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"""
Debug Toolbar middleware
"""
import re
from django.conf import settings
from django.http import HttpResponseRedirect
from django.shortcuts import render_to_response
from django.utils.encoding import smart_str
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')
_END_HEAD_RE = re.compile(r'</head>', re.IGNORECASE)
_START_BODY_RE = re.compile(r'<body([^<]*)>', re.IGNORECASE)
_END_BODY_RE = re.compile(r'</body>', re.IGNORECASE)
class DebugToolbarMiddleware(object):
"""
Middleware to set up Debug Toolbar on incoming request and render toolbar
on outgoing response.
"""
def __init__(self):
self.debug_toolbar = None
self.original_urlconf = settings.ROOT_URLCONF
self.original_pattern = patterns('', ('', include(self.original_urlconf)),)
self.override_url = True
def show_toolbar(self, request):
if not settings.DEBUG:
return False
if request.is_ajax():
return False
if not request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
return False
return True
def process_request(self, request):
if self.override_url:
debug_toolbar.urls.urlpatterns += self.original_pattern
self.override_url = False
request.urlconf = 'debug_toolbar.urls'
if self.show_toolbar(request):
self.debug_toolbar = DebugToolbar(request)
for panel in self.debug_toolbar.panels:
panel.process_request(request)
return None
def process_view(self, request, view_func, view_args, view_kwargs):
if self.debug_toolbar:
for panel in self.debug_toolbar.panels:
panel.process_view(request, view_func, view_args, view_kwargs)
def process_response(self, request, response):
if not self.debug_toolbar:
return response
if self.debug_toolbar.config['INTERCEPT_REDIRECTS']:
if isinstance(response, HttpResponseRedirect):
redirect_to = response.get('Location', None)
if redirect_to:
response = render_to_response(
'debug_toolbar/redirect.html',
{'redirect_to': redirect_to}
)
if response.status_code != 200:
return response
for panel in self.debug_toolbar.panels:
panel.process_response(request, response)
if response['Content-Type'].split(';')[0] in _HTML_TYPES:
# Saving this here in case we ever need to inject into <head>
#response.content = _END_HEAD_RE.sub(smart_str(self.debug_toolbar.render_styles() + "%s" % match.group()), response.content)
response.content = _START_BODY_RE.sub(smart_str('<body\\1>' + self.debug_toolbar.render_toolbar()), response.content)
response.content = _END_BODY_RE.sub(smart_str('<script src="' + request.META.get('SCRIPT_NAME', '') + '/__debug__/m/toolbar.js" type="text/javascript" charset="utf-8"></script></body>'), response.content)
return response
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