Web Server的进程与协程

最新推荐文章于 2025-04-26 13:38:42 发布

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最新推荐文章于 2025-04-26 13:38:42 发布 · 523 阅读

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#web server

Web Server启动方式有两种：

1 启动新的进程

2 在当前进程中以协程的方式启动

先看下面代码：

class Server(object):
    def start(self, application, port, host='0.0.0.0', workers=0):
        """Run a WSGI server with the given application."""
        self._host = host
        self._port = port
        backlog = CONF.backlog

        self._socket = self._get_socket(self._host,
                                        self._port,
                                        backlog=backlog)

        self._launch(application, workers)
    def _launch(self, application, workers=0):
        service = WorkerService(self, application, self.disable_ssl, workers)
        if workers < 1:
            # The API service should run in the current process.
            self._server = service
            # Dump the initial option values
            cfg.CONF.log_opt_values(LOG, logging.DEBUG)
            service.start()
            systemd.notify_once()
        else:
            # dispose the whole pool before os.fork, otherwise there will
            # be shared DB connections in child processes which may cause
            # DB errors.
            api.context_manager.dispose_pool()
            # The API service runs in a number of child processes.
            # Minimize the