问题描述

from twisted.internet import ssl, protocol, defer, task, endpoints
from twisted.protocols.basic import LineReceiver
from twisted.python.modules import getModule
from OpenSSL.crypto import load_privatekey, load_certificate, FILETYPE_PEM
from custom_esmtp import mySMTP

def main(reactor):
    caCertFile = open("/opt/tesa/etc/certs/CA/cacert.pem","r")
    certFile = open("/opt/tesa/etc/certs/server/server.crt","r")
    keyFile = open("/opt/tesa/etc/certs/server/server.key","r")
    caCertData = caCertFile.read()
    pKeyData = keyFile.read()
    certData = certFile.read()
    caCert = ssl.Certificate.loadPEM(caCertData)
    cert = load_certificate(FILETYPE_PEM, certData)
    pKey = load_privatekey(FILETYPE_PEM, pKeyData)
    sslCtxFactory = ssl.CertificateOptions(privateKey=pKey, certificate=cert, trustRoot=caCert)
    myESMTP = mySMTP(contextFactory=sslCtxFactory)
    factory = protocol.Factory.forProtocol(lambda: mySMTP(contextFactory=sslCtxFactory))
    endpoint = endpoints.TCP4ServerEndpoint(reactor, 8001)
    endpoint.listen(factory)
    return defer.Deferred()

if __name__ == '__main__':
    import starttls_server
    task.react(starttls_server.main)

但是，在Twisted的mail.py中，SMTP类定义有一个方法"validateFrom"：

def validateFrom(self, helo, origin):
    <<snip>>
    if self.portal:

        result = self.portal.login(
            cred.credentials.Anonymous(),
            None,
            IMessageDeliveryFactory, IMessageDelivery)

        def ebAuthentication(err):
            """
            Translate cred exceptions into SMTP exceptions so that the
            protocol code which invokes C{validateFrom} can properly report
            the failure.
            """
            if err.check(cred.error.UnauthorizedLogin):
                print ("Unauth Login")
                exc = SMTPBadSender(origin)
            elif err.check(cred.error.UnhandledCredentials):
                exc = SMTPBadSender(
                    origin, resp="Unauthenticated senders not allowed")
            else:
                return err
            return defer.fail(exc)

        result.addCallbacks(
            self._cbAnonymousAuthentication, ebAuthentication)

        def continueValidation(ignored):
            """
            Re-attempt from address validation.
            """
            return self.validateFrom(helo, origin)

        result.addCallback(continueValidation)
        return result

    raise SMTPBadSender(origin)

因此，如果定义了self.port，则该方法在退出if条件之前返回-但如果未定义，它将引发SMTPBadSender错误。并且在SMTP类定义中没有定义该门户。

我注意到self.portal是否在init方法中为SMTPFactory类定义了--我们是否应该以某种方式使用它--如果是这样的话，有人能解释一下这将如何影响我们的服务器代码吗？也就是说，即使这样似乎也没有将self.port设置为任何"有意义的"内容...

definit(自身，门户=无)： Self.portal=门户

mail from: me@localhost
250 Sender address accepted
rcpt to:you@somedomain.test
503 Must have sender before recipient

一如既往的感谢！

ESMTP

所以我找到了一个似乎很简单的答案--只需在我们的定制推荐答案类中为ValiateFrom和ValiateTo创建重载定义！效果很好..。但我不是百分之百相信这是最"正确"的解决方案--我现在可以提交我的EHLO、邮件发件人和RCPT到……但当我尝试提交"数据"时：

2014-10-15 09:49:40+0000 [mySMTP,0,127.0.0.1] Unhandled Error
        Traceback (most recent call last):
          File "/usr/lib64/python2.6/site-packages/twisted/internet/tcp.py", line 220, in _dataReceived
            rval = self.protocol.dataReceived(data)
          File "/usr/lib64/python2.6/site-packages/twisted/protocols/basic.py", line 454, in dataReceived
            self.lineReceived(line)
          File "/usr/lib64/python2.6/site-packages/twisted/mail/smtp.py", line 568, in lineReceived
            return getattr(self, 'state_' + self.mode)(line)
          File "/usr/lib64/python2.6/site-packages/twisted/mail/smtp.py", line 582, in state_COMMAND
            method('')
        --- <exception caught here> ---
          File "/usr/lib64/python2.6/site-packages/twisted/mail/smtp.py", line 733, in do_DATA
            msg = msgFunc()
        exceptions.AttributeError: User instance has no __call__ method

我仍然在想，我是否应该以某种方式使用SMTPFactory...我知道在这里，边回答边提问不是一种好的做法，所以我只会把它留为"如果有人有更好的建议，请一定要说！"

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