/usr/lib/python2.7/dist-packages/gevent/_socket2.py is in python-gevent 1.2.2-2.
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"""
Python 2 socket module.
"""
# Our import magic sadly makes this warning useless
# pylint: disable=undefined-variable
import time
from gevent import _socketcommon
from gevent._util import copy_globals
from gevent._compat import PYPY
copy_globals(_socketcommon, globals(),
names_to_ignore=_socketcommon.__py3_imports__ + _socketcommon.__extensions__,
dunder_names_to_keep=())
__socket__ = _socketcommon.__socket__
__implements__ = _socketcommon._implements
__extensions__ = _socketcommon.__extensions__
__imports__ = [i for i in _socketcommon.__imports__ if i not in _socketcommon.__py3_imports__]
__dns__ = _socketcommon.__dns__
try:
_fileobject = __socket__._fileobject
_socketmethods = __socket__._socketmethods
except AttributeError:
# Allow this module to be imported under Python 3
# for building the docs
_fileobject = object
_socketmethods = ('bind', 'connect', 'connect_ex',
'fileno', 'listen', 'getpeername',
'getsockname', 'getsockopt',
'setsockopt', 'sendall',
'setblocking', 'settimeout',
'gettimeout', 'shutdown')
else:
# Python 2 doesn't natively support with statements on _fileobject;
# but it eases our test cases if we can do the same with on both Py3
# and Py2. Implementation copied from Python 3
if not hasattr(_fileobject, '__enter__'):
# we could either patch in place:
#_fileobject.__enter__ = lambda self: self
#_fileobject.__exit__ = lambda self, *args: self.close() if not self.closed else None
# or we could subclass. subclassing has the benefit of not
# changing the behaviour of the stdlib if we're just imported; OTOH,
# under Python 2.6/2.7, test_urllib2net.py asserts that the class IS
# socket._fileobject (sigh), so we have to work around that.
class _fileobject(_fileobject): # pylint:disable=function-redefined
def __enter__(self):
return self
def __exit__(self, *args):
if not self.closed:
self.close()
def _get_memory(data):
try:
mv = memoryview(data)
if mv.shape:
return mv
# No shape, probably working with a ctypes object,
# or something else exotic that supports the buffer interface
return mv.tobytes()
except TypeError:
# fixes "python2.7 array.array doesn't support memoryview used in
# gevent.socket.send" issue
# (http://code.google.com/p/gevent/issues/detail?id=94)
return buffer(data)
class _closedsocket(object):
__slots__ = []
def _dummy(*args, **kwargs): # pylint:disable=no-method-argument,unused-argument
raise error(EBADF, 'Bad file descriptor')
# All _delegate_methods must also be initialized here.
send = recv = recv_into = sendto = recvfrom = recvfrom_into = _dummy
if PYPY:
def _drop(self):
pass
def _reuse(self):
pass
__getattr__ = _dummy
timeout_default = object()
class socket(object):
"""
gevent `socket.socket <https://docs.python.org/2/library/socket.html#socket-objects>`_
for Python 2.
This object should have the same API as the standard library socket linked to above. Not all
methods are specifically documented here; when they are they may point out a difference
to be aware of or may document a method the standard library does not.
