html5 application cache manifest file progress error

in my web app i am using simple.manifest file for application cache. if i write as

CACHE MANIFEST

CACHE:

img/logo.png

FALLBACK:

/ offline.html

NETWORK:

*

it's working fine. but if i write as

CACHE MANIFEST

CACHE:

/img/logo.png

FALLBACK:

/ /offline.html

NETWORK:

*

it's not working. i am getting error resourse fetch failed(404) . i am working in apche tomcat. i pute my apps as

apache/webapps/sconnolly/offline.html

apache/webapps/sconnolly/img/开发者_运维技巧logo.png

apache/webapps/sconnolly/sample.manifest

what may be cause of this error.

The leading slash refers to the root directory. Whereas if you omit the leading slash the url will be relative to the path you're in.

Therefore:

img/logo.png will refer to apache/webapps/sconnolly/img/logo.png

Whereas

/img/logo.pmg will most likely refer to apache/webapps/img/logo.png