ControllerLinkBuilder does not handle special query parameter characters correctly

[SingleShot]

We are experiencing issues using ControllerLinkBuilder with certain characters in query params, and must do some nasty hacks to get around it.

Consider this use of ControllerLinkBuilder:

linkTo(methodOn(BookController.class).findBooksByTitle("Spring#\n").withRel("book"));

Note the odd goofy search string with the # sign and Java newline. This results in an exception rather a proper link.

The link that one might expect to be generated is:

http://localhost/books?title=Spring#\n

Which when properly encoded would be:

http://localhost/books?title=Spring%23%0A

While those example characters may seem strange, a valid URL is possible when encoded properly, but the link builder is instead throwing.