Class: Immunio::HTTPTracker

Inherits:
Object
  • Object
show all
Defined in:
lib/immunio/plugins/http_tracker.rb

Overview

Rack middleware tracking HTTP requests and responses and triggers the proper hooks.

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ HTTPTracker

Returns a new instance of HTTPTracker.



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# File 'lib/immunio/plugins/http_tracker.rb', line 9

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/immunio/plugins/http_tracker.rb', line 13

def call(env)
  request = Request.new(env)
  request.time "plugin", "#{Module.nesting[0]}::#{__method__}" do
    Immunio.logger.debug { "Creating new request in HTTPTracker" }
    Immunio.new_request(request)

    Immunio.run_hook! "http_tracker", "http_request_start", meta_from_env(env)

    env['rack.input'] = InputWrapper.new(env['rack.input'])

    status, headers, body = Request.pause "plugin", "#{Module.nesting[0]}::#{__method__}" do
      @app.call(env)
    end

    # Run hook for the session only if it was loaded
    session = env["rack.session"]
    if session_was_loaded?(session)
      Immunio.run_hook! "http_tracker", "framework_session",
                        session_id: extract_session_id(session)
    end

    # Immunio expects response headers as a list of tuples.
    list_headers = headers_to_list(headers)

    result = Immunio.run_hook! "http_tracker", "http_response_start",
                               status: status, headers: list_headers

    # If new headers are specified, convert them back to the Ruby hash format.
    if result["headers"] != nil
      # The new_headers completely replace the originals.
      headers = list_to_headers(result["headers"].to_a)
    end

    # Send the response
    [status, headers, body]
  end

rescue RequestBlocked
  Request.time "plugin", "#{Module.nesting[0]}::#{__method__}[RequestBlocked]" do
    status, headers, body = Immunio.blocked_app.call(env)
    # Do not allow blocking the request here
    Immunio.run_hook "http_tracker", "http_response_start",
                     status: status, headers: headers

    [status, headers, body]
  end
rescue OverrideResponse => override
  status, headers, body = Immunio.override_response.call(env, override)

  Immunio.run_hook "http_tracker", "http_response_start",
                   status: status, headers: headers
  [status, headers, body]
end