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Posted to user@roller.apache.org by Matt Raible <ma...@raibledesigns.com> on 2012/08/10 15:55:27 UTC
Reading Cookies
Is it possible to read cookies in Velocity templates? I know how to do it in JS, but would prefer to do it on the server side.
Thanks,
Matt
Re: Reading Cookies
Posted by Matt Raible <ma...@raibledesigns.com>.
After some testing, I noticed that this is working, but not as good as I'd
hoped. It seems that the cache is kicking in
and $cookies.getCookie("com.raibledesigns.theme") is only getting called
the first time the page loads. Subsequent requests get the page from the
cache, so a new cookie value is never read. I'm guessing there's no way to
disable the cache for a certain portion of the page? If not, is there
anyway to read cookies every time in a page?
Thanks,
Matt
On Sat, Mar 29, 2014 at 8:43 AM, Matt Raible <ma...@raibledesigns.com> wrote:
> Thanks - using this I was able to create a CookieModel plugin:
>
> package org.apache.roller.cookies.plugins.pagemodel;
>
> import java.util.Map;
> import javax.servlet.http.Cookie;
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.jsp.PageContext;
>
> import org.apache.commons.logging.Log;
> import org.apache.commons.logging.LogFactory;
> import org.apache.roller.weblogger.ui.core.RollerSession;
> import org.apache.roller.weblogger.WebloggerException;
> import org.apache.roller.weblogger.ui.rendering.model.Model;
>
> public class CookieModel implements Model {
> private static Log log = LogFactory.getLog(CookieModel.class);
> private HttpServletRequest request = null;
>
> public String getModelName() {
> return "cookies";
> }
>
> public void init(Map params) throws WebloggerException {
> PageContext context = (PageContext)params.get("pageContext");
> this.request = (HttpServletRequest) context.getRequest();
> }
>
> public String getCookie(String cookieName) {
> Cookie[] cookies = request.getCookies();
>
> for (int i = 0; i < cookies.length; i++) {
> String name = cookies[i].getName();
> if (cookieName.equals(name)) {
> return cookies[i].getValue();
> }
> }
>
> log.warn("ERROR: cookie '" + cookieName + "' not found");
> return null;
> }
> }
>
> Then use it in my velocity templates with:
>
> $cookies.getCookie("com.raibledesigns.theme")
>
> To create it, I copied plugins/pluginmodel to plugins/cookieplugin:
>
> /Users/mraible/dev/roller/docs/examples/plugins/cookieplugin
>
> And I had to alter the build.xml quite a bit to get everything to compile:
>
> <project name="cookiemodel" default="dist">
>
> <property name="buildlib" value="../../../../app/target" />
>
> <target name="dist">
> <mkdir dir="build" />
> <mkdir dir="dist" />
> <javac srcdir="src" destdir="build">
> <classpath>
> <pathelement path="${buildlib}/roller-classes.jar" />
> <pathelement
> path="${user.home}/.m2/repository/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar"
> />
> <pathelement
> path="${user.home}/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar"
> />
> <pathelement
> path="${user.home}/.m2/repository/javax/servlet/jsp-api/2.0/jsp-api-2.0.jar"
> />
> </classpath>
> </javac>
> <jar basedir="build" destfile="dist/cookiemodel.jar" />
> </target>
>
> <target name="clean" >
> <delete dir="build" />
> <delete dir="clean" />
> </target>
>
> </project>
>
> Cheers,
>
> Matt
>
>
>
> On Thu, Jan 16, 2014 at 2:24 PM, Dave <sn...@gmail.com> wrote:
>
>> Here's the new one:
>>
>> http://svn.apache.org/repos/asf/roller/trunk/docs/examples/plugins/pluginmodel/
>>
>>
>> On Thu, Jan 16, 2014 at 4:09 PM, Matt Raible <ma...@raibledesigns.com>
>> wrote:
>>
>> > I'm finally getting around to trying to implement reading cookies in my
>> > templates. But the above link doesn't work. Got a new one?
