url file://%(curdir)s/%(datadir)s/base1.html
cache key file://%(curdir)s/%(datadir)s/base1.html
real url file://%(curdir)s/%(datadir)s/base1.html
valid

url base2.html
cache key file://%(curdir)s/%(datadir)s/base2.html
real url file://%(curdir)s/%(datadir)s/base2.html
valid

url base2.html (cached)
cache key file://%(curdir)s/%(datadir)s/base2.html
real url file://%(curdir)s/%(datadir)s/base2.html
valid