882476 - Response header does not display until buffering was completed/download was completed

Status: NEW

(DevTools :: Netmonitor, defect, P3)

Description

[Alice0775 White]

Build Identifier:
http://hg.mozilla.org/mozilla-central/rev/0414d6d0f60d
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20130612 Firefox/24.0 ID:20130612031138

Steps To Reproduce:
1. Clear cache if necessary
2. Open Web Console(Ctrl+Shift+K) and turn on Net "Log Request and Response Bodies"
3. Open mp3 
    ex. http://radioexpress.com/public/demo_audio/btb_NT_SAMPLE_MUSIC_BEDS_Tune_Up_138bpm_A.mp3
        http://www.fbcdixon.net/sermons/06.09.13.mp3
4. Click a Net log entry
   --- observe Response header
5. Wait to completion buffering and Click a Net log entry when completed buffering
   (NOTE: this may fail due to Bug 882470. until fixed the Bug 882470, you need reload)
   --- observe Response header

Actual Results:
 No Response header displayed at Step 4

Expected Results:
 Response header should display at Step 4

Comment 1

[Alice0775 White]

This also happens down load a file.

Steps To Reproduce:
1. Clear cache if necessary
2. Open http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-central/
3. Click on zip file
4. Click a Net log entry
   --- observe Response header
5. Choose Open / Save and Wait for the completion of the command
6. Click a Net log entry
   --- observe Response header

Actual Results:
 No Response header displayed at Step 4

Comment 2

[Mihai Sucan [:msucan]]

Thanks for the bug report.

This is working as expected, within technical limits. We are waiting for the parsed HTTP headers from Gecko. I haven't found a way to get them earlier. Suggestions are welcome.

Comment 3

[Alice0775 White]

(In reply to Mihai Sucan [:msucan] from comment #2)
> Thanks for the bug report.
> 
> This is working as expected, within technical limits. We are waiting for the
> parsed HTTP headers from Gecko. I haven't found a way to get them earlier.
> Suggestions are welcome.

I do not believe that this is Gecko limitation.

Because, This addon can handle response header during buffering
https://addons.mozilla.org/en-US/firefox/addon/live-http-headers

Comment 4

[Mihai Sucan [:msucan]]

Live HTTP headers prints the raw HTTP headers, unparsed, as they are received - I know how we can do that quite earlier. However, we wait for the parsed HTTP headers. I'm not saying it's impossible, but back when I wrote the code it wasn't obvious how to do it earlier.

Comment 5

[Patrick Brosset <:pbro>]

I tested this in Firefox 59, and I still see an issue. In the console and netmonitor, the request is displayed for som time, and then disappears.