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mocket.py
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mocket.py
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from __future__ import unicode_literals
import collections
import hashlib
import io
import json
import os
import select
import socket
import ssl
from datetime import datetime, timedelta
import decorator
import hexdump
import urllib3
from urllib3.util.ssl_ import ssl_wrap_socket as urllib3_ssl_wrap_socket
from urllib3.util.ssl_ import wrap_socket as urllib3_wrap_socket
from .compat import (
FileNotFoundError,
JSONDecodeError,
basestring,
byte_type,
decode_from_bytes,
encode_to_bytes,
text_type,
)
from .utils import SSL_PROTOCOL, MocketSocketCore, wrap_ssl_socket
xxh32 = None
try:
from xxhash import xxh32
except ImportError: # pragma: no cover
try:
from xxhash_cffi import xxh32
except ImportError:
pass
hasher = xxh32 or hashlib.md5
try: # pragma: no cover
from urllib3.contrib.pyopenssl import inject_into_urllib3, extract_from_urllib3
pyopenssl_override = True
except ImportError:
pyopenssl_override = False
true_socket = socket.socket
true_create_connection = socket.create_connection
true_gethostbyname = socket.gethostbyname
true_gethostname = socket.gethostname
true_getaddrinfo = socket.getaddrinfo
true_ssl_wrap_socket = ssl.wrap_socket
true_ssl_socket = ssl.SSLSocket
true_ssl_context = ssl.SSLContext
true_inet_pton = socket.inet_pton
true_urllib3_wrap_socket = urllib3_wrap_socket
true_urllib3_ssl_wrap_socket = urllib3_ssl_wrap_socket
class SuperFakeSSLContext(object):
""" For Python 3.6 """
class FakeSetter(int):
def __set__(self, *args):
pass
options = FakeSetter()
verify_mode = FakeSetter(ssl.CERT_OPTIONAL)
class FakeSSLContext(SuperFakeSSLContext):
sock = None
post_handshake_auth = None
def __init__(self, sock=None, server_hostname=None, _context=None, *args, **kwargs):
if isinstance(sock, MocketSocket):
self.sock = sock
self.sock._host = server_hostname
if true_ssl_context:
self.sock.true_socket = true_ssl_socket(
sock=self.sock.true_socket,
server_hostname=server_hostname,
_context=true_ssl_context(protocol=SSL_PROTOCOL),
)
else: # Python 2.
self.sock.true_socket = true_ssl_socket(sock=self.sock.true_socket)
elif isinstance(sock, int) and true_ssl_context:
self.context = true_ssl_context(sock)
@staticmethod
def load_default_certs(*args, **kwargs):
pass
@staticmethod
def wrap_socket(sock=sock, *args, **kwargs):
sock.kwargs = kwargs
sock._secure_socket = True
return sock
def wrap_bio(self, incoming, outcoming, *args, **kwargs):
ssl_obj = MocketSocket()
ssl_obj._host = kwargs["server_hostname"]
return ssl_obj
def __getattr__(self, name):
return getattr(self.sock, name)
def create_connection(
address, timeout=socket._GLOBAL_DEFAULT_TIMEOUT, source_address=None
):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, socket.IPPROTO_TCP)
if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
s.settimeout(timeout)
# if source_address:
# s.bind(source_address)
s.connect(address)
return s
def _hash_request(h, req):
return h(encode_to_bytes("".join(sorted(req.split("\r\n"))))).hexdigest()
class MocketSocket(object):
fd = None
family = None
type = None
proto = None
_host = None
_port = None
_address = None
cipher = lambda s: ("ADH", "AES256", "SHA")
compression = lambda s: ssl.OP_NO_COMPRESSION
_mode = None
_bufsize = None
_secure_socket = False
def __init__(
self, family=socket.AF_INET, type=socket.SOCK_STREAM, proto=0, *args, **kwargs
):
self.settimeout(socket._GLOBAL_DEFAULT_TIMEOUT)
self.true_socket = true_socket(family, type, proto)
self._connected = False
self._buflen = 65536
self._entry = None
self.family = int(family)
self.type = int(type)
self.proto = int(proto)
self._truesocket_recording_dir = None
self.kwargs = kwargs
sock = kwargs.get("sock")
if sock is not None:
self.__dict__ = dict(sock.__dict__)
self.true_socket = wrap_ssl_socket(
