Intercept export from web client to apply DRM

*Requested Result*
> Customer using DRM, want to intercept exported files from Webplayer, because they have to lock exported file (.ppt, .csv, .pdf).
> They want to intercept files that exported from Webplayer and apply DRM to exported files using DRM solution. But there are no Webplayer Api to intercept file.
> Using 'Custom Export Tool' sample in SDK sample source, it could be can export file with DRM. But users need to use origin function of Spotfire. Because quality of exported results is more better and Spotfire has many useful feature like 'Export as editable image' and detail setting of PDF. It is not easy to develop same as Spotfire.
> Please consider to apply DRM to exported files.