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https://issues.apache.org/jira/browse/NUTCH-2144?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris A. Mattmann resolved NUTCH-2144.
--------------------------------------
    Resolution: Fixed

OK all fixed thanks [~thammegowda]!

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> Plugin to override db.ignore.external to exempt interesting external domain 
> URLs
> --------------------------------------------------------------------------------
>
>                 Key: NUTCH-2144
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2144
>             Project: Nutch
>          Issue Type: New Feature
>          Components: crawldb, fetcher
>            Reporter: Thamme Gowda N
>            Assignee: Chris A. Mattmann
>            Priority: Minor
>             Fix For: 1.12
>
>         Attachments: ignore-exempt.patch, ignore-exempt.patch
>
>
> Create a rule based urlfilter plugin that allows focused crawler 
> (db.ignore.external.links=true) to fetch static resources from external 
> domains.
> The generalized version of this: This plugin should permit interesting URLs 
> from external domains (by overriding db.ignore.external). The interesting 
> urls are decided from a combination of regex and mime-type rules.
> Concrete use case:
>   When using Nutch to crawl images from a set of domains, the crawler needs 
> to fetch all images which may be linked from CDNs and other domains. In this 
> scenario, allowing all external links and then writing hundreds of regular 
> expressions is not feasible for large number of domains.



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