from __future__ import unicode_literals import re import sys import types from django.conf import settings from django.http import HttpResponse, HttpResponseNotFound from django.template import Context, Engine, TemplateDoesNotExist from django.template.defaultfilters import force_escape, pprint from django.urls import Resolver404, resolve from django.utils import lru_cache, six, timezone from django.utils.datastructures import MultiValueDict from django.utils.encoding import force_bytes, smart_text from django.utils.module_loading import import_string from django.utils.translation import ugettext as _ # Minimal Django templates engine to render the error templates # regardless of the project's TEMPLATES setting. DEBUG_ENGINE = Engine(debug=True) HIDDEN_SETTINGS = re.compile('API|TOKEN|KEY|SECRET|PASS|SIGNATURE') CLEANSED_SUBSTITUTE = '********************' class CallableSettingWrapper(object): """ Object to wrap callable appearing in settings * Not to call in the debug page (#21345). * Not to break the debug page if the callable forbidding to set attributes (#23070). """ def __init__(self, callable_setting): self._wrapped = callable_setting def __repr__(self): return repr(self._wrapped) def cleanse_setting(key, value): """Cleanse an individual setting key/value of sensitive content. If the value is a dictionary, recursively cleanse the keys in that dictionary. """ try: if HIDDEN_SETTINGS.search(key): cleansed = CLEANSED_SUBSTITUTE else: if isinstance(value, dict): cleansed = {k: cleanse_setting(k, v) for k, v in value.items()} else: cleansed = value except TypeError: # If the key isn't regex-able, just return as-is. cleansed = value if callable(cleansed): # For fixing #21345 and #23070 cleansed = CallableSettingWrapper(cleansed) return cleansed def get_safe_settings(): "Returns a dictionary of the settings module, with sensitive settings blurred out." settings_dict = {} for k in dir(settings): if k.isupper(): settings_dict[k] = cleanse_setting(k, getattr(settings, k)) return settings_dict def technical_500_response(request, exc_type, exc_value, tb, status_code=500): """ Create a technical server error response. The last three arguments are the values returned from sys.exc_info() and friends. """ reporter = ExceptionReporter(request, exc_type, exc_value, tb) if request.is_ajax(): text = reporter.get_traceback_text() return HttpResponse(text, status=status_code, content_type='text/plain') else: html = reporter.get_traceback_html() return HttpResponse(html, status=status_code, content_type='text/html') @lru_cache.lru_cache() def get_default_exception_reporter_filter(): # Instantiate the default filter for the first time and cache it. return import_string(settings.DEFAULT_EXCEPTION_REPORTER_FILTER)() def get_exception_reporter_filter(request): default_filter = get_default_exception_reporter_filter() return getattr(request, 'exception_reporter_filter', default_filter) class ExceptionReporterFilter(object): """ Base for all exception reporter filter classes. All overridable hooks contain lenient default behaviors. """ def get_post_parameters(self, request): if request is None: return {} else: return request.POST def get_traceback_frame_variables(self, request, tb_frame): return list(tb_frame.f_locals.items()) class SafeExceptionReporterFilter(ExceptionReporterFilter): """ Use annotations made by the sensitive_post_parameters and sensitive_variables decorators to filter out sensitive information. """ def is_active(self, request): """ This filter is to add safety in production environments (i.e. DEBUG is False). If DEBUG is True then your site is not safe anyway. This hook is provided as a convenience to easily activate or deactivate the filter on a per request basis. """ return settings.DEBUG is False def get_cleansed_multivaluedict(self, request, multivaluedict): """ Replaces the keys in a MultiValueDict marked as sensitive with stars. This mitigates leaking sensitive POST parameters if something like request.POST['nonexistent_key'] throws an exception (#21098). """ sensitive_post_parameters = getattr(request, 'sensitive_post_parameters', []) if self.is_active(request) and sensitive_post_parameters: multivaluedict = multivaluedict.copy() for param in sensitive_post_parameters: if param in multivaluedict: multivaluedict[param] = CLEANSED_SUBSTITUTE return multivaluedict def get_post_parameters(self, request): """ Replaces the values of POST parameters marked as sensitive with stars (*********). """ if request is None: return {} else: sensitive_post_parameters = getattr(request, 'sensitive_post_parameters', []) if self.is_active(request) and sensitive_post_parameters: cleansed = request.POST.copy() if sensitive_post_parameters == '__ALL__': # Cleanse all parameters. for k, v in cleansed.items(): cleansed[k] = CLEANSED_SUBSTITUTE return cleansed else: # Cleanse only the specified parameters. for param in sensitive_post_parameters: if param in cleansed: cleansed[param] = CLEANSED_SUBSTITUTE return cleansed else: return request.POST def cleanse_special_types(self, request, value): try: # If value is lazy or a complex object of another kind, this check # might raise an exception. isinstance checks that lazy # MultiValueDicts will have a return value. is_multivalue_dict = isinstance(value, MultiValueDict) except Exception as e: return '{!r} while evaluating {!r}'.format(e, value) if is_multivalue_dict: # Cleanse MultiValueDicts (request.POST is the one we usually care about) value = self.get_cleansed_multivaluedict(request, value) return value def get_traceback_frame_variables(self, request, tb_frame): """ Replaces the values of variables marked as sensitive with stars (*********). """ # Loop through the frame's callers to see if the sensitive_variables # decorator was used. current_frame = tb_frame.f_back sensitive_variables = None while current_frame is not None: if (current_frame.f_code.co_name == 'sensitive_variables_wrapper' and 'sensitive_variables_wrapper' in current_frame.f_locals): # The sensitive_variables decorator was used, so we take note # of the sensitive variables' names. wrapper = current_frame.f_locals['sensitive_variables_wrapper'] sensitive_variables = getattr(wrapper, 'sensitive_variables', None) break current_frame = current_frame.f_back cleansed = {} if self.is_active(request) and sensitive_variables: if sensitive_variables == '__ALL__': # Cleanse all variables for name, value in tb_frame.f_locals.items(): cleansed[name] = CLEANSED_SUBSTITUTE else: # Cleanse specified variables for name, value in tb_frame.f_locals.items(): if name in sensitive_variables: value = CLEANSED_SUBSTITUTE else: value = self.cleanse_special_types(request, value) cleansed[name] = value else: # Potentially cleanse the request and any MultiValueDicts if they # are one of the frame variables. for name, value in tb_frame.f_locals.items(): cleansed[name] = self.cleanse_special_types(request, value) if (tb_frame.f_code.co_name == 'sensitive_variables_wrapper' and 'sensitive_variables_wrapper' in tb_frame.f_locals): # For good measure, obfuscate the decorated function's arguments in # the sensitive_variables decorator's frame, in case the variables # associated with those arguments were meant to be obfuscated from # the decorated function's frame. cleansed['func_args'] = CLEANSED_SUBSTITUTE cleansed['func_kwargs'] = CLEANSED_SUBSTITUTE return cleansed.items() class ExceptionReporter(object): """ A class to organize and coordinate reporting on exceptions. """ def __init__(self, request, exc_type, exc_value, tb, is_email=False): self.request = request self.filter = get_exception_reporter_filter(self.request) self.exc_type = exc_type self.exc_value = exc_value self.tb = tb self.is_email = is_email self.template_info = getattr(self.exc_value, 'template_debug', None) self.template_does_not_exist = False self.postmortem = None # Handle deprecated string exceptions if isinstance(self.exc_type, six.string_types): self.exc_value = Exception('Deprecated String Exception: %r' % self.exc_type) self.exc_type = type(self.exc_value) def get_traceback_data(self): """Return a dictionary containing traceback information.""" if self.exc_type and issubclass(self.exc_type, TemplateDoesNotExist): self.template_does_not_exist = True self.postmortem = self.exc_value.chain or [self.exc_value] frames = self.get_traceback_frames() for i, frame in enumerate(frames): if 'vars' in frame: frame_vars = [] for k, v in frame['vars']: v = pprint(v) # The force_escape filter assume unicode, make sure that works if isinstance(v, six.binary_type): v = v.decode('utf-8', 'replace') # don't choke on non-utf-8 input # Trim large blobs of data if len(v) > 4096: v = '%s... ' % (v[0:4096], len(v)) frame_vars.append((k, force_escape(v))) frame['vars'] = frame_vars frames[i] = frame unicode_hint = '' if self.exc_type and issubclass(self.exc_type, UnicodeError): start = getattr(self.exc_value, 'start', None) end = getattr(self.exc_value, 'end', None) if start is not None and end is not None: unicode_str = self.exc_value.args[1] unicode_hint = smart_text( unicode_str[max(start - 5, 0):min(end + 5, len(unicode_str))], 'ascii', errors='replace' ) from django import get_version c = { 'is_email': self.is_email, 'unicode_hint': unicode_hint, 'frames': frames, 'request': self.request, 'filtered_POST': self.filter.get_post_parameters(self.request), 'settings': get_safe_settings(), 'sys_executable': sys.executable, 'sys_version_info': '%d.%d.%d' % sys.version_info[0:3], 'server_time': timezone.now(), 'django_version_info': get_version(), 'sys_path': sys.path, 'template_info': self.template_info, 'template_does_not_exist': self.template_does_not_exist, 'postmortem': self.postmortem, } # Check whether exception info is available if self.exc_type: c['exception_type'] = self.exc_type.__name__ if self.exc_value: c['exception_value'] = smart_text(self.exc_value, errors='replace') if frames: c['lastframe'] = frames[-1] return c def get_traceback_html(self): "Return HTML version of debug 500 HTTP error page." t = DEBUG_ENGINE.from_string(TECHNICAL_500_TEMPLATE) c = Context(self.get_traceback_data(), use_l10n=False) return t.render(c) def get_traceback_text(self): "Return plain text version of debug 500 HTTP error page." t = DEBUG_ENGINE.from_string(TECHNICAL_500_TEXT_TEMPLATE) c = Context(self.get_traceback_data(), autoescape=False, use_l10n=False) return t.render(c) def _get_lines_from_file(self, filename, lineno, context_lines, loader=None, module_name=None): """ Returns context_lines before and after lineno from file. Returns (pre_context_lineno, pre_context, context_line, post_context). """ source = None if loader is not None and hasattr(loader, "get_source"): try: source = loader.get_source(module_name) except ImportError: pass if source is not None: source = source.splitlines() if source is None: try: with open(filename, 'rb') as fp: source = fp.read().splitlines() except (OSError, IOError): pass if source is None: return None, [], None, [] # If we just read the source from a file, or if the loader did not # apply tokenize.detect_encoding to decode the source into a Unicode # string, then we should do that ourselves. if isinstance(source[0], six.binary_type): encoding = 'ascii' for line in source[:2]: # File coding may be specified. Match pattern from PEP-263 # (http://www.python.org/dev/peps/pep-0263/) match = re.search(br'coding[:=]\s*([-\w.]