> With XSJS I can create file (pdf,csv,etc) on server?
On the file system of the OS of the HANA Server? No there is no API which allows this.
> On SPS09 there is a rest API to work with files of hana repositorie. Anyone know with I can do this with this API?
No the REST API only reads/writes content to/from the HANA Repository. The Repository is contained with the HANA Database. Not stored at the file system level.