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https://issues.apache.org/jira/browse/NUTCH-706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851923#action_12851923
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Ken Krugler commented on NUTCH-706:
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Two comments about this:
1. From my experiences with Nutch & Bixo, I think that URL normalization
ultimately needs to be more structured - ie first break the URL into pieces,
then apply rules against the pieces. Trying to craft regular expressions to
handle target cases leads to big, hairy, hard-to-understand strings.
2. URL normalization is something that makes a lot of sense for
crawler-commons. If somebody from the Nutch side wants to define a target API,
I could look at porting existing Bixo code to crawler-commons.
> Url regex normalizer
> --------------------
>
> Key: NUTCH-706
> URL: https://issues.apache.org/jira/browse/NUTCH-706
> Project: Nutch
> Issue Type: Bug
> Affects Versions: 1.0.0
> Reporter: Meghna Kukreja
> Priority: Minor
>
> Hey,
> I encountered the following problem while trying to crawl a site using
> nutch-trunk. In the file regex-normalize.xml, the following regex is
> used to remove session ids:
> <pattern>([;_]?((?i)l|j|bv_)?((?i)sid|phpsessid|sessionid)=.*?)(\?|&|#|$)</pattern>.
> This pattern also transforms a url, such as,
> "&newsId=2000484784794&newsLang=en" into "&new&newsLang=en" (since it
> matches 'sId' in the 'newsId'), which is incorrect and hence does not
> get fetched. This expression needs to be changed to prevent this.
> Thanks,
> Meghna
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