class RorVsWild::Plugin::Middleware
Public Class Methods
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# File lib/rorvswild/plugin/middleware.rb, line 55 def initialize(app, config) @app, @config = app, config end
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# File lib/rorvswild/plugin/middleware.rb, line 49 def self.setup return if @installed Rails.application.config.middleware.unshift(RorVsWild::Plugin::Middleware, nil) if defined?(Rails) @installed = true end
Public Instance Methods
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# File lib/rorvswild/plugin/middleware.rb, line 59 def call(env) queue_time_ms = calculate_queue_time(env) RorVsWild.agent.start_request(queue_time_ms || 0) RorVsWild.agent.current_data[:path] = env["ORIGINAL_FULLPATH"] add_queue_time_section(queue_time_ms) section = RorVsWild::Section.start section.file, section.line = rails_engine_location section.commands << "Rails::Engine#call" code, headers, body = @app.call(env) [code, headers, body] ensure RorVsWild::Section.stop inject_server_timing(RorVsWild.agent.stop_request, headers) end
Private Instance Methods
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# File lib/rorvswild/plugin/middleware.rb, line 76 def add_queue_time_section(queue_time_ms) return unless queue_time_ms section = Section.new section.stop section.total_ms = queue_time_ms section.gc_time_ms = 0 section.file = "request-queue" section.line = 0 section.kind = "queue" RorVsWild.agent.add_section(section) end
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# File lib/rorvswild/plugin/middleware.rb, line 89 def calculate_queue_time(env) queue_time_from_header = parse_queue_time_header(env) ((Time.now.to_f - queue_time_from_header) * 1000).round if queue_time_from_header end
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# File lib/rorvswild/plugin/middleware.rb, line 109 def format_server_timing_ascii(sections, total_width = 80) max_time = sections.map(&:self_ms).max chart_width = (total_width * 0.25).to_i rows = sections.map { |section| [ section.kind == "view" ? section.file : "#{section.file}:#{section.line}", "█" * (section.self_ms * (chart_width-1) / max_time), "%.1fms" % section.self_ms, ] } time_width = rows.map { |cols| cols[2].size }.max + 1 label_width = total_width - chart_width - time_width rows.each { |cols| cols[0] = truncate_backwards(cols[0], label_width) } template = "%-#{label_width}s%#{chart_width}s%#{time_width}s" rows.map { |cols| format(template, *cols) }.join("\n") end
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# File lib/rorvswild/plugin/middleware.rb, line 99 def format_server_timing_header(sections) sections.map do |section| if section.kind == "view" "#{section.kind};dur=#{section.self_ms.round};desc=\"#{section.file}\"" else "#{section.kind};dur=#{section.self_ms.round};desc=\"#{section.file}:#{section.line}\"" end end.join(", ") end
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# File lib/rorvswild/plugin/middleware.rb, line 130 def inject_server_timing(data, headers) return if !data || !data[:send_server_timing] || !(sections = data[:sections]) sections = sections.sort_by(&:self_ms).reverse[0,10] headers["Server-Timing"] = format_server_timing_header(sections) if data[:name] && RorVsWild.logger.level <= Logger::Severity::DEBUG RorVsWild.logger.debug(["┤ #{data[:name]} ├".center(80, "─"), format_server_timing_ascii(sections), "─" * 80, nil].join("\n") ) end end
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# File lib/rorvswild/plugin/middleware.rb, line 95 def rails_engine_location @rails_engine_location = ::Rails::Engine.instance_method(:call).source_location end
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# File lib/rorvswild/plugin/middleware.rb, line 126 def truncate_backwards(string, width) string.size > width ? "…" + string[-(width - 1)..-1] : string end