"""
# pylint:disable=too-many-public-methods
def __init__(self, family=AF_INET, type=SOCK_STREAM, proto=0, _sock=None):
if _sock is None:
self._sock = _realsocket(family, type, proto)
self.timeout = _socket.getdefaulttimeout()
else:
if hasattr(_sock, '_sock'):
self._sock = _sock._sock
self.timeout = getattr(_sock, 'timeout', False)
if self.timeout is False:
self.timeout = _socket.getdefaulttimeout()
else:
self._sock = _sock
self.timeout = _socket.getdefaulttimeout()
if PYPY:
self._sock._reuse()
self._sock.setblocking(0)
fileno = self._sock.fileno()
self.hub = get_hub()
io = self.hub.loop.io
self._read_event = io(fileno, 1)
self._write_event = io(fileno, 2)
def __repr__(self):
return '<%s at %s %s>' % (type(self).__name__, hex(id(self)), self._formatinfo())
def __str__(self):
return '<%s %s>' % (type(self).__name__, self._formatinfo())
def _formatinfo(self):
# pylint:disable=broad-except
try:
fileno = self.fileno()
except Exception as ex:
fileno = str(ex)
try:
sockname = self.getsockname()
sockname = '%s:%s' % sockname
except Exception:
sockname = None
try:
peername = self.getpeername()
peername = '%s:%s' % peername
except Exception:
peername = None
result = 'fileno=%s' % fileno
if sockname is not None:
result += ' sock=' + str(sockname)
if peername is not None:
result += ' peer=' + str(peername)
if getattr(self, 'timeout', None) is not None:
result += ' timeout=' + str(self.timeout)
return result
def _get_ref(self):
return self._read_event.ref or self._write_event.ref
def _set_ref(self, value):
self._read_event.ref = value
self._write_event.ref = value
ref = property(_get_ref, _set_ref)
def _wait(self, watcher, timeout_exc=timeout('timed out')):
"""Block the current greenlet until *watcher* has pending events.
If *timeout* is non-negative, then *timeout_exc* is raised after *timeout* second has passed.
By default *timeout_exc* is ``socket.timeout('timed out')``.
If :func:`cancel_wait` is called, raise ``socket.error(EBADF, 'File descriptor was closed in another greenlet')``.
"""
if watcher.callback is not None:
raise _socketcommon.ConcurrentObjectUseError('This socket is already used by another greenlet: %r' % (watcher.callback, ))
if self.timeout is not None:
timeout = Timeout.start_new(self.timeout, timeout_exc, ref=False)
else:
timeout = None
try:
self.hub.wait(watcher)
finally:
if timeout is not None:
timeout.cancel()
def accept(self):
sock = self._sock
while True:
try:
client_socket, address = sock.accept()
break
except error as ex:
if ex.args[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
self._wait(self._read_event)
sockobj = socket(_sock=client_socket)
if PYPY:
client_socket._drop()
return sockobj, address
def close(self, _closedsocket=_closedsocket, cancel_wait_ex=cancel_wait_ex):
# This function should not reference any globals. See Python issue #808164.
self.hub.cancel_wait(self._read_event, cancel_wait_ex)
self.hub.cancel_wait(self._write_event, cancel_wait_ex)
s = self._sock
self._sock = _closedsocket()
if PYPY:
s._drop()
@property
def closed(self):
return isinstance(self._sock, _closedsocket)
def connect(self, address):
if self.timeout == 0.0:
return self._sock.connect(address)
sock = self._sock
if isinstance(address, tuple):
r = getaddrinfo(address[0], address[1], sock.family)
address = r[0][-1]
if self.timeout is not None:
timer = Timeout.start_new(self.timeout, timeout('timed out'))
else:
timer = None
try:
while True:
err = sock.getsockopt(SOL_SOCKET, SO_ERROR)
if err:
raise error(err, strerror(err))
result = sock.connect_ex(address)
if not result or result == EISCONN:
break
elif (result in (EWOULDBLOCK, EINPROGRESS, EALREADY)) or (result == EINVAL and is_windows):
self._wait(self._write_event)
else:
raise error(result, strerror(result))
finally:
if timer is not None:
timer.cancel()
def connect_ex(self, address):
try:
return self.connect(address) or 0
except timeout:
return EAGAIN
except error as ex:
if type(ex) is error: # pylint:disable=unidiomatic-typecheck
return ex.args[0]
else:
raise # gaierror is not silenced by connect_ex
def dup(self):
"""dup() -> socket object
Return a new socket object connected to the same system resource.
