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| Current Path : /var/lib/python-support/python2.7/gevent/ |
| Current File : //var/lib/python-support/python2.7/gevent/socket.py |
# Copyright (c) 2005-2006, Bob Ippolito
# Copyright (c) 2007, Linden Research, Inc.
# Copyright (c) 2009-2010 Denis Bilenko
#
# 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.
"""
# standard functions and classes that this module re-implements in a gevent-aware way:
__implements__ = ['create_connection',
'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',
# Windows:
'errorTab']
import sys
import time
import random
import re
is_windows = sys.platform == 'win32'
if is_windows:
# no such thing as WSAEPERM or error code 10001 according to winsock.h or MSDN
from errno import WSAEINVAL as EINVAL
from errno import WSAEWOULDBLOCK as EWOULDBLOCK
from errno import WSAEINPROGRESS as EINPROGRESS
from errno import WSAEALREADY as EALREADY
from errno import WSAEISCONN as EISCONN
from gevent.win32util import formatError as strerror
EAGAIN = EWOULDBLOCK
else:
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
_realsocket = _socket.socket
__socket__ = __import__('socket')
_fileobject = __socket__._fileobject
for name in __imports__[:]:
try:
value = getattr(__socket__, name)
globals()[name] = value
except AttributeError:
__imports__.remove(name)
for name in __socket__.__all__:
value = getattr(__socket__, name)
if isinstance(value, (int, long, basestring)):
globals()[name] = value
__imports__.append(name)
del name, value
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')
# XXX: implement blocking functions that are not yet implemented
from gevent.hub import getcurrent, get_hub
from gevent import core
from gevent import spawn
from gevent.util import wrap_errors
_ip4_re = re.compile('^[\d\.]+$')
def _wait_helper(ev, evtype):
current, timeout_exc = ev.arg
if evtype & core.EV_TIMEOUT:
current.throw(timeout_exc)
else:
current.switch(ev)
def wait_read(fileno, timeout=None, timeout_exc=timeout('timed out'), event=None):
"""Block the current greenlet until *fileno* is ready to read.
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 event is None:
event = core.read_event(fileno, _wait_helper, timeout, (getcurrent(), timeout_exc))
else:
assert event.callback == _wait_helper, event.callback
assert event.arg is None, 'This event is already used by another greenlet: %r' % (event.arg, )
event.arg = (getcurrent(), timeout_exc)
event.add(timeout)
try:
switch_result = get_hub().switch()
assert event is switch_result, 'Invalid switch into wait_read(): %r' % (switch_result, )
finally:
event.cancel()
event.arg = None
def wait_write(fileno, timeout=None, timeout_exc=timeout('timed out'), event=None):
"""Block the current greenlet until *fileno* is ready to write.
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 event is None:
event = core.write_event(fileno, _wait_helper, timeout, (getcurrent(), timeout_exc))
else:
assert event.callback == _wait_helper, event.callback
assert event.arg is None, 'This event is already used by another greenlet: %r' % (event.arg, )
event.arg = (getcurrent(), timeout_exc)
event.add(timeout)
try:
switch_result = get_hub().switch()
assert event is switch_result, 'Invalid switch into wait_write(): %r' % (switch_result, )
finally:
event.arg = None
event.cancel()
def wait_readwrite(fileno, timeout=None, timeout_exc=timeout('timed out'), event=None):
"""Block the current greenlet until *fileno* is ready to read or write.
