"""A POP3 client class. Based on the J. Myers POP3 draft, Jan. 96""" # Author: David Ascher <david_ascher@brown.edu># [heavily stealing from nntplib.py]# Updated: Piers Lauder <piers@cs.su.oz.au> [Jul '97]# String method conversion and test jig improvements by ESR, February 2001.# Added the POP3_SSL class. Methods loosely based on IMAP_SSL. Hector Urtubia <urtubia@mrbook.org> Aug 2003 # Example (see the test function at the end of this file) # Imports import re, socket __all__ = ["POP3","error_proto","POP3_SSL"] # Exception raised when an error or invalid response is received: class error_proto(Exception): pass # Standard PortPOP3_PORT = 110 # POP SSL PORTPOP3_SSL_PORT = 995 # Line terminators (we always output CRLF, but accept any of CRLF, LFCR, LF)CR = '\r'LF = '\n'CRLF = CR+LF class POP3: """This class supports both the minimal and optional command sets. Arguments can be strings or integers (where appropriate) (e.g.: retr(1) and retr('1') both work equally well. Minimal Command Set: USER name user(name) PASS string pass_(string) STAT stat() LIST [msg] list(msg = None) RETR msg retr(msg) DELE msg dele(msg) NOOP noop() RSET rset() QUIT quit() Optional Commands (some servers support these): RPOP name rpop(name) APOP name digest apop(name, digest) TOP msg n top(msg, n) UIDL [msg] uidl(msg = None) Raises one exception: 'error_proto'. Instantiate with: POP3(hostname, port=110) NB: the POP protocol locks the mailbox from user authorization until QUIT, so be sure to get in, suck the messages, and quit, each time you access the mailbox. POP is a line-based protocol, which means large mail messages consume lots of python cycles reading them line-by-line. If it's available on your mail server, use IMAP4 instead, it doesn't suffer from the two problems above. """ def __init__(self, host, port = POP3_PORT): self.host = host self.port = port msg = "getaddrinfo returns an empty list" self.sock = None for res in socket.getaddrinfo(self.host, self.port, 0, socket.SOCK_STREAM): af, socktype, proto, canonname, sa = res try: self.sock = socket.socket(af, socktype, proto) self.sock.connect(sa) except socket.error, msg: if self.sock: self.sock.close() self.sock = None continue break if not self.sock: raise socket.error, msg self.file = self.sock.makefile('rb') self._debugging = 0 self.welcome = self._getresp() def _putline(self, line): if self._debugging > 1: print '*put*', repr(line) self.sock.sendall('%s%s' % (line, CRLF)) # Internal: send one command to the server (through _putline()) def _putcmd(self, line): if self._debugging: print '*cmd*', repr(line) self._putline(line) # Internal: return one line from the server, stripping CRLF. # This is where all the CPU time of this module is consumed. # Raise error_proto('-ERR EOF') if the connection is closed. def _getline(self): line = self.file.readline() if self._debugging > 1: print '*get*', repr(line) if not line: raise error_proto('-ERR EOF') octets = len(line) # server can send any combination of CR & LF # however, 'readline()' returns lines ending in LF # so only possibilities are ...LF, ...CRLF, CR...LF if line[-2:] == CRLF: return line[:-2], octets if line[0] == CR: return line[1:-1], octets return line[:-1], octets # Internal: get a response from the server. # Raise 'error_proto' if the response doesn't start with '+'. def _getresp(self): resp, o = self._getline() if self._debugging > 1: print '*resp*', repr(resp) c = resp[:1] if c != '+': raise error_proto(resp) return resp # Internal: get a response plus following text from the server. def _getlongresp(self): resp = self._getresp() list = []; octets = 0 line, o = self._getline() while line != '.': if line[:2] == '..': o = o-1 line = line[1:] octets = octets + o list.append(line) line, o = self._getline() return resp, list, octets # Internal: send a