text: """
  Debug Toolbar middleware
  """
  import imp
  import thread
  
  from django.conf import settings
  from django.http import HttpResponseRedirect
  from django.shortcuts import render_to_response
  from django.utils.encoding import smart_unicode
  from django.utils.importlib import import_module
  
  import debug_toolbar.urls
  from debug_toolbar.toolbar.loader import DebugToolbar
  
  _HTML_TYPES = ('text/html', 'application/xhtml+xml')
  
  
  def replace_insensitive(string, target, replacement):
      """
      Similar to string.replace() but is case insensitive
      Code borrowed from: http://forums.devshed.com/python-programming-11/case-insensitive-string-replace-490921.html
      """
      no_case = string.lower()
      index = no_case.rfind(target.lower())
      if index >= 0:
          return string[:index] + replacement + string[index + len(target):]
      else:  # no results so return the original string
          return string
  
  
  class DebugToolbarMiddleware(object):
      """
      Middleware to set up Debug Toolbar on incoming request and render toolbar
      on outgoing response.
      """
      debug_toolbars = {}
  
      @classmethod
      def get_current(cls):
          return cls.debug_toolbars.get(thread.get_ident())
  
      def __init__(self):
          self._urlconfs = {}
  
          # Set method to use to decide to show toolbar
          self.show_toolbar = self._show_toolbar  # default
  
          # The tag to attach the toolbar to
          self.tag = u'</body>'
  
          if hasattr(settings, 'DEBUG_TOOLBAR_CONFIG'):
              show_toolbar_callback = settings.DEBUG_TOOLBAR_CONFIG.get(
                  'SHOW_TOOLBAR_CALLBACK', None)
              if show_toolbar_callback:
                  self.show_toolbar = show_toolbar_callback
  
              tag = settings.DEBUG_TOOLBAR_CONFIG.get('TAG', None)
              if tag:
                  self.tag = u'</' + tag + u'>'
  
      def _show_toolbar(self, request):
          if getattr(settings, 'TEST', False):
              return False
  
          x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR', None)
          if x_forwarded_for:
              remote_addr = x_forwarded_for.split(',')[0].strip()
          else:
              remote_addr = request.META.get('REMOTE_ADDR', None)
  
          # if not internal ip, and not DEBUG
          return remote_addr in settings.INTERNAL_IPS and bool(settings.DEBUG)
  
      def process_request(self, request):
          __traceback_hide__ = True
          if self.show_toolbar(request):
              urlconf = getattr(request, 'urlconf', settings.ROOT_URLCONF)
              if isinstance(urlconf, basestring):
                  urlconf = import_module(getattr(request, 'urlconf', settings.ROOT_URLCONF))
  
              if urlconf not in self._urlconfs:
                  new_urlconf = imp.new_module('urlconf')
                  new_urlconf.urlpatterns = debug_toolbar.urls.urlpatterns + \
                          list(urlconf.urlpatterns)
  
                  if hasattr(urlconf, 'handler403'):
                      new_urlconf.handler403 = urlconf.handler403
                  if hasattr(urlconf, 'handler404'):
                      new_urlconf.handler404 = urlconf.handler404
                  if hasattr(urlconf, 'handler500'):
                      new_urlconf.handler500 = urlconf.handler500
  
                  self._urlconfs[urlconf] = new_urlconf
  
              request.urlconf = self._urlconfs[urlconf]
  
              toolbar = DebugToolbar(request)
              for panel in toolbar.panels:
                  panel.process_request(request)
              self.__class__.debug_toolbars[thread.get_ident()] = toolbar
  
      def process_view(self, request, view_func, view_args, view_kwargs):
          __traceback_hide__ = True
          toolbar = self.__class__.debug_toolbars.get(thread.get_ident())
          if not toolbar:
              return
          result = None
          for panel in toolbar.panels:
              response = panel.process_view(request, view_func, view_args, view_kwargs)
              if response:
                  result = response
          return result
  
      def process_response(self, request, response):
          __traceback_hide__ = True
          ident = thread.get_ident()
          toolbar = self.__class__.debug_toolbars.get(ident)
          if not toolbar or request.is_ajax():
              return response
          if isinstance(response, HttpResponseRedirect):
              if not toolbar.config['INTERCEPT_REDIRECTS'] or request.is_ajax():
                  return response
              redirect_to = response.get('Location', None)
              if redirect_to:
                  cookies = response.cookies
                  response = render_to_response(
                      'debug_toolbar/redirect.html',
                      {'redirect_to': redirect_to}
                  )
                  response.cookies = cookies
          if ('gzip' not in response.get('Content-Encoding', '') and
                  response.get('Content-Type', '').split(';')[0] in _HTML_TYPES):
              for panel in toolbar.panels:
                  panel.process_response(request, response)
              response.content = replace_insensitive(
                  smart_unicode(response.content),
                  self.tag,
                  smart_unicode(toolbar.render_toolbar() + self.tag))
              if response.get('Content-Length', None):
                  response['Content-Length'] = len(response.content)
          del self.__class__.debug_toolbars[ident]
          return response
  