548 lines
17 KiB
Python
548 lines
17 KiB
Python
"""Test script for poplib module."""
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# Modified by Giampaolo Rodola' to give poplib.POP3 and poplib.POP3_SSL
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# a real test suite
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import poplib
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import asyncore
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import asynchat
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import socket
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import os
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import errno
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import threading
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from unittest import TestCase, skipUnless
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from test import support as test_support
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from test.support import hashlib_helper
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from test.support import socket_helper
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HOST = socket_helper.HOST
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PORT = 0
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SUPPORTS_SSL = False
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if hasattr(poplib, 'POP3_SSL'):
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import ssl
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SUPPORTS_SSL = True
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CERTFILE = os.path.join(os.path.dirname(__file__) or os.curdir, "keycert3.pem")
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CAFILE = os.path.join(os.path.dirname(__file__) or os.curdir, "pycacert.pem")
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requires_ssl = skipUnless(SUPPORTS_SSL, 'SSL not supported')
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# the dummy data returned by server when LIST and RETR commands are issued
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LIST_RESP = b'1 1\r\n2 2\r\n3 3\r\n4 4\r\n5 5\r\n.\r\n'
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RETR_RESP = b"""From: postmaster@python.org\
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\r\nContent-Type: text/plain\r\n\
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MIME-Version: 1.0\r\n\
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Subject: Dummy\r\n\
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\r\n\
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line1\r\n\
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line2\r\n\
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line3\r\n\
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.\r\n"""
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class DummyPOP3Handler(asynchat.async_chat):
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CAPAS = {'UIDL': [], 'IMPLEMENTATION': ['python-testlib-pop-server']}
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enable_UTF8 = False
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def __init__(self, conn):
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asynchat.async_chat.__init__(self, conn)
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self.set_terminator(b"\r\n")
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self.in_buffer = []
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self.push('+OK dummy pop3 server ready. <timestamp>')
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self.tls_active = False
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self.tls_starting = False
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def collect_incoming_data(self, data):
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self.in_buffer.append(data)
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def found_terminator(self):
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line = b''.join(self.in_buffer)
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line = str(line, 'ISO-8859-1')
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self.in_buffer = []
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cmd = line.split(' ')[0].lower()
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space = line.find(' ')
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if space != -1:
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arg = line[space + 1:]
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else:
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arg = ""
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if hasattr(self, 'cmd_' + cmd):
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method = getattr(self, 'cmd_' + cmd)
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method(arg)
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else:
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self.push('-ERR unrecognized POP3 command "%s".' %cmd)
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def handle_error(self):
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raise
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def push(self, data):
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asynchat.async_chat.push(self, data.encode("ISO-8859-1") + b'\r\n')
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def cmd_echo(self, arg):
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# sends back the received string (used by the test suite)
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self.push(arg)
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def cmd_user(self, arg):
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if arg != "guido":
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self.push("-ERR no such user")
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self.push('+OK password required')
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def cmd_pass(self, arg):
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if arg != "python":
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self.push("-ERR wrong password")
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self.push('+OK 10 messages')
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def cmd_stat(self, arg):
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self.push('+OK 10 100')
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def cmd_list(self, arg):
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if arg:
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self.push('+OK %s %s' % (arg, arg))
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else:
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self.push('+OK')
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asynchat.async_chat.push(self, LIST_RESP)
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cmd_uidl = cmd_list
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def cmd_retr(self, arg):
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self.push('+OK %s bytes' %len(RETR_RESP))
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asynchat.async_chat.push(self, RETR_RESP)
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cmd_top = cmd_retr
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def cmd_dele(self, arg):
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self.push('+OK message marked for deletion.')
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def cmd_noop(self, arg):
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self.push('+OK done nothing.')
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def cmd_rpop(self, arg):
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self.push('+OK done nothing.')
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def cmd_apop(self, arg):
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self.push('+OK done nothing.')
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def cmd_quit(self, arg):
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self.push('+OK closing.')
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self.close_when_done()
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def _get_capas(self):
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_capas = dict(self.CAPAS)
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if not self.tls_active and SUPPORTS_SSL:
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_capas['STLS'] = []
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return _capas
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def cmd_capa(self, arg):
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self.push('+OK Capability list follows')
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if self._get_capas():
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for cap, params in self._get_capas().items():
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_ln = [cap]
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if params:
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_ln.extend(params)
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self.push(' '.join(_ln))
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self.push('.')