+)', line) if match: encoding = match.group(1).decode('ascii') break source = [six.text_type(sline, encoding, 'replace') for sline in source] lower_bound = max(0, lineno - context_lines) upper_bound = lineno + context_lines pre_context = source[lower_bound:lineno] context_line = source[lineno] post_context = source[lineno + 1:upper_bound] return lower_bound, pre_context, context_line, post_context def get_traceback_frames(self): def explicit_or_implicit_cause(exc_value): explicit = getattr(exc_value, '__cause__', None) implicit = getattr(exc_value, '__context__', None) return explicit or implicit # Get the exception and all its causes exceptions = [] exc_value = self.exc_value while exc_value: exceptions.append(exc_value) exc_value = explicit_or_implicit_cause(exc_value) frames = [] # No exceptions were supplied to ExceptionReporter if not exceptions: return frames # In case there's just one exception (always in Python 2, # sometimes in Python 3), take the traceback from self.tb (Python 2 # doesn't have a __traceback__ attribute on Exception) exc_value = exceptions.pop() tb = self.tb if six.PY2 or not exceptions else exc_value.__traceback__ while tb is not None: # Support for __traceback_hide__ which is used by a few libraries # to hide internal frames. if tb.tb_frame.f_locals.get('__traceback_hide__'): tb = tb.tb_next continue filename = tb.tb_frame.f_code.co_filename function = tb.tb_frame.f_code.co_name lineno = tb.tb_lineno - 1 loader = tb.tb_frame.f_globals.get('__loader__') module_name = tb.tb_frame.f_globals.get('__name__') or '' pre_context_lineno, pre_context, context_line, post_context = self._get_lines_from_file( filename, lineno, 7, loader, module_name, ) if pre_context_lineno is not None: frames.append({ 'exc_cause': explicit_or_implicit_cause(exc_value), 'exc_cause_explicit': getattr(exc_value, '__cause__', True), 'tb': tb, 'type': 'django' if module_name.startswith('django.') else 'user', 'filename': filename, 'function': function, 'lineno': lineno + 1, 'vars': self.filter.get_traceback_frame_variables(self.request, tb.tb_frame), 'id': id(tb), 'pre_context': pre_context, 'context_line': context_line, 'post_context': post_context, 'pre_context_lineno': pre_context_lineno + 1, }) # If the traceback for current exception is consumed, try the # other exception. if six.PY2: tb = tb.tb_next elif not tb.tb_next and exceptions: exc_value = exceptions.pop() tb = exc_value.__traceback__ else: tb = tb.tb_next return frames def format_exception(self): """ Return the same data as from traceback.format_exception. """ import traceback frames = self.get_traceback_frames() tb = [(f['filename'], f['lineno'], f['function'], f['context_line']) for f in frames] list = ['Traceback (most recent call last):\n'] list += traceback.format_list(tb) list += traceback.format_exception_only(self.exc_type, self.exc_value) return list def technical_404_response(request, exception): "Create a technical 404 error response. The exception should be the Http404." try: error_url = exception.args[0]['path'] except (IndexError, TypeError, KeyError): error_url = request.path_info[1:] # Trim leading slash try: tried = exception.args[0]['tried'] except (IndexError, TypeError, KeyError): tried = [] else: if (not tried # empty URLconf or (request.path == '/' and len(tried) == 1 # default URLconf and len(tried[0]) == 1 and getattr(tried[0][0], 'app_name', '') == getattr(tried[0][0], 'namespace', '') == 'admin')): return default_urlconf(request) urlconf = getattr(request, 'urlconf', settings.ROOT_URLCONF) if isinstance(urlconf, types.ModuleType): urlconf = urlconf.__name__ caller = '' try: resolver_match = resolve(request.path) except Resolver404: pass else: obj = resolver_match.func if hasattr(obj, '__name__'): caller = obj.__name__ elif hasattr(obj, '__class__') and hasattr(obj.__class__, '__name__'): caller = obj.__class__.__name__ if hasattr(obj, '__module__'): module = obj.__module__ caller = '%s.%s' % (module, caller) t = DEBUG_ENGINE.from_string(TECHNICAL_404_TEMPLATE) c = Context({ 'urlconf': urlconf, 'root_urlconf': settings.ROOT_URLCONF, 'request_path': error_url, 'urlpatterns': tried, 'reason': force_bytes(exception, errors='replace'), 'request': request, 'settings': get_safe_settings(), 'raising_view_name': caller, }) return HttpResponseNotFound(t.render(c), content_type='text/html') def default_urlconf(request): "Create an empty URLconf 404 error response." t = DEBUG_ENGINE.from_string(DEFAULT_URLCONF_TEMPLATE) c = Context({ "title": _("Welcome to Django"), "heading": _("It worked!"), "subheading": _("Congratulations on your first Django-powered page."), "instructions": _("Of course, you haven't actually done any work yet. " "Next, start your first app by running python manage.py startapp [app_label]."), "explanation": _("You're seeing this message because you have DEBUG = True in your " "Django settings file and you haven't configured any URLs. Get to work!"), }) return HttpResponse(t.render(c), content_type='text/html') # # Templates are embedded in the file so that we know the error handler will # always work even if the template loader is broken. # TECHNICAL_500_TEMPLATE = (""" {% if exception_type %}{{ exception_type }}{% else %}Report{% endif %}""" """{% if request %} at {{ request.path_info|escape }}{% endif %} {% if not is_email %} {% endif %}

