view tests/dummysmtpd.py @ 43952:14d282b57e24

help: clarify that the Windows registry key for hgrc files is systemwide

Since there's no version or path info here to distinguish between installations,
it is effectively systemwide (unless splitting hairs about the WoW64 registry
redirection).

Differential Revision: https://phab.mercurial-scm.org/D7693

#!/usr/bin/env python

"""dummy SMTP server for use in tests"""

from __future__ import absolute_import

import asyncore
import optparse
import smtpd
import ssl
import sys
import traceback

from mercurial import (
    pycompat,
    server,
    sslutil,
    ui as uimod,
)


def log(msg):
    sys.stdout.write(msg)
    sys.stdout.flush()


class dummysmtpserver(smtpd.SMTPServer):
    def __init__(self, localaddr):
        smtpd.SMTPServer.__init__(self, localaddr, remoteaddr=None)

    def process_message(self, peer, mailfrom, rcpttos, data, **kwargs):
        log('%s from=%s to=%s\n' % (peer[0], mailfrom, ', '.join(rcpttos)))

    def handle_error(self):
        # On Windows, a bad SSL connection sometimes generates a WSAECONNRESET.
        # The default handler will shutdown this server, and then both the
        # current connection and subsequent ones fail on the client side with
        # "No connection could be made because the target machine actively
        # refused it".  If we eat the error, then the client properly aborts in
        # the expected way, and the server is available for subsequent requests.
        traceback.print_exc()


class dummysmtpsecureserver(dummysmtpserver):
    def __init__(self, localaddr, certfile):
        dummysmtpserver.__init__(self, localaddr)
        self._certfile = certfile

    def handle_accept(self):
        pair = self.accept()
        if not pair:
            return
        conn, addr = pair
        ui = uimod.ui.load()
        try:
            # wrap_socket() would block, but we don't care
            conn = sslutil.wrapserversocket(conn, ui, certfile=self._certfile)
        except ssl.SSLError:
            log('%s ssl error\n' % addr[0])
            conn.close()
            return
        smtpd.SMTPChannel(self, conn, addr)


def run():
    try:
        asyncore.loop()
    except KeyboardInterrupt:
        pass


def _encodestrsonly(v):
    if isinstance(v, type(u'')):
        return v.encode('ascii')
    return v


def bytesvars(obj):
    unidict = vars(obj)
    bd = {k.encode('ascii'): _encodestrsonly(v) for k, v in unidict.items()}
    if bd[b'daemon_postexec'] is not None:
        bd[b'daemon_postexec'] = [
            _encodestrsonly(v) for v in bd[b'daemon_postexec']
        ]
    return bd


def main():
    op = optparse.OptionParser()
    op.add_option('-d', '--daemon', action='store_true')
    op.add_option('--daemon-postexec', action='append')
    op.add_option('-p', '--port', type=int, default=8025)
    op.add_option('-a', '--address', default='localhost')
    op.add_option('--pid-file', metavar='FILE')
    op.add_option('--tls', choices=['none', 'smtps'], default='none')
    op.add_option('--certificate', metavar='FILE')

    opts, args = op.parse_args()
    if opts.tls == 'smtps' and not opts.certificate:
        op.error('--certificate must be specified')

    addr = (opts.address, opts.port)

    def init():
        if opts.tls == 'none':
            dummysmtpserver(addr)
        else:
            dummysmtpsecureserver(addr, opts.certificate)
        log('listening at %s:%d\n' % addr)

    server.runservice(
        bytesvars(opts),
        initfn=init,
        runfn=run,
        runargs=[pycompat.sysexecutable, pycompat.fsencode(__file__)]
        + pycompat.sysargv[1:],
    )


if __name__ == '__main__':
    main()