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Clean up app cache updating code path

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Kovid Goyal 2017-06-02 09:39:16 +05:30
parent b3fb9d850a
commit 9872eca235
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1 changed files with 16 additions and 3 deletions
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19
src/pyj/srv.pyj
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@ -13,21 +13,34 @@ from read_book.iframe import init
is_running_in_iframe = False # Changed before script is loaded in the iframe is_running_in_iframe = False # Changed before script is loaded in the iframe
autoreload_enabled = False autoreload_enabled = False
asked_appcache_update = False
AUTO_UPDATE_THRESHOLD = 1000 # millisecs
if is_running_in_iframe: if is_running_in_iframe:
init() init()
else: else:
window.applicationCache.addEventListener('updateready', def(): start_time = window.performance.now()
on_appcache_ready = def ():
nonlocal asked_appcache_update
if asked_appcache_update:
return
if window.applicationCache.status is window.applicationCache.UPDATEREADY: if window.applicationCache.status is window.applicationCache.UPDATEREADY:
asked_appcache_update = True
try: try:
window.applicationCache.swapCache() window.applicationCache.swapCache()
if autoreload_enabled or window.confirm(_('The calibre web application has been updated. Do you want reload the site?')): time_since_start = window.performance.now() - start_time
if time_since_start <= AUTO_UPDATE_THRESHOLD or autoreload_enabled or window.confirm(_(
'The calibre web application has been updated. Do you want reload the site?')):
window.location.reload() window.location.reload()
except Exception as e: except Exception as e:
# For some reason swapCache occasionally fails even though status is UPDATEREADY # For some reason swapCache occasionally fails even though status is UPDATEREADY
print('WARNING: failed to swap applicationCache') print('WARNING: failed to swap applicationCache')
console.log(e) console.log(e)
, False)
window.applicationCache.addEventListener('updateready', on_appcache_ready)
if window.applicationCache.status is window.applicationCache.UPDATEREADY:
on_appcache_ready()
script = document.currentScript or document.scripts[0] script = document.currentScript or document.scripts[0]
main_js(script.textContent) main_js(script.textContent)
script.parentNode.removeChild(script) # save some memory script.parentNode.removeChild(script) # save some memory