How to get HTTP headers from Data Provider Class?

Hi,

I'm the beginner in SAP NetWeaver Gateway. Using Service Builder I created CRUD OData web service and implemented CRUD operations in Data Provider Class. Data Provider Class has methods like MYENTITY_GET_ENTITYSET, MYENTITY_GET_ENTITY, MYENTITY_CREATE_ENTITY, MYENTITY_UPDATE_ENTITY. How can I get HTTP headers from the methods of this Data Provider Class?