vData.service.ts

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { AngularFireDatabase, AngularFireList } from 'angularfire2/database';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/catch';
import { catchError } from 'rxjs/operators';

@Injectable()

export class VDataService {
    constructor(private db: AngularFireDatabase,
        private http: HttpClient) { }
    vList: AngularFireList<any>;
    //url: string;
    request_options: string;
    getVideoData(): any {
        this.vList = this.db.list('/newCour');
        return this.vList;
    }
    UpdateVideoList($key: string, flag: boolean) {
        this.vList.update($key, { Completed: flag });
    }
    uploadFile(file) {
        let formData: FormData = new FormData();
        formData.append('file', file, file.name);
      
        this.http.post("http://localhost:/4200/", formData)
      }

      

      postFile(fileToUpload: File): Observable<boolean> {
        const endpoint = 'your-destination-url';
        const formData: FormData = new FormData();
        formData.append('fileKey', fileToUpload, fileToUpload.name);
        return this.http
          .post(endpoint, formData, { headers: this.yourHeadersConfig })
          .map(() => { return true; })
          .catchError((e) => this.handleError(e));
          }
    
}