This is the superclass of all Server objects in the module. BaseServer ( server_address, RequestHandlerClass ) ¶ Particularly important for stream services where each client can potentially beĬonnected for a long time (if threads or subprocesses cannot be used). Request to work on next (or whether to handle a new incoming request). Partially finished requests and to use selectors to decide which That supports neither threads nor fork() (or where these are tooĮxpensive or inappropriate for the service) is to maintain an explicit table of The request handler class handle() method.Īnother approach to handling multiple simultaneous requests in an environment ThisĬan be implemented by using a synchronous server and doing an explicit fork in In some cases, it may be appropriate to process part of a request synchronously,īut to finish processing in a forked child depending on the request data. Here a threading or forking server is appropriate. Which may be for a very long time if a client is slow to receive all the data it
On the other hand, if you are building an HTTP server where all data is storedĮxternally (for instance, in the file system), a synchronous class willĮssentially render the service “deaf” while one request is being handled – Have to use locks to protect the integrity of the shared data. In this case, you can use a threading server, but you will probably Would never reach the initial state kept in the parent process and passed toĮach child. Modified by different requests, since the modifications in the child process Use a forking server if the service contains state in memory that can be Of course, you still have to use your head! For instance, it makes no sense to StreamRequestHandler or DatagramRequestHandler. This can be hidden by using the handler subclasses The request handler class must be different for datagram or stream The service by combining one of the server classes with your request handlerĬlass. To implement a service, you must derive a class from BaseRequestHandler These classes are pre-defined using the mix-in classes. _close() now waits until allĬhild processes and non-daemonic threads complete.Īdd a new _on_close classĪttribute to opt-in for the pre-3.7 behaviour. Server classes have the same external methods and attributes, no matter whatĬhanged in version 3.7: _close() and Python will not exit until all threads created by ThreadingMixIn have Threads to behave autonomously the default is False, meaning that You should set the flag explicitly if you would like The ThreadingMixIn class defines an attributeĭaemon_threads, which indicates whether or not the server should wait for You should explicitly declare how you want your threads to behave on an abrupt When inheriting from ThreadingMixIn for threaded connection behavior, To close the socket (unless you used a with statement). Serve_forever() method of the server object to The server’s address and the request handler class. Second, you must instantiate one of the server classes, passing it Handler class by subclassing the BaseRequestHandler class and Solution is to create a separate process or thread to handle each request theįorkingMixIn and ThreadingMixIn mix-in classes can be used toĬreating a server requires several steps. Or because it returns a lot of data which the client is slow to process.
Request takes a long time to complete, because it requires a lot of computation, These four classes process requests synchronously each request must beĬompleted before the next request can be started. UDP classes, but use Unix domain sockets they’re not available on These more infrequently used classes are similar to the TCP and UnixDatagramServer ( server_address, RequestHandlerClass, bind_and_activate=True ) ¶ UnixStreamServer ( server_address, RequestHandlerClass, bind_and_activate=True ) ¶ class socketserver. This uses datagrams, which are discrete packets of information that mayĪrrive out of order or be lost while in transit. UDPServer ( server_address, RequestHandlerClass, bind_and_activate=True ) ¶ If bind_and_activate is true, the constructor automatically attempts to This uses the Internet TCP protocol, which provides forĬontinuous streams of data between the client and server.
TCPServer ( server_address, RequestHandlerClass, bind_and_activate=True ) ¶ There are four basic concrete server classes: class socketserver. The socketserver module simplifies the task of writing network servers. Socketserver - A framework for network servers ¶
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