1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
from django import http
from django.template import Context, Engine, TemplateDoesNotExist, loader
from django.utils import six
from django.utils.encoding import force_text
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, exception, 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/')
exception
The message from the exception which triggered the 404 (if one was
supplied), or the exception class name
"""
exception_repr = exception.__class__.__name__
# Try to get an "interesting" exception message, if any (and not the ugly
# Resolver404 dictionary)
try:
message = exception.args[0]
except (AttributeError, IndexError):
pass
else:
if isinstance(message, six.text_type):
exception_repr = message
context = {
'request_path': request.path,
'exception': exception_repr,
}
try:
template = loader.get_template(template_name)
body = template.render(context, request)
content_type = None # Django will use DEFAULT_CONTENT_TYPE
except TemplateDoesNotExist:
template = Engine().from_string(
'<h1>Not Found</h1>'
'<p>The requested URL {{ request_path }} was not found on this server.</p>')
body = template.render(Context(context))
content_type = 'text/html'
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())
@requires_csrf_token
def bad_request(request, exception, 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')
# No exception content is passed to the template, to not disclose any sensitive information.
return http.HttpResponseBadRequest(template.render())
# 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, exception, 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(request=request, context={'exception': force_text(exception)})
)
|