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def cmd_utf8(self, arg):
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self.push('+OK I know RFC6856'
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if self.enable_UTF8
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else '-ERR What is UTF8?!')
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if SUPPORTS_SSL:
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def cmd_stls(self, arg):
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if self.tls_active is False:
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self.push('+OK Begin TLS negotiation')
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context = ssl.SSLContext()
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context.load_cert_chain(CERTFILE)
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tls_sock = context.wrap_socket(self.socket,
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server_side=True,
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do_handshake_on_connect=False,
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suppress_ragged_eofs=False)
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self.del_channel()
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self.set_socket(tls_sock)
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self.tls_active = True
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self.tls_starting = True
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self.in_buffer = []
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self._do_tls_handshake()
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else:
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self.push('-ERR Command not permitted when TLS active')
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def _do_tls_handshake(self):
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try:
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self.socket.do_handshake()
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except ssl.SSLError as err:
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if err.args[0] in (ssl.SSL_ERROR_WANT_READ,
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ssl.SSL_ERROR_WANT_WRITE):
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return
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elif err.args[0] == ssl.SSL_ERROR_EOF:
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return self.handle_close()
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# TODO: SSLError does not expose alert information
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elif ("SSLV3_ALERT_BAD_CERTIFICATE" in err.args[1] or
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"SSLV3_ALERT_CERTIFICATE_UNKNOWN" in err.args[1]):
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return self.handle_close()
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raise
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except OSError as err:
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if err.args[0] == errno.ECONNABORTED:
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return self.handle_close()
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else:
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self.tls_active = True
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self.tls_starting = False
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def handle_read(self):
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if self.tls_starting:
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self._do_tls_handshake()
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else:
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try:
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asynchat.async_chat.handle_read(self)
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except ssl.SSLEOFError:
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self.handle_close()
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class DummyPOP3Server(asyncore.dispatcher, threading.Thread):
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handler = DummyPOP3Handler
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def __init__(self, address, af=socket.AF_INET):
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threading.Thread.__init__(self)
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asyncore.dispatcher.__init__(self)
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self.daemon = True
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self.create_socket(af, socket.SOCK_STREAM)
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self.bind(address)
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self.listen(5)
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self.active = False
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self.active_lock = threading.Lock()
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self.host, self.port = self.socket.getsockname()[:2]
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self.handler_instance = None
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def start(self):
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assert not self.active
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self.__flag = threading.Event()
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threading.Thread.start(self)
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self.__flag.wait()
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def run(self):
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self.active = True
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self.__flag.set()
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try:
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while self.active and asyncore.socket_map:
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with self.active_lock:
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asyncore.loop(timeout=0.1, count=1)
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finally:
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asyncore.close_all(ignore_all=True)
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def stop(self):
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assert self.active
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self.active = False
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self.join()
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def handle_accepted(self, conn, addr):
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self.handler_instance = self.handler(conn)
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def handle_connect(self):
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self.close()
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handle_read = handle_connect
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def writable(self):
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return 0
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def handle_error(self):
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raise
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class TestPOP3Class(TestCase):
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def assertOK(self, resp):
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self.assertTrue(resp.startswith(b"+OK"))
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def setUp(self):
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self.server = DummyPOP3Server((HOST, PORT))
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self.server.start()
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self.client = poplib.POP3(self.server.host, self.server.port,
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timeout=test_support.LOOPBACK_TIMEOUT)
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def tearDown(self):
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self.client.close()
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self.server.stop()
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# Explicitly clear the attribute to prevent dangling thread
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self.server = None
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def test_getwelcome(self):
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self.assertEqual(self.client.getwelcome(),
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b'+OK dummy pop3 server ready. <timestamp>')
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def test_exceptions(self):
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self.assertRaises(poplib.error_proto, self.client._shortcmd, 'echo -err')
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def test_user(self):
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self.assertOK(self.client.user('guido'))
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self.assertRaises(poplib.error_proto, self.client.user, 'invalid')
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def test_pass_(self):
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self.assertOK(self.client.pass_('python'))
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self.assertRaises(poplib.error_proto, self.client.user, 'invalid')
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def test_stat(self):
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self.assertEqual(self.client.stat(), (10, 100))
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def test_list(self):
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self.assertEqual(self.client.list()[1:],
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([b'1 1', b'2 2', b'3 3', b'4 4', b'5 5'],
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25))
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self.assertTrue(self.client.list('1').endswith(b"OK 1 1"))
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def test_retr(self):
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expected = (b'+OK 116 bytes',
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[b'From: postmaster@python.org', b'Content-Type: text/plain',
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b'MIME-Version: 1.0', b'Subject: Dummy',
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b'', b'line1', b'line2', b'line3'],
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113)
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foo = self.client.retr('foo')
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self.assertEqual(foo, expected)
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def test_too_long_lines(self):
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self.assertRaises(poplib.error_proto, self.client._shortcmd,
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'echo +%s' % ((poplib._MAXLINE + 10) * 'a'))
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def test_dele(self):
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self.assertOK(self.client.dele('foo'))
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def test_noop(self):
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self.assertOK(self.client.noop())
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def test_rpop(self):
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self.assertOK(self.client.rpop('foo'))
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@hashlib_helper.requires_hashdigest('md5')
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def test_apop_normal(self):
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self.assertOK(self.client.apop('foo', 'dummypassword'))
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@hashlib_helper.requires_hashdigest('md5')
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def test_apop_REDOS(self):
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# Replace welcome with very long evil welcome.