true_ssl_socket,
self.true_socket,
true_ssl_context(protocol=SSL_PROTOCOL),
)
def __unicode__(self): # pragma: no cover
return str(self)
def __str__(self): # pragma: no cover
return "({})(family={} type={} protocol={})".format(
self.__class__.__name__, self.family, self.type, self.proto
)
def gettimeout(self):
return self.timeout
def setsockopt(self, family, type, proto):
self.family = family
self.type = type
self.proto = proto
if self.true_socket:
self.true_socket.setsockopt(family, type, proto)
def settimeout(self, timeout):
try:
self.timeout = timeout
except AttributeError: # pragma: no cover
pass
def getsockopt(self, level, optname, buflen=None):
return socket.SOCK_STREAM
def do_handshake(self):
pass
def getpeername(self):
return self._address
def setblocking(self, block):
self.settimeout(None) if block else self.settimeout(0.0)
def getsockname(self):
return socket.gethostbyname(self._address[0]), self._address[1]
def getpeercert(self, *args, **kwargs):
if not (self._host and self._port):
self._address = self._host, self._port = Mocket._address
now = datetime.now()
shift = now + timedelta(days=30 * 12)
return {
"notAfter": shift.strftime("%b %d %H:%M:%S GMT"),
"subjectAltName": (
("DNS", "*.%s" % self._host),
("DNS", self._host),
("DNS", "*"),
),
"subject": (
(("organizationName", "*.%s" % self._host),),
(("organizationalUnitName", "Domain Control Validated"),),
(("commonName", "*.%s" % self._host),),
),
}
def unwrap(self):
return self
def write(self, data):
return self.send(encode_to_bytes(data))
def fileno(self):
Mocket.r_fd, Mocket.w_fd = os.pipe()
return Mocket.r_fd
def connect(self, address):
self._address = self._host, self._port = address
Mocket._address = address
def makefile(self, mode="r", bufsize=-1):
self._mode = mode
self._bufsize = bufsize
return self.fd
def get_entry(self, data):
return Mocket.get_entry(self._host, self._port, data)
def sendall(self, data, entry=None, *args, **kwargs):
if entry is None:
entry = self.get_entry(data)
if entry:
entry.collect(data)
response = entry.get_response()
else:
response = self.true_sendall(data, *args, **kwargs)
self.fd = MocketSocketCore()
self.fd.seek(0)
self.fd.write(response)
self.fd.truncate()
self.fd.seek(0)
def read(self, buffersize):
return self.fd.read(buffersize)
def recv_into(self, buffer, buffersize=None, flags=None):
return buffer.write(self.fd.read(buffersize))
def recv(self, buffersize, flags=None):
if Mocket.r_fd and Mocket.w_fd:
return os.read(Mocket.r_fd, buffersize)
return self.fd.read(buffersize)
def true_sendall(self, data, *args, **kwargs):
req = decode_from_bytes(data)
# make request unique again
req_signature = _hash_request(hasher, req)
# port should be always a string
port = text_type(self._port)
# prepare responses dictionary
responses = dict()
if Mocket.get_truesocket_recording_dir():
path = os.path.join(
Mocket.get_truesocket_recording_dir(), Mocket.get_namespace() + ".json"
)
# check if there's already a recorded session dumped to a JSON file
try:
with io.open(path) as f:
responses = json.load(f)
# if not, create a new dictionary
except (FileNotFoundError, JSONDecodeError):
pass
try:
try:
response_dict = responses[self._host][port][req_signature]
except KeyError:
if hasher is not hashlib.md5:
# Fallback for backwards compatibility
req_signature = _hash_request(hashlib.md5, req)
response_dict = responses[self._host][port][req_signature]
else:
raise
except KeyError:
# preventing next KeyError exceptions
responses.setdefault(self._host, dict())
responses[self._host].setdefault(port, dict())
responses[self._host][port].setdefault(req_signature, dict())
response_dict = responses[self._host][port][req_signature]
# try to get the response from the dictionary
try:
try:
encoded_response = hexdump.dehex(response_dict["response"])
except TypeError: # pragma: no cover
# Python 2
encoded_response = hexdump.restore(
encode_to_bytes(response_dict["response"])
