Cronjob functionality
Two new plugins have been added to CVS by me:
serendipity_event_metadesc / "HTML META-Tags" allows you to define meta-description and meta-keywords per entry. Those will then be shown on the detailed entry page within the HTML head. As a nice bonus, if you leave the fields empty, the plugin tries to auto-detect keywords and description based on your text. For that it evaluates Bold/Strong tags in HTML to auto-guess your content.
serendipity_event_cronjob / "Cronjob scheduler" finally offers some cronjob functionality that people have sometimes requested. A lengthy explaination of this plugin follows. :-)
For anyone that does not know what "Cronjobs" are: This is a service, one of the UNIX/LINUX server oldies, that permanently runs on a webserver and executes scheduled scripts at a given time/period. With this you can setup repetitive tasks, like to purge all your SPAM E-Mails every day.
Now, such cronjobs usually require you to have administrative privileges on the server where it is operated on. The Cron Daemon needs to run all the time, because only then it can execute a job at the exact configured time. Now a common use some people want is: "Fetch my E-Mail account every day to see if there are mails that shall get blogged!".
If you only own a usual PHP webspace, this will get problematic. You cannot create cronjobs there, and since PHP only gets activated when someone visits your blog, you can't really say "Execute this script at 00:00", because you don't know if your script is called at that time. This is the reason, why "cronjobs" are usually not encouraged to use on a PHP-basis.
The best way it can be emulated is like this: Every page call to your serendipity Blog can contain an invisible image that your visitors call again and again, and each time the script is called, it calculates the difference between the last script call and will then check which cronjobs need to be executed.
If your blog is low on visitors, this means that maybe a cronjob that is scheduled every 5 minutes would only get executed once an hour. There's nothing you can really do about that, unless you own a server were you can create a remote cronjob that calls WGET or similars on your URL, to fake regular visits to your blog.
Now that the principle bheind this is clear, here's what the cronjob plugin does: It emits exactly the invisible picture, and servers up multiple plugin API hooks that other plugins can use. Currently, only the popfetcher (1.13) and aggregator (0.7) plugins support cronjobs. Once you have the cronjob plugin installed you can configure these plugins inseid their own configuration to be executed on the available cronjobs.
Feedback about this functionality is appreciated. Be warned that this script of course creates extra requests to your blog. So if there's any way for you to setup "real" cronjobs, you are advised to do so.
i have some warnings when using html-meta tags plugin. basically it works (there are meta fields in extended entry head section) but i also fet mentioned warnings:
Warning: array_keys() [function.array-keys]:
The first argument should be an array in
/home/costa/public_html/plugins/
serendipity_event_metadesc/serendipity_event_metadesc.php on line 162
Warning: implode() [function.implode]:
Bad arguments. in
/home/costa/public_html/plugins/
serendipity_event_metadesc/serendipity_event_metadesc.php on line 162
http://www.webcron.org/
It HTTP-GETs a file from your server on the specified time.
Im using this service for over 3 Years now, and im very happy. Support them by linking to them and you get bonuspoints for additional Cronjobs + automatic logfiledeleting. Although it only has a timeout of 30 Seconds right now, with the right scriptconfiguration it is unbeaten. Unless you own a server :)
Can s. do this? I had to ask here, as the forum won't let me in. Thanks.
Mark
Anyway, there is an Option in the Admins Configuration Menu, which enables "embedded using" of s9y. The description says:
"If you want to embed serendipity within a regular page, set to true to discard any headers and just print the contents. You can make use of the indexFile option to use a wrapper class where you put your normal webpage headers. See the README file for more information!"
Maybe this can help you.
I think I may *finally* be permitted to login to the forum, which is good, as I found a bug.
Nadrabiam zaległości w temacie mojego bloga i jego engine ale chyba lekko za developerami nie nadążam :). Kolejny plugin, który sobie lokalnie przetestowałem i który po prostu działa jak należy i robi dokładnie to, do czego został stworzony. A do czego zo
Tracked: Jul 06, 23:37