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# NB The upper bound on welcome length is currently 2048.
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# At this length, evil input makes each apop call take
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# on the order of milliseconds instead of microseconds.
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evil_welcome = b'+OK' + (b'<' * 1000000)
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with test_support.swap_attr(self.client, 'welcome', evil_welcome):
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# The evil welcome is invalid, so apop should throw.
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self.assertRaises(poplib.error_proto, self.client.apop, 'a', 'kb')
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def test_top(self):
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expected = (b'+OK 116 bytes',
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[b'From: postmaster@python.org', b'Content-Type: text/plain',
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b'MIME-Version: 1.0', b'Subject: Dummy', b'',
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b'line1', b'line2', b'line3'],
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113)
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self.assertEqual(self.client.top(1, 1), expected)
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def test_uidl(self):
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self.client.uidl()
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self.client.uidl('foo')
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def test_utf8_raises_if_unsupported(self):
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self.server.handler.enable_UTF8 = False
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self.assertRaises(poplib.error_proto, self.client.utf8)
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def test_utf8(self):
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self.server.handler.enable_UTF8 = True
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expected = b'+OK I know RFC6856'
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result = self.client.utf8()
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self.assertEqual(result, expected)
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def test_capa(self):
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capa = self.client.capa()
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self.assertTrue('IMPLEMENTATION' in capa.keys())
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def test_quit(self):
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resp = self.client.quit()
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self.assertTrue(resp)
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self.assertIsNone(self.client.sock)
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self.assertIsNone(self.client.file)
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@requires_ssl
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def test_stls_capa(self):
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capa = self.client.capa()
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self.assertTrue('STLS' in capa.keys())
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@requires_ssl
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def test_stls(self):
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expected = b'+OK Begin TLS negotiation'
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resp = self.client.stls()
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self.assertEqual(resp, expected)
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@requires_ssl
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def test_stls_context(self):
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expected = b'+OK Begin TLS negotiation'
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ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
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ctx.load_verify_locations(CAFILE)
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self.assertEqual(ctx.verify_mode, ssl.CERT_REQUIRED)
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self.assertEqual(ctx.check_hostname, True)
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with self.assertRaises(ssl.CertificateError):
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resp = self.client.stls(context=ctx)
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self.client = poplib.POP3("localhost", self.server.port,
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timeout=test_support.LOOPBACK_TIMEOUT)
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resp = self.client.stls(context=ctx)
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self.assertEqual(resp, expected)
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if SUPPORTS_SSL:
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from test.test_ftplib import SSLConnection
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class DummyPOP3_SSLHandler(SSLConnection, DummyPOP3Handler):
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def __init__(self, conn):
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asynchat.async_chat.__init__(self, conn)
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self.secure_connection()
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self.set_terminator(b"\r\n")
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self.in_buffer = []
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self.push('+OK dummy pop3 server ready. <timestamp>')
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self.tls_active = True
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self.tls_starting = False
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@requires_ssl
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class TestPOP3_SSLClass(TestPOP3Class):
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# repeat previous tests by using poplib.POP3_SSL
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def setUp(self):
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self.server = DummyPOP3Server((HOST, PORT))
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self.server.handler = DummyPOP3_SSLHandler
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self.server.start()
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self.client = poplib.POP3_SSL(self.server.host, self.server.port)
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def test__all__(self):
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self.assertIn('POP3_SSL', poplib.__all__)
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def test_context(self):
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ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
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ctx.check_hostname = False
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ctx.verify_mode = ssl.CERT_NONE
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self.assertRaises(ValueError, poplib.POP3_SSL, self.server.host,
