debian-mirror-gitlab/lib/gitlab/metrics/rack_middleware.rb

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# frozen_string_literal: true
module Gitlab
module Metrics
# Rack middleware for tracking Rails and Grape requests.
class RackMiddleware
def initialize(app)
@app = app
end
# env - A Hash containing Rack environment details.
def call(env)
trans = transaction_from_env(env)
retval = nil
begin
retval = trans.run { @app.call(env) }
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rescue Exception => error # rubocop: disable Lint/RescueException
trans.add_event(:rails_exception)
raise error
# Even in the event of an error we want to submit any metrics we
# might've gathered up to this point.
ensure
trans.finish
end
retval
end
def transaction_from_env(env)
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trans = WebTransaction.new(env)
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trans.set(:request_uri, filtered_path(env), false)
trans.set(:request_method, env['REQUEST_METHOD'], false)
trans
end
private
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def filtered_path(env)
ActionDispatch::Request.new(env).filtered_path.presence || env['REQUEST_URI']
end
end
end
end