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"""
The main DebugToolbar class that loads and renders the Toolbar.
"""
from __future__ import unicode_literals
from django.conf import settings
from django.template.loader import render_to_string
from django.utils.datastructures import SortedDict
from django.utils.importlib import import_module
from debug_toolbar.utils.settings import CONFIG
class DebugToolbar(object):
def __init__(self, request):
self.request = request
self._panels = SortedDict()
base_url = self.request.META.get('SCRIPT_NAME', '')
self.config = {}
self.config.update(CONFIG)
self.template_context = {
'BASE_URL': base_url, # for backwards compatibility
'STATIC_URL': settings.STATIC_URL,
'TOOLBAR_ROOT_TAG_ATTRS': self.config['ROOT_TAG_ATTRS'],
}
self.load_panels()
self.stats = {}
def _get_panels(self):
return list(self._panels.values())
panels = property(_get_panels)
def get_panel(self, cls):
return self._panels[cls]
def load_panels(self):
"""
Populate debug panels
"""
global panel_classes
for panel_class in panel_classes:
panel_instance = panel_class(self, context=self.template_context)
self._panels[panel_class] = panel_instance
def render_toolbar(self):
"""
Renders the overall Toolbar with panels inside.
"""
context = self.template_context.copy()
context.update({
'panels': self.panels,
'toolbar_id': save_toolbar(self),
})
return render_to_string('debug_toolbar/base.html', context)
panel_classes = []
def load_panel_classes():
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
# Check if settings has a DEBUG_TOOLBAR_PANELS, otherwise use default
panels = getattr(settings, 'DEBUG_TOOLBAR_PANELS', (
'debug_toolbar.panels.version.VersionDebugPanel',
'debug_toolbar.panels.timer.TimerDebugPanel',
'debug_toolbar.panels.settings_vars.SettingsVarsDebugPanel',
'debug_toolbar.panels.headers.HeaderDebugPanel',
'debug_toolbar.panels.request_vars.RequestVarsDebugPanel',
'debug_toolbar.panels.sql.SQLDebugPanel',
'debug_toolbar.panels.template.TemplateDebugPanel',
'debug_toolbar.panels.cache.CacheDebugPanel',
'debug_toolbar.panels.signals.SignalDebugPanel',
'debug_toolbar.panels.logger.LoggingPanel',
))
for panel_path in panels:
try:
dot = panel_path.rindex('.')
except ValueError:
raise ImproperlyConfigured(
"%s isn't a debug panel module" % panel_path)
panel_module, panel_classname = panel_path[:dot], panel_path[dot + 1:]
try:
mod = import_module(panel_module)
except ImportError as e:
raise ImproperlyConfigured(
'Error importing debug panel %s: "%s"' %
(panel_module, e))
try:
panel_class = getattr(mod, panel_classname)
except AttributeError:
raise ImproperlyConfigured(
'Toolbar Panel module "%s" does not define a "%s" class' %
(panel_module, panel_classname))
panel_classes.append(panel_class)
toolbar_counter = 0
toolbar_results = SortedDict()
def save_toolbar(toolbar):
global toolbar_counter, toolbar_results
toolbar_counter += 1
toolbar_results[toolbar_counter] = toolbar
for _ in range(len(toolbar_results) - CONFIG['RESULTS_CACHE_SIZE']):
# When we drop support for Python 2.6 and switch to
# collections.OrderedDict, use popitem(last=False).
del toolbar_results[toolbar_results.keyOrder[0]]
return toolbar_counter
def get_saved_toolbar(toolbar_id):
return toolbar_results.get(toolbar_id)
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