varnish 3.0 + mobile app

[Jennings, Raymond]

No it does not - it has to match the hash.

BAN will do the trick but it has the (small) overhead - depending upon your
setup.

My guess is that you might be doing what I was and trying to do in the
beginning which was to purge from another interface.   Your sub vcl_hash is
not returning so the default sub vcl_hash runs after yours and that also
hashes the Host header.

You could try to add the url to your sub vcl_hash and the last line put
"return(hash);"  (to prevent the default handler from running.)

Then try the same purge test you were doing with the headers set.


On Thu, Mar 6, 2014 at 6:50 PM, Paul McInerney <
Paul.McInerney at faredge.com.au> wrote:

> I thought that myself, and have tried purging with the specific header
> being called - still no luck.
>
>
>
> Doesn't a purge by default, remove all variants of the specified URL?
>
>
>
> J
>
>
>
> *From:* Jennings, Raymond [mailto:raymond.jennings at nytimes.com]
> *Sent:* Friday, 7 March 2014 10:06 AM
> *To:* Paul McInerney
> *Cc:* varnish-misc at varnish-cache.org
> *Subject:* Re: varnish 3.0 + mobile app
>
>
>
> I assume your purge is not hashing properly.  When you purge it has to
> match whatever it hashed on when the obj went into the cache.
>
>
>
> I have problems using the standard sub vcl_hash so I hash only on the URL
> and not the hostname so this let's me purge from outside of the "restricted
> area."
>
>
>
>
>
> In your case I think you probably need to purge all possibilities based on
> that X-header you are setting.
>
>
>
> If that gets too difficult I fallback on doing a BAN instead.
>
>
>
>
>
> Ray
>
>
>
> On Thu, Mar 6, 2014 at 5:57 PM, Paul McInerney <
> Paul.McInerney at faredge.com.au> wrote:
>
> Hi all,
>
>
>
> We are currently developing a mobile android/iphone app for our website.
>
> When the app hits the varnish frontend, it has the user-agent string set
> as 'mobileapp'.
>
> So I have put in place a subroutine that correctly identifies the app and
> sets a
> custom x-device header to send to the backend for rendering the page(s)
> in the
>
> required format.
>
> This part is working well with the same URL now serving both formats of
> the page,
>
> however when I issue a purge against the URL, it purges the cached
> versions of the
>
> PC version of the page, and doesn't clear all variants (which should
> include the mobileapp
>
> version afaik )
>
> Here's the subroutine called from vlc_recv
>
> sub identify_device {
>         unset req.http.X-UA-Device;
>         set req.http.X-UA-Device = "pc";
>
>  if (req.http.User-Agent ~ "mobileapp" ) {
>         set req.http.X-UA-Device = "mobileapp";
>   }
> }
>
> and the hash being set based on device
>
> sub vcl_hash {
>     if (req.http.X-UA-Device) {
>         hash_data(req.http.X-UA-Device);
>     }
> }
>
> What am I doing wrong? or missing? or not understanding?
>
>
>
> Cheers,
>
>
>
> J
>
>
>
> --
>
> *Paul McInerney*
>
> Senior Systems Administrator
>
> Far Edge Technology
>
>
>
> P:   +61 2  8425 1410
>
> F:   +61 2  8425 1489
>
> M: +61 411 288 030
>
> E:   paul.mcinerney at faredge.com.au
>
>
>
>
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>
>
>
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