def get_template(self, template_name):
tried = []
for template_file in self.iter_template_filenames(template_name):
try:
with io.open(template_file, encoding=settings.FILE_CHARSET) as fp:
template_code = fp.read()
except IOError as e:
if e.errno == errno.ENOENT:
tried.append((
Origin(template_file, template_name, self),
'Source does not exist',
))
continue
raise
return Template(template_code)
else:
raise TemplateDoesNotExist(template_name, tried=tried, backend=self)
python类TemplateDoesNotExist()的实例源码
def load_template_source(self, template_name, template_dirs=None):
"""
Loads templates from Python eggs via pkg_resource.resource_string.
For every installed app, it tries to get the resource (app, template_name).
"""
warnings.warn(
'The load_template_sources() method is deprecated. Use '
'get_template() or get_contents() instead.',
RemovedInDjango20Warning,
)
for origin in self.get_template_sources(template_name):
try:
return self.get_contents(origin), origin.name
except TemplateDoesNotExist:
pass
raise TemplateDoesNotExist(template_name)
def load_template(self, template_name, template_dirs=None):
warnings.warn(
'The load_template() method is deprecated. Use get_template() '
'instead.', RemovedInDjango20Warning,
)
source, display_name = self.load_template_source(
template_name, template_dirs,
)
origin = Origin(
name=display_name,
template_name=template_name,
loader=self,
)
try:
template = Template(source, origin, template_name, self.engine)
except TemplateDoesNotExist:
# If compiling the template we found raises TemplateDoesNotExist,
# back off to returning the source and display name for the
# template we were asked to load. This allows for correct
# identification of the actual template that does not exist.
return source, display_name
else:
return template, None
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 %}.
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 7231) 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)})
)
def directory_index(path, fullpath):
try:
t = loader.select_template([
'static/directory_index.html',
'static/directory_index',
])
except TemplateDoesNotExist:
t = Engine().from_string(DEFAULT_DIRECTORY_INDEX_TEMPLATE)
files = []
for f in os.listdir(fullpath):
if not f.startswith('.'):
if os.path.isdir(os.path.join(fullpath, f)):
f += '/'
files.append(f)
c = Context({
'directory': path + '/',
'file_list': files,
})
return HttpResponse(t.render(c))
def render(self, render_type, context):
"""
Renders the template
:param render_type: the content type to render
:param context: context data dictionary
:return: the rendered content
"""
assert render_type in self.render_types, 'Invalid Render Type'
try:
content = render_to_string('herald/{}/{}.{}'.format(
render_type,
self.template_name,
'txt' if render_type == 'text' else render_type
), context)
except TemplateDoesNotExist:
content = None
if settings.DEBUG:
raise
return content
def get_template_source(name, dirs=None):
"""Retrieves the template's source contents.
:param name: Template's filename, as passed to the template loader.
:param dirs: list of directories to optionally override the defaults.
:return: tuple including file contents and file path.
"""
loaders = []
for loader in Engine.get_default().template_loaders:
# The cached loader includes the actual loaders underneath
if hasattr(loader, 'loaders'):
loaders.extend(loader.loaders)
else:
loaders.append(loader)
for loader in loaders:
try:
return loader.load_template_source(name, template_dirs=dirs)
except TemplateDoesNotExist:
pass
raise TemplateDoesNotExist(name)
def page_not_found(request, template_name='404.html'):
context = {
'request_path': request.path,
'error': {
'title': _('Page not found'),
'message': _("We tried but couldn't find this page, sorry."),
},
}
try:
template = loader.get_template(template_name)
body = template.render(context, request)
content_type = None
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 HttpResponseNotFound(body, content_type=content_type)
def server_error(request, template_name='500.html'):
if request.is_ajax() or request.META.get('HTTP_ACCEPT', 'text/plain') == 'application/json':
return JsonResponse({
'sentry': sentry_id_from_request(request),
'error': {
'title': _('Something went wrong'),
}
}, status=500)
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
return HttpResponseServerError('<h1>Server Error (500)</h1>', content_type='text/html')
message = _('Something went wrong on our side... \n Please hold on while we fix it.').replace('\n', '<br>')
return HttpResponseServerError(template.render({
'sentry': sentry_id_from_request(request),
'error': {
'title': _('Something went wrong'),
'message': message,
'sentry': _('Fault code: #'),
}
}))
def add_message(self, request, level, message_template,
message_context=None, extra_tags=''):
"""
Wrapper of `django.contrib.messages.add_message`, that reads
the message text from a template.
