Issue while integrating custom taglibs in Freemarker template

[Abutalib Shaikh]

Hello all,
We are facing problem while integrating custom tag library in freemaker template.
We are using Jforum2.1.8 , Tomcat 7 and freemarker-2.3.9 in our development environment.
The configuration of .tld file as

<?xml version="1.0" encoding="UTF-8"?>
<taglib version="2.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd">
  <!--  -->
    <description>
       Social Sharing tag library.
    </description>
    <display-name>Social Sharing Taglib</display-name>
    <tlib-version>1.0</tlib-version>
    <short-name>forms</short-name>
    <uri>/WEB-INF/taglibs/social-sharing</uri>
    <tag>
        <description>
            Display Social Icons.
        </description>
        <name>SocialSharingButton</name>
        <tag-class>com.social.tags.SocialSharingButtonTag</tag-class>
        <body-content>JSP</body-content>
        <attribute>
            <name>service</name>
            <required>true</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>url</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>countEnabled</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>text</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>summary</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>source</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>status</name>
            <required>false</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>
        <attribute>
            <name>label</name>
            <required>true</required>
            <rtexprvalue>true</rtexprvalue>
        </attribute>   
    </tag>
</taglib>

Here is code that we added to the net.jforum.JForum class in the "service" method.

                    context.put(FreemarkerServlet.KEY_JSP_TAGLIBS, new TaglibFactory(this.getServletContext()));
					DefaultObjectWrapper wrapper = new DefaultObjectWrapper();
					context.put(FreemarkerServlet.KEY_APPLICATION, new ServletContextHashModel(this, wrapper));
					context.put(FreemarkerServlet.KEY_REQUEST, new HttpRequestHashModel(req, res, wrapper));

We include taglibs as follow in template file

<#assign social=JspTaglibs["/WEB-INF/taglibs/social-sharing"]/>

But we got following error logs while running sever.

Document root element "taglib", must match DOCTYPE root "null".
Document is invalid: no grammar found.

Is there any step we missing for configuration of taglibs? or Is there any alternate way to configuration of taglibs? Please Suggest.
Thanks in Advance

[Tim Moores]

I haven't tried integrating taglibs with JForum, but one thing you should definitely do is to switch to the latest released version, which is 2.4.1. It's on SourceForge under the name jforum2. JForum 2.1.8 has too many unfixed bugs and security problems to be used still.