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 event is None:
event = core.readwrite_event(fileno, _wait_helper, timeout, (getcurrent(), timeout_exc))
else:
assert event.callback == _wait_helper, event.callback
assert event.arg is None, 'This event is already used by another greenlet: %r' % (event.arg, )
event.arg = (getcurrent(), timeout_exc)
event.add(timeout)
try:
switch_result = get_hub().switch()
assert event is switch_result, 'Invalid switch into wait_readwrite(): %r' % (switch_result, )
finally:
event.arg = None
event.cancel()
def __cancel_wait(event):
if event.pending:
arg = event.arg
if arg is not None:
arg[0].throw(error(EBADF, 'File descriptor was closed in another greenlet'))
def cancel_wait(event):
core.active_event(__cancel_wait, event)
if sys.version_info[:2] <= (2, 4):
# implement close argument to _fileobject that we require
realfileobject = _fileobject
class _fileobject(realfileobject):
__slots__ = realfileobject.__slots__ + ['_close']
def __init__(self, *args, **kwargs):
self._close = kwargs.pop('close', False)
realfileobject.__init__(self, *args, **kwargs)
def close(self):
try:
if self._sock:
self.flush()
finally:
if self._close:
self._sock.close()
self._sock = None
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()
class socket(object):
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._read_event = core.event(core.EV_READ, self.fileno(), _wait_helper)
self._write_event = core.event(core.EV_WRITE, self.fileno(), _wait_helper)
# regarding the following, see issue #31
# (http://code.google.com/p/gevent/issues/detail?id=31#c19)
if is_windows:
self._rw_event = core.event(core.EV_READ | core.EV_WRITE, self.fileno(), _wait_helper)
else:
self._rw_event = core.event(core.EV_WRITE, self.fileno(), _wait_helper)
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, 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 accept(self):
sock = self._sock
while True:
try:
client_socket, address = sock.accept()
break
except error, ex:
if ex[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
wait_read(sock.fileno(), timeout=self.timeout, event=self._read_event)
return socket(_sock=client_socket), address
def close(self):
cancel_wait(self._rw_event)
cancel_wait(self._read_event)
cancel_wait(self._write_event)
self._sock = _closedsocket()
dummy = self._sock._dummy
for method in _delegate_methods:
setattr(self, method, dummy)
def connect(self, address):
if isinstance(address, tuple) and len(address) == 2:
address = gethostbyname(address[0]), address[1]
if self.timeout == 0.0:
return self._sock.connect(address)
sock = self._sock
if self.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_readwrite(sock.fileno(), event=self._rw_event)
else:
raise error(result, strerror(result))
else:
end = time.time() + self.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_readwrite(sock.fileno(), timeout=timeleft, event=self._rw_event)
else:
raise error(result, strerror(result))
def connect_ex(self, address):
try:
return self.connect(address) or 0
except timeout:
return EAGAIN
except error, ex:
if type(ex) is error:
return ex[0]
else:
raise # gaierror is not silented 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):
# note that this does not inherit timeout either (intentionally, because that's
# how the standard socket behaves)
return _fileobject(self.dup(), mode, bufsize)
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, ex:
if ex[0] == EBADF:
return ''
if ex[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
# QQQ without clearing exc_info test__refcount.test_clean_exit fails
sys.exc_clear()
try:
wait_read(sock.fileno(), timeout=self.timeout, event=self._read_event)
except error, ex:
if ex[0] == EBADF:
return ''
raise
def recvfrom(self, *args):
sock = self._sock
while True:
try:
return sock.recvfrom(*args)
except error, ex:
if ex[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
wait_read(sock.fileno(), timeout=self.timeout, event=self._read_event)
def recvfrom_into(self, *args):
sock = self._sock
while True:
try:
return sock.recvfrom_into(*args)
except error, ex:
if ex[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
wait_read(sock.fileno(), timeout=self.timeout, event=self._read_event)
def recv_into(self, *args):
sock = self._sock
while True:
try:
return sock.recv_into(*args)
except error, ex:
if ex[0] == EBADF:
return 0
if ex[0] != EWOULDBLOCK or self.timeout == 0.0:
raise
sys.exc_clear()
try:
wait_read(sock.fileno(), timeout=self.timeout, event=self._read_event)
except error, ex:
if ex[0] == EBADF:
return 0
raise
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, ex:
if ex[0] != EWOULDBLOCK or timeout == 0.0:
raise
sys.exc_clear()
try:
wait_write(sock.fileno(), timeout=timeout, event=self._write_event)
except error, ex:
if ex[0] == EBADF:
return 0
raise
try:
return sock.send(data, flags)
except error, ex2:
if ex2[0] == EWOULDBLOCK:
return 0
raise
def sendall(self, 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 self._sock methods directly
if self.timeout is None:
data_sent = 0
while data_sent < len(data):
data_sent += self.send(_get_memory(data, data_sent), flags)
else:
timeleft = self.timeout
end = time.time() + timeleft
data_sent = 0
while True:
data_sent += self.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 sendto(self, *args):
sock = self._sock
try:
return sock.sendto(*args)
except error, ex:
if ex[0] != EWOULDBLOCK or timeout == 0.0:
raise
sys.exc_clear()
wait_write(sock.fileno(), timeout=self.timeout, event=self._write_event)
try:
return sock.sendto(*args)
except error, ex2:
if ex2[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.timeout = howlong
def gettimeout(self):
return self.timeout
def shutdown(self, how):
cancel_wait(self._rw_event)
if how == 0: # SHUT_RD
cancel_wait(self._read_event)
elif how == 1: # SHUT_RW
cancel_wait(self._write_event)
else:
cancel_wait(self._read_event)
cancel_wait(self._write_event)
self._sock.shutdown(how)
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 set(__socket__._socketmethods) - set(locals()):
exec _s % (_m, _m, _m, _m)
del _m, _s
SocketType = socket
if hasattr(_socket, 'socketpair'):
def socketpair(*args):
one, two = _socket.socketpair(*args)
return socket(_sock=one), socket(_sock=two)
else:
__implements__.remove('socketpair')
if hasattr(_socket, 'fromfd'):
def fromfd(*args):
return socket(_sock=_socket.fromfd(*args))
else:
__implements__.remove('fromfd')
def bind_and_listen(descriptor, address=('', 0), backlog=50, reuse_addr=True):
if reuse_addr:
try:
descriptor.setsockopt(SOL_SOCKET, SO_REUSEADDR, descriptor.getsockopt(SOL_SOCKET, SO_REUSEADDR) | 1)
except error:
pass
descriptor.bind(address)
descriptor.listen(backlog)
def tcp_listener(address, backlog=50, reuse_addr=True):
"""A shortcut to create a TCP socket, bind it and put it into listening state."""
sock = socket()
bind_and_listen(sock, address, backlog=backlog, reuse_addr=reuse_addr)
return sock
try:
_GLOBAL_DEFAULT_TIMEOUT = __socket__._GLOBAL_DEFAULT_TIMEOUT
except AttributeError:
_GLOBAL_DEFAULT_TIMEOUT = object()
def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None):
"""Connect to *address* and return the socket object.
Convenience function. Connect to *address* (a 2-tuple ``(host,
port)``) and return the socket object. Passing the optional
*timeout* parameter will set the timeout on the socket instance
before attempting to connect. If no *timeout* is supplied, the
global default timeout setting returned by :func:`getdefaulttimeout`
is used. If *source_address* is set it must be a tuple of (host, port)
for the socket to bind as a source address before making the connection.
An host of '' or port 0 tells the OS to use the default.
"""
host, port = address
err = None
for res in getaddrinfo(host, port, 0, SOCK_STREAM):
af, socktype, proto, _canonname, sa = res
sock = None
try:
sock = socket(af, socktype, proto)
if timeout is not _GLOBAL_DEFAULT_TIMEOUT:
sock.settimeout(timeout)
if source_address:
sock.bind(source_address)
sock.connect(sa)
return sock
except error, ex:
err = ex
sys.exc_clear()
if sock is not None:
sock.close()
if err is not None:
raise err
else:
raise error("getaddrinfo returns an empty list")
try:
from gevent.dns import resolve_ipv4, resolve_ipv6
except Exception:
import traceback
traceback.print_exc()
__implements__.remove('gethostbyname')
__implements__.remove('getaddrinfo')
else:
def gethostbyname(hostname):
""":func:`socket.gethostbyname` implemented using :mod:`gevent.dns`.
Differs in the following ways:
* raises :class:`DNSError` (a subclass of :class:`socket.gaierror`) with dns error
codes instead of standard socket error codes
* does not support ``/etc/hosts`` but calls the original :func:`socket.gethostbyname`
if *hostname* has no dots
* does not iterate through all addresses, instead picks a random one each time
"""
# TODO: this is supposed to iterate through all the addresses
# could use a global dict(hostname, iter)
# - fix these nasty hacks for localhost, ips, etc.
if not isinstance(hostname, str) or '.' not in hostname:
return _socket.gethostbyname(hostname)
if _ip4_re.match(hostname):
return hostname
if hostname == _socket.gethostname():
return _socket.gethostbyname(hostname)
addrs = None
try:
_ttl, addrs = resolve_ipv4(hostname)
except:
_ttl, addrs = resolve_ipv6(hostname)
return inet_ntop(AF_INET6, random.choice(addrs))
else:
return inet_ntop(AF_INET, random.choice(addrs))
def getaddrinfo(host, port, family=0, socktype=0, proto=0, flags=0, evdns_flags=0):
"""*Some* approximation of :func:`socket.getaddrinfo` implemented using :mod:`gevent.dns`.