{% if exception_type %}{{ exception_type }}{% else %}Report{% endif %}""" """{% if request %} at {{ request.path_info|escape }}{% endif %}

"""
 """{% if exception_value %}{{ exception_value|force_escape }}{% else %}No exception message supplied{% endif %}"""
"""
{% if request %} {% endif %} {% if exception_type %} {% endif %} {% if exception_type and exception_value %} {% endif %} {% if lastframe %} {% endif %}
Request Method: {{ request.META.REQUEST_METHOD }}
Request URL: {{ request.get_raw_uri|escape }}
Django Version: {{ django_version_info }}
Exception Type: {{ exception_type }}
Exception Value:
{{ exception_value|force_escape }}
Exception Location: {{ lastframe.filename|escape }} in {{ lastframe.function|escape }}, line {{ lastframe.lineno }}
Python Executable: {{ sys_executable|escape }}
Python Version: {{ sys_version_info }}
Python Path:
{{ sys_path|pprint }}
Server time: {{server_time|date:"r"}}
{% if unicode_hint %}

Unicode error hint

The string that could not be encoded/decoded was: {{ unicode_hint|force_escape }}

{% endif %} {% if template_does_not_exist %}

Template-loader postmortem

{% if postmortem %}

Django tried loading these templates, in this order:

{% for entry in postmortem %}

Using engine {{ entry.backend.name }}:

{% else %}
  • This engine did not provide a list of tried templates.
  • {% endif %} {% endfor %} {% else %}

    No templates were found because your 'TEMPLATES' setting is not configured.

