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https://issues.apache.org/jira/browse/DROIDS-109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12975156#action_12975156
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Thorsten Scherler commented on DROIDS-109:
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Actually I am subscribed to the crawler-common ml and was there when the
project had been created. There is not much traffic in that project and it had
been created to have some independent ground between Nutch, Droids (basically
this two at least that had been my impression) and some others.
> Several defects in robots exclusion protocol (robots.txt) implementation
> ------------------------------------------------------------------------
>
> Key: DROIDS-109
> URL: https://issues.apache.org/jira/browse/DROIDS-109
> Project: Droids
> Issue Type: Bug
> Components: core, norobots
> Affects Versions: Graduating from the Incubator
> Reporter: Fuad Efendi
> Fix For: Graduating from the Incubator
>
> Original Estimate: 672h
> Remaining Estimate: 672h
>
> 1. Googlebot and many others support query part rules; Droids currently
> supports only URI.getPath() (without query part)
> 2. %2F represents "/" (slash) character inside a path; it shouldn't be
> decoded before applying rule
> 3. Double decoding is used by NoRobotClient.isUrlAllowed(URI uri) (method
> body; baseURI.getPath(); returns decoded string; then we call another
> URLDecoder.decode(path, US_ASCII);
> 4. URLDecoder.decode(path, US_ASCII); - UTF-8 must be used!
> 5. The longest matching directive path (not including wildcard expansion)
> should be the one applied to any page URL
> 6. Wildcard characters should be recognized
> 7. Sitemaps
> 8. Crawl rate
> 9. BOM sequence is not removed before processing robots.txt
> (http://unicode.org/faq/utf_bom.html, bytes: 0xEF 0xBB 0xBF
> and most probably many more defects (Nutch & BIXO haven't done it in-full
> yet). I am working on it right now...
> Some references:
> http://nikitathespider.com/python/rerp/
> http://en.wikipedia.org/wiki/Uniform_Resource_Identifier
> http://www.searchtools.com/robots/robots-txt.html
> http://en.wikipedia.org/wiki/Robots.txt
> Referenced (even by Google!) http://www.robotstxt.org/wc/norobots-rfc.html
> seems at least outdated...
> Proper reference: http://www.robotstxt.org/norobots-rfc.txt (1996).
> We need WIKI page explaining all rules implemented by Droids; hopefully it
> will become unofficial standard.
> *Update from Google:*
> http://code.google.com/web/controlcrawlindex/
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