Offline message is no longer displayed

[teosarca]

Type of issue

Bug

Current behavior

If the server is down, the frontend screen is grayed out (OK) but there is no message displayed.

Expected behavior

The offline mode message shall be displayed.

See also / might be related to:

• frontend shall switch to offline mode on http 503 error #1045
• Add translations for "Offline mode" overlay #1049

[wiadev]

@teosarca This works fine UNTIL we reload the page (while staying offline).

If we try to refresh page without connection established (e.g. being offline) - localized messages doesn't load as well, thus nothing to display.

If your server is down, it's very unlikely to get anything in response to API i18n/messages request.

Then we're getting empty list of localized messages, thus when component displays error message (expecting localized strings) it couldn't display anything.

I will add english fallback message if locale isn't loaded.

[teosarca]

@wiadev

I will add english fallback message if locale isn't loaded.

yes.

I guess, complementary, i shall instruct the browser to cache the i18n/messages response (using Cache-control header). wdyt?

[wiadev]

@teosarca
This is optional, but might help for some cases. There are no any guarantees from browser that such requests will be surely cached. It could put into cache or not. Imagine the case when user turned it off (cache). Or no free disk space. Yes, these cases are not that often, but it could happen so browser will not use cache anymore.

[teosarca]

Thanks for input @wiadev .
But still, we can have this caching (I will implement sometime in the future) and ALSO have the fallback message on frontend side (which will be implemented by you in this task).

[metas-dh]

Results of IT1
tested in mf15

• correct msg displayed when Server is down (e.g. during rollout), not just grayed out screen: OK