def get_image_meta_from_headers(response):
"""
Processes HTTP headers from a supplied response that
match the x-image-meta and x-image-meta-property and
returns a mapping of image metadata and properties
:param response: Response to process
"""
result = {}
properties = {}
if hasattr(response, 'getheaders'): # httplib.HTTPResponse
headers = response.getheaders()
else: # webob.Response
headers = response.headers.items()
for key, value in headers:
key = str(key.lower())
if key.startswith('x-image-meta-property-'):
field_name = key[len('x-image-meta-property-'):].replace('-', '_')
properties[field_name] = value or None
elif key.startswith('x-image-meta-'):
field_name = key[len('x-image-meta-'):].replace('-', '_')
if 'x-image-meta-' + field_name not in IMAGE_META_HEADERS:
msg = _("Bad header: %(header_name)s") % {'header_name': key}
raise exc.HTTPBadRequest(msg, content_type="text/plain")
result[field_name] = value or None
result['properties'] = properties
for key, nullable in [('size', False), ('min_disk', False),
('min_ram', False), ('virtual_size', True)]:
if key in result:
try:
result[key] = int(result[key])
except ValueError:
if nullable and result[key] == str(None):
result[key] = None
else:
extra = (_("Cannot convert image %(key)s '%(value)s' "
"to an integer.") % {
'key': key,
'value': result[key]
})
raise exception.InvalidParameterValue(value=result[key],
param=key,
extra_msg=extra)
if result[key] < 0 and result[key] is not None:
extra = (_("Image %(key)s must be >= 0 "
"('%(value)s' specified).") % {
'key': key,
'value': result[key]
})
raise exception.InvalidParameterValue(value=result[key],
param=key,
extra_msg=extra)
for key in ('is_public', 'deleted', 'protected'):
if key in result:
result[key] = strutils.bool_from_string(result[key])
return result
def min_ram(self, value):
if value and value < 0:
extra_msg = _('Cannot be a negative value')
raise exception.InvalidParameterValue(value=value,
param='min_ram',
extra_msg=extra_msg)
self._min_ram = value
def validate_quotes(value):
"""Validate filter values
Validation opening/closing quotes in the expression.
"""
open_quotes = True
for i in range(len(value)):
if value[i] == '"':
if i and value[i - 1] == '\\':
continue
if open_quotes:
if i and value[i - 1] != ',':
msg = _("Invalid filter value %s. There is no comma "
"before opening quotation mark.") % value
raise exception.InvalidParameterValue(message=msg)
else:
if i + 1 != len(value) and value[i + 1] != ",":
msg = _("Invalid filter value %s. There is no comma "
"after closing quotation mark.") % value
raise exception.InvalidParameterValue(message=msg)
open_quotes = not open_quotes
if not open_quotes:
msg = _("Invalid filter value %s. The quote is not closed.") % value
raise exception.InvalidParameterValue(message=msg)
