Fix back navigation after POST form submission #1014
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This commit fixes a bug where navigating back after submitting a POST form would not show the previous page. The bug was introduced in #949. The new cache API is async since it needs to access CacheStorage which is async. In that PR, getCachedSnapshot was changed to be async, but hasCachedSnapshot was not changed. This meant that getCachedSnapshot would always return a promise, which is truthy, and so hasCachedSnapshot which just checked that the return value was not null would always return true. The bug would show up when you tried to navigate back to a page after a post form submission. The form submission would clear the cache, but the restoration visit would think it had a cached snapshot and so would not issue a request. This meant that the page would not be restored and nothing would happen. There's a new test in navigation_tests.js that reproduces this bug. The fix is to make hasCachedSnapshot async and await it in the places where it is used.
kevinmcconnell
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Sep 28, 2023
afcapel
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Nov 13, 2023
* Revert "Move cache snapshot loading to Visit#start() (#1056)" This reverts commit e07639f. * Revert "Fix back navigation after POST form submission (#1014)" This reverts commit c207f5b. * Revert "Add disk cache store (#949)" This reverts commit f86a376. * Remove redudant test prefix * Bring back test Orginally added by @jayohms in 60cfbee
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This commit fixes a bug where navigating back after submitting a POST form would not show the previous page. The bug was introduced in #949. The new cache API is async since it needs to access
CacheStoragewhich is async. In that PR,getCachedSnapshotwas changed to be async, buthasCachedSnapshotwas not changed. This meant thatgetCachedSnapshotwould always return a promise, which is truthy, and sohasCachedSnapshotwhich just checked that the return value was not null would always return true.The bug would show up when you tried to navigate back to a page after a post form submission. The form submission would clear the cache, but the restoration visit would think it had a cached snapshot and so would not issue a request. This meant that the page would not be restored and nothing would happen.
There's a new test in navigation_tests.js that reproduces this bug.
The fix is to make
hasCachedSnapshotasync and await it in the places where it is used.