golden hour

/lib64/python2.7

File/Folder	Size	Actions
BaseHTTPServer.py	21.93 KB
BaseHTTPServer.pyc	21.18 KB
BaseHTTPServer.pyo	21.18 KB
Bastion.py	5.61 KB
Bastion.pyc	6.5 KB
Bastion.pyo	6.5 KB
CGIHTTPServer.py	12.84 KB
CGIHTTPServer.pyc	10.84 KB
CGIHTTPServer.pyo	10.84 KB
ConfigParser.py	27.1 KB
ConfigParser.pyc	24.62 KB
ConfigParser.pyo	24.62 KB
Cookie.py	24.66 KB
Cookie.pyc	21.64 KB
Cookie.pyo	21.64 KB
Demo	-
Doc	-
DocXMLRPCServer.py	10.52 KB
DocXMLRPCServer.pyc	9.96 KB
DocXMLRPCServer.pyo	9.85 KB
HTMLParser.py	16.58 KB
HTMLParser.pyc	13.39 KB
HTMLParser.pyo	13.1 KB
MimeWriter.py	6.33 KB
MimeWriter.pyc	7.19 KB
MimeWriter.pyo	7.19 KB
Queue.py	8.36 KB
Queue.pyc	9.19 KB
Queue.pyo	9.19 KB
SimpleHTTPServer.py	7.25 KB
SimpleHTTPServer.pyc	7.55 KB
SimpleHTTPServer.pyo	7.55 KB
SimpleXMLRPCServer.py	25.17 KB
SimpleXMLRPCServer.pyc	22.31 KB
SimpleXMLRPCServer.pyo	22.31 KB
SocketServer.py	23.29 KB
SocketServer.pyc	23.49 KB
SocketServer.pyo	23.49 KB
StringIO.py	10.41 KB
StringIO.pyc	11.21 KB
StringIO.pyo	11.21 KB
Tools	-
UserDict.py	5.67 KB
UserDict.pyc	8.61 KB
UserDict.pyo	8.61 KB
UserList.py	3.56 KB
UserList.pyc	6.42 KB
UserList.pyo	6.42 KB
UserString.py	9.46 KB
UserString.pyc	14.52 KB
UserString.pyo	14.52 KB
_LWPCookieJar.py	6.4 KB
_LWPCookieJar.pyc	5.4 KB
_LWPCookieJar.pyo	5.4 KB
_MozillaCookieJar.py	5.67 KB
_MozillaCookieJar.pyc	4.37 KB
_MozillaCookieJar.pyo	4.33 KB
__future__.py	4.28 KB
__future__.pyc	4.13 KB
__future__.pyo	4.13 KB
__phello__.foo.py	64 B
__phello__.foo.pyc	125 B
__phello__.foo.pyo	125 B
_abcoll.py	17.45 KB
_abcoll.pyc	24.4 KB
_abcoll.pyo	24.4 KB
_osx_support.py	18.03 KB
_osx_support.pyc	11.28 KB
_osx_support.pyo	11.28 KB
_pyio.py	67.24 KB
_pyio.pyc	62.71 KB
_pyio.pyo	62.71 KB
_strptime.py	19.75 KB
_strptime.pyc	14.53 KB
_strptime.pyo	14.53 KB
_sysconfigdata.py	17.56 KB
_sysconfigdata.pyc	20.72 KB
_sysconfigdata.pyo	20.72 KB
_threading_local.py	7.28 KB
_threading_local.pyc	6.45 KB
_threading_local.pyo	6.45 KB
_weakrefset.py	5.48 KB
_weakrefset.pyc	9.25 KB
_weakrefset.pyo	9.25 KB
abc.py	6.98 KB
abc.pyc	6 KB
abc.pyo	5.94 KB
aifc.py	32.94 KB
aifc.pyc	29.31 KB
aifc.pyo	29.31 KB
antigravity.py	60 B
antigravity.pyc	203 B
antigravity.pyo	203 B
anydbm.py	2.6 KB
anydbm.pyc	2.73 KB
anydbm.pyo	2.73 KB
argparse.py	86.46 KB
argparse.pyc	62.57 KB
argparse.pyo	62.41 KB
ast.py	11.53 KB
ast.pyc	12.65 KB
ast.pyo	12.65 KB
asynchat.py	11.13 KB
asynchat.pyc	8.44 KB
asynchat.pyo	8.44 KB
asyncore.py	20.36 KB
asyncore.pyc	18.4 KB
asyncore.pyo	18.4 KB
atexit.py	1.67 KB
atexit.pyc	2.15 KB
atexit.pyo	2.15 KB
audiodev.py	7.42 KB
audiodev.pyc	8.27 KB
audiodev.pyo	8.27 KB