Note, that the new socket does not inherit the timeout."""
return socket(_sock=self._sock)
def makefile(self, mode='r', bufsize=-1):
# Two things to look out for:
# 1) Closing the original socket object should not close the
# socket (hence creating a new instance)
# 2) The resulting fileobject must keep the timeout in order
# to be compatible with the stdlib's socket.makefile.
# Pass self as _sock to preserve timeout.
fobj = _fileobject(type(self)(_sock=self), mode, bufsize)
if PYPY:
self._sock._drop()
return fobj
def recv(self, *args):
sock = self._sock # keeping the reference so that fd is not closed during waiting
while True:
try:
return sock.recv(*args)
except error as ex:
if ex.args[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
# QQQ without clearing exc_info test__refcount.test_clean_exit fails
sys.exc_clear()
self._wait(self._read_event)
def recvfrom(self, *args):
sock = self._sock
while True:
try:
return sock.recvfrom(*args)
except error as ex:
if ex.args[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
self._wait(self._read_event)
def recvfrom_into(self, *args):
sock = self._sock
while True:
try:
return sock.recvfrom_into(*args)
except error as ex:
if ex.args[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
self._wait(self._read_event)
def recv_into(self, *args):
sock = self._sock
while True:
try:
return sock.recv_into(*args)
except error as ex:
if ex.args[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
self._wait(self._read_event)
def send(self, data, flags=0, timeout=timeout_default):
sock = self._sock
if timeout is timeout_default:
timeout = self.timeout
try:
return sock.send(data, flags)
except error as ex:
if ex.args[0] != EWOULDBLOCK or timeout == 0.0:
raise
sys.exc_clear()
self._wait(self._write_event)
try:
return sock.send(data, flags)
except error as ex2:
if ex2.args[0] == EWOULDBLOCK:
return 0
raise
def __send_chunk(self, data_memory, flags, timeleft, end):
"""
Send the complete contents of ``data_memory`` before returning.
This is the core loop around :meth:`send`.
:param timeleft: Either ``None`` if there is no timeout involved,
or a float indicating the timeout to use.
:param end: Either ``None`` if there is no timeout involved, or
a float giving the absolute end time.
:return: An updated value for ``timeleft`` (or None)
:raises timeout: If ``timeleft`` was given and elapsed while
sending this chunk.
"""
data_sent = 0
len_data_memory = len(data_memory)
started_timer = 0
while data_sent < len_data_memory:
chunk = data_memory[data_sent:]
if timeleft is None:
data_sent += self.send(chunk, flags)
elif started_timer and timeleft <= 0:
# Check before sending to guarantee a check
# happens even if each chunk successfully sends its data
# (especially important for SSL sockets since they have large
# buffers). But only do this if we've actually tried to
# send something once to avoid spurious timeouts on non-blocking
# sockets.
raise timeout('timed out')
else:
started_timer = 1
data_sent += self.send(chunk, flags, timeout=timeleft)
timeleft = end - time.time()
return timeleft
def sendall(self, data, flags=0):
if isinstance(data, unicode):
data = data.encode()
# this sendall is also reused by gevent.ssl.SSLSocket subclass,
# so it should not call self._sock methods directly
data_memory = _get_memory(data)
len_data_memory = len(data_memory)
if not len_data_memory:
