107 lines
2.6 KiB
Ruby
107 lines
2.6 KiB
Ruby
# frozen_string_literal: true
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require 'ruby-prof'
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require 'memory_profiler'
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module Gitlab
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module RequestProfiler
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class Middleware
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def initialize(app)
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@app = app
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end
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def call(env)
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if profile?(env)
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call_with_profiling(env)
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else
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@app.call(env)
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end
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end
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def profile?(env)
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header_token = env['HTTP_X_PROFILE_TOKEN']
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return unless header_token.present?
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profile_token = Gitlab::RequestProfiler.profile_token
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return unless profile_token.present?
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header_token == profile_token
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end
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def call_with_profiling(env)
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case env['HTTP_X_PROFILE_MODE']
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when 'execution', nil
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call_with_call_stack_profiling(env)
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when 'memory'
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call_with_memory_profiling(env)
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else
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raise ActionController::BadRequest, invalid_profile_mode(env)
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end
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end
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def invalid_profile_mode(env)
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<<~HEREDOC
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Invalid X-Profile-Mode: #{env['HTTP_X_PROFILE_MODE']}.
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Supported profile mode request header:
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- X-Profile-Mode: execution
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- X-Profile-Mode: memory
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HEREDOC
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end
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def call_with_call_stack_profiling(env)
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ret = nil
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report = RubyProf::Profile.profile do
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ret = catch(:warden) do # rubocop:disable Cop/BanCatchThrow
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@app.call(env)
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end
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end
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generate_report(env, 'execution', 'html') do |file|
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printer = RubyProf::CallStackPrinter.new(report)
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printer.print(file)
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end
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handle_request_ret(ret)
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end
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def call_with_memory_profiling(env)
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ret = nil
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report = MemoryProfiler.report do
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ret = catch(:warden) do # rubocop:disable Cop/BanCatchThrow
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@app.call(env)
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end
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end
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generate_report(env, 'memory', 'txt') do |file|
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report.pretty_print(to_file: file)
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end
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handle_request_ret(ret)
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end
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def generate_report(env, report_type, extension)
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file_name = "#{env['PATH_INFO'].tr('/', '|')}_#{Time.current.to_i}"\
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"_#{report_type}.#{extension}"
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file_path = "#{PROFILES_DIR}/#{file_name}"
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FileUtils.mkdir_p(PROFILES_DIR)
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begin
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File.open(file_path, 'wb') do |file|
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yield(file)
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end
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rescue
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FileUtils.rm(file_path)
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end
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end
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def handle_request_ret(ret)
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if ret.is_a?(Array)
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ret
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else
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throw(:warden, ret) # rubocop:disable Cop/BanCatchThrow
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end
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end
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end
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end
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end
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