base64.py	11.09 KB
base64.pyc	10.63 KB
base64.pyo	10.63 KB
bdb.py	21.21 KB
bdb.pyc	18.65 KB
bdb.pyo	18.65 KB
binhex.py	14.14 KB
binhex.pyc	15.04 KB
binhex.pyo	15.04 KB
bisect.py	2.53 KB
bisect.pyc	3 KB
bisect.pyo	3 KB
bsddb	-
cProfile.py	6.43 KB
cProfile.pyc	6.25 KB
cProfile.pyo	6.25 KB
calendar.py	22.76 KB
calendar.pyc	27.13 KB
calendar.pyo	27.13 KB
cgi.py	34.31 KB
cgi.pyc	31.99 KB
cgi.pyo	31.99 KB
cgitb.py	11.89 KB
cgitb.pyc	11.9 KB
cgitb.pyo	11.9 KB
chunk.py	5.25 KB
chunk.pyc	5.46 KB
chunk.pyo	5.46 KB
cmd.py	14.67 KB
cmd.pyc	13.71 KB
cmd.pyo	13.71 KB
code.py	9.95 KB
code.pyc	10.09 KB
code.pyo	10.09 KB
codecs.py	34.44 KB
codecs.pyc	35.74 KB
codecs.pyo	35.74 KB
codeop.py	5.86 KB
codeop.pyc	6.44 KB
codeop.pyo	6.44 KB
collections.py	25.28 KB
collections.pyc	23.99 KB
collections.pyo	23.94 KB
colorsys.py	3.6 KB
colorsys.pyc	3.9 KB
colorsys.pyo	3.9 KB
commands.py	2.49 KB
commands.pyc	2.41 KB
commands.pyo	2.41 KB
compileall.py	7.58 KB
compileall.pyc	6.85 KB
compileall.pyo	6.85 KB
compiler	-
config	-
contextlib.py	4.32 KB
contextlib.pyc	4.35 KB
contextlib.pyo	4.35 KB
cookielib.py	63.21 KB
cookielib.pyc	53.55 KB
cookielib.pyo	53.37 KB
copy.py	11.25 KB
copy.pyc	11.91 KB
copy.pyo	11.82 KB
copy_reg.py	6.64 KB
copy_reg.pyc	4.99 KB
copy_reg.pyo	4.95 KB
crypt.py	2.24 KB
crypt.pyc	2.89 KB
crypt.pyo	2.89 KB
csv.py	15.96 KB
csv.pyc	13.14 KB
csv.pyo	13.14 KB
ctypes	-
curses	-
dbhash.py	498 B
dbhash.pyc	718 B
dbhash.pyo	718 B
decimal.py	215.84 KB
decimal.pyc	167.33 KB
decimal.pyo	167.33 KB
difflib.py	80.42 KB
difflib.pyc	60.5 KB
difflib.pyo	60.45 KB
dircache.py	1.1 KB
dircache.pyc	1.54 KB
dircache.pyo	1.54 KB
dis.py	6.35 KB
dis.pyc	6.08 KB
dis.pyo	6.08 KB
distutils	-
doctest.py	102.01 KB
doctest.pyc	81.45 KB
doctest.pyo	81.17 KB
dumbdbm.py	8.61 KB
dumbdbm.pyc	6.41 KB
dumbdbm.pyo	6.41 KB
dummy_thread.py	4.31 KB
dummy_thread.pyc	5.27 KB
dummy_thread.pyo	5.27 KB
dummy_threading.py	2.74 KB
dummy_threading.pyc	1.25 KB
dummy_threading.pyo	1.25 KB
email	-
encodings	-
filecmp.py	9.36 KB
filecmp.pyc	9.4 KB
filecmp.pyo	9.4 KB
fileinput.py	13.81 KB
fileinput.pyc	14.48 KB
fileinput.pyo	14.48 KB
fnmatch.py	3.16 KB
fnmatch.pyc	3.45 KB
fnmatch.pyo	3.45 KB
formatter.py	14.56 KB
formatter.pyc	18.73 KB
formatter.pyo	18.73 KB
fpformat.py	4.59 KB
fpformat.pyc	4.56 KB
fpformat.pyo	4.56 KB
fractions.py	21.87 KB
fractions.pyc	19.27 KB
fractions.pyo	19.27 KB
ftplib.py	36.1 KB
ftplib.pyc	33.38 KB
ftplib.pyo	33.38 KB
functools.py	4.37 KB
functools.pyc	5.95 KB
functools.pyo	5.95 KB
genericpath.py	2.94 KB
genericpath.pyc	3.19 KB
genericpath.pyo	3.19 KB
getopt.py	7.15 KB
getopt.pyc	6.5 KB
