Class: ScoutApm::Instruments::HTTP

Inherits:
Object
  • Object
show all
Defined in:
lib/scout_apm/instruments/http.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context) ⇒ HTTP

Returns a new instance of HTTP.



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# File 'lib/scout_apm/instruments/http.rb', line 6

def initialize(context)
  @context = context
  @installed = false
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/scout_apm/instruments/http.rb', line 4

def context
  @context
end

Instance Method Details

#install(prepend:) ⇒ Object 



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# File 'lib/scout_apm/instruments/http.rb', line 19

def install(prepend:)
  if defined?(::HTTP) && defined?(::HTTP::Client)
    @installed = true

    logger.info "Instrumenting HTTP::Client. Prepend: #{prepend}"

    if prepend
      ::HTTP::Client.send(:include, ScoutApm::Tracer)
      if http_version_at_least?("6.0.0")
        ::HTTP::Client.send(:prepend, HTTPInstrumentationPrependV6)
      else
        ::HTTP::Client.send(:prepend, HTTPInstrumentationPrepend)
      end
    else
      if http_version_at_least?("6.0.0")
        ::HTTP::Client.class_eval do
          include ScoutApm::Tracer

          def request_with_scout_instruments(verb, uri, **opts)
            self.class.instrument("HTTP", verb, :ignore_children => true, :desc => request_scout_description(verb, uri)) do
              request_without_scout_instruments(verb, uri, **opts)
            end
          end

          def request_scout_description(verb, uri)
            max_length = ScoutApm::Agent.instance.context.config.value('instrument_http_url_length')
            (String(uri).split('?').first)[0..(max_length - 1)]
          rescue
            ""
          end

          alias request_without_scout_instruments request
          alias request request_with_scout_instruments
        end
      else
        ::HTTP::Client.class_eval do
          include ScoutApm::Tracer

          def request_with_scout_instruments(verb, uri, opts = {})
            self.class.instrument("HTTP", verb, :ignore_children => true, :desc => request_scout_description(verb, uri)) do
              request_without_scout_instruments(verb, uri, opts)
            end
          end

          def request_scout_description(verb, uri)
            max_length = ScoutApm::Agent.instance.context.config.value('instrument_http_url_length')
            (String(uri).split('?').first)[0..(max_length - 1)]
          rescue
            ""
          end

          alias request_without_scout_instruments request
          alias request request_with_scout_instruments
        end
      end
    end
  end
end

#installed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/scout_apm/instruments/http.rb', line 15

def installed?
  @installed
end

#logger ⇒ Object 



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# File 'lib/scout_apm/instruments/http.rb', line 11

def logger
  context.logger
end