    {% endif %}
    {% endif %} {% if template_info %}

    Error during template rendering

    In template {{ template_info.name }}, error at line {{ template_info.line }}

    {{ template_info.message }}

    {% for source_line in template_info.source_lines %} {% if source_line.0 == template_info.line %} {% else %} {% endif %} {% endfor %}
    {{ source_line.0 }} {{ template_info.before }}""" """{{ template_info.during }}""" """{{ template_info.after }}
    {{ source_line.0 }} {{ source_line.1 }}
    {% endif %} {% if frames %}

    Traceback {% if not is_email %} Switch to copy-and-paste view{% endif %}

    {% autoescape off %}
      {% for frame in frames %} {% ifchanged frame.exc_cause %}{% if frame.exc_cause %}
    • {% if frame.exc_cause_explicit %} The above exception ({{ frame.exc_cause }}) was the direct cause of the following exception: {% else %} During handling of the above exception ({{ frame.exc_cause }}), another exception occurred: {% endif %}

    • {% endif %}{% endifchanged %}
    • {{ frame.filename|escape }} in {{ frame.function|escape }} {% if frame.context_line %}
      {% if frame.pre_context and not is_email %}
        {% for line in frame.pre_context %}
      1. {{ line|escape }}
      2. {% endfor %}
      {% endif %}
      1. """            """{{ frame.context_line|escape }}
        {% if not is_email %} ...{% endif %}
      {% if frame.post_context and not is_email %}
        {% for line in frame.post_context %}
      1. {{ line|escape }}
      2. {% endfor %}
      {% endif %}
      {% endif %} {% if frame.vars %}
      {% if is_email %}

      Local Vars

      {% else %} Local vars {% endif %}
      {% for var in frame.vars|dictsort:"0" %} {% endfor %}
      Variable Value
      {{ var.0|force_escape }}
      {{ var.1 }}
      {% endif %}
    • {% endfor %}
    {% endautoescape %}
    {% if not is_email %}


    {% endif %} {% endif %}

    Request information

    {% if request %} {% if request.user %}

    USER

    {{ request.user }}

    {% endif %}

    GET

    {% if request.GET %} {% for var in request.GET.items %} {% endfor %}
    Variable Value
    {{ var.0 }}
    {{ var.1|pprint }}
    {% else %}

    No GET data

    {% endif %}

    POST

    {% if filtered_POST %} {% for var in filtered_POST.items %} {% endfor %}
    Variable Value
    {{ var.0 }}
    {{ var.1|pprint }}
    {% else %}

    No POST data

    {% endif %}

    FILES

    {% if request.FILES %} {% for var in request.FILES.items %} {% endfor %}
    Variable Value
    {{ var.0 }}
    {{ var.1|pprint }}
    {% else %}

    No FILES data

    {% endif %} {% if request.COOKIES %} {% for var in request.COOKIES.items %} {% endfor %}
    Variable Value
    {{ var.0 }}
    {{ var.1|pprint }}
    {% else %}

    No cookie data

    {% endif %}

    META

    {% for var in request.META.items|dictsort:"0" %} {% endfor %}
    Variable Value
    {{ var.0 }}
    {{ var.1|pprint }}
    {% else %}

    Request data not supplied

    {% endif %}

    Settings

    Using settings module {{ settings.SETTINGS_MODULE }}

    {% for var in settings.items|dictsort:"0" %} {% endfor %}
    Setting Value
    {{ var.0 }}
    {{ var.1|pprint }}
    {% if not is_email %}

    You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard page generated by the handler for this status code.

