OldPluginCentral is a repository for pre-Nutch 1.3 plugin's. Looking back, it actually contains a wealth of Nutch plugin resources as well as tutorials for building plugins.

Plugin Tutorials

• WritingPluginExample-1.2 - Step-by-step example of how to write a plugin for the current development.
• WritingPluginExample-0.9 - Step-by-step example of how to write a plugin for the 0.9 branch.
• HowToMakeCustomSearch - A custom plugin enabling us to search for the author of a website in our index by his email id. (N.B. This plugin is for Nutch release 1.0)
• Example of writing a custom plugin by Sujitpal
  

Plugins that Come with Nutch (0.9)

In order to get Nutch to use any of these plugins, you just need to edit your conf/nutch-site.xml file and add the name of the plugin to the list of plugin.includes.

• clustering-carrot2 - Online Search Results Clustering using Carrot2's components.
• creativecommons - Support for crawling and searching Creative-Commons licensed content.
• index-basic - Adds url, content and anchor fields to the index.
• index-more - Adds date, content-length, contentType, primaryType and subtype fields to the index.
• languageidentifier - Adds a lang field to the index and allows you to query against it.
• ontology - Helps refine queries based on owl files.
• parse-ext - A wrapper that invokes external command to do real parsing job.
• parse-html - Parses HTML documents
• parse-js - Parses JavaScript
• parse-mp3 - Parses MP3s
• parse-zip - Parses ZIP archives
• parse-mspowerpoint - Parses Microsoft Powerpoint files
• parse-msword - Parses MS Word documents
• parse-msexcel - Parses MS Excel documents
• parse-pdf - Parses PDFs
• parse-rss - Parses RSS feeds
• parse-oo - Parses OpenOffice files
• parse-swf - Parses Shockwave Flash
• parse-rtf - Parses RTF files
• parse-text - Parses text documents
• protocol-file - Retreives documents from the filesystem
• protocol-ftp - Retreives documents through ftp
• protocol-http - Retreives documents through http
• protocol-httpclient - Retreives documents through http and https
• query-basic - Runs queries against content, url and anchor fields
• query-more - Runs queries against date, content-length, contentType, primaryType and subType fields.
• query-site - Runs queries against site field
• query-url - Runs queries against url field.
• urlfilter-prefix
• urlfilter-regex
  

Additional Plugins in Dev Branch (0.8)

• analysis-de
• analysis-fr
• lib-commons-httpclient
• lib-http
• lib-jakarta-poi
• lib-log4j
• lib-lucene-analyzers - Lucene analyzers
• lib-nekohtml - automatic tag balancer
• lib-parsems - parse ms documents framework
• parse-msexcel - Parses MS Excel documents
• parse-mspowerpoint - Parses MS Powerpoint documents
• parse-oo - Parses Open Office and Star Office documents (Extentsions: ODT, OTT, ODH, ODM, ODS, OTS, ODP, OTP, SXW, STW, SXC, STC, SXI, STI)
• parse-swf - Parses Flash SWF files
• microformats-reltag - Adds rel-tag fields to the index and runs queries against them.
• parse-zip