>> >
>> >
>> > On Fri, Aug 10, 2012 at 10:37 AM, Dave <sn...@gmail.com> wrote:
>> >
>> > > On Fri, Aug 10, 2012 at 11:10 AM, Sarwar Bhuiyan
>> > > <sa...@gmail.com> wrote:
>> > > > Something like this
>> > > >
>> > >
>> >
>> http://www.jajakarta.org/velocity/tools/velocity-tools-1.1/docs/view/CookieTool.html
>> > >
>> > > I don't think that will work since we setup Velocity internally within
>> > > our own Servlets.
>> > >
>> > > I think the only way to do this without code changes to Roller is to
>> > > add your own Page Model plugin. In that plugin, you would get the
>> > > cookies and return them via a getter. There is an example of a page
>> > > model plugin here:
>> > >
>> > >
>> > >
>> >
>> http://svn.apache.org/repos/asf/roller/trunk/weblogger-docs/examples/plugins/pluginmodel/
>> > >
>> > > - Dave
>> > >
>> >
>>
>
>
Re: Reading Cookies
Posted by Matt Raible <ma...@raibledesigns.com>.
Thanks - using this I was able to create a CookieModel plugin:
package org.apache.roller.cookies.plugins.pagemodel;
import java.util.Map;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.PageContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.roller.weblogger.ui.core.RollerSession;
import org.apache.roller.weblogger.WebloggerException;
import org.apache.roller.weblogger.ui.rendering.model.Model;
public class CookieModel implements Model {
private static Log log = LogFactory.getLog(CookieModel.class);
private HttpServletRequest request = null;
public String getModelName() {
return "cookies";
}
public void init(Map params) throws WebloggerException {
PageContext context = (PageContext)params.get("pageContext");
this.request = (HttpServletRequest) context.getRequest();
}
public String getCookie(String cookieName) {
Cookie[] cookies = request.getCookies();
for (int i = 0; i < cookies.length; i++) {
String name = cookies[i].getName();
if (cookieName.equals(name)) {
return cookies[i].getValue();
}
}
log.warn("ERROR: cookie '" + cookieName + "' not found");
return null;
}
}
Then use it in my velocity templates with:
$cookies.getCookie("com.raibledesigns.theme")
To create it, I copied plugins/pluginmodel to plugins/cookieplugin:
/Users/mraible/dev/roller/docs/examples/plugins/cookieplugin
And I had to alter the build.xml quite a bit to get everything to compile:
<project name="cookiemodel" default="dist">
<property name="buildlib" value="../../../../app/target" />
<target name="dist">
<mkdir dir="build" />
<mkdir dir="dist" />
<javac srcdir="src" destdir="build">
<classpath>
<pathelement path="${buildlib}/roller-classes.jar" />
<pathelement
path="${user.home}/.m2/repository/commons-logging/commons-logging/1.1.3/commons-logging-1.1.3.jar"
/>
<pathelement
path="${user.home}/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar"
/>
<pathelement
path="${user.home}/.m2/repository/javax/servlet/jsp-api/2.0/jsp-api-2.0.jar"
/>
</classpath>
</javac>
<jar basedir="build" destfile="dist/cookiemodel.jar" />
</target>
<target name="clean" >
<delete dir="build" />
<delete dir="clean" />
</target>
</project>
Cheers,
Matt
On Thu, Jan 16, 2014 at 2:24 PM, Dave <sn...@gmail.com> wrote:
> Here's the new one:
>
> http://svn.apache.org/repos/asf/roller/trunk/docs/examples/plugins/pluginmodel/
>
>
> On Thu, Jan 16, 2014 at 4:09 PM, Matt Raible <ma...@raibledesigns.com>
> wrote:
>
> > I'm finally getting around to trying to implement reading cookies in my
> > templates. But the above link doesn't work. Got a new one?
> >
> >
> > On Fri, Aug 10, 2012 at 10:37 AM, Dave <sn...@gmail.com> wrote:
> >
> > > On Fri, Aug 10, 2012 at 11:10 AM, Sarwar Bhuiyan
> > > <sa...@gmail.com> wrote:
> > > > Something like this
> > > >
> > >
> >
> http://www.jajakarta.org/velocity/tools/velocity-tools-1.1/docs/view/CookieTool.html
> > >
> > > I don't think that will work since we setup Velocity internally within
> > > our own Servlets.
