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# frozen_string_literal: true
require 'ruby-prof'
module Gitlab
module RequestProfiler
class Middleware
def initialize(app)
@app = app
end
def call(env)
if profile?(env)
call_with_profiling(env)
else
@app.call(env)
end
end
def profile?(env)
header_token = env['HTTP_X_PROFILE_TOKEN']
return unless header_token.present?
profile_token = Gitlab::RequestProfiler.profile_token
return unless profile_token.present?
header_token == profile_token
end
def call_with_profiling(env)
ret = nil
result = RubyProf::Profile.profile do
ret = catch(:warden) do
@app.call(env)
end
end
printer = RubyProf::CallStackPrinter.new(result)
file_name = "#{env['PATH_INFO'].tr('/', '|')}_#{Time.current.to_i}.html"
file_path = "#{PROFILES_DIR}/#{file_name}"
FileUtils.mkdir_p(PROFILES_DIR)
File.open(file_path, 'wb') do |file|
printer.print(file)
end
if ret.is_a?(Array)
ret
else
throw(:warden, ret)
end
end
end
end
end
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