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654 lines (556 loc) · 20.5 KB
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# Copyright (c) 2005-2006, Bob Ippolito
# Copyright (c) 2007, Linden Research, Inc.
# Copyright (c) 2009-2010 Denis Bilenko
# Copyright (c) 2010 Yutaka Matsubara
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
"""Cooperative socket module.
This module provides socket operations and some related functions.
The API of the functions and classes matches the API of the corresponding
items in standard :mod:`socket` module exactly, but the synchronous functions
in this module only block the current greenlet and let the others run.
For convenience, exceptions (like :class:`error <socket.error>` and :class:`timeout <socket.timeout>`)
as well as the constants from :mod:`socket` module are imported into this module.
"""
import sys
def is_py3():
return sys.hexversion >= 0x03000000
def is_py34():
return sys.hexversion >= 0x03040000
__implements__ = ['getaddrinfo',
'gethostbyname',
'socket',
'SocketType',
'fromfd',
'socketpair']
# non-standard functions that this module provides:
__extensions__ = ['wait_read',
'wait_write',
'wait_readwrite']
# standard functions and classes that this module re-imports
__imports__ = ['error',
'gaierror',
'getfqdn',
'herror',
'htonl',
'htons',
'ntohl',
'ntohs',
'inet_aton',
'inet_ntoa',
'inet_pton',
'inet_ntop',
'timeout',
'gethostname',
'getprotobyname',
'getservbyname',
'getservbyport',
'getdefaulttimeout',
'setdefaulttimeout',
# Python 2.5 and older:
'RAND_add',
'RAND_egd',
'RAND_status',
]
patched = True
import sys
import time
import random
import re
import platform
from errno import EINVAL
from errno import EWOULDBLOCK
from errno import EINPROGRESS
from errno import EALREADY
from errno import EAGAIN
from errno import EISCONN
from os import strerror
try:
from errno import EBADF
except ImportError:
EBADF = 9
import _socket
error = _socket.error
timeout = _socket.timeout
__socket__ = __import__('socket')
if is_py3():
_realsocket = _socket.socket
else:
_realsocket = _socket.socket
_fileobject = __socket__._fileobject
gaierror = _socket.gaierror
gethostbyname = _socket.gethostbyname
getaddrinfo = _socket.getaddrinfo
for name in __imports__[:]:
try:
value = getattr(__socket__, name)
globals()[name] = value
except AttributeError:
__imports__.remove(name)
if is_py3():
for name in __socket__.__all__:
value = getattr(__socket__, name)
if isinstance(value, (int, str)):
globals()[name] = value
__imports__.append(name)
else:
for name in __socket__.__all__:
value = getattr(__socket__, name)
if isinstance(value, (int, long, basestring)):
globals()[name] = value
__imports__.append(name)
del name, value
SOCKETMETHODS = ('bind', 'fileno', 'listen', 'getpeername', 'getsockname', 'getsockopt', 'setsockopt')
if 'inet_ntop' not in globals():
# inet_ntop is required by our implementation of getaddrinfo
def inet_ntop(address_family, packed_ip):
if address_family == AF_INET:
return inet_ntoa(packed_ip)
# XXX: ipv6 won't work on windows
raise NotImplementedError('inet_ntop() is not available on this platform')
from meinheld import server, cancel_wait
def wait_read(fileno, timeout=None):
if not timeout:
timeout = 0
server.trampoline(fileno, read=True, timeout=int(timeout))
def wait_write(fileno, timeout=None):
if not timeout:
timeout = 0
server.trampoline(fileno, write=True, timeout=int(timeout))
def wait_readwrite(fileno, timeout=None):
if not timeout:
timeout = 0
server.trampoline(fileno, read=True, write=True, timeout=int(timeout))
if sys.version_info[:2] < (2, 7):
_get_memory = buffer
else:
def _get_memory(string, offset):
return memoryview(string)[offset:]
class _closedsocket(object):
__slots__ = []
def _dummy(*args):
raise error(EBADF, 'Bad file descriptor')
# All _delegate_methods must also be initialized here.
send = recv = recv_into = sendto = recvfrom = recvfrom_into = _dummy
__getattr__ = _dummy
_delegate_methods = ("recv", "recvfrom", "recv_into", "recvfrom_into", "send", "sendto", 'sendall')
timeout_default = object()
use_kqueue = platform.system() in ("Darwin", "FreeBSD")
def internal_accept(s):
sock = s._sock
while True:
try:
client_socket, address = sock.accept()
break
except error as ex:
if ex.errno != EWOULDBLOCK or s.timeout == 0.0:
raise
#sys.exc_clear()
wait_read(sock.fileno(), timeout=self.timeout)
return socket(_sock=client_socket), address
def internal_close(s):
cancel_wait(s._sock.fileno())
s._sock = _closedsocket()
dummy = s._sock._dummy
for method in _delegate_methods:
setattr(s, method, dummy)
def internal_connect(s, address):
if s.timeout == 0.0:
return s._sock.connect(address)
