Setting up headers for HTTP requests in Angular2

I'm in need of customizing the authentication header for all API requests. I plan to include this header in the constructor and simply use this.http in my class methods.

import { Injectable } from '@angular/core';

import { Config, Events } from 'ionic-angular';

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


@Injectable()

export class APIRequest {

    constructor (
        private http: Http,
        private config: Config,
    ) { 
        this.http.headers.append('My-Custom-Header','MyCustomHeaderValue');
    }
}

Answer №1

When it comes to setting up headers, I utilize a common function in the following manner:

let method = 'POST';

let requestOptions: RequestOptions = new RequestOptions({
headers: this.jsonHeaders(),
method: method
});

The function jsonHeaders() handles the creation of the headers.

public jsonHeaders(): Headers {
let headers: Headers = new Headers();
headers.append('Content-Type', 'application/json; charset=utf-8');
headers.append("Cache-Control", "no-cache");
headers.append("Cache-Control", "no-store");
headers.append("If-Modified-Since", "Mon, 26 Jul 1997 05:00:00 GMT");

if(this.token) {
headers.append('Authorization', 'Bearer ' + this.token);
}

return headers;
}

Next step involves making an HTTP request:

let url = '/login'
this.http.request(url, requestOptions)

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