discourse/config/initializers/200-first_middlewares.rb

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# frozen_string_literal: true
# we want MesageBus to be close to the front
# this is important cause the vast majority of web requests go to it
# this allows us to avoid full middleware crawls each time
#
# We aren't manipulating the middleware stack directly because of
# https://github.com/rails/rails/pull/27936
Rails.configuration.middleware.unshift(MessageBus::Rack::Middleware)
# no reason to track this in development, that is 300+ redis calls saved per
# page view (we serve all assets out of thin in development)
if Rails.env != 'development' || ENV['TRACK_REQUESTS']
require 'middleware/request_tracker'
Rails.configuration.middleware.unshift Middleware::RequestTracker
if GlobalSetting.enable_performance_http_headers
MethodProfiler.ensure_discourse_instrumentation!
end
end
if Rails.configuration.multisite
# Multisite needs to be first, because the request tracker and message bus rely on it
Rails.configuration.middleware.unshift RailsMultisite::Middleware, RailsMultisite::DiscoursePatches.config
Rails.configuration.middleware.delete ActionDispatch::Executor
if defined?(RailsFailover::ActiveRecord) && Rails.configuration.active_record_rails_failover
Rails.configuration.middleware.insert_after(RailsMultisite::Middleware, RailsFailover::ActiveRecord::Middleware)
end
elsif defined?(RailsFailover::ActiveRecord) && Rails.configuration.active_record_rails_failover
Rails.configuration.middleware.insert_before(MessageBus::Rack::Middleware, RailsFailover::ActiveRecord::Middleware)
end