django1/django/views/defaults.py

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from django import http
from django.template import (Context, RequestContext,
loader, Template, TemplateDoesNotExist)
from django.views.decorators.csrf import requires_csrf_token
# This can be called when CsrfViewMiddleware.process_view has not run,
# therefore need @requires_csrf_token in case the template needs
# {% csrf_token %}.
@requires_csrf_token
def page_not_found(request, template_name='404.html'):
"""
Default 404 handler.
Templates: :template:`404.html`
Context:
request_path
The path of the requested URL (e.g., '/app/pages/bad_page/')
"""
try:
template = loader.get_template(template_name)
content_type = None # Django will use DEFAULT_CONTENT_TYPE
except TemplateDoesNotExist:
template = Template(
'<h1>Not Found</h1>'
'<p>The requested URL {{ request_path }} was not found on this server.</p>')
content_type = 'text/html'
body = template.render(RequestContext(request, {'request_path': request.path}))
return http.HttpResponseNotFound(body, content_type=content_type)
@requires_csrf_token
def server_error(request, template_name='500.html'):
"""
500 error handler.
Templates: :template:`500.html`
Context: None
"""
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
return http.HttpResponseServerError('<h1>Server Error (500)</h1>', content_type='text/html')
return http.HttpResponseServerError(template.render(Context({})))
@requires_csrf_token
def bad_request(request, template_name='400.html'):
"""
400 error handler.
Templates: :template:`400.html`
Context: None
"""
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
return http.HttpResponseBadRequest('<h1>Bad Request (400)</h1>', content_type='text/html')
return http.HttpResponseBadRequest(template.render(Context({})))
# This can be called when CsrfViewMiddleware.process_view has not run,
# therefore need @requires_csrf_token in case the template needs
# {% csrf_token %}.
@requires_csrf_token
def permission_denied(request, template_name='403.html'):
"""
Permission denied (403) handler.
Templates: :template:`403.html`
Context: None
If the template does not exist, an Http403 response containing the text
"403 Forbidden" (as per RFC 2616) will be returned.
"""
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
return http.HttpResponseForbidden('<h1>403 Forbidden</h1>', content_type='text/html')
return http.HttpResponseForbidden(template.render(RequestContext(request)))