This module is an extension moving forward from 'Pathologic'
http://drupal.org/project/pathologic
By Garrett Albright
Pathologic assists in keeping site links together when moving or migrating them, but doesn't actually fix the root of the problem - invalid links.
Pathologic repairs links by way of an output filter, repairing a site in a just-in-time manner. These results are (usually) cached, so the end result is good enough BUT it would be better to eliminate the errors once-and-for-all in the first place.
This is what pathologic_repair attempts to do.
It uses the pathologic link-rewriting features to find problems, but once found it will wrote back the fixed version into the database, so errors never need be repaired again.
It also includes a few extra utilities that will globally repair changes to the files database, and embedded links to those files.
Use Case
You have developed a working site on a local machine http://localhost/drupal/ but because you kept a few of the default settings, all your images are being
stored and served out of the path:
http://localhost/drupal/sites/default/files/images/img.gif
When creating the site, (maybe using a WYSIWYG editor) links to those images are now coded into your content as either the 'fully justified' URL above, or possibly as just /drupal/sites/default/files/images/img.gif
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