Uploads a zip archive containing HTML5 assets.
Replaces all existing files of the current banner.
Only applicable to HTML5 banners.
The following changes are automatically applied to the zip archive:
- Empty directories are removed.
- Special files/directories commonly archived by accident are removed (for example: __MACOSX, Thumbs.db).
- Top level directory is removed and subdirectories are moved up one level (covers the common case
of archives containing a directory named after the archive itself).
See Banner::getValidHtml5FileExtensions() for a list of valid file extensions.
The base64 encoded zip file.
The total file size after zip extraction in bytes or 0 in case of errors.