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Angular 2, Http service wrapper to pass authorization token with each request.
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import {Injectable, EventEmitter} from 'angular2/core'; | |
import {Http, Headers, RequestOptions, RequestOptionsArgs, Response, RequestMethod, Request, Connection, ConnectionBackend} from 'angular2/http'; | |
import * as Rx from 'rxjs'; | |
export enum Action { QueryStart, QueryStop }; | |
@Injectable() | |
export class AuthHttp { | |
process: EventEmitter<any> = new EventEmitter<any>(); | |
authFailed: EventEmitter<any> = new EventEmitter<any>(); | |
constructor(private _http: Http) { } | |
private _buildAuthHeader(): string { | |
return localStorage.getItem("authToken"); | |
} | |
public get(url: string, options?: RequestOptionsArgs): Rx.Observable<Response> { | |
return this._request(RequestMethod.Get, url, null, options); | |
} | |
public post(url: string, body: string, options?: RequestOptionsArgs): Rx.Observable<Response> { | |
return this._request(RequestMethod.Post, url, body, options); | |
} | |
public put(url: string, body: string, options?: RequestOptionsArgs): Rx.Observable<Response> { | |
return this._request(RequestMethod.Put, url, body, options); | |
} | |
public delete(url: string, options?: RequestOptionsArgs): Rx.Observable<Response> { | |
return this._request(RequestMethod.Delete, url, null, options); | |
} | |
public patch(url: string, body: string, options?: RequestOptionsArgs): Rx.Observable<Response> { | |
return this._request(RequestMethod.Patch, url, body, options); | |
} | |
public head(url: string, options?: RequestOptionsArgs): Rx.Observable<Response> { | |
return this._request(RequestMethod.Head, url, null, options); | |
} | |
private _request(method: RequestMethod, url: string, body?: string, options?: RequestOptionsArgs): Rx.Observable<Response> { | |
let requestOptions = new RequestOptions(Object.assign({ | |
method: method, | |
url: url, | |
body: body | |
}, options)); | |
if (!requestOptions.headers) { | |
requestOptions.headers = new Headers(); | |
} | |
requestOptions.headers.set("Authorization", this._buildAuthHeader()) | |
return Rx.Observable.create((observer) => { | |
this.process.next(Action.QueryStart); | |
this._http.request(new Request(requestOptions)) | |
.map(res=> res.json()) | |
.finally(() => { | |
this.process.next(Action.QueryStop); | |
}) | |
.subscribe( | |
(res) => { | |
observer.next(res); | |
observer.complete(); | |
}, | |
(err) => { | |
switch (err.status) { | |
case 401: | |
//intercept 401 | |
this.authFailed.next(err); | |
observer.error(err); | |
break; | |
default: | |
observer.error(err); | |
break; | |
} | |
}) | |
}) | |
} | |
} |
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