Estoy tratando de hacer una llamada ajax con el servicio Http, que funciona bien.

Ahora me gustaría manejar casos de falla. Ejemplo si obtenemos 404 o cualquier otro error.

Estoy usando el siguiente código.

import {Component,Inject} from '@angular/core';
import {Http, Response,HTTP_PROVIDERS} from '@angular/http';
import {DoService} from './service';
import 'rxjs/Rx';
import 'rxjs/add/operator/catch';

@Component({
    selector: 'comp-one',
    template: `<h2>My First Angular 2 App</h2>{{data}}
        <input type="button" (click)="doSomething()" value="Do Http"/>`
})

export class ComponentOne { 
    constructor(public _http:Http){
    console.log("It is from ComponentOne constructor..");
        this._http = _http;
    }
    data:Object;
    doSomething(){
        console.log("It is from doSomething ComponentOne");
        let temp:any = this._http.get('people.json')//people.json is not exist, intendedly maing any error
     .map(res => res.json())
        .catch((err:any)=>{ console.log("Something is wrong..")});// If i keep this line i am getting errors like "Argument of type '(err:any) => void' is not assignable to parameter of type '(err: any, caught: Observable<any>) => Observable<{}>"
        temp.subscribe(
        (res:any)=> {this.data = res._body; console.log(res)},
        (error:any)=>{ console.log("It isf from error..")},//It is not even getting called this block
        () => console.log('thire,,,ddjfladjfljasdlfj'));//In one of the forum they suggested to use this 3rd perameter, this is also not working for me.

  } 

}