getopt.pyo	6.45 KB
getpass.py	5.43 KB
getpass.pyc	4.63 KB
getpass.pyo	4.63 KB
gettext.py	19.47 KB
gettext.pyc	15.19 KB
gettext.pyo	15.19 KB
glob.py	2.86 KB
glob.pyc	2.83 KB
glob.pyo	2.83 KB
gzip.py	18.26 KB
gzip.pyc	14.72 KB
gzip.pyo	14.72 KB
hashlib.py	7.48 KB
hashlib.pyc	6.74 KB
hashlib.pyo	6.74 KB
heapq.py	17.76 KB
heapq.pyc	14.13 KB
heapq.pyo	14.13 KB
hmac.py	4.48 KB
hmac.pyc	4.44 KB
hmac.pyo	4.44 KB
hotshot	-
htmlentitydefs.py	17.63 KB
htmlentitydefs.pyc	6.22 KB
htmlentitydefs.pyo	6.22 KB
htmllib.py	12.57 KB
htmllib.pyc	19.83 KB
htmllib.pyo	19.83 KB
httplib.py	51.37 KB
httplib.pyc	37.54 KB
httplib.pyo	37.37 KB
idlelib	-
ihooks.py	18.54 KB
ihooks.pyc	20.87 KB
ihooks.pyo	20.87 KB
imaplib.py	47.34 KB
imaplib.pyc	44.45 KB
imaplib.pyo	41.8 KB
imghdr.py	3.46 KB
imghdr.pyc	4.73 KB
imghdr.pyo	4.73 KB
importlib	-
imputil.py	25.16 KB
imputil.pyc	15.26 KB
imputil.pyo	15.08 KB
inspect.py	41.47 KB
inspect.pyc	39.04 KB
inspect.pyo	39.04 KB
io.py	3.12 KB
io.pyc	3.4 KB
io.pyo	3.4 KB
json	-
keyword.py	1.95 KB
keyword.pyc	2.06 KB
keyword.pyo	2.06 KB
lib-dynload	-
lib-tk	-
lib2to3	-
linecache.py	3.87 KB
linecache.pyc	3.14 KB
linecache.pyo	3.14 KB
locale.py	87.33 KB
locale.pyc	48.77 KB
locale.pyo	48.77 KB
logging	-
macpath.py	6.11 KB
macpath.pyc	7.47 KB
macpath.pyo	7.47 KB
macurl2path.py	3.2 KB
macurl2path.pyc	2.71 KB
macurl2path.pyo	2.71 KB
mailbox.py	78.86 KB
mailbox.pyc	74.87 KB
mailbox.pyo	74.82 KB
mailcap.py	8.2 KB
mailcap.pyc	7.77 KB
mailcap.pyo	7.77 KB
markupbase.py	14.3 KB
markupbase.pyc	9.08 KB
markupbase.pyo	8.89 KB
md5.py	358 B
md5.pyc	378 B
md5.pyo	378 B
mhlib.py	32.65 KB
mhlib.pyc	33.01 KB
mhlib.pyo	33.01 KB
mimetools.py	7 KB
mimetools.pyc	8.03 KB
mimetools.pyo	8.03 KB
mimetypes.py	20.22 KB
mimetypes.pyc	17.86 KB
mimetypes.pyo	17.86 KB
mimify.py	14.67 KB
mimify.pyc	11.71 KB
mimify.pyo	11.71 KB
modulefinder.py	23.71 KB
modulefinder.pyc	18.27 KB
modulefinder.pyo	18.19 KB
multifile.py	4.71 KB
multifile.pyc	5.29 KB
multifile.pyo	5.25 KB
multiprocessing	-
mutex.py	1.83 KB
mutex.pyc	2.46 KB
mutex.pyo	2.46 KB
netrc.py	4.47 KB
netrc.pyc	3.83 KB
netrc.pyo	3.83 KB
new.py	610 B
new.pyc	862 B
new.pyo	862 B
nntplib.py	20.97 KB
nntplib.pyc	20.55 KB
nntplib.pyo	20.55 KB
ntpath.py	18.02 KB
ntpath.pyc	11.6 KB
ntpath.pyo	11.56 KB
nturl2path.py	2.32 KB
nturl2path.pyc	1.77 KB
nturl2path.pyo	1.77 KB
numbers.py	10.08 KB
numbers.pyc	13.68 KB
numbers.pyo	13.68 KB
opcode.py	5.35 KB
opcode.pyc	6 KB
opcode.pyo	6 KB
optparse.py	59.69 KB
optparse.pyc	52.78 KB
optparse.pyo	52.7 KB
os.py	25.17 KB
os.pyc	24.96 KB
os.pyo	24.96 KB
os2emxpath.py	4.5 KB
os2emxpath.pyc	4.39 KB
os2emxpath.pyo	4.39 KB
