65 lines
2.2 KiB
Ruby
65 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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module Rack
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class Attack
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Rack::Attack.cache.store = ActiveSupport::Cache::MemoryStore.new
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# Throttle all requests by IP (60rpm)
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#
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# Key: "rack::attack:#{Time.now.to_i/:period}:req/ip:#{req.ip}"
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# throttle('req/ip', :limit => 300, :period => 5.minutes) do |req|
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# req.ip # unless req.path.start_with?('/assets')
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# end
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# Throttle POST requests to /login by IP address
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#
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# Key: "rack::attack:#{Time.now.to_i/:period}:logins/ip:#{req.ip}"
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throttle('logins/ip', limit: 5, period: 20.seconds) do |req|
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req.ip if req.path == '/login' && req.post?
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end
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# Throttle POST requests to /login by email param
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#
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# Key: "rack::attack:#{Time.now.to_i/:period}:logins/email:#{req.email}"
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#
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# Note: This creates a problem where a malicious user could intentionally
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# throttle logins for another user and force their login requests to be
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# denied, but that's not very common and shouldn't happen to you. (Knock
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# on wood!)
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throttle('logins/email', limit: 5, period: 20.seconds) do |req|
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if req.path == '/login' && req.post?
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# return the email if present, nil otherwise
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req.params['email'].presence
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end
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end
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throttle('load_url_title/req/5mins/ip', limit: 300, period: 5.minutes) do |req|
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req.ip if req.path == 'hacks/load_url_title'
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end
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throttle('load_url_title/req/1s/ip', limit: 5, period: 1.second) do |req|
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# If the return value is truthy, the cache key for the return value
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# is incremented and compared with the limit. In this case:
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# "rack::attack:#{Time.now.to_i/1.second}:load_url_title/req/ip:#{req.ip}"
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#
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# If falsy, the cache key is neither incremented nor checked.
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req.ip if req.path == 'hacks/load_url_title'
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end
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self.throttled_response = lambda do |env|
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now = Time.zone.now
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match_data = env['rack.attack.match_data']
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period = match_data[:period]
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limit = match_data[:limit]
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headers = {
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'X-RateLimit-Limit' => limit.to_s,
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'X-RateLimit-Remaining' => '0',
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'X-RateLimit-Reset' => (now + (period - now.to_i % period)).to_s
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}
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[429, headers, ['']]
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end
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end
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end
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