（Java Springboot-UI组件）当尝试从已部署的URL（Mulesoft URL）获取数据时，Angular 8材料出现Bad Request错误。该网址在POSTMAN中正常工作。

//Here is my Proxy.config.json file
"/mule1/*": {
  "target":  {
    "host": "apdev-ordertracking-msws.us-e2.cloudhub.io","protocol": "http:"
  },"secure": false,"changeOrigin": true,"logLevel": "info","pathRewrite": {"^/mule1" : ""}
}

//Service.ts
export class OrderService {
orderTrackingUrl: string = '/mule1/ordertracking'

public getTrackingOrder(): Observable<tracklist[]>{
    let url = `${this.orderTrackingUrl}`;
    return this.http.get<tracklist[]>(url);
  }
}

//Component.ts
export class ProductTrackingPageComponent implements OnInit {
orderTracklist: tracklist[];
  ngOnInit() {
this.display=true;
    this.getOrderTrack();
}
getOrderTrack(): void {
    this.orderService.getTrackingOrder().subscribe(data => {
      this.orderTracklist=data;
    })
}