pdb.doc	7.73 KB
pdb.py	44.94 KB
pdb.pyc	42.59 KB
pdb.pyo	42.59 KB
pickle.py	44.09 KB
pickle.pyc	37.56 KB
pickle.pyo	37.37 KB
pickletools.py	72.79 KB
pickletools.pyc	55.77 KB
pickletools.pyo	54.95 KB
pipes.py	9.36 KB
pipes.pyc	9.09 KB
pipes.pyo	9.09 KB
pkgutil.py	19.87 KB
pkgutil.pyc	18.49 KB
pkgutil.pyo	18.49 KB
plat-linux2	-
platform.py	51.98 KB
platform.pyc	36.06 KB
platform.pyo	36.06 KB
plistlib.py	15.44 KB
plistlib.pyc	19.52 KB
plistlib.pyo	19.44 KB
popen2.py	8.22 KB
popen2.pyc	8.81 KB
popen2.pyo	8.77 KB
poplib.py	12.64 KB
poplib.pyc	13.16 KB
poplib.pyo	13.16 KB
posixfile.py	7.82 KB
posixfile.pyc	7.47 KB
posixfile.pyo	7.47 KB
posixpath.py	13.27 KB
posixpath.pyc	11.03 KB
posixpath.pyo	11.03 KB
pprint.py	11.73 KB
pprint.pyc	10.06 KB
pprint.pyo	9.89 KB
profile.py	22.25 KB
profile.pyc	16.07 KB
profile.pyo	15.83 KB
pstats.py	26.08 KB
pstats.pyc	24.43 KB
pstats.pyo	24.43 KB
pty.py	4.94 KB
pty.pyc	4.85 KB
pty.pyo	4.85 KB
py_compile.py	5.79 KB
py_compile.pyc	6.27 KB
py_compile.pyo	6.27 KB
pyclbr.py	13.07 KB
pyclbr.pyc	9.42 KB
pyclbr.pyo	9.42 KB
pydoc.py	91.12 KB
pydoc.pyc	88.35 KB
pydoc.pyo	88.29 KB
pydoc_data	-
quopri.py	6.81 KB
quopri.pyc	6.42 KB
quopri.pyo	6.42 KB
random.py	31.45 KB
random.pyc	24.99 KB
random.pyo	24.99 KB
re.py	12.66 KB
re.pyc	12.79 KB
re.pyo	12.79 KB
repr.py	4.2 KB
repr.pyc	5.26 KB
repr.pyo	5.26 KB
rexec.py	19.68 KB
rexec.pyc	23.58 KB
rexec.pyo	23.58 KB
rfc822.py	32.51 KB
rfc822.pyc	31.05 KB
rfc822.pyo	31.05 KB
rlcompleter.py	5.68 KB
rlcompleter.pyc	5.84 KB
rlcompleter.pyo	5.84 KB
robotparser.py	7.03 KB
robotparser.pyc	7.7 KB
robotparser.pyo	7.7 KB
runpy.py	10.45 KB
runpy.pyc	8.21 KB
runpy.pyo	8.21 KB
sched.py	4.97 KB
sched.pyc	4.88 KB
sched.pyo	4.88 KB
sets.py	18.6 KB
sets.pyc	16.5 KB
sets.pyo	16.5 KB
sgmllib.py	17.46 KB
sgmllib.pyc	15.07 KB
sgmllib.pyo	15.07 KB
sha.py	393 B
sha.pyc	421 B
sha.pyo	421 B
shelve.py	7.89 KB
shelve.pyc	10.03 KB
shelve.pyo	10.03 KB
shlex.py	10.88 KB
shlex.pyc	7.37 KB
shlex.pyo	7.37 KB
shutil.py	18.46 KB
shutil.pyc	18.1 KB
shutil.pyo	18.1 KB
site-packages	-
site.py	19.61 KB
site.pyc	19.11 KB
site.pyo	19.11 KB
smtpd.py	18.11 KB
smtpd.pyc	15.52 KB
smtpd.pyo	15.52 KB
smtplib.py	30.9 KB
smtplib.pyc	29.29 KB
smtplib.pyo	29.29 KB
sndhdr.py	5.83 KB
sndhdr.pyc	7.18 KB
sndhdr.pyo	7.18 KB
socket.py	20.03 KB
socket.pyc	15.73 KB
socket.pyo	15.64 KB
sqlite3	-
sre.py	384 B
sre.pyc	519 B
sre.pyo	519 B
sre_compile.py	15.99 KB
sre_compile.pyc	10.76 KB
sre_compile.pyo	10.65 KB
sre_constants.py	6.95 KB
sre_constants.pyc	5.97 KB
sre_constants.pyo	5.97 KB
sre_parse.py	26.84 KB
sre_parse.pyc	18.98 KB
sre_parse.pyo	18.98 KB
