Angular2 Response for preflight is invalid (redirect) from some GET requests

问题

I am using Angular2, Communicating with a rest API, settings the header like so:

import { Headers } from '@angular/http';

export const contentHeaders = new Headers();
contentHeaders.append('Accept', 'application/json');
contentHeaders.append('Content-Type', 'application/json');
contentHeaders.append('Authorization', localStorage.getItem('id_token'));

Get request like items/ and POST request works, but when making GET requests for one item, like: items/579212a6541d5626732619c3 the server respond with a server error Response for preflight is invalid (redirect)

I thought those get requests are the same, but maybe they are not ? Any solutions ?

回答1:

Redirect + says that you are probably being redirected from that particular request. Are you sure that the ID of item is handled correctly on a backend?

来源：https://stackoverflow.com/questions/38716357/angular2-response-for-preflight-is-invalid-redirect-from-some-get-requests