def tick(self):
        try:
            s, addr = self.socket.accept()
            prevent_socket_inheritance(s)
            if not self.ready:
                return
            if hasattr(s, 'settimeout'):
                s.settimeout(self.timeout)
            
            environ = self.environ.copy()
            # SERVER_SOFTWARE is common for IIS. It's also helpful for
            # us to pass a default value for the "Server" response header.
            if environ.get("SERVER_SOFTWARE") is None:
                environ["SERVER_SOFTWARE"] = "%s WSGI Server" % self.version
            # set a non-standard environ entry so the WSGI app can know what
            # the *real* server protocol is (and what features to support).
            # See http://www.faqs.org/rfcs/rfc2145.html.
            environ["ACTUAL_SERVER_PROTOCOL"] = self.protocol
            environ["SERVER_NAME"] = self.server_name
            
            if isinstance(self.bind_addr, basestring):
                # AF_UNIX. This isn't really allowed by WSGI, which doesn't
                # address unix domain sockets. But it's better than nothing.
                environ["SERVER_PORT"] = ""
            else:
                environ["SERVER_PORT"] = str(self.bind_addr[1])
                # optional values
                # Until we do DNS lookups, omit REMOTE_HOST
                environ["REMOTE_ADDR"] = addr[0]
                environ["REMOTE_PORT"] = str(addr[1])
            
            conn = self.ConnectionClass(s, self.wsgi_app, environ)
            self.requests.put(conn)
        except socket.timeout:
            # The only reason for the timeout in start() is so we can
            # notice keyboard interrupts on Win32, which don't interrupt
            # accept() by default
            return
        except socket.error, x:
            if x.args[0] in socket_error_eintr:
                # I *think* this is right. EINTR should occur when a signal
                # is received during the accept() call; all docs say retry
                # the call, and I *think* I'm reading it right that Python
                # will then go ahead and poll for and handle the signal
                # elsewhere. See http://www.cherrypy.org/ticket/707.
                return
            if x.args[0] in socket_errors_nonblocking:
                # Just try again. See http://www.cherrypy.org/ticket/479.
                return
            if x.args[0] in socket_errors_to_ignore:
                # Our socket was closed.
                # See http://www.cherrypy.org/ticket/686.
                return
            raise
Creates a Matcher instance for an application configuration file.
dataset/ETHPy150Open cloudera/hue/desktop/core/src/desktop/lib/wsgiserver.py/CherryPyWSGIServer.tick--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/dev_appserver.py/LoadAppConfig