45 lines
1.7 KiB
TypeScript
45 lines
1.7 KiB
TypeScript
// https://github.com/52North/helgoland-toolbox/blob/495f75cadcc3e7232206db1cd5dd8bbf3a172c4b/libs/core/src/lib/dataset-api/http.service.ts#L37
|
|
import { Injectable } from '@angular/core';
|
|
import { HttpClient, HttpEvent, HttpHandler, HttpRequest } from '@angular/common/http';
|
|
import { Inject, InjectionToken, Optional } from '@angular/core';
|
|
import { Observable } from 'rxjs';
|
|
|
|
import { HttpRequestOptions } from '../../shared/models/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)
|
|
});
|
|
}
|
|
}
|