Merge pull request #2183 from matrix-org/luke/username-availability

Implement username availability checker
This commit is contained in:
Luke Barnard 2017-05-04 09:58:40 +01:00 committed by GitHub
commit 6aa423a1a8

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@ -31,6 +31,7 @@ import logging
import hmac
from hashlib import sha1
from synapse.util.async import run_on_reactor
from synapse.util.ratelimitutils import FederationRateLimiter
# We ought to be using hmac.compare_digest() but on older pythons it doesn't
@ -115,6 +116,45 @@ class MsisdnRegisterRequestTokenRestServlet(RestServlet):
defer.returnValue((200, ret))
class UsernameAvailabilityRestServlet(RestServlet):
PATTERNS = client_v2_patterns("/register/available")
def __init__(self, hs):
"""
Args:
hs (synapse.server.HomeServer): server
"""
super(UsernameAvailabilityRestServlet, self).__init__()
self.hs = hs
self.registration_handler = hs.get_handlers().registration_handler
self.ratelimiter = FederationRateLimiter(
hs.get_clock(),
# Time window of 2s
window_size=2000,
# Artificially delay requests if rate > sleep_limit/window_size
sleep_limit=1,
# Amount of artificial delay to apply
sleep_msec=1000,
# Error with 429 if more than reject_limit requests are queued
reject_limit=1,
# Allow 1 request at a time
concurrent_requests=1,
)
@defer.inlineCallbacks
def on_GET(self, request):
ip = self.hs.get_ip_from_request(request)
with self.ratelimiter.ratelimit(ip) as wait_deferred:
yield wait_deferred
body = parse_json_object_from_request(request)
assert_params_in_request(body, ['username'])
yield self.registration_handler.check_username(body['username'])
defer.returnValue((200, {"available": True}))
class RegisterRestServlet(RestServlet):
PATTERNS = client_v2_patterns("/register$")
@ -555,4 +595,5 @@ class RegisterRestServlet(RestServlet):
def register_servlets(hs, http_server):
EmailRegisterRequestTokenRestServlet(hs).register(http_server)
MsisdnRegisterRequestTokenRestServlet(hs).register(http_server)
UsernameAvailabilityRestServlet(hs).register(http_server)
RegisterRestServlet(hs).register(http_server)