Using MiniProfiler with Angular & HttpClient for SPAs http://www.arturdr.ru/net/using-mini-profiler-with-angular-and-httpclient/ (ported from https://gist.github.com/GeorgDangl/2807d11b367540e1de5629502289f5a8)

app.module.ts

import { NgModule } from '@angular/core';
import { HttpClientModule, HTTP_INTERCEPTORS, } from '@angular/common/http';
import { MiniProfilerInterceptor } from './mini-profiler-http';

@NgModule({
    providers: [
        { provide: HTTP_INTERCEPTORS, useClass: MiniProfilerInterceptor, multi: true },
    ]
})
export class AppModule { }

MiniProfilerInterceptor.ts

import { Injectable } from '@angular/core';
import { HttpInterceptor, HttpHandler, HttpRequest, HttpEvent, HttpResponse, HttpHeaders }
  from '@angular/common/http';

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/do';
declare var MiniProfiler: any;

@Injectable()
export class MiniProfilerInterceptor implements HttpInterceptor {
  intercept(
    req: HttpRequest<any>,
    next: HttpHandler
  ): Observable<HttpEvent<any>> {

    return next.handle(req).do(evt => {
      if (evt instanceof HttpResponse) {
        if (typeof MiniProfiler !== 'undefined' && evt && evt.headers) {
          this.makeMiniProfilerRequests(evt.headers);
        }
      }
    });
  }

  private makeMiniProfilerRequests(headers: HttpHeaders) {
    const miniProfilerHeaders = headers.getAll('x-miniprofiler-ids');

    if (!miniProfilerHeaders) {
      return;
    }

    miniProfilerHeaders.forEach(miniProfilerIdHeaderValue => {
      const ids = JSON.parse(miniProfilerIdHeaderValue) as string[];
      MiniProfiler.fetchResults(ids);
    });
  }
}

What is declare var MiniProfiler: any; ?

I am trying to use your code

with DotNetCore 2.2 and Angular 8

I enable CORS like below in my startup class

services.AddCors(options => options.AddPolicy("Cors", builder =>
            {
                builder.AllowAnyOrigin()
                       .AllowAnyMethod()
                       .AllowAnyHeader();
            }));

there is some thing strange in the response

when I console.log(r.headers) at line 22

unfortunately there is no x-miniprofiler-ids in the header object

but in fiddler and chrome network tab the x-miniprofiler-ids do exists in the response object

so UI does not show the miniprofiler detail notifier

is there any thing extra which i have to do ???

is there any specila config for dot net core or angular or httpclient ???

is your code compelete and well tested ????

Hi, thanks for this gist, I am implementing the same thing but I was wondering do I need to install mini profiler npm package?