ssl.py	38.7 KB
ssl.pyc	32.05 KB
ssl.pyo	32.05 KB
stat.py	1.8 KB
stat.pyc	2.69 KB
stat.pyo	2.69 KB
statvfs.py	898 B
statvfs.pyc	620 B
statvfs.pyo	620 B
string.py	20.27 KB
string.pyc	19.54 KB
string.pyo	19.54 KB
stringold.py	12.16 KB
stringold.pyc	12.25 KB
stringold.pyo	12.25 KB
stringprep.py	13.21 KB
stringprep.pyc	14.15 KB
stringprep.pyo	14.08 KB
struct.py	82 B
struct.pyc	239 B
struct.pyo	239 B
subprocess.py	57.68 KB
subprocess.pyc	40.93 KB
subprocess.pyo	40.93 KB
sunau.py	16.15 KB
sunau.pyc	17.53 KB
sunau.pyo	17.53 KB
sunaudio.py	1.37 KB
sunaudio.pyc	1.94 KB
sunaudio.pyo	1.94 KB
symbol.py	2.01 KB
symbol.pyc	2.96 KB
symbol.pyo	2.96 KB
symtable.py	7.34 KB
symtable.pyc	11.59 KB
symtable.pyo	11.46 KB
sysconfig.py	21.88 KB
sysconfig.pyc	17.23 KB
sysconfig.pyo	17.23 KB
tabnanny.py	11.07 KB
tabnanny.pyc	8.05 KB
tabnanny.pyo	8.05 KB
tarfile.py	88.12 KB
tarfile.pyc	73.84 KB
tarfile.pyo	73.84 KB
telnetlib.py	26.18 KB
telnetlib.pyc	22.53 KB
telnetlib.pyo	22.53 KB
tempfile.py	17.91 KB
tempfile.pyc	19.35 KB
tempfile.pyo	19.35 KB
test	-
textwrap.py	16.64 KB
textwrap.pyc	11.62 KB
textwrap.pyo	11.53 KB
this.py	1002 B
this.pyc	1.19 KB
this.pyo	1.19 KB
threading.py	46.28 KB
threading.pyc	41.7 KB
threading.pyo	39.58 KB
timeit.py	11.82 KB
timeit.pyc	11.5 KB
timeit.pyo	11.5 KB
toaiff.py	3.07 KB
toaiff.pyc	3.03 KB
toaiff.pyo	3.03 KB
token.py	2.88 KB
token.pyc	3.73 KB
token.pyo	3.73 KB
tokenize.py	16.15 KB
tokenize.pyc	13.61 KB
tokenize.pyo	13.52 KB
trace.py	29.19 KB
trace.pyc	22.26 KB
trace.pyo	22.2 KB
traceback.py	10.99 KB
traceback.pyc	11.35 KB
traceback.pyo	11.35 KB
tty.py	879 B
tty.pyc	1.29 KB
tty.pyo	1.29 KB
types.py	1.99 KB
types.pyc	2.45 KB
types.pyo	2.45 KB
unittest	-
urllib.py	57.14 KB
urllib.pyc	49.1 KB
urllib.pyo	49 KB
urllib2.py	52.13 KB
urllib2.pyc	46.61 KB
urllib2.pyo	46.52 KB
urlparse.py	16.82 KB
urlparse.pyc	15.67 KB
urlparse.pyo	15.67 KB
user.py	1.59 KB
user.pyc	1.68 KB
user.pyo	1.68 KB
uu.py	6.4 KB
uu.pyc	4.21 KB
uu.pyo	4.21 KB
uuid.py	20.6 KB
uuid.pyc	20.68 KB
uuid.pyo	20.68 KB
warnings.py	13.71 KB
warnings.pyc	12.84 KB
warnings.pyo	12.02 KB
wave.py	17.67 KB
wave.pyc	19 KB
wave.pyo	18.94 KB
weakref.py	10.44 KB
weakref.pyc	13.72 KB
weakref.pyo	13.72 KB
webbrowser.py	22.68 KB
webbrowser.pyc	19.83 KB
webbrowser.pyo	19.78 KB
whichdb.py	3.3 KB
whichdb.pyc	2.19 KB
whichdb.pyo	2.19 KB
wsgiref	-
wsgiref.egg-info	187 B
xdrlib.py	5.43 KB
xdrlib.pyc	9.07 KB
xdrlib.pyo	9.07 KB
xml	-
xmllib.py	34.05 KB
xmllib.pyc	26.22 KB
xmllib.pyo	26.22 KB
xmlrpclib.py	50.78 KB
xmlrpclib.pyc	42.89 KB
xmlrpclib.pyo	42.71 KB
zipfile.py	56.45 KB
zipfile.pyc	40.33 KB
zipfile.pyo	40.33 KB

