我正在使用 Twisted 教程中的以下脚本(稍作修改):
from twisted.application import internet, service
from twisted.internet import reactor, protocol, defer
from twisted.protocols import basic
from twisted.web import client
class FingerProtocol(basic.LineReceiver):
def lineReceived(self, user):
d = self.factory.getUser(user)
def onError(err):
return "Internal server error"
d.addErrback(onError)
def writeResponse(message):
self.transport.write(message + "\r\n")
self.transport.loseConnection()
d.addCallback(writeResponse)
class FingerFactory(protocol.ServerFactory):
protocol = FingerProtocol
def __init__(self, prefix):
self.prefix = prefix
def getUser(self, user):
return client.getPage(self.prefix + user)
application = service.Application('finger', uid=1, gid=1)
factory = FingerFactory(prefix="http://livejournal.com/~")
internet.TCPServer(7979, factory).setServiceParent(
service.IServiceCollection(application))
我保存finger_daemon.tac
并运行
twistd -y finger_daemon.tac \
-l /home/me/twisted/finger.log \
--pidfile=/home/me/twisted/finger.pid
但当然它不会绑定到 79,因为它是一个特权端口。我也尝试使用 sudo 运行,没有区别。
然后我尝试将TCPServer
端口更改为 7979,然后在运行时连接到守护程序
telnet 127.0.0.1 7979
我得到Connection Refused
错误。这里具体是怎么回事?守护进程应该如何在 Twisted 中工作?