1#!/usr/bin/env python
2import os
3
4
5etag = os.environ.get("HTTP_IF_NONE_MATCH", None)
6if etag:
7    print "Status: 304 Not Modified"
8else:
9    print "Status: 200 Ok"
10    print 'ETag: "123456779"'
11    print "Content-Type: text/html"
12    print ""
13    print "<html></html>"
14