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mapping. It's also the base class for CGIHandler, which just uses
sys.stdin, os.environ, and so on.
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'multiprocess' (defaulting to 'True' and 'False' respectively) to control
the configuration sent to the application. It sets 'origin_server' to
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CGIHandler().run(app)
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uses 'wsgi.run_once' of 'True', 'wsgi.multithread' of 'False', and
'wsgi.multiprocess' of 'True'. It does not take any initialization
parameters, but always uses 'sys.stdin', 'os.environ', and friends.
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instead.
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