Python Twisted 客户端连接丢失

Question

我有这个扭曲的客户端，它连接到一个有索引的扭曲服务器。我从命令行运行这个客户端。它运作良好。现在我将其修改为循环运行(参见 main())以便我可以继续查询。但是客户端只运行一次。下次它只是说 connection lost\n Connection lost - goodbye!。

我做错了什么？在循环中我正在重新连接到服务器，这是错误的吗？

from twisted.internet import reactor
from twisted.internet import protocol

from settings import AS_SERVER_HOST, AS_SERVER_PORT

# a client protocol
class Spell_client(protocol.Protocol):
    """Once connected, send a message, then print the result."""

    def connectionMade(self):
        self.transport.write(self.factory.query)

    def dataReceived(self, data):
        "As soon as any data is received, write it back."
        if data == '!':
            self.factory.results = ''
        else:
            self.factory.results = data
        self.transport.loseConnection()

    def connectionLost(self, reason):
        print "\tconnection lost"

class Spell_Factory(protocol.ClientFactory):
    protocol = Spell_client

    def __init__(self, query):
        self.query   = query
        self.results = ''

    def clientConnectionFailed(self, connector, reason):
        print "\tConnection failed - goodbye!"
        reactor.stop()

    def clientConnectionLost(self, connector, reason):
        print "\tConnection lost - goodbye!"
        reactor.stop()

# this connects the protocol to a server runing on port 8090
def main(): 
    print 'Connecting to %s:%d' % (AS_SERVER_HOST, AS_SERVER_PORT)
    while True:
        print
        query = raw_input("Query:")
        if query == '': return
        f = Spell_Factory(query) 
        reactor.connectTCP(AS_SERVER_HOST, AS_SERVER_PORT, f)
        reactor.run()
        print f.results
    return

if __name__ == '__main__':
    main()

Answer 1

您不太了解 Twisted react 器的工作原理。

reactor.run() 正在启动 react 器的事件循环 --- 这是一个“永远”循环的阻塞调用。

参见 http://twistedmatrix.com/documents/10.2.0/core/howto/reactor-basics.html用于各种与 react 器相关的主题。