    {% endif %} """) TECHNICAL_500_TEXT_TEMPLATE = ("""""" """{% firstof exception_type 'Report' %}{% if request %} at {{ request.path_info }}{% endif %} {% firstof exception_value 'No exception message supplied' %} {% if request %} Request Method: {{ request.META.REQUEST_METHOD }} Request URL: {{ request.get_raw_uri }}{% endif %} Django Version: {{ django_version_info }} Python Executable: {{ sys_executable }} Python Version: {{ sys_version_info }} Python Path: {{ sys_path }} Server time: {{server_time|date:"r"}} Installed Applications: {{ settings.INSTALLED_APPS|pprint }} Installed Middleware: {{ settings.MIDDLEWARE_CLASSES|pprint }} {% if template_does_not_exist %}Template loader postmortem {% if postmortem %}Django tried loading these templates, in this order: {% for entry in postmortem %} Using engine {{ entry.backend.name }}: {% if entry.tried %}{% for attempt in entry.tried %}""" """ * {{ attempt.0.loader_name }}: {{ attempt.0.name }} ({{ attempt.1 }}) {% endfor %}{% else %} This engine did not provide a list of tried templates. {% endif %}{% endfor %} {% else %}No templates were found because your 'TEMPLATES' setting is not configured. {% endif %} {% endif %}{% if template_info %} Template error: In template {{ template_info.name }}, error at line {{ template_info.line }} {{ template_info.message }} {% for source_line in template_info.source_lines %}""" "{% if source_line.0 == template_info.line %}" " {{ source_line.0 }} : {{ template_info.before }} {{ template_info.during }} {{ template_info.after }}" "{% else %}" " {{ source_line.0 }} : {{ source_line.1 }}" """{% endif %}{% endfor %}{% endif %}{% if frames %} Traceback:""" "{% for frame in frames %}" "{% ifchanged frame.exc_cause %}" " {% if frame.exc_cause %}" """ {% if frame.exc_cause_explicit %} The above exception ({{ frame.exc_cause }}) was the direct cause of the following exception: {% else %} During handling of the above exception ({{ frame.exc_cause }}), another exception occurred: {% endif %} {% endif %} {% endifchanged %} File "{{ frame.filename }}" in {{ frame.function }} {% if frame.context_line %} {{ frame.lineno }}. {{ frame.context_line }}{% endif %} {% endfor %} {% if exception_type %}Exception Type: {{ exception_type }}{% if request %} at {{ request.path_info }}{% endif %} {% if exception_value %}Exception Value: {{ exception_value }}{% endif %}{% endif %}{% endif %} {% if request %}Request information: {% if request.user %}USER: {{ request.user }}{% endif %} GET:{% for k, v in request.GET.items %} {{ k }} = {{ v|stringformat:"r" }}{% empty %} No GET data{% endfor %} POST:{% for k, v in filtered_POST.items %} {{ k }} = {{ v|stringformat:"r" }}{% empty %} No POST data{% endfor %} FILES:{% for k, v in request.FILES.items %} {{ k }} = {{ v|stringformat:"r" }}{% empty %} No FILES data{% endfor %} COOKIES:{% for k, v in request.COOKIES.items %} {{ k }} = {{ v|stringformat:"r" }}{% empty %} No cookie data{% endfor %} META:{% for k, v in request.META.items|dictsort:"0" %} {{ k }} = {{ v|stringformat:"r" }}{% endfor %} {% else %}Request data not supplied {% endif %} Settings: Using settings module {{ settings.SETTINGS_MODULE }}{% for k, v in settings.items|dictsort:"0" %} {{ k }} = {{ v|stringformat:"r" }}{% endfor %} {% if not is_email %} You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard page generated by the handler for this status code. {% endif %} """) TECHNICAL_404_TEMPLATE = """ Page not found at {{ request.path_info|escape }}

    Page not found (404)

    {% if raising_view_name %} {% endif %}
    Request Method: {{ request.META.REQUEST_METHOD }}
    Request URL: {{ request.build_absolute_uri|escape }}
    Raised by: {{ raising_view_name }}
    {% if urlpatterns %}

    Using the URLconf defined in {{ urlconf }}, Django tried these URL patterns, in this order:

      {% for pattern in urlpatterns %}
    1. {% for pat in pattern %} {{ pat.regex.pattern }} {% if forloop.last and pat.name %}[name='{{ pat.name }}']{% endif %} {% endfor %}
    2. {% endfor %}

    The current URL, {{ request_path|escape }}, didn't match any of these.

    {% else %}

    {{ reason }}

    {% endif %}

    You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.

    """ DEFAULT_URLCONF_TEMPLATE = """ {{ title }}

    {{ heading }}

    {{ subheading }}

    {{ instructions|safe }}

    {{ explanation|safe }}

    """