How to add filter in a portal extension

[tim.drisdelle]

I have successfully created a custom portal extension "my-portal-extension", and I want to add a filter that will process on <url-mapping>/*</url-mapping>

The MyFilter.jar is places in my-portal-extension/WEB-INF/lib/

While I can see the filter is initialized (via log messages), it doesn't get called when I visit the portal:

http://myserver.com:8080/portal/

It does get into the doFilter method if I visit:

http://myserver.com:8080/my-portal-extension/

But obviously this isn't intended. Clearly, the Tomcat context for the portal extension (which is deployed as a "separate" webapp my-portal-extension.war), uses its own context (ie. /my-portal-extension) and will not filter for a different context (ie. /portal), which is what I actually want.

How do I add a filter to my portal extension?

[nscavell]

/google "gatein filter" -> results[0] = https://community.jboss.org/thread/172870

[tim.drisdelle]

Wow - I guess my Google chops are in need of tuning (too verbose!)

Thanks for the thread, I'll go check it out!

[tim.drisdelle]

Alright...

I've followed the direction on the referenced thread and I think I've got everything working.

However, I'm not able to read in my init-params from the configuration in web-inf-extension-configuration.xml

These params used to be in my web.xml file, and now I've got them like this:

<init-params>

        <properties-param>

          <name>authfilter.properties</name>

          <property name="APP_ID" value="1234"/>

          <property name="APP_ID_KEY" value="aaabbbcccddd111222333444"/>

          <property name="APP_ADMIN_PASSWORD" value="abcde12345"/>

        </properties-param>

        <object-param>

          <name>Auth Filter Definition</name>

          <object type="org.exoplatform.web.filter.FilterDefinition">

            <!-- The filter instance -->

            <field name="filter">

              <object type="com.mycompany.authfilter.AuthFilter"/>

            </field>

            <!-- The mapping to use -->

            <!-- WARNING: the mapping is expressed with regular expressions -->

            <field name="patterns">

              <collection type="java.util.ArrayList" item-type="java.lang.String">

                <value>

                  <string>/.*</string>

                </value>

              </collection>

            </field>

          </object>

        </object-param>

      </init-params>

I'm not sure I've done this correctly, and when my filter tries filterConfig.getInitParameter("APP_ID") it throws NPE.

Am I supposed to use a different <name> in the <properties-param> ?

I just noticed that the interface org.exoplatform.web.filter.Filter does not include methods for init and destroy, which I was using to populate my FilterConfig (and contained the properties).

[mposolda]

Hi,

I think that you need to create constructor of your filter, which will just accept InitParams as the argument and read parameters here. Something like

{code}

public MyFilter implements Filter

{

  public MyFilter(InitParams params)

  {

     params.getPropertiesParam('APP_ID');

     // Read other parameters here

  }

  ...

}

{code}