I currently have an issue with tslint and was hoping someone could point me in the right direction.
I'm trying to send an HTTP GET request using HTTP provided by the Angular2 framework. With this request, I must specify the content-type and the bearer authentication token.
Example of my code:
let headers = new Headers();
let authToken = this._user.getUser().JWT;
headers.append('Content-Type', 'application/json');
headers.append('Authorization', `Bearer ${authToken}`);
let options = new RequestOptions({ headers: headers });
this._http.get('http://' + url '/', options)
.timeout(3000)
.subscribe(
(res) => {
This works, however, tslint is complaining that
"TS2345: Argument of type '{ headers: Headers; }' is not assignable to parameter of type 'RequestOptionsArgs'. Types of property 'headers' are incompatible. Type 'Headers' is not assignable to type 'Headers'. Two different types with this name exist, but they are unrelated. Property 'keys' is missing in type 'Headers'."
I appreciate the support.
There are two ways by which we can add the headers. One, we add the HTTP Headers while making a request. The second way is to use the HTTP interceptor to intercept all the Requests and add the Headers. In both cases, we use the httpHeaders configuration option provided by angular HttpClient to add the headers.
Creates a request options object to be optionally provided when instantiating a Request . This class is based on the RequestInit description in the Fetch Spec. All values are null by default. Typical defaults can be found in the BaseRequestOptions class, which sub-classes RequestOptions .
Update
As of today, @angular/http
has been deprecated, and @angular/common/http
should be used instead. So the best way to work with http headers is to import import { HttpHeaders } from '@angular/common/http';
(documentation).
Old answer
The Headers
type you are supposed to import is import { Headers } from '@angular/http';
.
Check your imports
You have to update headers by:
let headers = {headers: new HttpHeaders({ 'Content-Type': 'application/x-www-form-urlencoded'})};
Update for Angular 5
import { RequestOptions } from '@angular/http';
I found this in the comments from the correct answer, so If this helps somebody, good luck.
Documentation: https://angular.io/api/http/RequestOptions
// example of headers of content type Json
import { Http, Headers, RequestOptions } from '@angular/http';
const Url = 'http://localhost:3000/';
const headers = new Headers;
const body = JSON.stringify({
title: "data"
});
headers.append('Content-Type', 'application/json');
this.http.post(Url, body, { headers: headers })
.pipe(map((res => res)));
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