node.js - angular2-rc1 http.post not working correctly -

i creating 1 angular2 app in using http in service make post call mongodb.

when making post call first time working fine i.e. entry inserted database correctly when sending data second time not getting inserted.

if reloading page after first insertion working fine.

i did debugging , found during second request req.body blank.

here code:

page.service.ts

savepage(page: object) {     this.headers.append('content-type', 'application/json');     let url = this.baseurl+'/pm/pages/';           let data={};     data["data"]=page;     console.log(data); //this printing both times correctly     //on second request data blank works correctly first time            return this.http.post(url, json.stringify(data),{headers: this.headers})         .map((res: response) => res.json()).catch(this.handleerror); } 

here data in req.body shown in node services.

first request:

body:{      data:{          name: 'wtwetwet',         desc: 'wetwetwetetwte',         ispublic: true,         createdby: 'bhushan'     } } 

second request

body: {} 

any inputs?

it looks more backend thing. should include code subscribes on http call.

by way, why using rc1? angular 2 on rc5.