所以,我想扩展Python smtpd SMTPServer类,以便它可以处理SMTP AUTH连接。看似简单......
所以,看起来我可以这样开始:
def smtp_EHLO(self, arg):
print 'got in arg: ', arg
# do stuff here...
但出于某种原因,永远不会被召唤。 Python smtpd库调用其他类似的方法:
method = None
i = line.find(' ')
if i < 0:
command = line.upper()
arg = None
else:
command = line[:i].upper()
arg = line[i+1:].strip()
method = getattr(self, 'smtp_' + command, None)
为什么不调用我的方法?
之后,我认为我可能只是覆盖整个found_terminator(self):方法,但这似乎也不起作用。
def found_terminator(self):
# I add this to my child class and it never gets called...
我做了些蠢事还是......?也许我今天还没有完全醒来......
import smtpd
import asyncore
class CustomSMTPServer(smtpd.SMTPServer):
def smtp_EHLO(self, arg):
print 'got in arg: ', arg
def process_message(self, peer, mailfrom, rcpttos, data):
print 'Receiving message from:', peer
print 'Message addressed from:', mailfrom
print 'Message addressed to :', rcpttos
print 'Message length :', len(data)
print 'HERE WE ARE MAN!'
return
# Implementation of base class abstract method
def found_terminator(self):
print 'THIS GOT CALLED RIGHT HERE!'
line = EMPTYSTRING.join(self.__line)
print >> DEBUGSTREAM, 'Data:', repr(line)
self.__line = []
if self.__state == self.COMMAND:
if not line:
self.push('500 Error: bad syntax')
return
method = None
i = line.find(' ')
if i < 0:
command = line.upper()
arg = None
else:
command = line[:i].upper()
arg = line[i+1:].strip()
method = getattr(self, 'smtp_' + command, None)
print 'looking for: ', command
print 'method is: ', method
if not method:
self.push('502 Error: command "%s" not implemented' % command)
return
method(arg)
return
else:
if self.__state != self.DATA:
self.push('451 Internal confusion')
return
# Remove extraneous carriage returns and de-transparency according
# to RFC 821, Section 4.5.2.
data = []
for text in line.split('\r\n'):
if text and text[0] == '.':
data.append(text[1:])
else:
data.append(text)
self.__data = NEWLINE.join(data)
status = self.__server.process_message(self.__peer,
self.__mailfrom,
self.__rcpttos,
self.__data)
self.__rcpttos = []
self.__mailfrom = None
self.__state = self.COMMAND
self.set_terminator('\r\n')
if not status:
self.push('250 Ok')
else:
self.push(status)
server = CustomSMTPServer(('127.0.0.1', 1025), None)
asyncore.loop()
答案 0 :(得分:3)
你需要扩展SMTPChannel
- 这就是实现smtp_
动词方法的地方;你SMTPServer
的扩展只需要返回你自己的频道子类。
答案 1 :(得分:0)
TL&DR:要将其他功能添加到SMTPChannel,您只需要声明一个功能,然后将其直接添加到smtpd.SMTPChannel
说明:
SMTPChannel类旨在响应用户在开放端口(通常是端口25)上输入的命令。它搜索“可以回答哪些命令”的方式基于“自省”,它会检查功能的所有可用属性。
请注意,SMTPChannel中的功能需要以“ smtp_”开头。例如,如果要响应帮助,则可以创建smtpd.SMTPChannel.smtp_HELP。
下面的函数来自详细说明内省的源代码
class SMTPChannel(asynchat.async_chat):
method = getattr(self, 'smtp_' + command, None)
CodeThatWorks
第1步:声明一个称为
的功能def smtp_HELP(self,arg):
self.push("[8675309] GPT Answers to HELP")
第2步:将以下功能添加到smtpd.SMTPChannel
class FakeSMTPServer(smtpd.SMTPServer):
"""A Fake smtp server"""
smtpd.SMTPChannel.smtp_HELP = smtp_HELP
第3步:Telnet到localhost 25并进行测试
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 vics-imac.fios-router.home ESMTP Sendmail 6.7.4 Sunday 17 March 2019
HELP
[8675309] GPT Answers to HELP