[wp-hackers] transients and caching on your own

Sat Jan 25 19:22:54 UTC 2014

Thank you Nikola. What you wrote makes total sense.

On Sat, Jan 25, 2014 at 10:39 AM, Nikola Nikolov <nikolov.tmw at gmail.com>wrote:

> Hi Haluk,
>
> I believe that the action hook you're looking into would be
> wp_loaded<http://codex.wordpress.org/Plugin_API/Action_Reference/wp_loaded
> >
> -
> the glance at the Action
> Reference<http://codex.wordpress.org/Plugin_API/Action_Reference>
> shows
> that this is the last hook before the
> parse_request<
> http://codex.wordpress.org/Plugin_API/Action_Reference/parse_request
> >action
> - which happens after WordPress completes it's request
> parsing(basically when it goes through the permalinks[if they are enabled]
> and finds a matching pattern and fills the query parameters).
>
> That also seems like the place to start your output buffer in order to save
> the outputted HTML and there you can add your action that would complete
> the output buffering and save it in the transient. I *think* the hook you'd
> be looking forward for that would be
> shutdown<http://codex.wordpress.org/Plugin_API/Action_Reference/shutdown>
> .
>
> Other than that I don't think there's anything else you need(hook-wise).
> You might want to do some checks on the output that you're storing just to
> make sure it's not incorrect(maybe see if it's empty or not), but I don't
> know if it's worth to make more complex checks - like to see if the HTML is
> properly formed(so that you're not missing the <html></html> tags for
> instance), but if something goes wrong it might be a good idea to have some
> kind of a fail-safe.
>
>
> On Sat, Jan 25, 2014 at 8:23 PM, Haluk Karamete <halukkaramete at gmail.com
> >wrote:
>
> > Hey Hackers,
> >
> > Say there is a URL such as http://www.domain.com/pageX.
> > Say that URL happens to be a magazine/news like URL and has a ton of
> cross
> > taxonomy queries and runs over 100 queries blah blah. The point is that
> the
> > page is very loaded.
> >
> > And this page happens to attract a ton of traffic.
> > To top it off, there are a few more URLs like that throughout the site.
> >
> > Total cache, super cache is not an option for me. Due to their complex
> > configs and weirdo behaviors, I confidently say, that they will never be
> > part of my wordpress work. Their too many features introduce more
> problems
> > than they solve. I'm done with them.
> >
> > So, I am looking for a 80/20 solution that addresses my main need - by
> > building my own. With the right guidance, this should take less than a
> day.
> >
> > I'm not looking for an elaborate solution, like those that have 100+
> > features, settings and more...
> >
> > All I want is this:
> >
> > have a piece of code like this ( the question I will be asking you later
> is
> > WHERE THIS CODE SHOULD GO ) and run it in the right hooks.
> >
> > $cached_urls= array(
> >         'url_1' => 'num_of_secs_to_cache|my_filter_function_name',
> >         'http://www.domain.com/pageX'   => '60*60|xyx_my_filter',
> > );
> > handle_my_cache($cached_urls);
> >
> > in this array, left side needs no explanation.
> > right side though has a separator (|) and I use that to visually split
> the
> > data (expire time and filter ).
> >
> > The array is pretty visual and tells what's happening at a glance.
> >
> > The plan is to store the URLs' corresponding HTMLs (all the way from
> > <!doctype html> to </html>) in a transient - where the transient ID is
> made
> > up on the fly from the URL associated with it. That I can do without a
> > sweat.
> >
> > What I'd like to get an insight from a master like you is that where this
> > piece of code should go?
> >
> > I need an action hook as early as possible but after wordpress loaded the
> > transient API, & it knows about the current user login status.
> >
> > I sense that location would be template_redirect. Am I right?
> > But on the other hand, at that time, wordpress would have already run the
> > main query which is no use to me, because I already got the HTML in a
> > transient (which includes the results of that main query too) So, there
> is
> > a waste in there...
> > So, Is it the "pre_get_posts" hook that I should go after... See my
> issue?
> >
> > Once we plug the code in the right place, the "handle_my_cache();"
> function
> > to take over and do its thing.
> >
> > which is mainly,
> > * check if the current user is logged in, and if so,
> > exit out and let WordPress run its course.
> >
> > * check if the transient is alive and if so,
> > load it and prevent from WordPress taking its further course.
> >
> > * and if the transient is not alive, let WordPress run its course,
> > but at the end, let the transient be created for the next time around.
> >
> > Could you guide me which hook(s) do I need here?Thank you for your time
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