def setup(self):
self.request.sendall("Welcome to POP server, 127.0.0.1!\r\n")
self.AUTHORIZATION = True
self.user = None
self.TRANSACTION = False
self.queries = DBQueries()
self.accepted_methods = dict((("USER", self.user_method), ("PASS", self.pass_method),
("LIST", self.list_method), ("RETR", self.retr_method),
("QUIT", self.quit_method)))
class POP3Handler(SocketServer.BaseRequestHandler):
"""
The RequestHandler class for our server.
It is instantiated once per connection to the server, and must
override the handle() method to implement communication to the
client.
"""
ERR = "-ERR\r\n"
OK = "+OK\r\n"
def setup(self):
self.request.sendall("Welcome to POP server, 127.0.0.1!\r\n")
self.AUTHORIZATION = True
self.user = None
self.TRANSACTION = False
self.queries = DBQueries()
self.accepted_methods = dict((("USER", self.user_method), ("PASS", self.pass_method),
("LIST", self.list_method), ("RETR", self.retr_method),
("QUIT", self.quit_method)))
def handle(self):
while self.AUTHORIZATION:
self.process_request_data()
def process_request_data(self):
data = self.request.recv(1024).strip()
self.data = data.split()
if self.data:
POP3_method = self.data[0]
if POP3_method in self.accepted_methods:
self.accepted_methods[POP3_method]()
else:
self.request.sendall("Method is not accepted!\r\n")
# implements QUIT POP3 method behavior
def quit_method(self):
self.AUTHORIZATION = False
self.request.sendall("Bye!\r\n")
# implements USER POP3 method behavior
def user_method(self):
if not self.TRANSACTION:
if len(self.data) > 1:
self.user = self.data[1]
if self.queries.user_exists(self.user):
self.request.sendall(self.OK)
return
self.request.sendall(self.ERR)
# implements PASS POP3 method behavior
def pass_method(self):
if not self.TRANSACTION:
if len(self.data) > 1:
passw = self.data[1]
if self.user:
if self.queries.authenticate_user(self.user, passw):
self.TRANSACTION = True
self.request.sendall(self.OK)
return
self.request.sendall(self.ERR)
# implements LIST POP3 method behavior
def list_method(self):
if self.TRANSACTION:
emails = self.queries.get_user_emails(self.user)
if emails:
str_list = [self.OK, "You've got {} letters in your mailbox\r\n".format(len(emails)),
"\r\n".join(emails), "\r\nFeel free to fetch any with RETR command\r\n"]
self.request.sendall("".join(str_list))
return
self.request.sendall(self.ERR)
# implements RETR POP3 method behavior
def retr_method(self):
if len(self.data) > 1:
id = self.data[1]
subject, body = self.queries.get_email(id)
self.request.sendall("Subject: {subject}\r\n{body}".format(subject=subject, body=body))
return
self.request.sendall(self.ERR)
class DbQueriesTestCaise(TestCase):
def setUp(self):
self.queries = DBQueries()
self.queries.clear_tables()
self.queries.fill_users()
self.queries.fill_emails()
def tearDown(self):
self.queries.clear_tables()
def test_user_exists(self):
self.assertTrue(self.queries.user_exists("Pablo"))
self.assertFalse(self.queries.user_exists("Hose"))
def test_authenticate_user(self):
self.assertTrue(self.queries.authenticate_user("Pablo", "Pikasso"))
self.assertFalse(self.queries.authenticate_user("Pablo", "qwerty"))
def test_passw_hash(self):
passw_hash = hashlib.sha224("qwerty").hexdigest()
self.assertEqual(self.queries.passw_hash("qwerty"), passw_hash)
self.assertNotEqual(self.queries.passw_hash("asdfg"), passw_hash)
def test_get_user_emails(self):
self.assertEqual(self.queries.get_user_emails("Khil"), ["1 Khil's email"])
self.assertNotEqual(self.queries.get_user_emails("Pablo"), ["1 Khil's email"])
def test_get_email(self):
expected_subject = "Pablo's email"
expected_body = ";ksjhdflvkahbdcjsdhbfcsjkdavkjsdhvcakjs"
subject, body = self.queries.get_email(2)
self.assertEqual(subject, expected_subject)
self.assertEqual(body, expected_body)
subject, body = self.queries.get_email(1)
self.assertNotEqual(subject, expected_subject)
self.assertNotEqual(body, expected_body)
def setUp(self):
self.queries = DBQueries()
self.queries.clear_tables()
self.queries.fill_users()
self.queries.fill_emails()
