def test_useToken(self):
"""
You can use tokens.
"""
d = TimedTokenDispenser(store=MemoryStore(task.Clock()),
clock=task.Clock())
t1 = yield d.getToken('foo')
yield d.useToken(t1)
def test_getToken_unique(self):
"""
You can get tokens from the dispenser which are unique.
"""
d = TimedTokenDispenser(store=MemoryStore(task.Clock()),
clock=task.Clock())
t1 = yield d.getToken('foo')
t2 = yield d.getToken('foo')
self.assertNotEqual(t1, t2)
def test_tokenExpires(self):
"""
Tokens expire after a certain amount of time.
"""
clock = task.Clock()
d = TimedTokenDispenser(expiration=50, store=MemoryStore(clock),
clock=clock)
token = yield d.getToken('foo')
clock.advance(50)
yield self.assertFailure(d.useToken(token), InvalidToken)
def test_getToken_limitByKey(self):
"""
Tokens are limited in number according to the key.
"""
clock = task.Clock()
d = TimedTokenDispenser(available=2, store=MemoryStore(clock),
clock=clock)
yield d.getToken('foo')
yield d.getToken('foo')
yield self.assertFailure(d.getToken('foo'), NoTokensLeft)
yield d.getToken('bar')
def test_getToken_replenish(self):
"""
Tokens are replenished over time.
"""
clock = task.Clock()
d = TimedTokenDispenser(available=2, refresh=10,
store=MemoryStore(clock),
clock=clock)
a = yield d.getToken('foo')
clock.advance(5)
a = yield d.getToken('foo')
yield self.assertFailure(d.getToken('foo'), NoTokensLeft)
clock.advance(5)
yield d.getToken('foo')
yield self.assertFailure(d.getToken('foo'), NoTokensLeft)
clock.advance(5)
yield d.getToken('foo')
def start(reactor):
log.startLogging(sys.stdout)
url = os.environ.get('DATABASE_URL', None)
if url is None:
raise Exception('You must set DATABASE_URL')
captcha_private = os.environ.get('CAPTCHA_PRIVATE_KEY', None)
if captcha_private is None:
raise Exception("You must provide a CAPTCHA_PRIVATE_KEY")
options = os.environ.get('VOTING_OPTIONS', '').split()
if not options:
raise Exception("You must provide a space-separated list of VOTING_OPTIONS")
port = int(os.environ.get('PORT', 9003))
# Number of tokens per IP. In other words, you can have this many people
# vote from the same IP for ever TOKEN_REFRESH_RATE seconds.
tokens_per_ip = int(os.environ.get('TOKENS_PER_IP', 4))
# This is the number of seconds after which a token for a particular IP
# can be used again.
token_refresh_rate = int(os.environ.get('TOKEN_REFRESH_RATE', 60))
# Number of votes that can be cast per voting token.
use_limit = len(options) / 2
# After a user gets a voting token, they have this many seconds to use it
# before it won't work anymore.
token_expiration = int(os.environ.get('TOKEN_EXPIRATION', 240))
engine = create_engine(url, reactor=reactor, strategy=TWISTED_STRATEGY)
store = SQLVoteStore(engine, options)
yield store.upgradeSchema()
captcha_verifier = RecaptchaVerifier(captcha_private)
dispenser = TimedTokenDispenser(
available=tokens_per_ip,
refresh=token_refresh_rate,
use_limit=use_limit,
expiration=token_expiration,
store=MemoryStore(reactor),
)
app = VoteCounter(store, dispenser, captcha_verifier, 'example.html')
site = Site(app.app.resource())
reactor.listenTCP(port, site)
yield defer.Deferred()
def test_useToken_uses(self):
"""
Tokens may only be used a certain number of times.
"""
d = TimedTokenDispenser(use_limit=3, store=MemoryStore(task.Clock()),
clock=task.Clock())
token = yield d.getToken('foo')
yield d.useToken(token)
yield d.useToken(token)
yield d.useToken(token)
yield self.assertFailure(d.useToken(token), InvalidToken)
def test_getToken_bypass(self):
"""
You can bypass the getToken available amount.
"""
clock = task.Clock()
d = TimedTokenDispenser(available=2, refresh=10,
store=MemoryStore(clock),
clock=clock)
yield d.getToken('foo')
clock.advance(5)
yield d.getToken('foo')
yield self.assertFailure(d.getToken('foo'), NoTokensLeft)
yield d.getToken('foo', check_available=False)