Monday, May 14th 2012:
These commits solve the problem of retrieving thumbnails and fanart provided by JSON-RPC after introducing the new texture caching functionality in the video library. With the new cache XBMC uses image://<path-to-real-file> URLs to relate to images. Currently this only is implemented for video artwork, music artwork still uses the old special://<some-path> URLs but they should both work. We used this opportunity to introduce a new image handler
in the webserver which is meant to replace the existing VFS handler someday in the near future. This means that images can and should from now on be retrieved using the following HTTP URL: http://<ip>:<port>/image/<url-encoded-image-path>
where <url-encoded-image-path> can either be a image://- or a special://-based URL. It is very important that the whole image-URL provided by JSON-RPC is URL-encoded because otherwise it will result in an invalid URL and will not work. If you're not sure what the resulting URL should look like, take a image-URL returned by JSON-RPC and use Files.PrepareDownload to retrieve the actual URL you should call. For the time being you can still use the "old" VFS handler but we plan to remove it because it is a huge security risk/hole.
As always feel free to ask if you have any questions/problems.