STR:

1. Copy the attached PHP and HTML files into your webserver
2. Load the index.html file in Firefox.
3. The page should show "Server Time". The time should be updated every second.
4. Open DevTools and select the Network panel. Realod the page.
5. Select the server.php request
6. Select the Response panel, events are not displayed => BUG

Expected Result:
Server side events should be displayed in the Response tab.

Tested also in Chrome DevTools and it works, I can see the events.

Honza

Thanks for reporting Honza.

This is likely related to Bug 1773181. The BUG here is that showing of the messages in response panel and the header information in headers panel are all blocked until the SSE channel for that request is closed.

In the STR above it never closes so we won't get those messages. I think that was the behaviour from when it was implemented, we should fix and show the messages as they come in.

Since its completely blocking the panels, i think we should prioritize fix.

i'll take a look