> > >
> > > I think the only way to do this without code changes to Roller is to
> > > add your own Page Model plugin. In that plugin, you would get the
> > > cookies and return them via a getter. There is an example of a page
> > > model plugin here:
> > >
> > >
> > >
> >
> http://svn.apache.org/repos/asf/roller/trunk/weblogger-docs/examples/plugins/pluginmodel/
> > >
> > > - Dave
> > >
> >
>
Re: Reading Cookies
Posted by Dave <sn...@gmail.com>.
Here's the new one:
http://svn.apache.org/repos/asf/roller/trunk/docs/examples/plugins/pluginmodel/
On Thu, Jan 16, 2014 at 4:09 PM, Matt Raible <ma...@raibledesigns.com> wrote:
> I'm finally getting around to trying to implement reading cookies in my
> templates. But the above link doesn't work. Got a new one?
>
>
> On Fri, Aug 10, 2012 at 10:37 AM, Dave <sn...@gmail.com> wrote:
>
> > On Fri, Aug 10, 2012 at 11:10 AM, Sarwar Bhuiyan
> > <sa...@gmail.com> wrote:
> > > Something like this
> > >
> >
> http://www.jajakarta.org/velocity/tools/velocity-tools-1.1/docs/view/CookieTool.html
> >
> > I don't think that will work since we setup Velocity internally within
> > our own Servlets.
> >
> > I think the only way to do this without code changes to Roller is to
> > add your own Page Model plugin. In that plugin, you would get the
> > cookies and return them via a getter. There is an example of a page
> > model plugin here:
> >
> >
> >
> http://svn.apache.org/repos/asf/roller/trunk/weblogger-docs/examples/plugins/pluginmodel/
> >
> > - Dave
> >
>
Re: Reading Cookies
Posted by Matt Raible <ma...@raibledesigns.com>.
I'm finally getting around to trying to implement reading cookies in my
templates. But the above link doesn't work. Got a new one?
On Fri, Aug 10, 2012 at 10:37 AM, Dave <sn...@gmail.com> wrote:
> On Fri, Aug 10, 2012 at 11:10 AM, Sarwar Bhuiyan
> <sa...@gmail.com> wrote:
> > Something like this
> >
> http://www.jajakarta.org/velocity/tools/velocity-tools-1.1/docs/view/CookieTool.html
>
> I don't think that will work since we setup Velocity internally within
> our own Servlets.
>
> I think the only way to do this without code changes to Roller is to
> add your own Page Model plugin. In that plugin, you would get the
> cookies and return them via a getter. There is an example of a page
> model plugin here:
>
>
> http://svn.apache.org/repos/asf/roller/trunk/weblogger-docs/examples/plugins/pluginmodel/
>
> - Dave
>
Re: Reading Cookies
Posted by Dave <sn...@gmail.com>.
On Fri, Aug 10, 2012 at 11:10 AM, Sarwar Bhuiyan
<sa...@gmail.com> wrote:
> Something like this
> http://www.jajakarta.org/velocity/tools/velocity-tools-1.1/docs/view/CookieTool.html
I don't think that will work since we setup Velocity internally within
our own Servlets.
I think the only way to do this without code changes to Roller is to
add your own Page Model plugin. In that plugin, you would get the
cookies and return them via a getter. There is an example of a page
model plugin here:
http://svn.apache.org/repos/asf/roller/trunk/weblogger-docs/examples/plugins/pluginmodel/
- Dave
Re: Reading Cookies
Posted by Sarwar Bhuiyan <sa...@gmail.com>.
Something like this
http://www.jajakarta.org/velocity/tools/velocity-tools-1.1/docs/view/CookieTool.html
?
On Fri, Aug 10, 2012 at 2:55 PM, Matt Raible <ma...@raibledesigns.com> wrote:
> Is it possible to read cookies in Velocity templates? I know how to do it
> in JS, but would prefer to do it on the server side.
>
> Thanks,
>
> Matt