"""
if 'django.contrib.messages' in settings.INSTALLED_APPS:
try:
if message_context is None:
message_context = {}
message = render_to_string(message_template,
message_context).strip()
if message:
messages.add_message(request, level, message,
extra_tags=extra_tags)
except TemplateDoesNotExist:
pass
def page_not_found(request, template_name='404.html'):
context = {
'request_path': request.path,
'error': {
'title': _('Page not found'),
'message': _("We tried but couldn't find this page, sorry."),
},
}
try:
template = loader.get_template(template_name)
body = template.render(context, request)
content_type = None
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 HttpResponseNotFound(body, content_type=content_type)
def server_error(request, template_name='500.html'):
if request.is_ajax() or request.META.get('HTTP_ACCEPT', 'text/plain') == 'application/json':
return JsonResponse({
'sentry': sentry_id_from_request(request),
'error': {
'title': _('Something went wrong'),
}
}, status=500)
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
return HttpResponseServerError('<h1>Server Error (500)</h1>', content_type='text/html')
message = _('Something went wrong on our side... \n Please hold on while we fix it.').replace('\n', '<br>')
return HttpResponseServerError(template.render({
'sentry': sentry_id_from_request(request),
'error': {
'title': _('Something went wrong'),
'message': message,
'sentry': _('Fault code: #'),
}
}))
def get_template(self, template_name):
tried = []
for template_file in self.iter_template_filenames(template_name):
try:
with io.open(template_file, encoding=settings.FILE_CHARSET) as fp:
template_code = fp.read()
except IOError as e:
if e.errno == errno.ENOENT:
tried.append((
Origin(template_file, template_name, self),
'Source does not exist',
))
continue
raise
return Template(template_code)
else:
raise TemplateDoesNotExist(template_name, tried=tried, backend=self)
def load_template_source(self, template_name, template_dirs=None):
"""
Loads templates from Python eggs via pkg_resource.resource_string.
For every installed app, it tries to get the resource (app, template_name).
"""
warnings.warn(
'The load_template_sources() method is deprecated. Use '
'get_template() or get_contents() instead.',
RemovedInDjango20Warning,
)
for origin in self.get_template_sources(template_name):
try:
return self.get_contents(origin), origin.name
except TemplateDoesNotExist:
pass
raise TemplateDoesNotExist(template_name)
def load_template(self, template_name, template_dirs=None):
warnings.warn(
'The load_template() method is deprecated. Use get_template() '
'instead.', RemovedInDjango20Warning,
)
source, display_name = self.load_template_source(
template_name, template_dirs,
)
origin = Origin(
name=display_name,
template_name=template_name,
loader=self,
)
try:
template = Template(source, origin, template_name, self.engine)
except TemplateDoesNotExist:
# If compiling the template we found raises TemplateDoesNotExist,
# back off to returning the source and display name for the
# template we were asked to load. This allows for correct
# identification of the actual template that does not exist.
return source, display_name
else:
return template, None
def bad_request(request, exception, template_name=ERROR_400_TEMPLATE_NAME):
"""
400 error handler.
Templates: :template:`400.html`
Context: None
"""
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
if template_name != ERROR_400_TEMPLATE_NAME:
# Reraise if it's a missing custom template.
raise
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 %}.
def permission_denied(request, exception, template_name=ERROR_403_TEMPLATE_NAME):
"""
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 7231) will be returned.
"""
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
if template_name != ERROR_403_TEMPLATE_NAME:
# Reraise if it's a missing custom template.
raise
return http.HttpResponseForbidden('<h1>403 Forbidden</h1>', content_type='text/html')
return http.HttpResponseForbidden(
template.render(request=request, context={'exception': force_text(exception)})
)
def directory_index(path, fullpath):
try:
t = loader.select_template([
'static/directory_index.html',
'static/directory_index',
])
except TemplateDoesNotExist:
t = Engine(libraries={'i18n': 'django.templatetags.i18n'}).from_string(DEFAULT_DIRECTORY_INDEX_TEMPLATE)
files = []
for f in os.listdir(fullpath):
if not f.startswith('.'):
if os.path.isdir(os.path.join(fullpath, f)):
f += '/'
files.append(f)
c = Context({
'directory': path + '/',
'file_list': files,
})
return HttpResponse(t.render(c))
def server_error(request, template_name=ERROR_500_TEMPLATE_NAME):
"""
500 error handler.
:template: :file:`500.html`
"""
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
if template_name != ERROR_500_TEMPLATE_NAME:
# Reraise if it's a missing custom template.
raise
return http.HttpResponseServerError('<h1>Server Error (500)</h1>', content_type='text/html')
return http.HttpResponseServerError(template.render(request=request))
# This can be called when CsrfViewMiddleware.process_view has not run,
# therefore need @requires_csrf_token in case the template needs
# {% csrf_token %}.
def permission_denied(request, exception, template_name=ERROR_403_TEMPLATE_NAME):
"""
Permission denied (403) handler.
:template: :file:`403.html`
If the template does not exist, an Http403 response containing the text
"403 Forbidden" (as per RFC 7231) will be returned.