command and get the response def _shortcmd(self, line): self._putcmd(line) return self._getresp() # Internal: send a command and get the response plus following text def _longcmd(self, line): self._putcmd(line) return self._getlongresp() # These can be useful: def getwelcome(self): return self.welcome def set_debuglevel(self, level): self._debugging = level # Here are all the POP commands: def user(self, user): """Send user name, return response (should indicate password required). """ return self._shortcmd('USER %s' % user) def pass_(self, pswd): """Send password, return response (response includes message count, mailbox size). NB: mailbox is locked by server from here to 'quit()' """ return self._shortcmd('PASS %s' % pswd) def stat(self): """Get mailbox status. Result is tuple of 2 ints (message count, mailbox size) """ retval = self._shortcmd('STAT') rets = retval.split() if self._debugging: print '*stat*', repr(rets) numMessages = int(rets[1]) sizeMessages = int(rets[2]) return (numMessages, sizeMessages) def list(self, which=None): """Request listing, return result. Result without a message number argument is in form ['response', ['mesg_num octets', ...], octets]. Result when a message number argument is given is a single response: the "scan listing" for that message. """ if which is not None: return self._shortcmd('LIST %s' % which) return self._longcmd('LIST') def retr(self, which): """Retrieve whole message number 'which'. Result is in form ['response', ['line', ...], octets]. """ return self._longcmd('RETR %s' % which) def dele(self, which): """Delete message number 'which'. Result is 'response'. """ return self._shortcmd('DELE %s' % which) def noop(self): """Does nothing. One supposes the response indicates the server is alive. """ return self._shortcmd('NOOP') def rset(self): """Not sure what this does.""" return self._shortcmd('RSET') def quit(self): """Signoff: commit changes on server, unlock mailbox, close connection.""" try: resp = self._shortcmd('QUIT') except error_proto, val: resp = val self.file.close() self.sock.close() del self.file, self.sock return resp #__del__ = quit # optional commands: def rpop(self, user): """Not sure what this does.""" return self._shortcmd('RPOP %s' % user) timestamp = re.compile(r'\+OK.*(<[^>]+>)') def apop(self, user, secret): """Authorisation - only possible if server has supplied a timestamp in initial greeting. Args: user - mailbox user; secret - secret shared between client and server. NB: mailbox is locked by server from here to 'quit()' """ m = self.timestamp.match(self.welcome) if not m: raise error_proto('-ERR APOP not supported by server') import hashlib digest = hashlib.md5(m.group(1)+secret).digest() digest = ''.join(map(lambda x:'%02x'%ord(x), digest)) return self._shortcmd('APOP %s %s' % (user, digest)) def top(self, which, howmuch): """Retrieve message header of message number 'which' and first 'howmuch' lines of message body. Result is in form ['response', ['line', ...], octets]. """ return self._longcmd('TOP %s %s' % (which, howmuch)) def uidl(self, which=None): """Return message digest (unique id) list. If 'which', result contains unique id for that message in the form 'response mesgnum uid', otherwise result is the list ['response', ['mesgnum uid', ...], octets] """ if which is not None: return self._shortcmd('UIDL %s' % which) return self._longcmd('UIDL') class POP3_SSL(POP3): """POP3 client class over SSL connection Instantiate with: POP3_SSL(hostname, port=995, keyfile=None, certfile=None) hostname - the hostname of the pop3 over ssl server port - port number keyfile - PEM formatted file that countains your private key certfile - PEM formatted certificate chain file See the methods of the parent class POP3 for more documentation. """ def __init__(self, host, port = POP3_SSL_PORT, keyfile = None, certfile = None): self.host = host self.port = port self.keyfile = keyfile self.certfile = certfile self.buffer = "" msg = "getaddrinfo returns an empty list" self.sock = None for res in socket.getaddrinfo(self.host, self.port, 0, socket.SOCK_STREAM): af, socktype, proto, canonname, sa = res try: self.sock = socket.socket(af, socktype, proto) self.sock.connect(sa) except socket.error, msg: if self.sock: self.sock.close() self.sock = None continue break if not self.sock: raise socket.error, msg self.file = self.sock.makefile('rb') self.sslobj = socket.ssl(self.sock, self.keyfile, self.certfile) self._debugging = 0 self.welcome = self._getresp() def _fillBuffer(self): localbuf = self.sslobj.read() if len(localbuf) == 0: raise error_proto('-ERR EOF') self.buffer += localbuf def _getline(self): line = "" renewline = re.compile(r'.*?\n') match = renewline.match(self.buffer) while not match: self._fillBuffer() match = renewline.match(self.buffer) line = match.group(0) self.buffer = renewline.sub('' ,self.buffer, 1) if self._debugging > 1: print '*get*', repr(line) octets = len(line) if line[-2:] == CRLF: return line[:-2], octets if line[0] == CR: return line[1:-1], octets return line[:-1], octets def _putline(self, line): if self._debugging > 1: print '*put*', repr(line) line += CRLF bytes = len(line) while bytes > 0: sent = self.sslobj.write(line) if sent == bytes: break # avoid copy line = line[sent:] bytes = bytes - sent def quit(self): """Signoff: commit changes on server, unlock mailbox, close connection.""" try: resp = self._shortcmd('QUIT') except error_proto, val: resp = val self.sock.close() del self.sslobj, self.sock return resp if __name__ == "__main__": import sys a = POP3(sys.argv[1]) print a.getwelcome() a.user(sys.argv[2]) a.pass_(sys.argv[3]) a.list() (numMsgs, totalSize) = a.stat() for i in range(1, numMsgs + 1): (header, msg, octets) = a.retr(i) print "Message %d:" % i for line in msg: print ' ' + line print '-----------------------' a.quit()
"""A POP3 client class.
Based on the J. Myers POP3 draft, Jan. 96
"""
# Author: David Ascher <david_ascher@brown.edu>
# [heavily stealing from nntplib.py]
# Updated: Piers Lauder <piers@cs.su.oz.au> [Jul '97]
# String method conversion and test jig improvements by ESR, February 2001.
# Added the POP3_SSL class. Methods loosely based on IMAP_SSL. Hector Urtubia <urtubia@mrbook.org> Aug 2003
# Example (see the test function at the end of this file)
# Imports
import re, socket
__all__ = ["POP3","error_proto","POP3_SSL"]
# Exception raised when an error or invalid response is received:
class error_proto(Exception): pass
# Standard Port
POP3_PORT = 110
# POP SSL PORT
POP3_SSL_PORT = 995
# Line terminators (we always output CRLF, but accept any of CRLF, LFCR, LF)
CR = '\r'
LF = '\n'
CRLF = CR+LF
class POP3:
"""This class supports both the minimal and optional command sets.
Arguments can be strings or integers (where appropriate)
(e.g.: retr(1) and retr('1') both work equally well.
Minimal Command Set:
USER name user(name)
PASS string pass_(string)
STAT stat()
LIST [msg] list(msg = None)
RETR msg retr(msg)
DELE msg dele(msg)
NOOP noop()
RSET rset()
QUIT quit()
Optional Commands (some servers support these):
RPOP name rpop(name)
APOP name digest apop(name, digest)
TOP msg n top(msg, n)
UIDL [msg] uidl(msg = None)
Raises one exception: 'error_proto'.
Instantiate with:
POP3(hostname, port=110)
NB: the POP protocol locks the mailbox from user
authorization until QUIT, so be sure to get in, suck
the messages, and quit, each time you access the
mailbox.
POP is a line-based protocol, which means large mail
messages consume lots of python cycles reading them
line-by-line.
If it's available on your mail server, use IMAP4
instead, it doesn't suffer from the two problems
above.
