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"""
Debug Toolbar middleware
"""
import os
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.conf.urls.defaults import include, patterns
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.
"""
def __init__(self):
self.debug_toolbars = {}
self.override_url = True
# 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):
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 remote_addr in settings.INTERNAL_IPS \
or (request.is_ajax() and \
not debug_toolbar.urls._PREFIX in request.path) \
or not settings.DEBUG:
return False
return True
def process_request(self, request):
if self.show_toolbar(request):
if self.override_url:
original_urlconf = __import__(getattr(request, 'urlconf', settings.ROOT_URLCONF), {}, {}, ['*'])
debug_toolbar.urls.urlpatterns += patterns('',
('', include(original_urlconf)),
)
if hasattr(original_urlconf, 'handler404'):
debug_toolbar.urls.handler404 = original_urlconf.handler404
if hasattr(original_urlconf, 'handler500'):
debug_toolbar.urls.handler500 = original_urlconf.handler500
self.override_url = False
request.urlconf = 'debug_toolbar.urls'
self.debug_toolbars[request] = DebugToolbar(request)
for panel in self.debug_toolbars[request].panels:
panel.process_request(request)
def process_view(self, request, view_func, view_args, view_kwargs):
if request in self.debug_toolbars:
for panel in self.debug_toolbars[request].panels:
panel.process_view(request, view_func, view_args, view_kwargs)
def process_response(self, request, response):
if request not in self.debug_toolbars:
return response
if self.debug_toolbars[request].config['INTERCEPT_REDIRECTS']:
if isinstance(response, HttpResponseRedirect):
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 response.status_code == 200 and 'gzip' not in response.get('Content-Encoding', ''):
if response['Content-Type'].split(';')[0] in _HTML_TYPES:
for panel in self.debug_toolbars[request].panels:
panel.process_response(request, response)
response.content = replace_insensitive(
smart_unicode(response.content),
self.tag,
smart_unicode(self.debug_toolbars[request].render_toolbar() + self.tag))
if response.get('Content-Length', None):
response['Content-Length'] = len(response.content)
del self.debug_toolbars[request]
return response
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