Description

The NoFollow plugin adds support for searching through hyperlinks in comments and trackbacks and adding rel="nofollow" for hyperlinks without this attribute. This removes any search engine ranking that comment/trackback spammers might hope to get from leaving comment/trackback spam on your blog.

Further description of this attribute can be found on this Google Blog post, Preventing comment spam.

Availability

This plugin is available as of blojsom 2.23.

Installation and Setup

In your /WEB-INF/classes/blojsom-plugins.xml file, add the following:

<bean id="nofollow" class="org.blojsom.plugin.nofollow.NoFollowPlugin" init-method="init" destroy-method="destroy"/>

You may then add "nofollow" to one of the flavor-based plugin chains.

Usage and URL Parameters

The plugin works by searching over the text in the comments and trackbacks searching for hyperlinks. If a hyperlink is found without the rel="nofollow" attribute is added. If a hyperlink is found with the rel attribute but not nofollow, nofollow is added to the rel attribute.