"""
try:
template = loader.get_template(template_name)
except TemplateDoesNotExist:
if template_name != ERROR_403_TEMPLATE_NAME:
# Reraise if it's a missing custom template.
raise
return http.HttpResponseForbidden('<h1>403 Forbidden</h1>', content_type='text/html')
return http.HttpResponseForbidden(
template.render(request=request, context={'exception': force_text(exception)})
)
def get_nodelist(self, node, original, context):
if isinstance(node, ExtendsNode):
try:
if context is None:
context = Context()
context.template = original
return handle_extendsnode(node, context)
except template.TemplateSyntaxError as e:
raise TemplateSyntaxError(str(e))
except template.TemplateDoesNotExist as e:
raise TemplateDoesNotExist(str(e))
# Check if node is an ```if``` switch with true and false branches
nodelist = []
if isinstance(node, Node):
for attr in node.child_nodelists:
nodelist += getattr(node, attr, [])
else:
nodelist = getattr(node, 'nodelist', [])
return nodelist
def get_template(self, template_name):
tried = []
for template_file in self.iter_template_filenames(template_name):
try:
with io.open(template_file, encoding=settings.FILE_CHARSET) as fp:
template_code = fp.read()
except IOError as e:
if e.errno == errno.ENOENT:
tried.append((
Origin(template_file, template_name, self),
'Source does not exist',
))
continue
raise
return Template(template_code)
else:
raise TemplateDoesNotExist(template_name, tried=tried, backend=self)
def load_template_source(self, template_name, template_dirs=None):
"""
Loads templates from Python eggs via pkg_resource.resource_string.
For every installed app, it tries to get the resource (app, template_name).
"""
warnings.warn(
'The load_template_sources() method is deprecated. Use '
'get_template() or get_contents() instead.',
RemovedInDjango20Warning,
)
for origin in self.get_template_sources(template_name):
try:
return self.get_contents(origin), origin.name
except TemplateDoesNotExist:
pass
raise TemplateDoesNotExist(template_name)
def load_template(self, template_name, template_dirs=None):
warnings.warn(
'The load_template() method is deprecated. Use get_template() '
'instead.', RemovedInDjango20Warning,
)
source, display_name = self.load_template_source(
template_name, template_dirs,
)
origin = Origin(
name=display_name,
template_name=template_name,
loader=self,
)
try:
template = Template(source, origin, template_name, self.engine)
except TemplateDoesNotExist:
# If compiling the template we found raises TemplateDoesNotExist,
# back off to returning the source and display name for the
# template we were asked to load. This allows for correct
# identification of the actual template that does not exist.
return source, display_name
else:
return template, None
def load_template_source(self, template_name, template_dirs=None):
"""
Returns a tuple containing the source and origin for the given template
name.
Dispatch this to the underlying loaders.
"""
warnings.warn(
'The load_template_sources() method is deprecated. Use '
'get_template() or get_contents() instead.',
RemovedInDjango20Warning,
)
site = Site.objects.get_current()
label = settings.SITELABELS.label_from_site(site)
# put the prefixed template in front of the possible templates
names = [os.path.join(label, template_name), template_name]
for name in names: # always try to load the label-specific version first, independent from the loader
for loader in self.loaders:
try:
return loader.load_template_source(name, template_dirs=template_dirs)
except TemplateDoesNotExist:
pass
raise TemplateDoesNotExist("Tried %s" % ', '.join(names))
def get_template(self, template_name):
tried = []
for template_file in self.iter_template_filenames(template_name):
try:
with io.open(template_file, encoding=settings.FILE_CHARSET) as fp:
template_code = fp.read()
except IOError as e:
if e.errno == errno.ENOENT:
tried.append((
Origin(template_file, template_name, self),
'Source does not exist',
))
continue
raise
return Template(template_code)
else:
raise TemplateDoesNotExist(template_name, tried=tried, backend=self)
def load_template_source(self, template_name, template_dirs=None):
"""
Loads templates from Python eggs via pkg_resource.resource_string.
For every installed app, it tries to get the resource (app, template_name).
"""
warnings.warn(
'The load_template_sources() method is deprecated. Use '
'get_template() or get_contents() instead.',
RemovedInDjango20Warning,
)
for origin in self.get_template_sources(template_name):
try:
return self.get_contents(origin), origin.name
except TemplateDoesNotExist:
pass
raise TemplateDoesNotExist(template_name)
def load_template(self, template_name, template_dirs=None):
warnings.warn(
'The load_template() method is deprecated. Use get_template() '
'instead.', RemovedInDjango20Warning,
)
source, display_name = self.load_template_source(
template_name, template_dirs,
)
origin = Origin(
name=display_name,
template_name=template_name,
loader=self,
)
try:
template = Template(source, origin, template_name, self.engine)
except TemplateDoesNotExist:
# If compiling the template we found raises TemplateDoesNotExist,
# back off to returning the source and display name for the
# template we were asked to load. This allows for correct
# identification of the actual template that does not exist.
return source, display_name
else:
return template, None
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 %}.
