Re: [IUG] RSS feeds and WebPAC screens - huh?

["Fifarek, Aimee" <afifarek at scottsdaleaz dot gov>]

Bob - now I understand.  It never occurred to me that the webpac page
would be acting like a feed aggregator and obeying the TTL setting.  But
that does explain why the raw feed (viewed through IE7) shows new items
first thing in the morning but the WebPAC page might not show those new
items until sometime in the afternoon.  Oh, will the mysteries never
cease! - Aimee

Aimee Fifarek
Scottsdale Public Library
480-312-7060

-----Original Message-----
From: innopac-bounces at innovativeusers dot org
[mailto:innopac-bounces at innovativeusers dot org] On Behalf Of Bob Duncan
Sent: Wednesday, April 22, 2009 11:24 AM
To: IUG INNOPAC List
Subject: Re: [IUG] RSS feeds and WebPAC screens - huh?

At 04:55 PM 4/21/2009, Aimee wrote:
>Bob - your email makes me feel less bad about being confused about
this.
>Actually the feed itself is fine - I'm trying to figure out why the
>WebPAC page that displays the feed isn't updating even after I've
edited
>the HTML.

Yeah, I got that part.  When the WebPAC serves a feed the WebPAC is 
functioning like a feed aggregator, and the TTL value in the feed 
exists to tell aggregators how long to wait before checking back, in 
combination with -- I think -- the lastBuildDate value in the feed.

The WebPAC page that displays the feed is the output of the 
aggregator...which has been told by the feed to wait 720 minutes 
before checking back.  Editing the HTML on the WebPAC page won't have 
any immediate effect on what displays since the aggregator is holding 
off checking the feed for the TTL period (which is either the minimum 
set with the wwwoption, or an explicit value set in the feed's ttl
element).

FWIW, I now see 20 items on the WebPAC page that displays the 
contents of your newmusic feed.

Bob Duncan


~!~!~!~!~!~!~!~!~!~!~!~!~
Robert E. Duncan
Systems Librarian
Editor of IT Communications
Lafayette College
Easton, PA  18042
duncanr at lafayette dot edu
http://library.lafayette.edu/ 

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