def startElement(self, name, attrs, connection):
"""SAX XML logic for parsing new element found."""
if name == CORS_CONFIG:
self.validateParseLevel(name, 0)
self.parse_level += 1
elif name == CORS:
self.validateParseLevel(name, 1)
self.parse_level += 1
elif name in self.legal_collections:
self.validateParseLevel(name, 2)
self.parse_level += 1
self.collection = name
elif name in self.legal_elements:
self.validateParseLevel(name, 3)
# Make sure this tag is found inside a collection tag.
if self.collection is None:
raise InvalidCorsError('Tag %s found outside collection' %
name)
# Make sure this tag is allowed for the current collection tag.
if name not in self.legal_collections[self.collection]:
raise InvalidCorsError('Tag %s not allowed in %s collection' %
(name, self.collection))
self.element = name
else:
raise InvalidCorsError('Unsupported tag ' + name)
def endElement(self, name, value, connection):
"""SAX XML logic for parsing new element found."""
if name == CORS_CONFIG:
self.validateParseLevel(name, 1)
self.parse_level -= 1
elif name == CORS:
self.validateParseLevel(name, 2)
self.parse_level -= 1
# Terminating a CORS element, save any collections we found
# and re-initialize collections list.
self.cors.append(self.collections)
self.collections = []
elif name in self.legal_collections:
self.validateParseLevel(name, 3)
if name != self.collection:
raise InvalidCorsError(
'Mismatched start and end tags (%s/%s)' %
(self.collection, name))
self.parse_level -= 1
if not self.legal_collections[name]:
# If this collection doesn't contain any sub-elements, store
# a tuple of name and this tag's element value.
self.collections.append((name, value.strip()))
else:
# Otherwise, we're terminating a collection of sub-elements,
# so store a tuple of name and list of contained elements.
self.collections.append((name, self.elements))
self.elements = []
self.collection = None
elif name in self.legal_elements:
self.validateParseLevel(name, 3)
# Make sure this tag is found inside a collection tag.
if self.collection is None:
raise InvalidCorsError('Tag %s found outside collection' %
name)
# Make sure this end tag is allowed for the current collection tag.
if name not in self.legal_collections[self.collection]:
raise InvalidCorsError('Tag %s not allowed in %s collection' %
(name, self.collection))
if name != self.element:
raise InvalidCorsError(
'Mismatched start and end tags (%s/%s)' %
(self.element, name))
# Terminating an element tag, add it to the list of elements
# for the current collection.
self.elements.append((name, value.strip()))
self.element = None
else:
raise InvalidCorsError('Unsupported end tag ' + name)
def validateParseLevel(self, tag, level):
"""Verify parse level for a given tag."""
if self.parse_level != level:
raise InvalidCorsError('Invalid tag %s at parse level %d: ' %
(tag, self.parse_level))