How to inject HttpClient in static method or custom class?

Question

I\'d like to use angular HttpClient in static method or class (in class it can\'t be defined as constructor parameter).

I tried something like:

Answer 1

base on Andrew answer. If you want to use interceptors in this this httpClient pipeline, add two redefined classes from angular repo http/src/interceptor.ts and http/src/module.ts:

class HttpInterceptorHandler implements HttpHandler {
  constructor(private next: HttpHandler, private interceptor: HttpInterceptor) {}

  handle(req: HttpRequest): Observable> {
      return this.interceptor.intercept(req, this.next);
  }
}
class HttpInterceptingHandler implements HttpHandler {
  private chain: HttpHandler|null = null;
  private httpBackend:HttpHandler;
  constructor(private injector: Injector) {
      this.httpBackend = new HttpXhrBackend({ build: () => new XMLHttpRequest });
  }

  handle(req: HttpRequest): Observable> {
      if (this.chain === null) {
          const interceptors = this.injector.get(HTTP_INTERCEPTORS, []);
          this.chain = interceptors.reduceRight((next, interceptor) => new HttpInterceptorHandler(next,interceptor),this.httpBackend);
      }
      return this.chain.handle(req);
    }
}

Interceptors need without @Injectable decorator:

class HttpIntersept implements HttpInterceptor{
  intercept(req: HttpRequest, next: HttpHandler): Observable> {
      console.log(req.urlWithParams);
      return next.handle(req)
  }
}

And like Andrew was say

const injector = Injector.create({
providers: [
    { provide: HTTP_INTERCEPTORS, useClass: HttpIntersept, multi: true, deps: []},
    { provide: HTTP_INTERCEPTORS, useClass: HttpIntersept2, multi: true, deps: []},
    { provide: HttpHandler, useClass:HttpInterceptingHandler,deps [Injector,HTTP_INTERCEPTORS]},
    { provide: HttpClient, deps: [HttpHandler] }
 ],
});