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import inspect
import queue
import sys
import time
import uuid
import warnings
from typing import Tuple, Any, List, Optional, Set
from ._server import FakeBaseConnectionMixin, FakeServer, VersionType, ServerType
if sys.version_info >= (3, 11):
from typing import Self
else:
from typing_extensions import Self
import redis
from fakeredis._fakesocket import FakeSocket
from fakeredis._helpers import FakeSelector
from . import _msgs as msgs
class FakeConnection(FakeBaseConnectionMixin, redis.Connection):
def connect(self) -> None:
super().connect()
# The selector is set in redis.Connection.connect() after _connect() is called
self._selector: Optional[FakeSelector] = FakeSelector(self._sock)
def _connect(self) -> FakeSocket:
if not self._server.connected:
raise redis.ConnectionError(msgs.CONNECTION_ERROR_MSG)
return FakeSocket(
self._server,
db=self.db,
lua_modules=self._lua_modules,
client_info=dict(
id=3,
addr="127.0.0.1:57275",
laddr="127.0.0.1:6379",
fd=8,
name="",
_created=int(time.time()),
idle=0,
flags="N",
db=0,
sub=0,
psub=0,
ssub=0,
multi=-1,
qbuf=48,
qbuf_free=16842,
argv_mem=25,
multi_mem=0,
rbs=1024,
rbp=0,
obl=0,
oll=0,
omem=0,
tot_mem=18737,
events="r",
cmd="auth",
user="default",
redir=-1,
resp=2,
),
)
def can_read(self, timeout: Optional[float] = 0) -> bool:
if not self._server.connected:
return True
if not self._sock:
self.connect()
# We use check_can_read rather than can_read, because on redis-py<3.2,
# FakeSelector inherits from a stub BaseSelector which doesn't
# implement can_read. Normally can_read provides retries on EINTR,
# but that's not necessary for the implementation of
# FakeSelector.check_can_read.
return self._selector is not None and self._selector.check_can_read(timeout)
def _decode(self, response: Any) -> Any:
if isinstance(response, list):
return [self._decode(item) for item in response]
elif isinstance(response, bytes):
return self.encoder.decode(response)
else:
return response
def read_response(self, **kwargs: Any) -> Any: # type: ignore
if not self._sock:
raise redis.ConnectionError(msgs.CONNECTION_ERROR_MSG)
if not self._server.connected:
try:
response = self._sock.responses.get_nowait()
except queue.Empty:
if kwargs.get("disconnect_on_error", True):
self.disconnect()
raise redis.ConnectionError(msgs.CONNECTION_ERROR_MSG)
else:
response = self._sock.responses.get()
if isinstance(response, (redis.ResponseError, redis.AuthenticationError)):
raise response
if kwargs.get("disable_decoding", False):
return response
else:
return self._decode(response)
def repr_pieces(self) -> List[Tuple[str, Any]]:
pieces = [("server", self._server), ("db", self.db)]
if self.client_name:
pieces.append(("client_name", self.client_name))
return pieces
def __str__(self) -> str:
return self.server_key
class FakeRedisMixin:
def __init__(
self,
*args: Any,
server: Optional[FakeServer] = None,
version: VersionType = (7,),
server_type: ServerType = "redis",
lua_modules: Optional[Set[str]] = None,
**kwargs: Any,
) -> None:
# Interpret the positional and keyword arguments according to the
# version of redis in use.
parameters = list(inspect.signature(redis.Redis.__init__).parameters.values())[1:]
# Convert args => kwargs
kwargs.update({parameters[i].name: args[i] for i in range(len(args))})
kwargs.setdefault("host", uuid.uuid4().hex)
kwds = {
p.name: kwargs.get(p.name, p.default)
for ind, p in enumerate(parameters)
if p.default != inspect.Parameter.empty
}
kwds["server"] = server
if not kwds.get("connection_pool", None):
charset = kwds.get("charset", None)
errors = kwds.get("errors", None)
# Adapted from redis-py
if charset is not None:
warnings.warn(DeprecationWarning('"charset" is deprecated. Use "encoding" instead'))
kwds["encoding"] = charset
if errors is not None:
warnings.warn(DeprecationWarning('"errors" is deprecated. Use "encoding_errors" instead'))
kwds["encoding_errors"] = errors
conn_pool_args = {
"host",
"port",
"db",
"username",
"password",
"socket_timeout",
"encoding",
"encoding_errors",
"decode_responses",
"retry_on_timeout",
"max_connections",
"health_check_interval",
"client_name",
"connected",
"server",
}
connection_kwargs = {
"connection_class": FakeConnection,
"version": version,
"server_type": server_type,
"lua_modules": lua_modules,
}
connection_kwargs.update({arg: kwds[arg] for arg in conn_pool_args if arg in kwds})
kwds["connection_pool"] = redis.connection.ConnectionPool(**connection_kwargs) # type: ignore
kwds.pop("server", None)
kwds.pop("connected", None)
kwds.pop("version", None)
kwds.pop("server_type", None)
kwds.pop("lua_modules", None)
super().__init__(**kwds)
@classmethod
def from_url(cls, *args: Any, **kwargs: Any) -> Self:
kwargs.setdefault("version", "7.4")
kwargs.setdefault("server_type", "redis")
pool = redis.ConnectionPool.from_url(*args, **kwargs)
# Now override how it creates connections
pool.connection_class = FakeConnection
return cls(connection_pool=pool, *args, **kwargs)
class FakeStrictRedis(FakeRedisMixin, redis.StrictRedis): # type: ignore
pass
class FakeRedis(FakeRedisMixin, redis.Redis): # type: ignore
pass
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