Re: Publication date

[ghislain\.cussonneau]

The external proxy cache will be used only in anonymous access because of the problem inconstent cache. Most off the sites are anonymous access. So in the file "declarations.inc", I've had this. But I don't know how-to calculate the dLastPublicationTime date.

// Definition des headers en fonction des droits des utilisateurs

// Si on est en anonyme --> utilisation du cache Apache

logger.debug("Page " + jData.page().getID() + " (" + jData.page().getTitle() + ")");

if (!jData.gui().isLogged())

{

int iCacheMaxExpire = 24*3600;

Date dExpires = new Date();

dExpires.setTime(dExpires.getTime() + iCacheMaxExpire);

Date dLastPublicationTime = new Date();    // <--- How to calculate this date ?

logger.debug("Header Expires = " + getDateAsRFC822String(dExpires));

logger.debug("Header Last-Modified = " + getDateAsRFC822String(dLastPublicationTime));

logger.debug("Header Cache-Control = " + "max-age=" + iCacheMaxExpire + ", must-revalidate");

response.addHeader("Expires", getDateAsRFC822String(dExpires));

response.addHeader("Last-Modified", getDateAsRFC822String(dLastPublicationTime));

response.addHeader("Cache-Control", "max-age=" + iCacheMaxExpire + ", must-revalidate");

}

// Autrement --> pas de cache Apache

else

{

Date dExpiresAbsolute = new Date();

dExpiresAbsolute.setTime(dExpiresAbsolute.getTime() + 86400);

logger.debug("Header Cache-Control = no-cache");

logger.debug("Header Pragma = No-Cache");

logger.debug("Header ExpiresAbsolute = " + getDateAsRFC822String(dExpiresAbsolute));

logger.debug("Header Expires = -1");

response.addHeader("Cache-Control", "no-cache");

response.addHeader("Pragma", "No-Cache");

response.addHeader("ExpiresAbsolute", getDateAsRFC822String(dExpiresAbsolute));

response.addHeader("Expires", "-1");

}

---

Mmmh it risks to be a bit less trivial than that.... Content may be reused on several pages (so you can't simply flush the current page). Moreover, on the same page, you can have various different permissions. etc, etc... So replacing the current jahia HTML cache by an external cache proxy is not so simple and rapidly your cache proxxy will become inconsistent. We are now working for Jahia 5.0 on a new full cache server which will be compliant with the ESI standard (= you can manage HTML fragments on a page and not only full pages). Meanwhile it seems to me more easy to just embed some JSP cache taglibs (cf OSCache HTML tags for instance) in your set of templates rather than trying to configure an external cache proxy. Cheers, Stéphane At 11:22 25.11.2005, ghislain\.cussonneau wrote: Hi !   I use Jahia 4.0.6 and I want to use the apache cache server in front-off Jahia for the HTML content. To do that, Jahia need to send some Http Headers to Apache : - Expires : (now + cache_max_expire_constant) date in rfc822 format - Last-Modified : last publication date in rfc822 format - Cache-Control : max-age=cache_max_expire_constant, must-revalidate - ExpiresAbsolute : (nom + 24 hours) in rfc822 format   My problem is about calculate the "Last-Modified" date : I want to use the date of the publication of the page in the workflow.   Is it possible with Jahia 4.0.6, because I can't find in Jahia API how to get it ? Which version of Jahia do I need to use ?   Thanks in advance   Ghislain CUSSONNEAU DIRR/DPIL/CIS CAP 44, Rue Marcel Sembat 44000 Nantes 02 51 84 48 80 Accédez au courrier électronique de La Poste : www.laposte.net ; 3615 LAPOSTENET (0,34 /mn) ; tél : 08 92 68 13 50 (0,34/mn) - -- --- -----=[ scroisier at jahia dot com ]=---- --- -- - CEO - Jahia Ltd, 45 rue de la gare, 1260 Nyon (Switzerland) Jahia : The Java Unified Web Platform www.jahia.org - The community and product web site www.jahia.com - Our commercial services company www.collaborativesource.org - The Collaborative Source Initiative

 

 

Ghislain CUSSONNEAU

DIRR/DPIL/CIS

CAP 44, Rue Marcel Sembat

44000 Nantes

02 51 84 48 80

CRIL Technology

Technoparc de l'Aubinière

44000 Nantes

02 51 89 64 50

Accédez au courrier électronique de La Poste : www.laposte.net ;

3615 LAPOSTENET (0,34 /mn) ; tél : 08 92 68 13 50 (0,34/mn)