Re: [Tails-dev] Server-side caching settings of IDF

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Autore: intrigeri
Data:  
To: Giorgio Maone, The Tails public development discussion list
Oggetto: Re: [Tails-dev] Server-side caching settings of IDF
Hi,

[fully quoting for Giorgio's sake, who I'm re-adding to the list of recipients]

sajolida wrote (29 Mar 2016 18:12:01 GMT) :
> intrigeri:
>> Giorgio Maone wrote (13 Feb 2016 13:23:00 GMT) :
>>> Whenever a page matching the pattern for a possible UI page (i.e.
>>> "https://tails.boum.org/*"), DAVE currently fetches the IDF. This is
>>> basically the only way to fix https://labs.riseup.net/code/issues/10685,
>>> as noted in https://labs.riseup.net/code/issues/10685#note-5
>>
>>> Of course you can and should limit the actual network activity by
>>> properly using Chache-Control and/or ETag headers.
>>
>> By the way, did you IA+DAVE folks already check if the server-side
>> Cache-Control / ETag settings are OK for the IDF? (I vaguely remember
>> sajolida noticing weird stats in the access logs, that might be caused
>> by suboptimal HTTP server settings.)


> I know that I haven't requested anything special to root@??? for
> this file and the stats I got look like it's not cached properly.
> But I don't know much about these things myself. Here is a full HTTP
> request.


> Should we add "Cache-Control" and "ETag", and remove "Expires"?


I don't know. I'll look into it later this week.

> $ wget --server-response
> https://tails.boum.org/install/v1/Tails/i386/stable/latest.yml
> --2016-03-29 18:06:06--
> https://tails.boum.org/install/v1/Tails/i386/stable/latest.yml
> Resolving tails.boum.org (tails.boum.org)... 204.13.164.188
> Connecting to tails.boum.org (tails.boum.org)|204.13.164.188|:443...
> connected.
> HTTP request sent, awaiting response...
> HTTP/1.1 200 OK
> Date: Tue, 29 Mar 2016 18:06:08 GMT
> Server: Apache/2.2.22 (Debian)
> X-Frame-Options: SAMEORIGIN
> X-XSS-Protection: 1; mode=block
> X-Content-Type-Options: nosniff
> Strict-Transport-Security: max-age=15768000
> Last-Modified: Fri, 18 Mar 2016 20:43:59 GMT
> Accept-Ranges: bytes
> Content-Length: 269
> Cache-Control: max-age=0
> Expires: Tue, 29 Mar 2016 18:06:08 GMT
> Keep-Alive: timeout=15, max=100
> Connection: Keep-Alive
> Content-Type: text/plain
> Content-Language: en
> Length: 269 [text/plain]
> Saving to: ‘latest.yml’


> latest.yml
> 100%[==================================================================>]
>    269  --.-KB/s   in 0s


> 2016-03-29 18:06:09 (2.59 MB/s) - ‘latest.yml’ saved [269/269]


--
intrigeri