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00563: Don't show ?action= links to web spiders/robots

Description: Currently when a web spider such as Googlebot, Yahoo! Slurp, or others visit a PmWiki site, they tend to follow all of the ?action= links on a page (including ?action=edit, ?action=diff, etc.).

PmWiki's default configuration provides a <meta> tag to tell robots not to index pages when ?action= is specified in the link, however by the time this occurs the server has already incurred the expense of generating the page and sending it to the robot.

Pm proposes a module that detects when a robot is retrieving a page, and strips all "?action=" parameters from page links within the page. This prevents robots from seeing the ?action= links in the first place, reducing server overhead and bandwidth.

Comments?

1. Stripping the action when a robot arrives is a good idea, I add a rel=nofollow to the edit link. Works for google my best friend
2. some action should be excluded from exclusing
   1. browse ( :) )
   2. rss
   3. dc
3. Some aftercare is needed as well, what to do when a robot arrives using a ?action= link ( most indexes already have a lot of links in the databases, or a robot may arrive via an external page (like site stats). On my site I return a 401 (Unauthorized) whenever a robot arrives.
4. List of robots I catch at the moment
   • slurp
   • googlebot
   • mediapartners
   • xenu
   • grub
   • ingrid
   • baiduspider
   • metaweb
   • nutch
   • aipbot
   • societyrobot
   • teoma
   • zoekybot
   • gigabot
   • yahoo
   • vagabondo
   • msnbot
   • mirago
   • omni
   • zyborg
   • (and a bunch in robots.txt and .htaccess)

good luck BrBrBr