Angular 5 - HTTP post - http

Question

I have a backend interface which I invoke with my Angular 1.3 application without problems. With my Angular 5 application I get an HTTP 403 (Forbidden)
I faced the request parameters in an picture (Angular 1.3 at the left side, Angular 5 at the right side):
My Angular 5 code looks like this:
createDate(calendarEvent: CalendarEvent) {
let serialDates = false;
let calendarEventSerialDateType = 'NO_SERIAL_DATE';
let serialEndDate = this.utilService.convertDateToDateString(new Date());
let url: string = environment.apiEndpoint + 'calendarevents/calendarevent/' + serialDates + '/' + calendarEventSerialDateType + '/' + serialEndDate + '/';
let headers = new Headers({ 'Content-Type': 'application/json', 'X-AUTH-TOKEN': this.authService.getToken()});
let options = new RequestOptions({ headers: headers });
return this.http.post(url, calendarEvent, options).map(res => res.json()).subscribe(res => console.log(res));
}
I have e.g. no idea why X-AUTH-TOKEN is not set with Angular 5 because I set it in the headers object with
let headers = new Headers({ 'Content-Type': 'application/json', 'X-AUTH-TOKEN': this.authService.getToken()});
and why OPTIONS is mentioned at Request Method with Angular 5 instead of POST like with angular 1.3.
Does anyone have any idea what I am doing wrong?

Answer 1

let Options = {
headers: new HttpHeaders({
'Content-Type': 'application/json'
})
};
return this.http.post(url, calendarEvent, Options).map(res => res.json()).subscribe(res => console.log(res));

Answer 2

OPTIONS request is considered as a pre-flight request, which is sent before the actual request to check the existence of method.
If the request sent is a valid one, it will call the valid method.
And regarding the request header, you can use the one in the above answer.
let Options = {
headers: new HttpHeaders({
'Content-Type': 'application/json'
})
};

Answer 3

For Angular5,
import { HttpClient, HttpHeaders } from '#angular/common/http';
const headers = new HttpHeaders().set('X-AUTH-TOKEN', this.authService.getToken());
By default, 'Content-Type': 'application/json'
Stop using map.
Subscribe the response and store it to Observable for further access.
Example:
createDate(calendarEvent: CalendarEvent) {
let serialDates = false;
let calendarEventSerialDateType = 'NO_SERIAL_DATE';
let serialEndDate = this.utilService.convertDateToDateString(new Date());
let url: string = environment.apiEndpoint + 'calendarevents/calendarevent/' + serialDates + '/' + calendarEventSerialDateType + '/' + serialEndDate + '/';
let headers = new HttpHeaders().set('X-AUTH-TOKEN', this.authService.getToken());
return this.http.post(url, calendarEvent, {headers: headers}).subscribe(res => console.log(res));
}