Angular 2：EXCEPTION：狀態響應：0表示URL：null

我正嘗試使用http.get從我的Angular2/ionic2應用發送HTTP GET請求。 HTTP GET請求包含有效的Linkedin訪問令牌，應該返回一些profiledata。然而，當getProfileData()被稱爲出現以下錯誤：Angular 2：EXCEPTION：狀態響應：0表示URL：null

3  229881 group EXCEPTION: Response with status: 0 for URL: null 
4  229895 error EXCEPTION: Response with status: 0 for URL: null 
5  229909 groupEnd 
6  229950 error Uncaught Response with status: 0 for URL: null, http://192.168.178.49:8100/build/js/app.bundle.js, Line: 95774

還有：

用相同的URL的GET請求時，在www.hurl.it
GET請求從被稱爲測試工程該應用使用不同的網址，例如let URL = "https://httpbin.org/get?name=hannes"

職-load.ts：

import { Component } from '@angular/core'; 
import { NavController, Platform, Alert } from 'ionic-angular'; 
import { OnboardingHelloPage } from '../onboarding-hello/onboarding-hello'; 
import { CordovaOauth, LinkedIn } from 'ng2-cordova-oauth/core';  
import { Http, Headers, RequestOptions } from '@angular/http'; 
import 'rxjs/add/operator/map' 


@Component({ 
    templateUrl: 'build/pages/onboarding-load/onboarding-load.html', 
}) 
export class OnboardingLoadPage { 
    private data; 
    private code; 

constructor(private navCtrl: NavController, private platform: Platform, private http: Http) { 
    this.http = http; 
    this.navCtrl = navCtrl; 
    } 

public getProfileData() { 
    let URL = "https://api.linkedin.com/v1/people/~?oauth2_access_token=SOMEVALIDTOKEN&format=json"; 
    //let URL = "https://httpbin.org/get?name=hannes" 

    this.http.get(URL) 
    .map(res => res.json()) 
    .subscribe(data => { 
     this.data = data; 
     console.log(JSON.stringify(data)); 
    }); 
    // go to next page 
    this.viewOnboardingHello(); 
} 
... 
}

來源

2016-09-15 Hannes Kannes

有同樣的問題。這非常煩人。所以基本功能不起作用，涵蓋微不足道的情況 – Roman

需要修復此 – user2320607

當發生此問題時，它通常是一個CORS問題， – LeRoy