def __init__(self, zipURI):
self.filesize = None<EOL>self.zipURI = zipURI<EOL>self.tableOfContents = None<EOL>self.request = None<EOL>self.start = None<EOL>self.end = None<EOL>self.directory_end = None<EOL>self.raw_bytes = None<EOL>self.directory_size = None<EOL>
zipURI should be an HTTP URL hosted on a server that supports ranged requests.
The init function will determine if the file exists and raise a urllib2 exception if not.