Edit: smtpd.py

#! /usr/bin/env python
"""An RFC 2821 smtp proxy.

Usage: %(program)s [options] [localhost:localport [remotehost:remoteport]]

Options:

--nosetuid
    -n
        This program generally tries to setuid `nobody', unless this flag is
        set.  The setuid call will fail if this program is not run as root (in
        which case, use this flag).

--version
    -V
        Print the version number and exit.

--class classname
    -c classname
        Use `classname' as the concrete SMTP proxy class.  Uses `PureProxy' by
        default.

--debug
    -d
        Turn on debugging prints.

--help
    -h
        Print this message and exit.

Version: %(__version__)s

If localhost is not given then `localhost' is used, and if localport is not
given then 8025 is used.  If remotehost is not given then `localhost' is used,
and if remoteport is not given, then 25 is used.
"""

# Overview:
#
# This file implements the minimal SMTP protocol as defined in RFC 821.  It
# has a hierarchy of classes which implement the backend functionality for the
# smtpd.  A number of classes are provided:
#
#   SMTPServer - the base class for the backend.  Raises NotImplementedError
#   if you try to use it.
#
#   DebuggingServer - simply prints each message it receives on stdout.
#
#   PureProxy - Proxies all messages to a real smtpd which does final
#   delivery.  One known problem with this class is that it doesn't handle
#   SMTP errors from the backend server at all.  This should be fixed
#   (contributions are welcome!).
#
#   MailmanProxy - An experimental hack to work with GNU Mailman
#   <www.list.org>.  Using this server as your real incoming smtpd, your
#   mailhost will automatically recognize and accept mail destined to Mailman
#   lists when those lists are created.  Every message not destined for a list
#   gets forwarded to a real backend smtpd, as with PureProxy.  Again, errors
#   are not handled correctly yet.
#
# Please note that this script requires Python 2.0
#
# Author: Barry Warsaw <barry@python.org>
#
# TODO:
#
# - support mailbox delivery
# - alias files
# - ESMTP
# - handle error codes from the backend smtpd

import sys
import os
import errno
import getopt
import time
import socket
import asyncore
import asynchat

__all__ = ["SMTPServer","DebuggingServer","PureProxy","MailmanProxy"]

program = sys.argv[0]
__version__ = 'Python SMTP proxy version 0.2'

class Devnull:
    def write(self, msg): pass
    def flush(self): pass

DEBUGSTREAM = Devnull()
NEWLINE = '\n'
EMPTYSTRING = ''
COMMASPACE = ', '

def usage(code, msg=''):
    print >> sys.stderr, __doc__ % globals()
    if msg:
        print >> sys.stderr, msg
    sys.exit(code)

class SMTPChannel(asynchat.async_chat):
    COMMAND = 0
    DATA = 1

def __init__(self, server, conn, addr):
        asynchat.async_chat.__init__(self, conn)
        self.__server = server
        self.__conn = conn
        self.__addr = addr
        self.__line = []
        self.__state = self.COMMAND
        self.__greeting = 0
        self.__mailfrom = None
        self.__rcpttos = []
        self.__data = ''
        self.__fqdn = socket.getfqdn()
        try:
            self.__peer = conn.getpeername()
        except socket.error, err:
            # a race condition  may occur if the other end is closing
            # before we can get the peername
            self.close()
            if err[0] != errno.ENOTCONN:
                raise
            return
        print >> DEBUGSTREAM, 'Peer:', repr(self.__peer)
        self.push('220 %s %s' % (self.__fqdn, __version__))
        self.set_terminator('\r\n')

# Overrides base class for convenience
    def push(self, msg):
        asynchat.async_chat.push(self, msg + '\r\n')

# Implementation of base class abstract method
    def collect_incoming_data(self, data):
        self.__line.append(data)

# Implementation of base class abstract method
    def found_terminator(self):
        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)
            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)

# SMTP and ESMTP commands
    def smtp_HELO(self, arg):
        if not arg:
            self.push('501 Syntax: HELO hostname')
            return
        if self.__greeting:
            self.push('503 Duplicate HELO/EHLO')
        else:
            self.__greeting = arg
            self.push('250 %s' % self.__fqdn)

def smtp_NOOP(self, arg):
        if arg:
            self.push('501 Syntax: NOOP')
        else:
            self.push('250 Ok')

def smtp_QUIT(self, arg):
        # args is ignored
        self.push('221 Bye')
        self.close_when_done()

# factored
    def __getaddr(self, keyword, arg):
        address = None
        keylen = len(keyword)
        if arg[:keylen].upper() == keyword:
            address = arg[keylen:].strip()
            if not address:
                pass
            elif address[0] == '<' and address[-1] == '>' and address != '<>':
                # Addresses can be in the form <person@dom.com> but watch out
                # for null address, e.g. <>
                address = address[1:-1]
        return address

def smtp_MAIL(self, arg):
        print >> DEBUGSTREAM, '===> MAIL', arg
        address = self.__getaddr('FROM:', arg) if arg else None
        if not address:
            self.push('501 Syntax: MAIL FROM:<address>')
            return
        if self.__mailfrom:
            self.push('503 Error: nested MAIL command')
            return
        self.__mailfrom = address
        print >> DEBUGSTREAM, 'sender:', self.__mailfrom
        self.push('250 Ok')

def smtp_RCPT(self, arg):
        print >> DEBUGSTREAM, '===> RCPT', arg
        if not self.__mailfrom:
            self.push('503 Error: need MAIL command')
            return
        address = self.__getaddr('TO:', arg) if arg else None
        if not address:
            self.push('501 Syntax: RCPT TO: <address>')
            return
        self.__rcpttos.append(address)
        print >> DEBUGSTREAM, 'recips:', self.__rcpttos
        self.push('250 Ok')

