Erwin Erwin - 1 month ago 12
JSON Question

Can I return raw json response in angular2

Is it possible for angular2 to return raw json response? Ex.

Component

getrawJson(){
this.someservice.searchJson()
.subscribe( somelist => this.somelist = somelist,
error => this.errorMsg = <any>error);
}


For service

searchJson(num: number, somestring: string, somestring2: string): Observable<stringDataObj> {

let body = JSON.stringify({"someJsonData"[{num, somestring, somestring2}]});
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });


return this.http.post(URL, body, options)
.map(this.jsonObj)
.catch(this.handleError);

}


private jsonObj(res: Response) {
let body;
return body{ };
}


The above implementation returns Array . Will there be a way for me to get the raw json data returned by the service? I'm expecting to have json response like below

{
"dataParam": [ {
"num": "08",
"somestring": "2016-10-03",
"somestring2": "2016-10-03"
}],
"someDatalist": [ {
"one": "08",
"two": 1,
"three": "2016-10-03"
}]
}

Thanks!

Answer

Yes off course you can !!

Actually angualar2 returns Response in the form of Observable instead of promise Like in angular1.x , so in order to convert that observable into raw Json format we have to use the default method of angular2 i.e

res.json()

There are no of method apart from .json() provided by angular which can be described here for more info.

methods include

  • res.text()
  • res.status
  • res.statusText etc

https://angular.io/docs/ts/latest/api/http/index/Response-class.html

update

use your code like this

return this.http.post(URL, body, options)
                        .map(res => {return res.json()})
                        .catch(this.handleError);

      }