46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
from socket import error as SocketError
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try:
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from select import poll, POLLIN
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except ImportError: # `poll` doesn't exist on OSX and other platforms
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poll = False
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try:
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from select import select
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except ImportError: # `select` doesn't exist on AppEngine.
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select = False
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def is_connection_dropped(conn): # Platform-specific
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"""
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Returns True if the connection is dropped and should be closed.
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:param conn:
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:class:`httplib.HTTPConnection` object.
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Note: For platforms like AppEngine, this will always return ``False`` to
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let the platform handle connection recycling transparently for us.
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"""
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sock = getattr(conn, 'sock', False)
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if sock is False: # Platform-specific: AppEngine
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return False
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if sock is None: # Connection already closed (such as by httplib).
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return False
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if not poll:
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if not select: # Platform-specific: AppEngine
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return False
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try:
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return select([sock], [], [], 0.0)[0]
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except SocketError:
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return True
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# This version is better on platforms that support it.
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p = poll()
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p.register(sock, POLLIN)
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for (fno, ev) in p.poll(0.0):
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if fno == sock.fileno():
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# Either data is buffered (bad), or the connection is dropped.
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return True
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