(name))
raise
return interpreters[name]
# ------------------------------------------------------------------------------- #
@abc.abstractmethod
def eval(self, jsEnv, js):
pass
# ------------------------------------------------------------------------------- #
def solveChallenge(self, body, domain):
try:
return '{0:.10f}'.format(float(self.eval(body, domain)))
except Exception:
raise CloudflareSolveError(
'Error trying to solve Cloudflare IUAM Javascript, they may have changed their technique.'
)
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