cmail\src\app\services\login.service.ts

login.service.ts

import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { tap } from 'rxjs/operators';

@Injectable({
  providedIn: 'root'
})
export class LoginService {

  api = 'http://localhost:3200/login'

  constructor(private http: HttpClient) { }

  logar(dadosLogin) {
    return this.http.post(this.api, dadosLogin)
      .pipe(
        tap((response: any) => localStorage.setItem('cmail-token', response.token))
      );
  }

  // Novo código aqui
  validaToken() {
    const headers = new HttpHeaders({
      'Content-Type': 'application/json',
      'Authorization': localStorage.getItem('cmail-token')
    });

    return this.http
      .head(
        'http://localhost:3200/validate'
        , {
          headers
          , observe: 'response'
        }
      )
  }
}