Class: WebConsole::Middleware

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

Constant Summary collapse

TEMPLATES_PATH = 
File.expand_path('../templates', __FILE__)
@@mount_point = 
'/__web_console'
@@whiny_requests = 
true

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware 



13
14
15
 
# File 'lib/web_console/middleware.rb', line 13

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
 
# File 'lib/web_console/middleware.rb', line 17

def call(env)
  app_exception = catch :app_exception do
    request = create_regular_or_whiny_request(env)
    return call_app(env) unless request.from_whitelisted_ip?

    if id = id_for_repl_session_update(request)
      return update_repl_session(id, request)
    elsif id = id_for_repl_session_stack_frame_change(request)
      return change_stack_trace(id, request)
    end

    status, headers, body = call_app(env)

    if session = Session.from(Thread.current) and acceptable_content_type?(headers)
      response = Response.new(body, status, headers)
      template = Template.new(env, session)

      response.headers["X-Web-Console-Session-Id"] = session.id
      response.headers["X-Web-Console-Mount-Point"] = mount_point
      response.write(template.render('index'))
      response.finish
    else
      [ status, headers, body ]
    end
  end
rescue => e
  WebConsole.logger.error("\n#{e.class}: #{e}\n\tfrom #{e.backtrace.join("\n\tfrom ")}")
  raise e
ensure
  # Clean up the fiber locals after the session creation. Object#console
  # uses those to communicate the current binding or exception to the middleware.
  Thread.current[:__web_console_exception] = nil
  Thread.current[:__web_console_binding] = nil

  raise app_exception if Exception === app_exception
end