libs/core/src/lib/dataset-api/http.service.ts
Methods |
intercept | ||||||||||||
intercept(req: HttpRequest
|
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Parameters :
Returns :
Observable<HttpEvent<any>>
|
import { HttpClient, HttpEvent, HttpHandler, HttpRequest } from '@angular/common/http';
import { Inject, Injectable, InjectionToken, Optional } from '@angular/core';
import { Observable } from 'rxjs';
import { HttpRequestOptions } from '../model/internal/http-requests';
export const HTTP_SERVICE_INTERCEPTORS = new InjectionToken<HttpServiceInterceptor>('HTTP_SERVICE_INTERCEPTORS');
export interface HttpServiceHandler {
handle(req: HttpRequest<any>, options: Partial<HttpRequestOptions>): Observable<HttpEvent<any>>;
}
export interface HttpServiceInterceptor {
intercept(req: HttpRequest<any>, options: Partial<HttpRequestOptions>, next: HttpServiceHandler): Observable<HttpEvent<any>>;
}
@Injectable()
export class HttpService {
private handler: HttpServiceHandler;
constructor(
protected httpHandler: HttpHandler,
@Optional() @Inject(HTTP_SERVICE_INTERCEPTORS) interceptors: HttpServiceInterceptor[] | null
) {
let handler: HttpServiceHandler = {
handle: (req, options) => httpHandler.handle(req)
};
if (interceptors) {
handler = interceptors.reduceRight((next, interceptor) => ({
handle: (req, options) => interceptor.intercept(req, options, next)
}), handler);
}
this.handler = handler;
}
public client(options: HttpRequestOptions = {}): HttpClient {
return new HttpClient({
handle: (req) => this.handler.handle(req, options)
});
}
}