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Apache Nutch 2.3.* - Meta Robots - Plugin

A plugin developed for Apache Nutch 2.3 to honour the robots meta tag at index time. Apache Nutch 2.3 ignores the noindex rule and proceeds to index the content to Solr. This plugin has been developed to discard the document from index if it contains the robots metatag with the associated noindex rule.

Please note: This plugin does NOT remove any documents from your external datastore for index. You'll need to remove any documents previously indexed from your external datastore.

##Usage

Include the metarobots plugin first in the plugin.includes property and specify robots in the index.metadata property.

<property>
    <name>plugin.includes</name>
    <value>metarobots|indexer-solr|scoring-opic|urlnormalizer-(pass|regex|basic)|protocol-(http|https)|urlfilter-regex|parse-(html|metatags|tika)|index-(basic|metadata|more)</value>
</property>

<property>
     <name>index.metadata</name>
     <value>robots</value>
</property>

##How To Build

Before proceeding make sure you have apache ant installed.

In order to use this plugin you'll need to build it into Apache Nutch 2.3.

Follow these steps to ensure your plugin gets built into the runtime folder:

  1. Copy the plugin files to the NUTCH_ROOT/src/plugin folder.

  2. Open NUTCH_ROOT/src/plugin/build.xml and add the following children to the associated target elements:

        <target name="deploy">
        <ant dir="metarobots" target="deploy"/>
    </target>
    
    <target name="test">
        <ant dir="metarobots" target="test"/>
    </target>
    
    <target name="clean">
        <ant dir="metarobots" target="clean"/>
    </target>

    Do NOT overwrite any existing <ant> elements

  3. Open a terminal and navigate to the NUTCH_ROOT directory.

    Enter the following command:

    ant runtime

##Running Tests To test the plugin, open a terminal and navigate to the NUTCH_ROOT/runtime/local directory.

Run the following command:

 sudo bin/nutch indexchecker http://domain.com/metatag-robots-noindex-rule

Ensure the webpage under test contains the robots metatag with the associated noindex rule. Nutch will return Document discarded in the terminal.