Angular 4 Get Data from server via webserivce

consultant.component.ts

getConsultantDataFromServer(){
    this.DataWebService.getConsultantsFromServer().subscribe(data => {
      this.data = data;
      console.log(data);
      this.dataSource = new MyDataSource(this.data, this.paginator, this.sort, this.firstname, this.lastname);
      this.data_length = data.length;`
    })
  }

webservice-getdata.service.ts

  getConsultantsFromServer() {
    let data = {"business_shortname": "Marico"};
    // let data = {"business_shortname": "VUFPO"};
    return this.http.put("http://localhost:8000/instance/webservice/serve/consultants/for/business/", data, {headers: this.headers})
      .map(res => res.json());
  }