nutch-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sebastian Nagel (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (NUTCH-2581) Caching of redirected robots.txt may overwrite correct robots.txt rules
Date Fri, 08 Jun 2018 09:53:00 GMT

     [ https://issues.apache.org/jira/browse/NUTCH-2581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sebastian Nagel resolved NUTCH-2581.
------------------------------------
    Resolution: Fixed

Fixed in 1.x and 2.x. Although this usually rarely happens, it's important to ensure politeness.
See also [storm-crawler#573|https://github.com/DigitalPebble/storm-crawler/issues/573].

> Caching of redirected robots.txt may overwrite correct robots.txt rules
> -----------------------------------------------------------------------
>
>                 Key: NUTCH-2581
>                 URL: https://issues.apache.org/jira/browse/NUTCH-2581
>             Project: Nutch
>          Issue Type: Bug
>          Components: fetcher, robots
>    Affects Versions: 2.3.1, 1.14
>            Reporter: Sebastian Nagel
>            Assignee: Sebastian Nagel
>            Priority: Critical
>             Fix For: 2.4, 1.15
>
>
> Redirected robots.txt rules are also cached for the target host. That may cause that
the correct robots.txt rules are never fetched. E.g., http://wyomingtheband.com/robots.txt
redirects to https://www.facebook.com/wyomingtheband/robots.txt. Because fetching fails with
a 404 bots are allowed to crawl wyomingtheband.com. The rules is erroneously also cached for
the redirect target host www.facebook.com which is clear regarding their [robots.txt|https://www.facebook.com/robots.txt]
rules and does not allow crawling.
> Nutch may cache redirected robots.txt rules only if the path part (in doubt, including
the query) of the redirect target URL is exactly {{/robots.txt}}.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message