def read_opf_metadata (filename, metadata=None):
if metadata is None:
metadata = Metadata(OPF2)
read_file_metadata(filename, metadata)
with closing(open(filename, 'r')) as stream:
metadata.opf = parse_opf_xml(stream.read())
return metadata
def read_pdb_metadata(filename, metadata=None):
if metadata is None:
metadata = Metadata(None)
read_file_metadata(filename, metadata)
with closing(open(filename, "rb")) as stream:
metadata.pdb = _parse_pdb_header(stream)
return metadata
def read_epub_metadata (filename, metadata=None):
if metadata is None:
metadata = Metadata(EPUB2)
read_file_metadata(filename, metadata)
reader = zip_reader(filename)
try:
container = _parse_container_xml(reader(CONTAINER_PATH))
except KeyError:
raise EPubException('missing OCF container.xml')
try:
metadata.opf = parse_opf_xml(reader(container[OPF2.mimetype]))
except KeyError:
raise EPubException('missing OPF package file')
return metadata