def smtp_RSET(self, arg):
        if arg:
            self.push('501 Syntax: RSET')
            return
        # Resets the sender, recipients, and data, but not the greeting
        self.__mailfrom = None
        self.__rcpttos = []
        self.__data = ''
        self.__state = self.COMMAND
        self.push('250 Ok')

def smtp_DATA(self, arg):
        if not self.__rcpttos:
            self.push('503 Error: need RCPT command')
            return
        if arg:
            self.push('501 Syntax: DATA')
            return
        self.__state = self.DATA
        self.set_terminator('\r\n.\r\n')
        self.push('354 End data with <CR><LF>.<CR><LF>')

class SMTPServer(asyncore.dispatcher):
    def __init__(self, localaddr, remoteaddr):
        self._localaddr = localaddr
        self._remoteaddr = remoteaddr
        asyncore.dispatcher.__init__(self)
        try:
            self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
            # try to re-use a server port if possible
            self.set_reuse_addr()
            self.bind(localaddr)
            self.listen(5)
        except:
            # cleanup asyncore.socket_map before raising
            self.close()
            raise
        else:
            print >> DEBUGSTREAM, \
                  '%s started at %s\n\tLocal addr: %s\n\tRemote addr:%s' % (
                self.__class__.__name__, time.ctime(time.time()),
                localaddr, remoteaddr)

def handle_accept(self):
        pair = self.accept()
        if pair is not None:
            conn, addr = pair
            print >> DEBUGSTREAM, 'Incoming connection from %s' % repr(addr)
            channel = SMTPChannel(self, conn, addr)

# API for "doing something useful with the message"
    def process_message(self, peer, mailfrom, rcpttos, data):
        """Override this abstract method to handle messages from the client.

peer is a tuple containing (ipaddr, port) of the client that made the
        socket connection to our smtp port.

mailfrom is the raw address the client claims the message is coming
        from.

rcpttos is a list of raw addresses the client wishes to deliver the
        message to.

data is a string containing the entire full text of the message,
        headers (if supplied) and all.  It has been `de-transparencied'
        according to RFC 821, Section 4.5.2.  In other words, a line
        containing a `.' followed by other text has had the leading dot
        removed.

This function should return None, for a normal `250 Ok' response;
        otherwise it returns the desired response string in RFC 821 format.

"""
        raise NotImplementedError

class DebuggingServer(SMTPServer):
    # Do something with the gathered message
    def process_message(self, peer, mailfrom, rcpttos, data):
        inheaders = 1
        lines = data.split('\n')
        print '---------- MESSAGE FOLLOWS ----------'
        for line in lines:
            # headers first
            if inheaders and not line:
                print 'X-Peer:', peer[0]
                inheaders = 0
            print line
        print '------------ END MESSAGE ------------'

class PureProxy(SMTPServer):
    def process_message(self, peer, mailfrom, rcpttos, data):
        lines = data.split('\n')
        # Look for the last header
        i = 0
        for line in lines:
            if not line:
                break
            i += 1
        lines.insert(i, 'X-Peer: %s' % peer[0])
        data = NEWLINE.join(lines)
        refused = self._deliver(mailfrom, rcpttos, data)
        # TBD: what to do with refused addresses?
        print >> DEBUGSTREAM, 'we got some refusals:', refused

def _deliver(self, mailfrom, rcpttos, data):
        import smtplib
        refused = {}
        try:
            s = smtplib.SMTP()
            s.connect(self._remoteaddr[0], self._remoteaddr[1])
            try:
                refused = s.sendmail(mailfrom, rcpttos, data)
            finally:
                s.quit()
        except smtplib.SMTPRecipientsRefused, e:
            print >> DEBUGSTREAM, 'got SMTPRecipientsRefused'
            refused = e.recipients
        except (socket.error, smtplib.SMTPException), e:
            print >> DEBUGSTREAM, 'got', e.__class__
            # All recipients were refused.  If the exception had an associated
            # error code, use it.  Otherwise,fake it with a non-triggering
            # exception code.
            errcode = getattr(e, 'smtp_code', -1)
            errmsg = getattr(e, 'smtp_error', 'ignore')
            for r in rcpttos:
                refused[r] = (errcode, errmsg)
        return refused

