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

Question

I am creating one angular2 app in which I am using http in my service to make POST call to mongoDB.
When I am making a POST call for the first time it is working fine i.e. entry is inserted into database correctly but when I am sending the data for second time it is not getting inserted.
If I am reloading the page after first insertion then its working fine.
I did some debugging and found that during second request my req.body is blank.
Here is my 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 is printing both times correctly
//on second request data is blank where as it works correctly for first time
return this.http.post(url, JSON.stringify(data),{headers: this.headers})
.map((res: Response) => res.json()).catch(this.handleError);
}
Here is my 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?

Answer 1

It looks more like a backend thing. You should however include the code that subscribes on this http call.
By the way, why are you using RC1? Angular 2 is now on RC5.

Answer 2

I finally realised that my method used to set content-type each time it was getting called.
Thus changing code from :
savePage(page: Object) {
this.headers.append('Content-Type', 'application/json');
let url = this.baseUrl+'/pm/pages/';
let data={};
data["data"]=page;
return this.http.post(url, JSON.stringify(data),{headers: this.headers})
.map((res: Response) => res.json()).catch(this.handleError);
}
to:
savePage(page: Object) {
this.headers=new Headers();
this.headers.append('Content-Type', 'application/json');
let url = this.baseUrl+'/pm/pages/';
let data={};
data["data"]=page;
return this.http.post(url, JSON.stringify(data),{headers: this.headers})
.map((res: Response) => res.json()).catch(this.handleError);
}
did the trick for me.
Actually we need to set headers only once while making a rest call,but in my code it was already set thus creating new Headers Object helped me clearing any previously set configurations.
Thanks for the help guys.