ODATA error in SAPUI5

hi Experts,

I am new to SAPUI5 and trying to build a simple application that can consume a OData WS.

In the JS view, i am creating a ODataModel as

var oModel = new sap.ui.model.odata.ODataModel(

"proxy/http://services.odata.org/Northwind/Northwind.svc");

This opens a Table in with No Data..

the logs shows below error

1. GET http://localhost:8080/SITMIL/proxy/http://services.odata.org/Northwind/Northwind.svc/$metadata 500 (Internal Server Error) datajs.js:17
   1. o.defaultHttpClient.requestdatajs.js:17
   2. D2datajs.js:17
   3. o.requestdatajs.js:17
   4. o.readdatajs.js:17
   5. sap.ui.model.odata.ODataMetadata._loadMetadataODataMetadata.js:7
   6. sap.ui.base.Object.extend.constructorODataMetadata.js:6
   7. sap.ui.model.Model.extend.constructorODataModel.js:6
   8. osap-ui-core.js:117
   9. sap.ui.jsview.createContentretrieveFlight.view.js:88
   10. (anonymous function)JSView.js:6
   11. sap.ui.base.ManagedObject.runWithPreprocessorssap-ui-core.js:117
   12. sap.ui.core.mvc.JSView.onControllerConnectedJSView.js:6
   13. sap.ui.core.mvc.View._initCompositeSupportView.js:6
   14. sap.ui.base.EventProvider.extend.constructorsap-ui-core.js:117
   15. sap.ui.base.ManagedObject.extend.constructorsap-ui-core.js:117
   16. sap.ui.core.Element.extend.constructorsap-ui-core.js:117
   17. fsap-ui-core.js:117
   18. fsap-ui-core.js:117
   19. osap-ui-core.js:117
   20. sap.ui.viewView.js:6
   21. o.(anonymous function)sap-ui-core.js:117
   22. (anonymous function)(index):18
   23. 
       

I have seen many posts here which talks about "proxy/" prefix change. But removing the proxy prefix throws 501 error.

I have also tried to use the other SAP GW WS - https://sapes1.sapdevcenter.com/sap/opu/odata/IWFND/RMTSAMPLEFLIGHT; which also gave same error.

Please help to fix this error.

thanks,

Sujay