class MailmanProxy(PureProxy):
    def process_message(self, peer, mailfrom, rcpttos, data):
        from cStringIO import StringIO
        from Mailman import Utils
        from Mailman import Message
        from Mailman import MailList
        # If the message is to a Mailman mailing list, then we'll invoke the
        # Mailman script directly, without going through the real smtpd.
        # Otherwise we'll forward it to the local proxy for disposition.
        listnames = []
        for rcpt in rcpttos:
            local = rcpt.lower().split('@')[0]
            # We allow the following variations on the theme
            #   listname
            #   listname-admin
            #   listname-owner
            #   listname-request
            #   listname-join
            #   listname-leave
            parts = local.split('-')
            if len(parts) > 2:
                continue
            listname = parts[0]
            if len(parts) == 2:
                command = parts[1]
            else:
                command = ''
            if not Utils.list_exists(listname) or command not in (
                    '', 'admin', 'owner', 'request', 'join', 'leave'):
                continue
            listnames.append((rcpt, listname, command))
        # Remove all list recipients from rcpttos and forward what we're not
        # going to take care of ourselves.  Linear removal should be fine
        # since we don't expect a large number of recipients.
        for rcpt, listname, command in listnames:
            rcpttos.remove(rcpt)
        # If there's any non-list destined recipients left,
        print >> DEBUGSTREAM, 'forwarding recips:', ' '.join(rcpttos)
        if rcpttos:
            refused = self._deliver(mailfrom, rcpttos, data)
            # TBD: what to do with refused addresses?
            print >> DEBUGSTREAM, 'we got refusals:', refused
        # Now deliver directly to the list commands
        mlists = {}
        s = StringIO(data)
        msg = Message.Message(s)
        # These headers are required for the proper execution of Mailman.  All
        # MTAs in existence seem to add these if the original message doesn't
        # have them.
        if not msg.getheader('from'):
            msg['From'] = mailfrom
        if not msg.getheader('date'):
            msg['Date'] = time.ctime(time.time())
        for rcpt, listname, command in listnames:
            print >> DEBUGSTREAM, 'sending message to', rcpt
            mlist = mlists.get(listname)
            if not mlist:
                mlist = MailList.MailList(listname, lock=0)
                mlists[listname] = mlist
            # dispatch on the type of command
            if command == '':
                # post
                msg.Enqueue(mlist, tolist=1)
            elif command == 'admin':
                msg.Enqueue(mlist, toadmin=1)
            elif command == 'owner':
                msg.Enqueue(mlist, toowner=1)
            elif command == 'request':
                msg.Enqueue(mlist, torequest=1)
            elif command in ('join', 'leave'):
                # TBD: this is a hack!
                if command == 'join':
                    msg['Subject'] = 'subscribe'
                else:
                    msg['Subject'] = 'unsubscribe'
                msg.Enqueue(mlist, torequest=1)

class Options:
    setuid = 1
    classname = 'PureProxy'

def parseargs():
    global DEBUGSTREAM
    try:
        opts, args = getopt.getopt(
            sys.argv[1:], 'nVhc:d',
            ['class=', 'nosetuid', 'version', 'help', 'debug'])
    except getopt.error, e:
        usage(1, e)

options = Options()
    for opt, arg in opts:
        if opt in ('-h', '--help'):
            usage(0)
        elif opt in ('-V', '--version'):
            print >> sys.stderr, __version__
            sys.exit(0)
        elif opt in ('-n', '--nosetuid'):
            options.setuid = 0
        elif opt in ('-c', '--class'):
            options.classname = arg
        elif opt in ('-d', '--debug'):
            DEBUGSTREAM = sys.stderr

# parse the rest of the arguments
    if len(args) < 1:
        localspec = 'localhost:8025'
        remotespec = 'localhost:25'
    elif len(args) < 2:
        localspec = args[0]
        remotespec = 'localhost:25'
    elif len(args) < 3:
        localspec = args[0]
        remotespec = args[1]
    else:
        usage(1, 'Invalid arguments: %s' % COMMASPACE.join(args))

# split into host/port pairs
    i = localspec.find(':')
    if i < 0:
        usage(1, 'Bad local spec: %s' % localspec)
    options.localhost = localspec[:i]
    try:
        options.localport = int(localspec[i+1:])
    except ValueError:
        usage(1, 'Bad local port: %s' % localspec)
    i = remotespec.find(':')
    if i < 0:
        usage(1, 'Bad remote spec: %s' % remotespec)
    options.remotehost = remotespec[:i]
    try:
        options.remoteport = int(remotespec[i+1:])
    except ValueError:
        usage(1, 'Bad remote port: %s' % remotespec)
    return options

if __name__ == '__main__':
    options = parseargs()
    # Become nobody
    classname = options.classname
    if "." in classname:
        lastdot = classname.rfind(".")
        mod = __import__(classname[:lastdot], globals(), locals(), [""])
        classname = classname[lastdot+1:]
    else:
        import __main__ as mod
    class_ = getattr(mod, classname)
    proxy = class_((options.localhost, options.localport),
                   (options.remotehost, options.remoteport))
    if options.setuid:
        try:
            import pwd
        except ImportError:
            print >> sys.stderr, \
                  'Cannot import module "pwd"; try running with -n option.'
            sys.exit(1)
        nobody = pwd.getpwnam('nobody')[2]
        try:
            os.setuid(nobody)
        except OSError, e:
            if e.errno != errno.EPERM: raise
            print >> sys.stderr, \
                  'Cannot setuid "nobody"; try running with -n option.'
            sys.exit(1)
    try:
        asyncore.loop()
    except KeyboardInterrupt:
        pass