Problem in getting the Odata from the server

Hi all,

          I am a beginner in sapui 5 . When I am trying to call the data from the url I am getting this . Its been 3 days n still the issue is not resolving.

please help me out .

1. OPTIONS http://deneb.prospecta.in:8000/sap/opu/odata/sap/ZEST_FLIGHT_SRV/$metadata 401 (Unauthorized) datajs.js:17
   1. o.defaultHttpClient.requestdatajs.js:17
   2. E2datajs.js:17
   3. o.requestdatajs.js:17
   4. O._loadMetadataODataMetadata.js:6
   5. sap.ui.base.EventProvider.extend.constructorODataMetadata.js:6
   6. M.extend.constructorODataModel.js:6
   7. osap-ui-core.js:116
   8. sap.ui.controller.onInitNew.controller.js:10
   9. a.fireEventsap-ui-core.js:122
   10. a.fireEventsap-ui-core.js:134
   11. (anonymous function)sap-ui-core.js:134
   12. sap.ui.core.mvc.View._initCompositeSupportView.js:6
   13. E.extend.constructorsap-ui-core.js:134
   14. M.extend.constructorsap-ui-core.js:134
   15. E.extend.constructorsap-ui-core.js:134
   16. fsap-ui-core.js:122
   17. fsap-ui-core.js:122
   18. sap.ui.jsviewJSView.js:6
   19. o.(anonymous function)sap-ui-core.js:116
   20. (anonymous function)index.html:58

1. XMLHttpRequest cannot load http://deneb.prospecta.in:8000/sap/opu/odata/sap/ZEST_FLIGHT_SRV/$metadata. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:57107' is therefore not allowed access.