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Check whether to ratelimit sooner to avoid work

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This commit is contained in:
Erik Johnston 2016-10-19 10:45:24 +01:00
parent 50ac1d843d
commit 550308c7a1
2 changed files with 22 additions and 6 deletions
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14
synapse/api/ratelimiting.py
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@ -23,7 +23,7 @@ class Ratelimiter(object):
def __init__(self):
self.message_counts = collections.OrderedDict()
def send_message(self, user_id, time_now_s, msg_rate_hz, burst_count):
def send_message(self, user_id, time_now_s, msg_rate_hz, burst_count, update=True):
"""Can the user send a message?
Args:
user_id: The user sending a message.
@ -32,12 +32,15 @@ class Ratelimiter(object):
second.
burst_count: How many messages the user can send before being
limited.
update (bool): Whether to update the message rates or not. This is
useful to check if a message would be allowed to be sent before
its ready to be actually sent.
Returns:
A pair of a bool indicating if they can send a message now and a
time in seconds of when they can next send a message.
"""
self.prune_message_counts(time_now_s)
message_count, time_start, _ignored = self.message_counts.pop(
message_count, time_start, _ignored = self.message_counts.get(
user_id, (0., time_now_s, None),
)
time_delta = time_now_s - time_start
@ -52,9 +55,10 @@ class Ratelimiter(object):
allowed = True
message_count += 1
self.message_counts[user_id] = (
message_count, time_start, msg_rate_hz
)
if update:
self.message_counts[user_id] = (
message_count, time_start, msg_rate_hz
)
if msg_rate_hz > 0:
time_allowed = (