def get_image_meta_or_404(self, request, image_id):
"""
Grabs the image metadata for an image with a supplied
identifier or raises an HTTPNotFound (404) response
:param request: The WSGI/Webob Request object
:param image_id: The opaque image identifier
:raises HTTPNotFound if image does not exist
"""
context = request.context
try:
return registry.get_image_metadata(context, image_id)
except exception.NotFound:
msg = _("Image with identifier %s not found") % image_id
logger.debug(msg)
raise webob.exc.HTTPNotFound(msg,
request=request,
content_type='text/plain')
except exception.NotAuthorized:
msg = _("Unauthorized image access")
logger.debug(msg)
raise webob.exc.HTTPForbidden(msg,
request=request,
content_type='text/plain')
def fetch_image_into_cache(self, image_id):
ctx = registry.get_client_context(self.conf, is_admin=True, show_deleted=True)
try:
image_meta = registry.get_image_metadata(ctx, image_id)
if image_meta["status"] != "active":
logger.warn(_("Image '%s' is not active. Not caching."), image_id)
return False
except exception.NotFound:
logger.warn(_("No metadata found for image '%s'"), image_id)
return False
image_data, image_size = get_from_backend(image_meta["location"])
logger.debug(_("Caching image '%s'"), image_id)
self.cache.cache_image_iter(image_id, image_data)
return True
def queue_image(self, image_id):
ctx = \
registry.get_client_context(conf, is_admin=True, show_deleted=True)
try:
image_meta = registry.get_image_metadata(ctx, image_id)
if image_meta['status'] != 'active':
logger.warn(_("Image '%s' is not active. Not queueing."),
image_id)
return False
except exception.NotFound:
logger.warn(_("No metadata found for image '%s'"), image_id)
return False
logger.debug(_("Queueing image '%s'"), image_id)
self.cache.queue_image(image_id)
return True
def fetch_image_into_cache(self, image_id):
ctx = registry.get_client_context(self.conf,
is_admin=True, show_deleted=True)
try:
image_meta = registry.get_image_metadata(ctx, image_id)
if image_meta['status'] != 'active':
logger.warn(_("Image '%s' is not active. Not caching."),
image_id)
return False
except exception.NotFound:
logger.warn(_("No metadata found for image '%s'"), image_id)
return False
image_data, image_size = get_from_backend(image_meta['location'])
logger.debug(_("Caching image '%s'"), image_id)
self.cache.cache_image_iter(image_id, image_data)
return True
def process_request(self, request):
"""
For requests for an image file, we check the local image
cache. If present, we return the image file, appending
the image metadata in headers. If not present, we pass
the request on to the next application in the pipeline.
"""
if request.method != 'GET':
return None
match = get_images_re.match(request.path)
if not match:
return None
image_id = match.group(2)
# /images/detail is unfortunately supported, so here we
# cut out those requests and anything with a query
# parameter...
# See LP Bug #879136
if '?' in image_id or image_id == 'detail':
return None
if self.cache.is_cached(image_id):
logger.debug(_("Cache hit for image '%s'"), image_id)
image_iterator = self.get_from_cache(image_id)
context = request.context
try:
image_meta = registry.get_image_metadata(context, image_id)
response = webob.Response()
return self.serializer.show(response, {
'image_iterator': image_iterator,
'image_meta': image_meta
})
except exception.NotFound:
msg = _("Image cache contained image file for image '%s', "
"however the registry did not contain metadata for "
"that image!" % image_id)
logger.error(msg)
return None
def process_request(self, request):
"""
For requests for an image file, we check the local image
cache. If present, we return the image file, appending
the image metadata in headers. If not present, we pass
the request on to the next application in the pipeline.
"""
if request.method != 'GET':
return None
match = get_images_re.match(request.path)
if not match:
return None
image_id = match.group(2)
# /images/detail is unfortunately supported, so here we
# cut out those requests and anything with a query
# parameter...
# See LP Bug #879136
if '?' in image_id or image_id == 'detail':
return None
if self.cache.is_cached(image_id):
logger.debug(_("Cache hit for image '%s'"), image_id)
image_iterator = self.get_from_cache(image_id)
context = request.context
try:
image_meta = registry.get_image_metadata(context, image_id)
response = webob.Response()
return self.serializer.show(response, {
'image_iterator': image_iterator,
'image_meta': image_meta})
except exception.NotFound:
msg = _("Image cache contained image file for image '%s', "
"however the registry did not contain metadata for "
"that image!" % image_id)
logger.error(msg)
return None
def get_image_meta_or_404(self, request, image_id):
"""
Grabs the image metadata for an image with a supplied
identifier or raises an HTTPNotFound (404) response
:param request: The WSGI/Webob Request object
:param image_id: The opaque image identifier
:raises HTTPNotFound if image does not exist
"""
context = request.context
try:
return registry.get_image_metadata(context, image_id)
except exception.NotFound:
msg = _("Image with identifier %s not found") % image_id
logger.debug(msg)
raise webob.exc.HTTPNotFound(
msg, request=request, content_type='text/plain')
except exception.NotAuthorized:
msg = _("Unauthorized image access")
logger.debug(msg)
raise webob.exc.HTTPForbidden(msg, request=request,
content_type='text/plain')
