def handle_GET(self, request, context):
if not getattr(self.conf, 'expose_view', False):
raise Http404
ua = request.GET.get('ua', request.META.get('HTTP_USER_AGENT', ''))
ua = ua.decode('ascii', 'ignore')
try:
device = devices.select_ua(
ua,
search=vsa
)
except (KeyError, DeviceNotFound):
device = devices.select_id('generic_xhtml')
accepts = self.parse_accept_header(request.META.get('HTTP_ACCEPT', ''))
renderers = MediaType.resolve(accepts, self.FORMATS_BY_MIMETYPE)
formats = [renderer.format for renderer in renderers]
context.update({
'id': device.devid,
'is_mobile': not 'generic_web_browser' in device_parents[device.devid],
'brand_name': device.brand_name,
'model_name': device.model_name,
'ua': ua,
'matched_ua': device.devua,
'accept': request.META.get('HTTP_ACCEPT', ''),
'formats': formats
})
if request.GET.get('capabilities') == 'true':
context['capabilities'] = dict((k, getattr(device, k)) for k in dir(device) if (not k.startswith('_') and not k.startswith('dev') and not k in ('groups','children')))
return self.render(request, context, 'wurfl/index')
def parse_accept_header(self, accept):
media_types = []
for media_type in accept.split(','):
try:
media_types.append(MediaType(media_type))
except ValueError:
pass
return media_types
def render(self, request, context, template_name, expires=None):
"""
Given a request, a context dictionary and a template name, this renders
the template with the given context according to the capabilities and
requested format of the client. An optional final argument is that of
a timedelta object, which sets additional caching headers for the
content.
"""
context.pop('exposes_user_data', None)
if 'format' in request.REQUEST:
formats = request.REQUEST['format'].split(',')
renderers, seen_formats = [], set()
for format in formats:
if format in self.FORMATS and format not in seen_formats:
renderers.append(self.FORMATS[format])
elif request.META.get('HTTP_ACCEPT'):
accepts = self.parse_accept_header(request.META['HTTP_ACCEPT'])
renderers = MediaType.resolve(accepts, self.FORMATS_BY_MIMETYPE)
else:
renderers = [self.FORMATS['html']]
# Stop external sites from grabbing JSON representations of pages
# which contain sensitive user information.
try:
offsite_referrer = 'HTTP_REFERER' in request.META and \
request.META['HTTP_REFERER'].split('/')[2] != \
request.META.get('HTTP_HOST')
except IndexError:
# Malformed referrers (i.e., those not containing a full URL) throw
# this
offsite_referrer = True
for renderer in renderers:
if renderer.format != 'html' and context.get('exposes_user_data') \
and offsite_referrer:
continue
try:
response = renderer(request, context, template_name)
except NotImplementedError:
continue
else:
if expires is not None:
response['Expires'] = formatdate(
mktime((datetime.now() + expires).timetuple()))
# if expires is negative, then consider this to be no-cache
if expires < timedelta(seconds=0):
response['Cache-Control'] = 'no-cache'
else:
response['Cache-Control'] = 'max-age=%d' % \
(expires.seconds + expires.days * 24 * 3600)
return response
else:
if 'format' not in request.REQUEST:
tried_mimetypes = list(itertools.chain(*[r.mimetypes
for r in renderers]))
response = HttpResponse(
_("Your Accept header didn't contain any supported media ranges.") + \
"\n\n" + _("Supported ranges are:") + \
"\n\n * %s\n" % '\n * '.join(
sorted('%s (%s)' % (f[0].value, f[1].format) for f in
self.FORMATS_BY_MIMETYPE if not f[0] in tried_mimetypes)),
mimetype="text/plain")
else:
print self.FORMATS
response = HttpResponse(
_("Unable to render this document in this format.") + "\n\n" +
_("Supported formats are") + ":\n\n * %s\n" \
% '\n * '.join(self.FORMATS.keys()),
mimetype="text/plain")
response.status_code = 406 # Not Acceptable
return response
def g(f):
f.is_renderer = True
f.format = format
f.mimetypes = set(
MediaType(mimetype, priority) for mimetype in mimetypes)
return f
def render(self, request, context, template_name, expires=None):
"""
Given a request, a context dictionary and a template name, this renders
the template with the given context according to the capabilities and
requested format of the client. An optional final argument is that of
a timedelta object, which sets additional caching headers for the
content.
"""
context.pop('exposes_user_data', None)
if 'format' in request.REQUEST:
formats = request.REQUEST['format'].split(',')
renderers, seen_formats = [], set()
for format in formats:
if format in self.FORMATS and format not in seen_formats:
renderers.append(self.FORMATS[format])
elif request.META.get('HTTP_ACCEPT'):
accepts = self.parse_accept_header(request.META['HTTP_ACCEPT'])
renderers = MediaType.resolve(accepts, self.FORMATS_BY_MIMETYPE)
else:
renderers = [self.FORMATS['html']]
# Stop external sites from grabbing JSON representations of pages
# which contain sensitive user information.
try:
offsite_referrer = 'HTTP_REFERER' in request.META and \
request.META['HTTP_REFERER'].split('/')[2] != \
request.META.get('HTTP_HOST')
except IndexError:
# Malformed referrers (i.e., those not containing a full URL) throw
# this
offsite_referrer = True
for renderer in renderers:
if renderer.format != 'html' and context.get('exposes_user_data') \
and offsite_referrer:
continue
try:
response = renderer(request, context, template_name)
except NotImplementedError:
continue
else:
if expires is not None and not settings.DEBUG and \
not getattr(settings, 'NO_CACHE', False):
response['Expires'] = formatdate(
mktime((datetime.now() + expires).timetuple()))
# if expires is negative, then consider this to be no-cache
if expires < timedelta(seconds=0):
response['Cache-Control'] = 'no-cache'
else:
response['Cache-Control'] = 'max-age=%d' % \
(expires.seconds + expires.days * 24 * 3600)
return response
else:
if 'format' not in request.REQUEST:
tried_mimetypes = list(
itertools.chain(*[r.mimetypes for r in renderers]))
response = HttpResponse(
_("Your Accept header didn't contain any supported media ranges.") + \
"\n\n" + _("Supported ranges are:") + \
"\n\n * %s\n" % '\n * '.join(
sorted('%s (%s)' % (f[0].value, f[1].format) for f in
self.FORMATS_BY_MIMETYPE if not f[0] in tried_mimetypes)),
mimetype="text/plain")
else:
response = HttpResponse(
_("Unable to render this document in this format.") + "\n\n" +
_("Supported formats are") + ":\n\n * %s\n" \
% '\n * '.join(self.FORMATS.keys()),
mimetype="text/plain")
response.status_code = 406 # Not Acceptable
return response
