ampy.py can not detect the socket closed when amp server is down.

[spikeekips]

Hi, developers.

`ampy.py` does not check the socket is closed by the server-side like server is shutdown. When the server is shutdown, `sock.recv` in ampy.py still try to receive, but the data is 0 bytes. I attached my patch.

Thanks.

[Eric P. Mangold (teratorn)]

Hi spikeekips,

Thank you for your patch! I intent to work on revamping Ampy in the near future to use asyncio instead of asyncore since asyncore is such a piece of junk by comparison. Possibly using a bundled version of https://pypi.python.org/pypi/trollius - the point of ampy is to be a chunk of python code you can grab and quickly have a pure-python + stdlib amp client and server.

Outside of those requirements you should just use Twisted implementation.