"""
def __init__(self, host, port = POP3_PORT):
self.host = host
self.port = port
msg = "getaddrinfo returns an empty list"
self.sock = None
for res in socket.getaddrinfo(self.host, self.port, 0, socket.SOCK_STREAM):
af, socktype, proto, canonname, sa = res
try:
self.sock = socket.socket(af, socktype, proto)
self.sock.connect(sa)
except socket.error, msg:
if self.sock:
self.sock.close()
self.sock = None
continue
break
if not self.sock:
raise socket.error, msg
self.file = self.sock.makefile('rb')
self._debugging = 0
self.welcome = self._getresp()
def _putline(self, line):
if self._debugging > 1: print '*put*', repr(line)
self.sock.sendall('%s%s' % (line, CRLF))
# Internal: send one command to the server (through _putline())
def _putcmd(self, line):
if self._debugging: print '*cmd*', repr(line)
self._putline(line)
# Internal: return one line from the server, stripping CRLF.
# This is where all the CPU time of this module is consumed.
# Raise error_proto('-ERR EOF') if the connection is closed.
def _getline(self):
line = self.file.readline()
if self._debugging > 1: print '*get*', repr(line)
if not line: raise error_proto('-ERR EOF')
octets = len(line)
# server can send any combination of CR & LF
# however, 'readline()' returns lines ending in LF
# so only possibilities are ...LF, ...CRLF, CR...LF
if line[-2:] == CRLF:
return line[:-2], octets
if line[0] == CR:
return line[1:-1], octets
return line[:-1], octets
# Internal: get a response from the server.
# Raise 'error_proto' if the response doesn't start with '+'.
def _getresp(self):
resp, o = self._getline()
if self._debugging > 1: print '*resp*', repr(resp)
c = resp[:1]
if c != '+':
raise error_proto(resp)
return resp
# Internal: get a response plus following text from the server.
def _getlongresp(self):
resp = self._getresp()
list = []; octets = 0
line, o = self._getline()
while line != '.':
if line[:2] == '..':
o = o-1
line = line[1:]
octets = octets + o
list.append(line)
line, o = self._getline()
return resp, list, octets
# Internal: send a command and get the response
def _shortcmd(self, line):
self._putcmd(line)
return self._getresp()
# Internal: send a command and get the response plus following text
def _longcmd(self, line):
self._putcmd(line)
return self._getlongresp()
# These can be useful:
def getwelcome(self):
return self.welcome
def set_debuglevel(self, level):
self._debugging = level
# Here are all the POP commands:
def user(self, user):
"""Send user name, return response
(should indicate password required).
"""
return self._shortcmd('USER %s' % user)
def pass_(self, pswd):
"""Send password, return response
(response includes message count, mailbox size).
NB: mailbox is locked by server from here to 'quit()'
"""
return self._shortcmd('PASS %s' % pswd)
def stat(self):
"""Get mailbox status.
Result is tuple of 2 ints (message count, mailbox size)
"""
retval = self._shortcmd('STAT')
rets = retval.split()
if self._debugging: print '*stat*', repr(rets)
numMessages = int(rets[1])
sizeMessages = int(rets[2])
return (numMessages, sizeMessages)
def list(self, which=None):
"""Request listing, return result.
Result without a message number argument is in form
['response', ['mesg_num octets', ...], octets].
Result when a message number argument is given is a
single response: the "scan listing" for that message.
"""
if which is not None:
return self._shortcmd('LIST %s' % which)
return self._longcmd('LIST')
def retr(self, which):
"""Retrieve whole message number 'which'.
Result is in form ['response', ['line', ...], octets].
"""
return self._longcmd('RETR %s' % which)
def dele(self, which):
"""Delete message number 'which'.
Result is 'response'.
"""
return self._shortcmd('DELE %s' % which)
def noop(self):
"""Does nothing.
One supposes the response indicates the server is alive.
"""
return self._shortcmd('NOOP')
def rset(self):
"""Not sure what this does."""
return self._shortcmd('RSET')
def quit(self):
"""Signoff: commit changes on server, unlock mailbox, close connection."""
try:
resp = self._shortcmd('QUIT')
except error_proto, val:
resp = val
self.file.close()
self.sock.close()
del self.file, self.sock
return resp
#__del__ = quit
# optional commands:
def rpop(self, user):
"""Not sure what this does."""
return self._shortcmd('RPOP %s' % user)
timestamp = re.compile(r'\+OK.*(<[^>]+>)')
def apop(self, user, secret):
"""Authorisation
- only possible if server has supplied a timestamp in initial greeting.
