52 lines
1.3 KiB
Ruby
52 lines
1.3 KiB
Ruby
|
# frozen_string_literal: true
|
||
|
|
|
||
|
|
class RateLimiter::Redis < RateLimiter
|
||
|
|
def get_global(name, ip)
|
||
|
|
r = Cache.redis.get(global_key(name, ip))
|
||
|
|
return r.to_i unless r.nil?
|
||
|
|
nil
|
||
|
|
end
|
||
|
|
|
||
|
|
def get_route(name, domain, path, ip)
|
||
|
|
r = Cache.redis.get(route_key(name, domain, path, ip))
|
||
|
|
return r.to_i unless r.nil?
|
||
|
|
nil
|
||
|
|
end
|
||
|
|
|
||
|
|
def get_global_ttl(name, ip)
|
||
|
|
r = Cache.redis.pttl(global_key(name, ip))
|
||
|
|
return nil if r.nil? || r < 0
|
||
|
|
r
|
||
|
|
end
|
||
|
|
|
||
|
|
def get_route_ttl(name, domain, path, ip)
|
||
|
|
r = Cache.redis.pttl(route_key(name, domain, path, ip))
|
||
|
|
return nil if r.nil? || r < 0
|
||
|
|
r
|
||
|
|
end
|
||
|
|
|
||
|
|
def consume_global(name, window, limit, ip)
|
||
|
|
consume(global_key(name, ip), window, limit)
|
||
|
|
end
|
||
|
|
|
||
|
|
def consume_route(name, domain, path, window, limit, ip)
|
||
|
|
consume(route_key(name, domain, path, ip), window, limit)
|
||
|
|
end
|
||
|
|
|
||
|
|
def fix_infinite_expiry(key, _val, expiry)
|
||
|
|
Cache.redis.pexpire(key, expiry) if expiry.to_i == -1
|
||
|
|
end
|
||
|
|
|
||
|
|
private
|
||
|
|
|
||
|
|
def consume(key, window, limit)
|
||
|
|
exists = Cache.redis.exists(key) == 1
|
||
|
|
Cache.redis.set(key, "0", px: window) unless exists
|
||
|
|
val = Cache.redis.get(key).to_i
|
||
|
|
exp = Cache.redis.pttl(key)
|
||
|
|
fix_infinite_expiry(key, val, exp)
|
||
|
|
# don't increase if the request will be rejected
|
||
|
|
val > limit ? limit + 1 : Cache.redis.incr(key)
|
||
|
|
end
|
||
|
|
end
|