def process(self, constant, content):
if constant.options["src"] is not None:
try:
# Translate relative paths and such. We'll need to look up
# the actual XmlConfig handling this constant. Its root
# element will know the name originally passed into
# getConfig(name)
url = getConfig(constant.root.name).get_real_location(
constant.options["src"], for_import=True)
fp = urlopen(url)
except ValueError:
# Invalid url
raise
else:
return fp.read()
def load(self, url, namespace=LOCAL_NAMESPACE, for_import=False):
# Keep track of loaded files to ward off circular dependencies. If
# a file is requested to be loaded that is already, and it has not
# been modified since loading, don't load it.
load = False
# Get normalized, real location of url
url = self.get_real_location(url, for_import)
# Go ahead and open the url now so that we can check the time of
# last update (for reloading)
content = urlopen(url)
if len(self._files) == 0:
# This is the first document loaded. Remember it for future
# reloading and importing, etc.
self._original_url = url
if url in self._files:
# Don't load if the file is already loaded under a difference
# namespace
if self._files[url]['namespace'] != namespace:
# Already loaded this file, so just create a link to another
# namespace. This will allow two documents to import the same
# document into different namespaces. Doing so without links
# would create unnecessary imports and potential circular
# dependency issues
self.links[namespace] = self._files[url]['namespace']
load = False
#
# XXX Check if 'last-modified' in headers
# Reload if the file has been modified
elif self._files[url]['headers']['last-modified'] \
!= content.headers['last-modified']:
load = True
#
# If file has never been loaded, it should be loaded (duh)
else:
load=True
if load:
self.on_load.fire(url, namespace)
self._files[url] = {
'namespace': namespace,
'headers': dict(content.headers.items())
}
self.parse(content, namespace)
content.close()
