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90 lines
2.1 KiB
90 lines
2.1 KiB
require 'ruby-prof'
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require 'stringio'
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require 'carto/configuration'
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module CartoDB
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# A profiler based on https://github.com/justinweiss/request_profiler/
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class Profiler
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include Carto::Configuration
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def initialize(printer: nil, exclude: nil)
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@printer = printer || ::RubyProf::CallTreePrinter
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@exclusions = exclude
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end
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def call(request, response)
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mode = profile_mode(request)
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::RubyProf.measure_mode = mode
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::RubyProf.start
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begin
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yield
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ensure
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result = ::RubyProf.stop
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write_result(result, request, response)
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end
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end
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def profile_mode(request)
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mode_string = request.params["profile_request"]
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if mode_string
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if mode_string.downcase == "true" or mode_string == "1"
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::RubyProf::PROCESS_TIME
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else
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::RubyProf.const_get(mode_string.upcase)
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end
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end
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end
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def format(printer)
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case printer
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when ::RubyProf::FlatPrinter
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'txt'
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when ::RubyProf::FlatPrinterWithLineNumbers
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'txt'
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when ::RubyProf::GraphPrinter
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'txt'
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when ::RubyProf::GraphHtmlPrinter
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'html'
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when ::RubyProf::DotPrinter
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'dot'
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when ::RubyProf::CallTreePrinter
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"out.#{Process.pid}"
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when ::RubyProf::CallStackPrinter
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'html'
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else
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'txt'
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end
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end
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def prefix(printer)
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case printer
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when ::RubyProf::CallTreePrinter
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"callgrind."
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else
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""
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end
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end
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def write_result(result, request, response)
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result.eliminate_methods!(@exclusions) if @exclusions
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printer = @printer.new(result)
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url = request.fullpath.gsub(/[?\/]/, '-')
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filename = "#{prefix(printer)}#{Time.now.strftime('%Y-%m-%d-%H-%M-%S')}-#{url.slice(0, 50)}.#{format(printer)}"
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in_mem_file = ""
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::StringIO.open(in_mem_file, 'w+') do |f|
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printer.print(f)
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end
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response.body = in_mem_file
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response.status = 200
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response.content_type = 'text/plain'
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response.headers['Content-Disposition'] = "attachment; filename=\"#{filename}\""
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end
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end
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end
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