Class: RailsInstrument::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_instrument.rb

Overview

:nodoc:

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/rails_instrument.rb', line 39

def initialize(app, options = {})
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rails_instrument.rb', line 43

def call(env)
  RailsInstrument.reset!
  status, headers, body = @app.call(env)
  begin
    headers["X-View-Runtime"] = (view_runtime / 1000).to_s
    headers["X-DB-Runtime"] = (db_runtime / 1000).to_s
    headers["X-DB-Query-Count"] = sql_count.to_s

    if html_reponse?(headers)
      new_body = Rack::Response.new([], status, headers)
      body.each do |fragment|
        new_body.write fragment.gsub("</body>", "#{sql_html_overlay}</body>")
      end
      body = new_body
    end
  rescue => e
    headers["X-Rails-Instrument"] = "Error"
  end

  [status, headers, body]
end