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                使用 UDP 數據包發送短的文本消息實現是很簡單的并且提供可一個非常輕量級的消息傳遞通道。但是這種模式有很大的缺陷,就是不保證的數據的可靠性,有可能會存在丟包的情況,甚至嚴重的情況就是服務器不可用的時候,會完全丟失你的消息。不過這個任務會在有些情況下十分有作用: 你不關心消息是否丟失; 你不想要終止程序只是因為消息無法傳遞; ~~~ server.py import socket port = 8081 s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.bind(("", port)) print "waiting on port:", port while 1: data, addr = s.recvfrom(1024) print data --- client.py import socket port = 8081 host = "localhost" s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.bind(("", 0)) s.sendto("Holy Guido! It's working.", (host, port)) ~~~ 還有一個提醒事項,不要用上面的程序發送大量的數據包,尤其是在 Windows 上。要是想要發送大的消息的話,你可以這樣做: ~~~ BUFSIZE = 1024 while msg: s.sendto(msg[:BUFSIZE], (host, port)) msg = msg[BUFSIZE:] ~~~
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