graingert/http.py

## http.py
#encoding: UTF-8

from django.conf import settings
from django.core.exceptions import ViewDoesNotExist
from django.http import HttpResponse
from django.template import RequestContext,Template,loader,TemplateDoesNotExist
from django.utils.importlib import import_module
import httplib

class HttpException(Exception):
	""" Exception for Http Errors"""
	def __init__(self, message, status=500):
		self.status = status
		super(HttpException, self).__init__(message)

class HttpExceptionMiddleware(object):
	"""
	Replace Status code raises for a {{status}}.html rendered template
	"""
	def process_exception(self, request, exception):
		"""
		Render a {{status}}.html template or a hardcoded html as status page, but only if
		exception is instance of HttpException class
		"""
		# we need to import to use isinstance
		from http import HttpException
		if not isinstance(exception,HttpException):
			# Return None make that django reraise exception:
			# http://docs.djangoproject.com/en/dev/topics/http/middleware/#process_exception
			return None

		print exception.status

		try:
			# Handle import error but allow any type error from view
			callback = getattr(import_module(settings.ROOT_URLCONF),'handler' + str(exception.status))
			return callback(request,exception)
		except (ImportError,AttributeError),e:
			# doesn't exist a handler{{status}}, try get template
			try:
				t = loader.get_template(str(exception.status) + '.html')
			except TemplateDoesNotExist:
				# doesn't exist a template in path, use hardcoded template
				t = Template("""
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
   "http://www.w3.org/TR/html4/strict.dtd">
<HTML>
  <HEAD>
    <TITLE>
    {% if message %}
		{{message}}
	{% else %}
    Sorry {{w3cname}} error to {{ request.META.PATH }}.
    {% endif%}
    </TITLE>
  </HEAD>
  <BODY>
    <h2>{{w3cname}}</h2>
    <p>{% if message %}
		{{message}}
	{% else %}
    Sorry {{w3cname}} error to {{ request.META.PATH }}.
    {% endif%}</p>
  </BODY>
</HTML>""")

		# now use context and render template
		c = RequestContext(request, {
		'message': exception.message,
		'w3cname': httplib.responses.get(exception.status, str(exception.status))
		})

		return HttpResponse(t.render(c), status=exception.status)
	#encoding: UTF-8

	from django.conf import settings
	from django.core.exceptions import ViewDoesNotExist
	from django.http import HttpResponse
	from django.template import RequestContext,Template,loader,TemplateDoesNotExist
	from django.utils.importlib import import_module
	import httplib

	class HttpException(Exception):
	""" Exception for Http Errors"""
	def __init__(self, message, status=500):
	self.status = status
	super(HttpException, self).__init__(message)

	class HttpExceptionMiddleware(object):
	"""
	Replace Status code raises for a {{status}}.html rendered template
	"""
	def process_exception(self, request, exception):
	"""
	Render a {{status}}.html template or a hardcoded html as status page, but only if
	exception is instance of HttpException class
	"""
	# we need to import to use isinstance
	from http import HttpException
	if not isinstance(exception,HttpException):
	# Return None make that django reraise exception:
	# http://docs.djangoproject.com/en/dev/topics/http/middleware/#process_exception
	return None

	print exception.status

	try:
	# Handle import error but allow any type error from view
	callback = getattr(import_module(settings.ROOT_URLCONF),'handler' + str(exception.status))
	return callback(request,exception)
	except (ImportError,AttributeError),e:
	# doesn't exist a handler{{status}}, try get template
	try:
	t = loader.get_template(str(exception.status) + '.html')
	except TemplateDoesNotExist:
	# doesn't exist a template in path, use hardcoded template
	t = Template("""
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
	"http://www.w3.org/TR/html4/strict.dtd">
	<HTML>
	<HEAD>
	<TITLE>
	{% if message %}
	{{message}}
	{% else %}
	Sorry {{w3cname}} error to {{ request.META.PATH }}.
	{% endif%}
	</TITLE>
	</HEAD>
	<BODY>
	<h2>{{w3cname}}</h2>
	<p>{% if message %}
	{{message}}
	{% else %}
	Sorry {{w3cname}} error to {{ request.META.PATH }}.
	{% endif%}</p>
	</BODY>
	</HTML>""")

	# now use context and render template
	c = RequestContext(request, {
	'message': exception.message,
	'w3cname': httplib.responses.get(exception.status, str(exception.status))
	})

	return HttpResponse(t.render(c), status=exception.status)