Class: Goliath::Rack::Tracer

Inherits:

Object

• Object
• Goliath::Rack::Tracer

show all

Defined in:

lib/goliath/rack/tracer.rb

Overview

use Goliath::Rack::Tracer

Instance Method Summary (collapse)

• - (Object) call(env)
• - (Tracer) initialize(app) constructor

  A new instance of Tracer.

• - (Object) post_process(env, status, headers, body)

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# File 'lib/goliath/rack/tracer.rb', line 9

def initialize(app)
  @app = app
end

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# File 'lib/goliath/rack/tracer.rb', line 13

def call(env)
  async_cb = env['async.callback']

  env['async.callback'] = Proc.new do |status, headers, body|
    async_cb.call(post_process(env, status, headers, body))
    env.logger.info env.trace_stats.collect{|s| s.join(':')}.join(', ')
  end

  status, headers, body = @app.call(env)
  post_process(env, status, headers, body)
end

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# File 'lib/goliath/rack/tracer.rb', line 25

def post_process(env, status, headers, body)
  extra = { 'X-PostRank' => env.trace_stats.collect{|s| s.join(': ')}.join(', ')}
  [status, headers.merge(extra), body]
end