# When poll for connect() with kqueue, poll for EVFILT_WRITE.
wait = wait_write if use_kqueue else wait_readwrite
sock = s._sock
if s.timeout is None:
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):
wait(sock.fileno())
else:
raise error(result, strerror(result))
else:
end = time.time() + s.timeout
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):
timeleft = end - time.time()
if timeleft <= 0:
raise timeout('timed out')
wait(sock.fileno(), timeout=timeleft)
else:
raise error(result, strerror(result))
def internal_connect_ex(s, address):
try:
return s.connect(address) or 0
except timeout:
return EAGAIN
except error as ex:
if type(ex) is error:
return ex.errno
else:
raise # gaierror is not silented by connect_ex
def internal_recv(s, *args):
# print("internal_recv")
sock = s._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.errno == EBADF:
raise
if ex.errno != EWOULDBLOCK or s.timeout == 0.0:
raise
# QQQ without clearing exc_info test__refcount.test_clean_exit fails
#sys.exc_clear()
try:
wait_read(sock.fileno(), timeout=s.timeout)
except error as ex:
if ex.errno == EBADF:
return ''
raise
def internal_recvfrom(s, *args):
# print("internal_recvfrom")
sock = s._sock
while True:
try:
return sock.recvfrom(*args)
except error as ex:
if ex.errno != EWOULDBLOCK or s.timeout == 0.0:
raise
#sys.exc_clear()
wait_read(sock.fileno(), timeout=s.timeout)
def internal_recvfrom_into(s, *args):
# print("internal_recvfrom_into")
sock = s._sock
while True:
try:
return sock.recvfrom_into(*args)
except error as ex:
if ex.errno != EWOULDBLOCK or s.timeout == 0.0:
raise
#sys.exc_clear()
wait_read(sock.fileno(), timeout=s.timeout)
def internal_recv_into(s, *args):
# print("internal_recv_into")
sock = s._sock
while True:
try:
return sock.recv_into(*args)
except error as ex:
if ex.errno == EBADF:
8000
return 0
if ex.errno != EWOULDBLOCK or s.timeout == 0.0:
raise
#sys.exc_clear()
try:
wait_read(sock.fileno(), timeout=s.timeout)
except error as ex:
if ex.errno == EBADF:
return 0
raise
def internal_send(s, data, flags=0, timeout=timeout_default):
sock = s._sock
if timeout is timeout_default:
timeout = s.timeout
try:
return sock.send(data, flags)
except error as ex:
if ex.errno != EWOULDBLOCK or timeout == 0.0:
raise
#sys.exc_clear()
try:
wait_write(sock.fileno(), timeout=timeout)
except error as ex:
if ex.errno == EBADF:
return 0
raise
try:
return sock.send(data, flags)
except error as ex2:
if ex2.errno == EWOULDBLOCK:
return 0
raise
if is_py3():
def internal_sendall(s, data, flags=0):
# this sendall is also reused by SSL subclasses (both from ssl and sslold modules),
# so it should not call s._sock methods directly
if s.timeout is None:
data_sent = 0
while data_sent < len(data):
data_sent += s.send(_get_memory(data, data_sent), flags)
else:
timeleft = s.timeout
end = time.time() + timeleft
data_sent = 0
while True:
data_sent += s.send(_get_memory(data, data_sent), flags, timeout=timeleft)
if data_sent >= len(data):
break
timeleft = end - time.time()
if timeleft <= 0:
raise timeout('timed out')
else:
def internal_sendall(s, data, flags=0):
if isinstance(data, unicode):
data = data.encode()
# this sendall is also reused by SSL subclasses (both from ssl and sslold modules),
# so it should not call s._sock methods directly
if s.timeout is None:
data_sent = 0
while data_sent < len(data):
data_sent += s.send(_get_memory(data, data_sent), flags)
else:
timeleft = s.timeout
end = time.time() + timeleft
data_sent = 0
while True:
data_sent += s.send(_get_memory(data, data_sent), flags, timeout=timeleft)
if data_sent >= len(data):
break
timeleft = end - time.time()
if timeleft <= 0:
raise timeout('timed out')
def internal_sendto(s, *args):
sock = s._sock
try:
return sock.sendto(*args)
except error as ex:
if ex.errno != EWOULDBLOCK or timeout == 0.0:
raise
#sys.exc_clear()
wait_write(sock.fileno(), timeout=s.timeout)
try:
return sock.sendto(*args)
except error as ex2:
if ex2.errno == EWOULDBLOCK:
return 0
raise
def internal_settimeout(s, 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')
s.timeout = howlong
def internal_gettimeout(s):
return s.timeout
def internal_shutdown(s, how):
cancel_wait(s._sock.fileno())
s._sock.shutdown(how)
if is_py3():
class socket(object):
patched = True
#__slots__ = ["__weakref__", "_io_refs", "_closed", "_sock", "timeout"]
def __init__(self, family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None):
self._sock = _socket.socket(family, type, proto, fileno)
self._io_refs = 0
self._closed = False
self._sock.setblocking(0)
self.setsockopt(IPPROTO_TCP, TCP_NODELAY, 1)
self.timeout = _socket.getdefaulttimeout()
def __enter__(self):
return self
def __exit__(self, *args):
if not self._closed:
self.close()
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."""
