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7
by Jean-Paul Calderone
Basics of Deferreds |
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from twisted.internet import reactor |
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from twisted.internet.protocol import ClientFactory |
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from twisted.protocols.basic import LineOnlyReceiver |
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def printDateAndExit(date): |
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print 'Server time is', date.strip() |
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reactor.stop() |
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def main(): |
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factory = ClientFactory() |
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factory.protocol = lambda: DateReader(printDateAndExit) |
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reactor.connectTCP('google.com', 80, factory) |
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reactor.run() |
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class DateReader(LineOnlyReceiver): |
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def __init__(self, dateHeaderReceived): |
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self.dateHeaderReceived = dateHeaderReceived |
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def connectionMade(self): |
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self.transport.write('HEAD / HTTP/1.0\r\n\r\n') |
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def lineReceived(self, line): |
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if line.lower().startswith('date:'): |
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ignored, date = line.split(':', 1) |
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self.dateHeaderReceived(date) |
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self.transport.loseConnection() |
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main() |
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