Store Documents on LAN using ABAP Webdynpro Application

I am working on a requirement to store documents in LAN directory from a webdynpro application. SAP delivered FM's are available for SAPGUI but i can't find for webdynpro. Goal is to read a docuemnt from user desktop using File Upload function and then store on a LAN directory. Also retrieve document from LAN and then display. Also delete document from LAN.

Any help is appreciated.