fd = dup(self.fileno())
sock = self.__class__(self.family, self.type, self.proto, fileno=fd)
sock.settimeout(self.gettimeout())
return sock
def _decref_socketios(self):
if self._io_refs > 0:
self._io_refs -= 1
if self._closed:
self.close()
def _real_close(self, _ss=_socket.socket):
# This function should not reference any globals. See issue #808164.
_ss.close(self._sock)
def close(self):
# This function should not reference any globals. See issue #808164.
self._closed = True
if self._io_refs <= 0:
self._real_close()
def detach(self):
"""detach() -> file descriptor
Close the socket object without closing the underlying file descriptor.
The object cannot be used after this call, but the file descriptor
can be reused for other purposes. The file descriptor is returned.
"""
self._closed = True
return self._sock.detach()
def accept(self):
raise NotImplementedError()
makefile = __socket__.socket.makefile
connect = internal_connect
connect_ex = internal_connect_ex
recv = internal_recv
recvfrom = internal_recvfrom
recvfrom_into = internal_recvfrom_into
recv_into = internal_recv_into
send = internal_send
sendall = internal_sendall
sendto = internal_sendto
settimeout = internal_settimeout
gettimeout = internal_gettimeout
shutdown = internal_shutdown
family = property(lambda self: self._sock.family, doc="the socket family")
type = property(lambda self: self._sock.type, doc="the socket type")
proto = property(lambda self: self._sock.proto, doc="the socket protocol")
_s = ("def %s(self, *args): return self._sock.%s(*args)\n\n"
"%s.__doc__ = _realsocket.%s.__doc__\n")
for _m in SOCKETMETHODS:
exec(_s % (_m, _m, _m, _m))
del _m, _s
else:
class socket(object):
patched = True
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()
self._sock.setblocking(0)
self.setsockopt(IPPROTO_TCP, TCP_NODELAY, 1)
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):
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 self.timeout is not None:
result += ' timeout=' + str(self.timeout)
return result
def __enter__(self):
return self
def __exit__(self, *args):
if not self._closed:
self.close()
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):
# note that this does not inherit timeout either (intentionally, because that's
# how the standard socket behaves)
return _fileobject(self.dup(), mode, bufsize)
def accept(self):
raise NotImplementedError()
close = internal_close
connect = internal_connect
connect_ex = internal_connect_ex
recv = internal_recv
recvfrom = internal_recvfrom
recvfrom_into = internal_recvfrom_into
recv_into = internal_recv_into
send = internal_send
sendall = internal_sendall
sendto = internal_sendto
settimeout = internal_settimeout
gettimeout = internal_gettimeout
shutdown = internal_shutdown
family = property(lambda self: self._sock.family, doc="the socket family")
type = property(lambda self: self._sock.type, doc="the socket type")
proto = property(lambda self: self._sock.proto, doc="the socket protocol")
# 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"
"%s.__doc__ = _realsocket.%s.__doc__\n")
for _m in SOCKETMETHODS:
exec(_s % (_m, _m, _m, _m))
del _m, _s
if is_py34():
SocketType = __socket__.SocketType
else:
SocketType = socket
if hasattr(_socket, 'socketpair'):
def socketpair(*args):
one, two = _socket.socketpair(*args)
return socket(_sock=one), socket(_sock=two)
else:
__all__.remove('socketpair')
if is_py3():
pass
else:
if hasattr(_socket, 'fromfd'):
def fromfd(*args):
return socket(_sock=_socket.fromfd(*args))
else:
__all__.remove('fromfd')
try:
_GLOBAL_DEFAULT_TIMEOUT = __socket__._GLOBAL_DEFAULT_TIMEOUT
except AttributeError:
_GLOBAL_DEFAULT_TIMEOUT = object()
_have_ssl = False
# if is_py3():
# pass
# else:
# try:
# from meinheld.ssl import sslwrap_simple as ssl, SSLError as sslerror
# _have_ssl = True
# except ImportError:
# try:
# from meinheld.sslold import ssl, sslerror
# _have_ssl = True
# except ImportError:
# pass
# if sys.version_info[:2] <= (2, 5) and _have_ssl:
# __implements__.extend(['ssl', 'sslerror', 'SSLType'])
__all__ = __implements__ + __extensions__ + __imports__