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'connection':1, 'keep-alive':1, 'proxy-authenticate':1,
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'proxy-authorization':1, 'te':1, 'trailers':1, 'transfer-encoding':1,
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def is_hop_by_hop(header_name):
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"""Return true if 'header_name' is an HTTP/1.1 "Hop-by-Hop" header"""
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class ServerHandler(object):
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"""Manage the invocation of a WSGI application"""