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Posted to dev@nutch.apache.org by "Markus Jelsma (JIRA)" <ji...@apache.org> on 2013/01/13 12:06:12 UTC
[jira] [Assigned] (NUTCH-1257) Support for the x-robots-tag HTTP
Header
[ https://issues.apache.org/jira/browse/NUTCH-1257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Markus Jelsma reassigned NUTCH-1257:
------------------------------------
Assignee: Markus Jelsma
> Support for the x-robots-tag HTTP Header
> ----------------------------------------
>
> Key: NUTCH-1257
> URL: https://issues.apache.org/jira/browse/NUTCH-1257
> Project: Nutch
> Issue Type: New Feature
> Components: fetcher
> Reporter: Mike
> Assignee: Markus Jelsma
> Labels: http,, privacy,, robots,
> Fix For: 1.7, 2.2
>
>
> Google and Bing both currently support the x-robots-tag HTTP header. This is important, because they have a policy of not *crawling* links that are in a robots.txt file, and not *indexing* links that are set to noindex. In the case that a page is indexed but not crawled, Google and Bing will show the page in their results, but it will lack a snippet (since they didn't crawl it, they can't generate one).
> As a result, the only way to block Google and Bing from having a page in their index is to use the robots meta tag in HTML pages and the x-robots-tag in other mimetypes.
> As a site owner that needs to keep specific pages private, I *cannot* trust robots.txt to keep my pages out of Google and Bing, and I have to use the two robots standards. Since Nutch doesn't support the HTTP header, I have to block it from crawling ALL non-HTML pages on my site.
> This is not an ideal state of affairs, and it would be great if Nutch supported the x-robots-tag HTTP header.
> I've done more research on this topic on my blog:
> - http://michaeljaylissner.com/blog/support-for-x-robots-tag-http-header-and-robots-HTML-meta-tag
> - http://michaeljaylissner.com/blog/respecting-privacy-while-providing-hundreds-of-thousands-of-public-documents
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