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From "Chris A. Mattmann (JIRA)" <j...@apache.org>
Subject [jira] Commented: (NUTCH-547) Redirection handling: YahooSlurp's algorithm
Date Wed, 07 Nov 2007 20:36:50 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12540884
] 

Chris A. Mattmann commented on NUTCH-547:
-----------------------------------------

+1: without having tested it, it improves an existing significant functionality and since
we're using a CM, we can always revert, so IMO, go ahead and commit since it's been out there
for quite a while.

> Redirection handling: YahooSlurp's algorithm
> --------------------------------------------
>
>                 Key: NUTCH-547
>                 URL: https://issues.apache.org/jira/browse/NUTCH-547
>             Project: Nutch
>          Issue Type: Improvement
>          Components: fetcher
>            Reporter: Doğacan Güney
>             Fix For: 1.0.0
>
>         Attachments: NUTCH-547-3.patch, redirect_draft.patch, redirect_draft_v2.patch
>
>
> After reading Yahoo's algorithm (then one Andrzej linked to:
> http://help.yahoo.com/l/nz/yahooxtra/search/webcrawler/slurp-11.html )
> in the redirect/alias handling discussion, I had a bit of a spare
> time, so I implemented it.
> Note that the patch I am attaching is for the 'choosing' algorithm described in
> Yahoo's help page. It makes no attempt to handle aliases in any way. (See http://www.nabble.com/Redirects-and-alias-handling-%28LONG%29-tf4270371.html#a12154362
for the discussion about alias handling).
> E.g,
> generate "http://www.milliyet.com.tr/"
> fetch "http:/www.milliyet.com.tr/" which redirects to
> "http://www.milliyet.com.tr/2007/08/29/index.html?ver=39".
> Update second page's datum's metadata to indicate that
> "http://www.milliyet.com.tr/" is the representative form.
> Updatedb, invertlinks, etc...
> While indexing second page, change its "url" field to
> "http://www.milliyet.com.tr/".

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