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import { Injectable } from '@angular/core'
import {
ConnectionBackend,
Headers,
Http,
Request,
RequestMethod,
RequestOptions,
RequestOptionsArgs,
Response,
XHRBackend
} from '@angular/http'
import { Observable } from 'rxjs/Observable'
import { AuthService } from '../../core'
@Injectable()
export class AuthHttp extends Http {
constructor (backend: ConnectionBackend, defaultOptions: RequestOptions, private authService: AuthService) {
super(backend, defaultOptions)
}
request (url: string | Request, options?: RequestOptionsArgs): Observable<Response> {
if (!options) options = {}
options.headers = new Headers()
this.setAuthorizationHeader(options.headers)
return super.request(url, options)
.catch((err) => {
if (err.status === 401) {
return this.handleTokenExpired(url, options)
}
return Observable.throw(err)
})
}
delete (url: string, options?: RequestOptionsArgs): Observable<Response> {
if (!options) options = {}
options.method = RequestMethod.Delete
return this.request(url, options)
}
get (url: string, options?: RequestOptionsArgs): Observable<Response> {
if (!options) options = {}
options.method = RequestMethod.Get
return this.request(url, options)
}
post (url: string, body: any, options?: RequestOptionsArgs): Observable<Response> {
if (!options) options = {}
options.method = RequestMethod.Post
options.body = body
return this.request(url, options)
}
put (url: string, body: any, options?: RequestOptionsArgs): Observable<Response> {
if (!options) options = {}
options.method = RequestMethod.Put
options.body = body
return this.request(url, options)
}
private handleTokenExpired (url: string | Request, options: RequestOptionsArgs) {
return this.authService.refreshAccessToken()
.flatMap(() => {
this.setAuthorizationHeader(options.headers)
return super.request(url, options)
})
}
private setAuthorizationHeader (headers: Headers) {
headers.set('Authorization', this.authService.getRequestHeaderValue())
}
}
export function useFactory (backend: XHRBackend, defaultOptions: RequestOptions, authService: AuthService) {
return new AuthHttp(backend, defaultOptions, authService)
}
export const AUTH_HTTP_PROVIDERS = [
{
provide: AuthHttp,
useFactory,
deps: [ XHRBackend, RequestOptions, AuthService ]
}
]
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