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https://issues.apache.org/jira/browse/NUTCH-2710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16882894#comment-16882894
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Sebastian Nagel commented on NUTCH-2710:
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Hi [~markus17], agreed to normalize before checking external/internal links (if
{{db.ignore.external.links}} resp. {{db.ignore.internal.links}} is true).
- the patch adds just an additional normalization and filtering before the
internal/external link checks. But I guess it's just an incomplete patch? Doing
the normalization and filtering twice seems useless.
- URL filters can be expensive (eg. if there are many regex rules): maybe it's
more efficient to normalize, then skip external/internal links (if configured)
and apply the URL filters only to the remaining links?
> Normalize outlinks before checking for internal or external links
> -----------------------------------------------------------------
>
> Key: NUTCH-2710
> URL: https://issues.apache.org/jira/browse/NUTCH-2710
> Project: Nutch
> Issue Type: Improvement
> Reporter: Markus Jelsma
> Assignee: Markus Jelsma
> Priority: Major
> Fix For: 1.16
>
> Attachments: NUTCH-2710.patch
>
>
> We have a normalizer that transforms external URLs back to internal URLs. But
> those URLs are never passed to the normalizer, because they have already been
> filtered out by internal and/or external host/domain checks in
> parseOutputFormat.filterNormalize().
> This patch proposes to move the normalizers above the checks for
> internal/external hosts/domains.
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