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self.server.port, keyfile=CERTFILE, context=ctx)
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self.assertRaises(ValueError, poplib.POP3_SSL, self.server.host,
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self.server.port, certfile=CERTFILE, context=ctx)
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self.assertRaises(ValueError, poplib.POP3_SSL, self.server.host,
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self.server.port, keyfile=CERTFILE,
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certfile=CERTFILE, context=ctx)
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self.client.quit()
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self.client = poplib.POP3_SSL(self.server.host, self.server.port,
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context=ctx)
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self.assertIsInstance(self.client.sock, ssl.SSLSocket)
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self.assertIs(self.client.sock.context, ctx)
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self.assertTrue(self.client.noop().startswith(b'+OK'))
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def test_stls(self):
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self.assertRaises(poplib.error_proto, self.client.stls)
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test_stls_context = test_stls
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def test_stls_capa(self):
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capa = self.client.capa()
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self.assertFalse('STLS' in capa.keys())
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@requires_ssl
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class TestPOP3_TLSClass(TestPOP3Class):
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# repeat previous tests by using poplib.POP3.stls()
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def setUp(self):
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self.server = DummyPOP3Server((HOST, PORT))
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self.server.start()
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self.client = poplib.POP3(self.server.host, self.server.port,
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timeout=test_support.LOOPBACK_TIMEOUT)
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self.client.stls()
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def tearDown(self):
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if self.client.file is not None and self.client.sock is not None:
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try:
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self.client.quit()
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except poplib.error_proto:
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# happens in the test_too_long_lines case; the overlong
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# response will be treated as response to QUIT and raise
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# this exception
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self.client.close()
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self.server.stop()
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# Explicitly clear the attribute to prevent dangling thread
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self.server = None
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def test_stls(self):
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self.assertRaises(poplib.error_proto, self.client.stls)
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test_stls_context = test_stls
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def test_stls_capa(self):
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capa = self.client.capa()
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self.assertFalse(b'STLS' in capa.keys())
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class TestTimeouts(TestCase):
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def setUp(self):
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self.evt = threading.Event()
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.sock.settimeout(60) # Safety net. Look issue 11812
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self.port = socket_helper.bind_port(self.sock)
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self.thread = threading.Thread(target=self.server, args=(self.evt, self.sock))
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self.thread.daemon = True
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self.thread.start()
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self.evt.wait()
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def tearDown(self):
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self.thread.join()
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# Explicitly clear the attribute to prevent dangling thread
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self.thread = None
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def server(self, evt, serv):
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serv.listen()
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evt.set()
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try:
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conn, addr = serv.accept()
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conn.send(b"+ Hola mundo\n")
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conn.close()
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except socket.timeout:
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pass
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finally:
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serv.close()
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def testTimeoutDefault(self):
|
|
self.assertIsNone(socket.getdefaulttimeout())
|
|
socket.setdefaulttimeout(test_support.LOOPBACK_TIMEOUT)
|
|
try:
|
|
pop = poplib.POP3(HOST, self.port)
|
|
finally:
|
|
socket.setdefaulttimeout(None)
|
|
self.assertEqual(pop.sock.gettimeout(), test_support.LOOPBACK_TIMEOUT)
|
|
pop.close()
|
|
|
|
def testTimeoutNone(self):
|
|
self.assertIsNone(socket.getdefaulttimeout())
|
|
socket.setdefaulttimeout(30)
|
|
try:
|
|
pop = poplib.POP3(HOST, self.port, timeout=None)
|
|
finally:
|
|
socket.setdefaulttimeout(None)
|
|
self.assertIsNone(pop.sock.gettimeout())
|
|
pop.close()
|
|
|
|
def testTimeoutValue(self):
|
|
pop = poplib.POP3(HOST, self.port, timeout=test_support.LOOPBACK_TIMEOUT)
|
|
self.assertEqual(pop.sock.gettimeout(), test_support.LOOPBACK_TIMEOUT)
|
|
pop.close()
|
|
with self.assertRaises(ValueError):
|
|
poplib.POP3(HOST, self.port, timeout=0)
|
|
|
|
|
|
def test_main():
|
|
tests = [TestPOP3Class, TestTimeouts,
|
|
TestPOP3_SSLClass, TestPOP3_TLSClass]
|
|
thread_info = test_support.threading_setup()
|
|
try:
|
|
test_support.run_unittest(*tests)
|
|
finally:
|
|
test_support.threading_cleanup(*thread_info)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|