Server-side fusker software extracts content (e.g. image or video) from its original location and displays it in a new page on the client-side (user's web browser).
Visitors to a fusker website frequently see copyrighted pornographic images that have been separated from their intended context, known as hot-linking.
[4] Companies that provide free hosted galleries strongly dislike fuskers because they have the potential to cost them a lot of money in bandwidth bills, and because the only reason the free galleries are provided is to entice the user into clicking on a more profitable link, and those links are no longer displayed when a fusker is used.
[citation needed] Some client-side fusker implementations blindly search domains for images based on common file names and directory structures.
referrer and user agent headers are rewritten to an acceptable value, and more complex implementations can also emulate a web browser to the point of being able to click links and log into accounts.
However, unlike a bookmark, these implementations may access thousands of images at the same time and may also overload servers not capable of servicing this amount of content.
"Fusker" is a Danish term which originally meant a person covertly doing work outside the official guilds.
[7] The original fusker technology was created by Carthag Tuek,[8][9] who made the Perl CGI script as a work-alike of the UNIX/Linux cURL tool, specifically its URL-globbing functionality.