# Don't send empty data, can cause SSL EOFError.
# See issue 719
return 0
# On PyPy up through 2.6.0, subviews of a memoryview() object
# copy the underlying bytes the first time the builtin
# socket.send() method is called. On a non-blocking socket
# (that thus calls socket.send() many times) with a large
# input, this results in many repeated copies of an ever
# smaller string, depending on the networking buffering. For
# example, if each send() can process 1MB of a 50MB input, and
# we naively pass the entire remaining subview each time, we'd
# copy 49MB, 48MB, 47MB, etc, thus completely killing
# performance. To workaround this problem, we work in
# reasonable, fixed-size chunks. This results in a 10x
# improvement to bench_sendall.py, while having no measurable impact on
# CPython (since it doesn't copy at all the only extra overhead is
# a few python function calls, which is negligible for large inputs).
# See https://bitbucket.org/pypy/pypy/issues/2091/non-blocking-socketsend-slow-gevent
# Too small of a chunk (the socket's buf size is usually too
# small) results in reduced perf due to *too many* calls to send and too many
# small copies. With a buffer of 143K (the default on my system), for
# example, bench_sendall.py yields ~264MB/s, while using 1MB yields
# ~653MB/s (matching CPython). 1MB is arbitrary and might be better
# chosen, say, to match a page size?
chunk_size = max(self.getsockopt(SOL_SOCKET, SO_SNDBUF), 1024 * 1024) # pylint:disable=no-member
data_sent = 0
end = None
timeleft = None
if self.timeout is not None:
timeleft = self.timeout
end = time.time() + timeleft
while data_sent < len_data_memory:
chunk_end = min(data_sent + chunk_size, len_data_memory)
chunk = data_memory[data_sent:chunk_end]
timeleft = self.__send_chunk(chunk, flags, timeleft, end)
data_sent += len(chunk) # Guaranteed it sent the whole thing
def sendto(self, *args):
sock = self._sock
try:
return sock.sendto(*args)
except error as ex:
if ex.args[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
self._wait(self._write_event)
try:
return sock.sendto(*args)
except error as ex2:
if ex2.args[0] == EWOULDBLOCK:
return 0
raise
def setblocking(self, flag):
if flag:
self.timeout = None
else:
self.timeout = 0.0
def settimeout(self, howlong):
if howlong is not None:
try:
f = howlong.__float__
except AttributeError:
raise TypeError('a float is required')
howlong = f()
if howlong < 0.0:
raise ValueError('Timeout value out of range')
self.__dict__['timeout'] = howlong # avoid recursion with any property on self.timeout
def gettimeout(self):
return self.__dict__['timeout'] # avoid recursion with any property on self.timeout
def shutdown(self, how):
if how == 0: # SHUT_RD
self.hub.cancel_wait(self._read_event, cancel_wait_ex)
elif how == 1: # SHUT_WR
self.hub.cancel_wait(self._write_event, cancel_wait_ex)
else:
self.hub.cancel_wait(self._read_event, cancel_wait_ex)
self.hub.cancel_wait(self._write_event, cancel_wait_ex)
self._sock.shutdown(how)
family = property(lambda self: self._sock.family)
type = property(lambda self: self._sock.type)
proto = property(lambda self: self._sock.proto)
def fileno(self):
return self._sock.fileno()
def getsockname(self):
return self._sock.getsockname()
def getpeername(self):
return self._sock.getpeername()
# delegate the functions that we haven't implemented to the real socket object
_s = "def %s(self, *args): return self._sock.%s(*args)\n\n"
_m = None
for _m in set(_socketmethods) - set(locals()):
exec(_s % (_m, _m,))
del _m, _s
if PYPY:
def _reuse(self):
self._sock._reuse()
def _drop(self):
self._sock._drop()
SocketType = socket
if hasattr(_socket, 'socketpair'):
def socketpair(family=getattr(_socket, 'AF_UNIX', _socket.AF_INET),
type=_socket.SOCK_STREAM, proto=0):
one, two = _socket.socketpair(family, type, proto)
result = socket(_sock=one), socket(_sock=two)
if PYPY:
one._drop()
two._drop()
return result
elif 'socketpair' in __implements__:
__implements__.remove('socketpair')
if hasattr(_socket, 'fromfd'):
def fromfd(fd, family, type, proto=0):
s = _socket.fromfd(fd, family, type, proto)
result = socket(_sock=s)
if PYPY:
s._drop()
return result
elif 'fromfd' in __implements__:
__implements__.remove('fromfd')
if hasattr(__socket__, 'ssl'):
def ssl(sock, keyfile=None, certfile=None):
# deprecated in 2.7.9 but still present;
# sometimes backported by distros. See ssl.py
# Note that we import gevent.ssl, not _ssl2, to get the correct
# version.
from gevent import ssl as _sslmod
# wrap_socket is 2.7.9/backport, sslwrap_simple is older. They take
# the same arguments.
wrap = getattr(_sslmod, 'wrap_socket', None) or getattr(_sslmod, 'sslwrap_simple')
return wrap(sock, keyfile, certfile)
__implements__.append('ssl')
__all__ = __implements__ + __extensions__ + __imports__
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