Args:
user - mailbox user;
secret - secret shared between client and server.
NB: mailbox is locked by server from here to 'quit()'
"""
m = self.timestamp.match(self.welcome)
if not m:
raise error_proto('-ERR APOP not supported by server')
import hashlib
digest = hashlib.md5(m.group(1)+secret).digest()
digest = ''.join(map(lambda x:'%02x'%ord(x), digest))
return self._shortcmd('APOP %s %s' % (user, digest))
def top(self, which, howmuch):
"""Retrieve message header of message number 'which'
and first 'howmuch' lines of message body.
Result is in form ['response', ['line', ...], octets].
"""
return self._longcmd('TOP %s %s' % (which, howmuch))
def uidl(self, which=None):
"""Return message digest (unique id) list.
If 'which', result contains unique id for that message
in the form 'response mesgnum uid', otherwise result is
the list ['response', ['mesgnum uid', ...], octets]
"""
if which is not None:
return self._shortcmd('UIDL %s' % which)
return self._longcmd('UIDL')
class POP3_SSL(POP3):
"""POP3 client class over SSL connection
Instantiate with: POP3_SSL(hostname, port=995, keyfile=None, certfile=None)
hostname - the hostname of the pop3 over ssl server
port - port number
keyfile - PEM formatted file that countains your private key
certfile - PEM formatted certificate chain file
See the methods of the parent class POP3 for more documentation.
"""
def __init__(self, host, port = POP3_SSL_PORT, keyfile = None, certfile = None):
self.host = host
self.port = port
self.keyfile = keyfile
self.certfile = certfile
self.buffer = ""
msg = "getaddrinfo returns an empty list"
self.sock = None
for res in socket.getaddrinfo(self.host, self.port, 0, socket.SOCK_STREAM):
af, socktype, proto, canonname, sa = res
try:
self.sock = socket.socket(af, socktype, proto)
self.sock.connect(sa)
except socket.error, msg:
if self.sock:
self.sock.close()
self.sock = None
continue
break
if not self.sock:
raise socket.error, msg
self.file = self.sock.makefile('rb')
self.sslobj = socket.ssl(self.sock, self.keyfile, self.certfile)
self._debugging = 0
self.welcome = self._getresp()
def _fillBuffer(self):
localbuf = self.sslobj.read()
if len(localbuf) == 0:
raise error_proto('-ERR EOF')
self.buffer += localbuf
def _getline(self):
line = ""
renewline = re.compile(r'.*?\n')
match = renewline.match(self.buffer)
while not match:
self._fillBuffer()
match = renewline.match(self.buffer)
line = match.group(0)
self.buffer = renewline.sub('' ,self.buffer, 1)
if self._debugging > 1: print '*get*', repr(line)
octets = len(line)
if line[-2:] == CRLF:
return line[:-2], octets
if line[0] == CR:
return line[1:-1], octets
return line[:-1], octets
def _putline(self, line):
if self._debugging > 1: print '*put*', repr(line)
line += CRLF
bytes = len(line)
while bytes > 0:
sent = self.sslobj.write(line)
if sent == bytes:
break # avoid copy
line = line[sent:]
bytes = bytes - sent
def quit(self):
"""Signoff: commit changes on server, unlock mailbox, close connection."""
try:
resp = self._shortcmd('QUIT')
except error_proto, val:
resp = val
self.sock.close()
del self.sslobj, self.sock
return resp
if __name__ == "__main__":
import sys
a = POP3(sys.argv[1])
print a.getwelcome()
a.user(sys.argv[2])
a.pass_(sys.argv[3])
a.list()
(numMsgs, totalSize) = a.stat()
for i in range(1, numMsgs + 1):
(header, msg, octets) = a.retr(i)
print "Message %d:" % i
for line in msg:
print ' ' + line
print '-----------------------'
a.quit()