1cfdd41f7d
Given the order of imports and monkey-patching, even when using greendns the `getaddrinfo()` call inside of _socket_nodns.create_connection would use the unpatched (i.e. non-green) version of getaddrinfo, inadvertantly blocking the process in some situations
99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
import os
|
|
import sys
|
|
from eventlet.hubs import get_hub
|
|
__import__('eventlet.green._socket_nodns')
|
|
__socket = sys.modules['eventlet.green._socket_nodns']
|
|
globals().update(dict([(var, getattr(__socket, var))
|
|
for var in dir(__socket)
|
|
if not var.startswith('__')]))
|
|
|
|
__all__ = __socket.__all__
|
|
__patched__ = __socket.__patched__ + ['gethostbyname', 'getaddrinfo', 'create_connection',]
|
|
|
|
|
|
greendns = None
|
|
if os.environ.get("EVENTLET_NO_GREENDNS",'').lower() != "yes":
|
|
try:
|
|
from eventlet.support import greendns
|
|
except ImportError, ex:
|
|
pass
|
|
|
|
__original_gethostbyname__ = __socket.gethostbyname
|
|
# the thread primitives on Darwin have some bugs that make
|
|
# it undesirable to use tpool for hostname lookups
|
|
_can_use_tpool = (
|
|
os.environ.get("EVENTLET_TPOOL_DNS",'').lower() == "yes"
|
|
and not sys.platform.startswith('darwin'))
|
|
def _gethostbyname_twisted(name):
|
|
from twisted.internet import reactor
|
|
from eventlet.twistedutil import block_on as _block_on
|
|
return _block_on(reactor.resolve(name))
|
|
|
|
def _gethostbyname_tpool(name):
|
|
from eventlet import tpool
|
|
return tpool.execute(
|
|
__original_gethostbyname__, name)
|
|
|
|
if getattr(get_hub(), 'uses_twisted_reactor', None):
|
|
gethostbyname = _gethostbyname_twisted
|
|
elif greendns:
|
|
gethostbyname = greendns.gethostbyname
|
|
elif _can_use_tpool:
|
|
gethostbyname = _gethostbyname_tpool
|
|
else:
|
|
gethostbyname = __original_gethostbyname__
|
|
|
|
|
|
__original_getaddrinfo__ = __socket.getaddrinfo
|
|
def _getaddrinfo_tpool(*args, **kw):
|
|
from eventlet import tpool
|
|
return tpool.execute(
|
|
__original_getaddrinfo__, *args, **kw)
|
|
|
|
if greendns:
|
|
getaddrinfo = greendns.getaddrinfo
|
|
elif _can_use_tpool:
|
|
getaddrinfo = _getaddrinfo_tpool
|
|
else:
|
|
getaddrinfo = __original_getaddrinfo__
|
|
|
|
if greendns:
|
|
gethostbyname_ex = greendns.gethostbyname_ex
|
|
getnameinfo = greendns.getnameinfo
|
|
__patched__ = __patched__ + ['gethostbyname_ex', 'getnameinfo']
|
|
|
|
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.
|
|
"""
|
|
|
|
msg = "getaddrinfo returns an empty list"
|
|
host, port = address
|
|
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, msg:
|
|
if sock is not None:
|
|
sock.close()
|
|
|
|
raise error, msg
|
|
|
|
|