If *host* is not a string, does not has any dots or is a numeric IP address, then
the standard :func:`socket.getaddrinfo` is called.
Otherwise, calls :func:`resolve_ipv4` (for ``AF_INET``) or :func:`resolve_ipv6` (for ``AF_INET6``) or
both (for ``AF_UNSPEC``) and formats the result the way :func:`socket.getaddrinfo` does it.
Differs in the following ways:
* raises :class:`DNSError` (a subclass of :class:`gaierror`) with libevent-dns error
codes instead of standard socket error codes
* *flags* argument is ignored
* for IPv6, flow info and scope id are always 0
Additionally, supports *evdns_flags* keyword arguments (default ``0``) that is passed
to :mod:`dns` functions.
"""
if isinstance(host, unicode):
host = host.encode('idna')
if not isinstance(host, str) or \
'.' not in host or \
_ip4_re.match(host) is not None or \
family not in (AF_UNSPEC, AF_INET, AF_INET6):
return _socket.getaddrinfo(host, port, family, socktype, proto, flags)
if isinstance(port, basestring):
try:
if socktype == 0:
try:
port = getservbyname(port, 'tcp')
socktype = SOCK_STREAM
except socket.error:
port = getservbyname(port, 'udp')
socktype = SOCK_DGRAM
elif socktype == SOCK_STREAM:
port = getservbyname(port, 'tcp')
elif socktype == SOCK_DGRAM:
port = getservbyname(port, 'udp')
else:
raise gaierror(EAI_SERVICE, 'Servname not supported for ai_socktype')
except error, ex:
if 'not found' in str(ex):
raise gaierror(EAI_SERVICE, 'Servname not supported for ai_socktype')
else:
raise gaierror(str(ex))
socktype_proto = [(SOCK_STREAM, 6), (SOCK_DGRAM, 17), (SOCK_RAW, 0)]
if socktype:
socktype_proto = [(x, y) for (x, y) in socktype_proto if socktype == x]
if proto:
socktype_proto = [(x, y) for (x, y) in socktype_proto if proto == y]
result = []
if family == AF_INET:
for res in resolve_ipv4(host, evdns_flags)[1]:
sockaddr = (inet_ntop(family, res), port)
for socktype, proto in socktype_proto:
result.append((family, socktype, proto, '', sockaddr))
elif family == AF_INET6:
for res in resolve_ipv6(host, evdns_flags)[1]:
sockaddr = (inet_ntop(family, res), port, 0, 0)
for socktype, proto in socktype_proto:
result.append((family, socktype, proto, '', sockaddr))
else:
ipv4_res = None
ipv6_res = None
try:
ipv4_res = resolve_ipv4(host, evdns_flags)[1]
except:
pass
if not ipv4_res:
ipv4_res = None
ipv6_res= resolve_ipv6(host, evdns_flags)[1]
if ipv4_res is not None:
for res in ipv4_res:
sockaddr = (inet_ntop(AF_INET, res), port)
for socktype, proto in socktype_proto:
result.append((AF_INET, socktype, proto, '', sockaddr))
if ipv6_res is not None:
for res in ipv6_res:
sockaddr = (inet_ntop(AF_INET6, res), port, 0, 0)
for socktype, proto in socktype_proto:
result.append((AF_INET6, socktype, proto, '', sockaddr))
return result
# TODO libevent2 has getaddrinfo that is probably better than the hack above; should wrap that.
_have_ssl = False
try:
from gevent.ssl import sslwrap_simple as ssl, SSLError as sslerror, SSLSocket as SSLType
_have_ssl = True
except ImportError:
try:
from gevent.sslold import ssl, sslerror, SSLObject as SSLType
_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__
Cokiee Shell Web 1.0, Coded By Razor
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