Angular2 cross domain http get

I am trying to fetch a JSON file from a remote server. I wrote the following module :

import { Component } from '@angular/core';
import { Injectable } from '@angular/core';
import { Http, Response, Headers } from '@angular/http';
import { Observable } from 'rxjs/Observable';

import './rxjs-operators';


@Component({
selector: 'map',
templateUrl: 'map/map.component.html'
})

@Injectable()
export class MapComponent{

private properties;

constructor(private http: Http){

this.properties = null;
}

ngOnInit(){

this.getPropertiesInTheArea();
}

getPropertiesInTheArea(){

let url = "https://raw.githubusercontent.com/sdeering/50-jquery-function-demos/cd89f8592b96d0a79c10aa64fa43c1bf01312643/data/data.json";

this.http.get(url)
.map(response => response.json())
.subscribe(
data => this.properties = data,
err => console.error(err),
() => console.log("Properties fetched\n\n" + JSON.stringify(this.properties))
);
}

}


This module can perfectly fetch a local JSON file :

let url = "http://localhost:3000/map/data.json";


But for a remote resource (on raw.githubusercontent.com for example) I get in the console :

"EXCEPTION: [Exception... "" nsresult: "0x805e0006 ()" location: "JS frame :: http://localhost:3000/node_modules/zone.js/dist/zone.js :: scheduleTask :: line 1241" data: no]"


Unhandled Promise rejection: Exception { message: "", result: 2153644038, name: "", filename: "http://localhost:3000/node_modules/…", lineNumber: 1241, columnNumber: 0, data: null, stack: "scheduleTask@http://localhost:3000/…" } ; Zone: ; Task: Promise.then ; Value: Exception { message: "", result: 2153644038, name: "", filename: "http://localhost:3000/node_modules/…", lineNumber: 1241, columnNumber: 0, data: null, stack: "scheduleTask@http://localhost:3000/…" } undefined
​

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