20854 2013-02-02 11:12:38 +0000 appcache : fallback entries need clarification on duplicates 2013-04-24 16:29:11 +0000 1 1 1 Unclassified HTML WG HTML5 spec unspecified PC All RESOLVED INVALID CR P2 normal --- 1 l.laurent.p robin cwilso ian mike public-html-admin public-html-wg-issue-tracking robin public-html-bugzilla oldest_to_newest 82499 0 l.laurent.p 2013-02-02 11:12:38 +0000 Hi The reference http://www.w3.org/html/wg/drafts/html/master/browsers.html#concept-appcache-fallback needs to mention that fallback entries can't contain uri duplicates. Use case : on first manifest visit, cookieless user agent may use url rewriting for resources, ie use a ";jsessionid=" trail or some other kind of session parameter. The uri + session trail seems to be the cache key at least on iOS devices. The following manifest will cause Chrome 24 to fail loading the manifest, with a cryptic "Application Cache Error event: Failed to commit new cache to storage" error message : CACHE MANIFEST /foo.php FALLBACK: / /fallback.php / /fallback.php?sessionid=1234 NETWORK: * This will fail because of the duplicate /fallback.php line. Removing the second one with ?sessionid fixes the problem. I believe Chrome does not know which fallback line to use. Thanks 82648 1 ian 2013-02-06 21:43:58 +0000 That's just a bug in chrome. The spec allows "nested" fallback entries like this. 86690 2 robin 2013-04-24 16:29:11 +0000 EDITOR'S RESPONSE: This is an Editor's Response to your comment. If you are satisfied with this response, please change the state of this bug to CLOSED. If you have additional information and would like the Editor to reconsider, please reopen this bug. If you would like to escalate the issue to the full HTML Working Group, please add the TrackerRequest keyword to this bug, and suggest title and text for the Tracker Issue; or you may create a Tracker Issue yourself, if you are able to do so. For more details, see this document: http://dev.w3.org/html5/decision-policy/decision-policy.html Status: Rejected Change Description: none Rationale: A duplicate fallback namespace is just ignored as per spec, this is just an implementation error.