def _validate_source(source, req):
"""
External sources (as specified via the location or copy-from headers)
are supported only over non-local store types, i.e. S3, Swift, HTTP.
Note the absence of file:// for security reasons, see LP bug #942118.
If the above constraint is violated, we reject with 400 "Bad Request".
"""
if source:
pieces = urlparse.urlparse(source)
schemes = [scheme for scheme in get_known_schemes()
if scheme != 'file']
for scheme in schemes:
if pieces.scheme == scheme:
return source
msg = _("External sourcing not supported for store %s") % source
LOG.debug(msg)
raise HTTPBadRequest(explanation=msg,
request=req,
content_type="text/plain")
def _reserve(self, req, image_meta):
"""
Adds the image metadata to the registry and assigns
an image identifier if one is not supplied in the request
headers. Sets the image's status to `queued`.
:param req: The WSGI/Webob Request object
:param id: The opaque image identifier
:param image_meta: The image metadata
:raises HTTPConflict if image already exists
:raises HTTPBadRequest if image metadata is not valid
"""
location = self._external_source(image_meta, req)
store = image_meta.get('store')
if store and store not in get_known_schemes():
msg = _("Required store %s is invalid") % store
LOG.debug(msg)
raise HTTPBadRequest(explanation=msg, content_type='text/plain')
image_meta['status'] = ('active'
if image_meta.get('size') == 0 else 'queued')
if location:
try:
store = get_store_from_location(location)
except exception.BadStoreUri:
msg = _("Invalid location %s") % location
LOG.debug(msg)
raise HTTPBadRequest(explanation=msg,
request=req,
content_type="text/plain")
# check the store exists before we hit the registry, but we
# don't actually care what it is at this point
self.get_store_or_400(req, store)
# retrieve the image size from remote store (if not provided)
image_meta['size'] = self._get_size(req.context, image_meta,
location)
else:
# Ensure that the size attribute is set to zero for directly
# uploadable images (if not provided). The size will be set
# to a non-zero value during upload
image_meta['size'] = image_meta.get('size', 0)
try:
image_meta = registry.add_image_metadata(req.context, image_meta)
self.notifier.info("image.create", redact_loc(image_meta))
return image_meta
except exception.Duplicate:
msg = (_("An image with identifier %s already exists") %
image_meta['id'])
LOG.debug(msg)
raise HTTPConflict(explanation=msg,
request=req,
content_type="text/plain")
except exception.Invalid as e:
msg = _("Failed to reserve image. Got error: %(e)s") % {'e': e}
for line in msg.split('\n'):
LOG.debug(line)
raise HTTPBadRequest(explanation=msg,
request=req,
content_type="text/plain")
except exception.Forbidden:
msg = _("Forbidden to reserve image.")
LOG.debug(msg)
raise HTTPForbidden(explanation=msg,
request=req,
content_type="text/plain")
