52b09becac
Fixes installation issue when older dnspython is present in system packages https://github.com/eventlet/eventlet/pull/341
70 lines
2.0 KiB
Python
70 lines
2.0 KiB
Python
import os
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import sys
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import warnings
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__import__('eventlet.green._socket_nodns')
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__socket = sys.modules['eventlet.green._socket_nodns']
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__all__ = __socket.__all__
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__patched__ = __socket.__patched__ + [
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'create_connection',
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'getaddrinfo',
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'gethostbyname',
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'gethostbyname_ex',
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'getnameinfo',
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]
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from eventlet.patcher import slurp_properties
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slurp_properties(__socket, globals(), srckeys=dir(__socket))
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if os.environ.get("EVENTLET_NO_GREENDNS", '').lower() == "yes":
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warnings.warn(
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'EVENTLET_NO_GREENDNS is noop, dnspython is bundled and DNS resolution is always green',
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DeprecationWarning,
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stacklevel=2,
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)
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from eventlet.support import greendns
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gethostbyname = greendns.gethostbyname
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getaddrinfo = greendns.getaddrinfo
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gethostbyname_ex = greendns.gethostbyname_ex
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getnameinfo = greendns.getnameinfo
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def create_connection(address,
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timeout=_GLOBAL_DEFAULT_TIMEOUT,
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source_address=None):
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"""Connect to *address* and return the socket object.
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Convenience function. Connect to *address* (a 2-tuple ``(host,
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port)``) and return the socket object. Passing the optional
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*timeout* parameter will set the timeout on the socket instance
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before attempting to connect. If no *timeout* is supplied, the
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global default timeout setting returned by :func:`getdefaulttimeout`
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is used.
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"""
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err = "getaddrinfo returns an empty list"
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host, port = address
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for res in getaddrinfo(host, port, 0, SOCK_STREAM):
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af, socktype, proto, canonname, sa = res
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sock = None
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try:
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sock = socket(af, socktype, proto)
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if timeout is not _GLOBAL_DEFAULT_TIMEOUT:
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sock.settimeout(timeout)
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if source_address:
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sock.bind(source_address)
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sock.connect(sa)
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return sock
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except error as e:
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err = e
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if sock is not None:
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sock.close()
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if not isinstance(err, error):
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err = error(err)
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raise err
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