)
# if not available, call the real sendall
except KeyError:
host, port = Mocket._address
host = true_gethostbyname(host)
if isinstance(self.true_socket, true_socket) and self._secure_socket:
try:
self = MocketSocket(sock=self)
except TypeError:
ssl_context = self.kwargs.get("ssl_context")
server_hostname = self.kwargs.get("server_hostname")
self.true_socket = true_ssl_context.wrap_socket(
self=ssl_context,
sock=self.true_socket,
server_hostname=server_hostname,
)
try:
self.true_socket.connect((host, port))
except (OSError, socket.error, ValueError):
# already connected
pass
self.true_socket.sendall(data, *args, **kwargs)
encoded_response = b""
# https://github.com/kennethreitz/requests/blob/master/tests/testserver/server.py#L13
while True:
if not select.select(
[self.true_socket], [], [], 0.1
)[0] and encoded_response:
break
recv = self.true_socket.recv(self._buflen)
if not recv and encoded_response:
break
encoded_response += recv
# dump the resulting dictionary to a JSON file
if Mocket.get_truesocket_recording_dir():
# update the dictionary with request and response lines
response_dict["request"] = req
response_dict["response"] = hexdump.dump(encoded_response)
with io.open(path, mode="w") as f:
f.write(
decode_from_bytes(
json.dumps(responses, indent=4, sort_keys=True)
)
)
# response back to .sendall() which writes it to the Mocket socket and flush the BytesIO
return encoded_response
def send(self, data, *args, **kwargs): # pragma: no cover
entry = self.get_entry(data)
if entry and self._entry != entry:
self.sendall(data, entry=entry, *args, **kwargs)
else:
req = Mocket.last_request()
if hasattr(req, "add_data"):
req.add_data(decode_from_bytes(data))
self._entry = entry
return len(data)
def close(self):
self.fd = MocketSocketCore()
def __getattr__(self, name):
""" Do nothing catchall function, for methods like close() and shutdown() """
def do_nothing(*args, **kwargs):
pass
return do_nothing
class Mocket(object):
_entries = collections.defaultdict(list)
_requests = []
_namespace = text_type(id(_entries))
_truesocket_recording_dir = None
r_fd = None
w_fd = None
@classmethod
def register(cls, *entries):
for entry in entries:
cls._entries[entry.location].append(entry)
@classmethod
def get_entry(cls, host, port, data):
entries = cls._entries.get((host, port), [])
for entry in entries:
if entry.can_handle(data):
return entry
@classmethod
def collect(cls, data):
cls._requests.append(data)
@classmethod
def reset(cls):
cls.r_fd = None
cls.w_fd = None
cls._entries = collections.defaultdict(list)
cls._requests = []
@classmethod
def last_request(cls):
if cls._requests:
return cls._requests[-1]
@classmethod
def remove_last_request(cls):
if cls._requests:
del cls._requests[-1]
@classmethod
def has_requests(cls):
return len(cls._requests) > 0
@staticmethod
def enable(namespace=None, truesocket_recording_dir=None):
Mocket._namespace = namespace
Mocket._truesocket_recording_dir = truesocket_recording_dir
if truesocket_recording_dir:
# JSON dumps will be saved here
assert os.path.isdir(truesocket_recording_dir)
socket.socket = socket.__dict__["socket"] = MocketSocket
socket._socketobject = socket.__dict__["_socketobject"] = MocketSocket
socket.SocketType = socket.__dict__["SocketType"] = MocketSocket
socket.create_connection = socket.__dict__[
"create_connection"
] = create_connection
socket.gethostname = socket.__dict__["gethostname"] = lambda: "localhost"
socket.gethostbyname = socket.__dict__[
"gethostbyname"
] = lambda host: "127.0.0.1"
socket.getaddrinfo = socket.__dict__[
"getaddrinfo"
] = lambda host, port, family=None, socktype=None, proto=None, flags=None: [
(2, 1, 6, "", (host, port))
]
ssl.wrap_socket = ssl.__dict__["wrap_socket"] = FakeSSLContext.wrap_socket
# ssl.SSLSocket = ssl.__dict__["SSLSocket"] = MocketSocket
ssl.SSLContext = ssl.__dict__["SSLContext"] = FakeSSLContext
socket.inet_pton = socket.__dict__["inet_pton"] = lambda family, ip: byte_type(
