Odtnhj

I want to implement file download using this Angular 6 code:

Rest API:

private static final Logger LOG = LoggerFactory.getLogger(DownloadsController.class);

private static final String EXTERNAL_FILE_PATH = "/Users/test/Documents/blacklist_api.pdf";

@GetMapping("export")
public ResponseEntity<FileInputStream> export() throws IOException 
 File pdfFile = Paths.get(EXTERNAL_FILE_PATH).toFile();

 HttpHeaders headers = new HttpHeaders();
 headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
 headers.add("Pragma", "no-cache");
 headers.add("Expires", "0");

 return ResponseEntity.ok().headers(headers).contentLength(pdfFile.length())
 .contentType(MediaType.parseMediaType("application/pdf"))
 .body(new FileInputStream(pdfFile));

Service:

import Injectable from '@angular/core';
import HttpClient, HttpParams from "@angular/common/http";
import Observable from "rxjs/index";
import environment from "../../../environments/environment";
import HttpUtils from "../common/http-utils";
import map from 'rxjs/operators';
import Http, ResponseContentType from '@angular/http';


@Injectable(
 providedIn: 'root'
)
export class DownloadService 

 constructor(private http: HttpClient) 
 

 downloadPDF(): any 
 return this.http.get(environment.api.urls.downloads.getPdf, 
 responseType: 'blob'
 )
 .pipe(
 map((res: any) => 
 return new Blob([res.blob()], 
 type: 'application/pdf'
 )
 )
 );
 

Component:

import Component, OnInit from '@angular/core';
import DownloadService from "../service/download.service";
import ActivatedRoute, Router from "@angular/router";
import flatMap from "rxjs/internal/operators";
import of from "rxjs/index";
import map from 'rxjs/operators';

@Component(
 selector: 'app-download',
 templateUrl: './download.component.html',
 styleUrls: ['./download.component.scss']
)
export class DownloadComponent implements OnInit 

 constructor(private downloadService: DownloadService,
 private router: Router,
 private route: ActivatedRoute) 
 

 ngOnInit() 
 

 export() 
 this.downloadService.downloadPDF().subscribe(res => 
 const fileURL = URL.createObjectURL(res);
 window.open(fileURL, '_blank');
 ); 
 

The file is present in the directory but when I try to download it I get error:

18:35:25,032 WARN [org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver] (default task-2) Resolved [org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation]

Do you know how I can fix this issue?
Do I need to add additional configuration in order to download the file via Angular web UI?

I use spring-boot-starter-parent version 2.1.0.RELEASE