How I add Headers to http.get or http.post in Typescript and angular 2?

Question

getHeroes (): Observable {
    return this.http.get(this.heroesUrl)
      .map(this.extractData)
      .catch(this.handleError);
  }

Answer 1

if someone facing issue of CORS not working in mobile browser or mobile applications, you can set ALLOWED_HOSTS = ["your host ip"] in backend servers where your rest api exists, here your host ip is external ip to access ionic , like External: http://192.168.1.120:8100

After that in ionic type script make post or get using IP of backened server

in my case i used django rest framwork and i started server as:- python manage.py runserver 192.168.1.120:8000

and used this ip in ionic get and post calls of rest api