Class: LevoRailsmiddleware::Middleware

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

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Returns a new instance of Middleware.



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# File 'lib/levo_rails_middleware/middleware.rb', line 5

def initialize(app)
  @app = app
  @sender = Sender.new(LevoRailsmiddleware.configuration.remote_url)
rescue => e
  LevoRailsmiddleware.log_exception("initializing middleware", e)
  @initialization_failed = true
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/levo_rails_middleware/middleware.rb', line 13

def call(env)
  # Skip processing if initialization failed or middleware is disabled
  return @app.call(env) if @initialization_failed || !LevoRailsmiddleware.configuration.enabled
  
  # Skip excluded paths
  path = env['PATH_INFO'] || ""
  return @app.call(env) if should_skip?(path)
  
  # Skip based on sampling rate
  return @app.call(env) if rand > LevoRailsmiddleware.configuration.sampling_rate
  
  start_time = Time.now
  
  # Preserve the original request body
  request_body = env['rack.input'].read
  env['rack.input'].rewind
  
  # Process the request through the app
  status, headers, body = @app.call(env)
  end_time = Time.now
  
  # Calculate the request duration
  duration_ms = ((end_time.to_f - start_time.to_f) * 1000).round
  
  # Save the original input stream
  saved_input = env['rack.input']
  env['rack.input'] = StringIO.new(request_body)
  
  # Create the request/response entry and send it
  begin
    entry = Entry.new(start_time, duration_ms, env, status, headers, body)
    @sender.send_async(entry)
  rescue => e
    LevoRailsmiddleware.log_exception("processing request", e)
  ensure
    # Restore the original input stream
    env['rack.input'] = saved_input
  end
  
  [status, headers, body]
rescue => e
  LevoRailsmiddleware.log_exception("middleware execution", e)
  @app.call(env)  # Ensure we still call the app even if our middleware fails
end