[jira] [Resolved] (NUTCH-1752) cache robots.txt rules per protocol:host:port

["Sebastian Nagel (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NUTCH-1752?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sebastian Nagel resolved NUTCH-1752.
------------------------------------

       Resolution: Fixed
    Fix Version/s:     (was: 2.4)
                   1.9
                   2.3

Committed to trunk and 2.x, r1594071. Thanks, [~amuseme.lu] and [~jnioche], for reviewing!

> cache robots.txt rules per protocol:host:port
> ---------------------------------------------
>
>                 Key: NUTCH-1752
>                 URL: https://issues.apache.org/jira/browse/NUTCH-1752
>             Project: Nutch
>          Issue Type: Bug
>          Components: protocol
>    Affects Versions: 1.8, 2.2.1
>            Reporter: Sebastian Nagel
>            Assignee: Sebastian Nagel
>             Fix For: 2.3, 1.9
>
>         Attachments: NUTCH-1752-v1.patch, NUTCH-1752-v2.patch
>
>
> HttpRobotRulesParser caches rules from {{robots.txt}} per "protocol:host" (before NUTCH-1031 caching was per "host" only). The caching should be per "protocol:host:port". In doubt, a request to a different port may deliver a different {{robots.txt}}. 
> Applying robots.txt rules to a combination of host, protocol, and port is common practice:
> [Norobots RFC 1996 draft|http://www.robotstxt.org/norobots-rfc.txt] does not mention this explicitly (could be derived from examples) but others do:
> * [Wikipedia|http://en.wikipedia.org/wiki/Robots.txt]: "each protocol and port needs its own robots.txt file"
> * [Google webmasters|https://developers.google.com/webmasters/control-crawl-index/docs/robots_txt]: "The directives listed in the robots.txt file apply only to the host, protocol and port number where the file is hosted."



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