"\x7f\x00\x00\x01", "utf-8"
)
urllib3.util.ssl_.wrap_socket = urllib3.util.ssl_.__dict__[
"wrap_socket"
] = FakeSSLContext.wrap_socket
urllib3.util.ssl_.ssl_wrap_socket = urllib3.util.ssl_.__dict__[
"ssl_wrap_socket"
] = FakeSSLContext.wrap_socket
urllib3.connection.ssl_wrap_socket = urllib3.connection.__dict__[
"ssl_wrap_socket"
] = FakeSSLContext.wrap_socket
if pyopenssl_override: # pragma: no cover
# Take out the pyopenssl version - use the default implementation
extract_from_urllib3()
@staticmethod
def disable():
socket.socket = socket.__dict__["socket"] = true_socket
socket._socketobject = socket.__dict__["_socketobject"] = true_socket
socket.SocketType = socket.__dict__["SocketType"] = true_socket
socket.create_connection = socket.__dict__[
"create_connection"
] = true_create_connection
socket.gethostname = socket.__dict__["gethostname"] = true_gethostname
socket.gethostbyname = socket.__dict__["gethostbyname"] = true_gethostbyname
socket.getaddrinfo = socket.__dict__["getaddrinfo"] = true_getaddrinfo
ssl.wrap_socket = ssl.__dict__["wrap_socket"] = true_ssl_wrap_socket
# ssl.SSLSocket = ssl.__dict__["SSLSocket"] = true_ssl_socket
ssl.SSLContext = ssl.__dict__["SSLContext"] = true_ssl_context
socket.inet_pton = socket.__dict__["inet_pton"] = true_inet_pton
urllib3.util.ssl_.wrap_socket = urllib3.util.ssl_.__dict__[
"wrap_socket"
] = true_urllib3_wrap_socket
urllib3.util.ssl_.ssl_wrap_socket = urllib3.util.ssl_.__dict__[
"ssl_wrap_socket"
] = true_urllib3_ssl_wrap_socket
urllib3.connection.ssl_wrap_socket = urllib3.connection.__dict__[
"ssl_wrap_socket"
] = true_urllib3_ssl_wrap_socket
Mocket.reset()
if pyopenssl_override: # pragma: no cover
# Put the pyopenssl version back in place
inject_into_urllib3()
@classmethod
def get_namespace(cls):
return cls._namespace
@classmethod
def get_truesocket_recording_dir(cls):
return cls._truesocket_recording_dir
class MocketEntry(object):
class Response(byte_type):
@property
def data(self):
return self
request_cls = str
response_cls = Response
def __init__(self, location, responses):
self.location = location
self.response_index = 0
if not isinstance(responses, collections.Iterable) or isinstance(
responses, basestring
):
responses = [responses]
lresponses = []
for r in responses:
if not getattr(r, "data", False):
if isinstance(r, text_type):
r = encode_to_bytes(r)
r = self.response_cls(r)
lresponses.append(r)
else:
if not responses:
lresponses = [self.response_cls(encode_to_bytes(""))]
self.responses = lresponses
def can_handle(self, data):
return True
def collect(self, data):
req = self.request_cls(data)
Mocket.collect(req)
def get_response(self):
response = self.responses[self.response_index]
if self.response_index < len(self.responses) - 1:
self.response_index += 1
return response.data
class Mocketizer(object):
def __init__(self, instance=None, namespace=None, truesocket_recording_dir=None):
self.instance = instance
self.truesocket_recording_dir = truesocket_recording_dir
self.namespace = namespace or text_type(id(self))
def __enter__(self):
Mocket.enable(
namespace=self.namespace,
truesocket_recording_dir=self.truesocket_recording_dir,
)
if self.instance:
self.check_and_call("mocketize_setup")
def __exit__(self, type, value, tb):
if self.instance:
self.check_and_call("mocketize_teardown")
Mocket.disable()
def check_and_call(self, method):
method = getattr(self.instance, method, None)
if callable(method):
method()
@staticmethod
def wrap(test=None, truesocket_recording_dir=None):
def wrapper(t, *args, **kw):
instance = args[0] if args else None
namespace = ".".join(
(instance.__class__.__module__, instance.__class__.__name__, t.__name__)
)
with Mocketizer(
instance,
namespace=namespace,
truesocket_recording_dir=truesocket_recording_dir,
):
t(*args, **kw)
return wrapper
return decorator.decorator(wrapper, test)
mocketize = Mocketizer.wrap