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ObfuscateExternalLinks

To create a new cookbook entry, fill in or remove the sections below.

obfuscate.zip

Goal

The goal of this add-on is to replace external urls by an obfuscated form. This should avoid/limit spam on wiki pages: the url won't appear in the page

Solution

The FmtUrlLink function is replaced. Each link is replaced by a string made of the hexadecimal value of each characters of the urls. Then the url is replaced by a redirection script able to decode this string.

for example, on my wiki, the following link:

http://www.pmwiki.org/wiki/CookBook/HomePage

is replaced by:

http://mywebsite/pmwiki/redirect.php?link=687474703a2f2f7777(approve links)....

Discussion

• Copy the hide_external_link.php file into yout local directory. Copy the redirect.php script to a place where it is accessible (your pmwiki directory).
• Edit your local/config.php file, add the following lines:

  $UrlWhiteList[] = 'www.your.site.web';
  $UrlWhiteList[] = 'www.othersite';
  $UrlWhiteList[] = 'www.pmwiki.org';
  $UrlWhiteList[] = 'www.pmichaud.com';

  $RedirectionScriptUrl='http://www.your.site.web/pmwiki/redirect.php(approve links)';
  include_once("local/hide_external_links.php");

• the UrlWhiteList array contains names of website that should not be obfuscated.
• $redirectionScriptUrl is the url of the redirection script

See Also

History

• 18 June 2004: Creation
• 18 June 2004: 2nd version, no more modification to pmwiki.php is needed
• 21 June 2004: Compacter url coding used

Comments & Bugs

• TODO: The white list could be loaded from a file or better, a wiki page.
• BUG: ?? Some of the links being obfuscated are having their last letter changed.

Contributors

• Gregory Watts (http://www.greg-tools.com/contact/contact.php(approve links))

Copyright

pmwiki-2.2.0-beta68 -- Last modified by {{Gregory}}?

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