Bug 39693 – index.json.gz is downloaded multiple times

Bug 39693 - index.json.gz is downloaded multiple times


Summary:	index.json.gz is downloaded multiple times

Status:	RESOLVED WONTFIX

Product:	UCS
Classification:	Unclassified
Component:	App Center
Version:	UCS 4.1
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	App Center maintainers
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Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2015-10-31 10:04 CET by Stefan Gohmann
Modified:	2019-01-03 07:23 CET (History)
CC List:	3 users (show)

See Also:
What kind of report is it?:	Bug Report
What type of bug is this?:	2: Improvement: Would be a product improvement
Who will be affected by this bug?:	3: Will affect average number of installed domains
How will those affected feel about the bug?:	1: Nuisance – not a big deal but noticeable
User Pain:	0.034
Enterprise Customer affected?:
School Customer affected?:
ISV affected?:
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Attachments
appcenter.log (122.44 KB, application/text) 2015-10-31 10:04 CET, Stefan Gohmann	Details
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Description Stefan Gohmann

2015-10-31 10:04:40 CET

Created attachment 7240 [details]
appcenter.log

I've changed in one App Center session the autostart behavior for a Docker App:
 - Opening App details
 - changing autostart
 - apply
 - opening App details
 - changing autostart back
 - apply

It looks like the index.json.gz was downloaded two times and a lot of Apps are loaded and unloaded. The logfile part is not from the whole session, only from the actions described above.

Comment 1 Florian Best

2015-11-18 11:26:26 CET

Btw. can't we store the E-Tag and make conditional HTTP requests?

Comment 2 Alexander Kläser

2015-11-22 23:45:31 CET

(In reply to Florian Best from comment #1)
> Btw. can't we store the E-Tag and make conditional HTTP requests?

+1

Comment 3 Florian Best

2015-11-23 17:07:24 CET

curl -I -H 'If-None-Match: "93c18eb-5d8d-5253595118100"' https://appcenter.software-univention.de/meta-inf/4.1/index.json.gz
HTTP/1.1 304 Not Modified
Date: Mon, 23 Nov 2015 16:06:21 GMT
Server: Apache/2.2.22 (Debian)
ETag: "93c18eb-5d8d-5253595118100"

Comment 4 Dirk Wiesenthal

2015-11-30 22:43:30 CET

(In reply to Florian Best from comment #1)
> Btw. can't we store the E-Tag and make conditional HTTP requests?

Bug#40136 because the two issues (Comment 1 and Comment 2) are very distinct. The initial bug report is harder to fix.

After applying changes in the App Settings page, the container was stopped, or the settings were adjusted, the autostart changed... This effects the App.js object. Therefore the App Center is queried again (to get a fresh copy of that app from the server). This triggers the download of index.json.

This is not very elegant. One could just query that very app (without hitting the App Center server). But one has to be careful updating the JS cache that filled the Gallery.

Comment 5 Stefan Gohmann

2019-01-03 07:23:09 CET

This issue has been filled against UCS 4.1. The maintenance with bug and security fixes for UCS 4.1 has ended on 5st of April 2018.

Customers still on UCS 4.1 are encouraged to update to UCS 4.3. Please contact
your partner or Univention for any questions.

If this issue still occurs in newer UCS versions, please use "Clone this bug" or simply reopen the issue. In this case please provide detailed information on how this issue is affecting you.