9.3 Upload File - quan1997ap/angular-app-note GitHub Wiki

import { Component, VERSION } from '@angular/core';
import {HttpClientModule, HttpClient, HttpRequest, HttpResponse, HttpEventType} from '@angular/common/http';

@Component({
  selector: 'my-app',
  template: `
    Version = {{version.full}} <br/>
    <input type="file" (change)="upload($event.target.files)" />
    Upload Percent: {{percentDone}}% <br />
    
    <ng-container *ngIf="uploadSuccess">
      Upload Successful
    </ng-container> 
  `,
})
export class AppComponent {
  percentDone: number;
  uploadSuccess: boolean;

  constructor(
    private http: HttpClient,
    ) { }
    
  version = VERSION
  
  upload(files: File[]){
    //pick from one of the 4 styles of file uploads below
    this.uploadAndProgress(files);
  }

  basicUpload(files: File[]){
    var formData = new FormData();
    Array.from(files).forEach(f => formData.append('file', f))
    this.http.post('https://file.io', formData)
      .subscribe(event => {  
        console.log('done')
      })
  }
  
  //this will fail since file.io dosen't accept this type of upload
  //but it is still possible to upload a file with this style
  basicUploadSingle(file: File){    
    this.http.post('https://file.io', file)
      .subscribe(event => {  
        console.log('done')
      })
  }
  
  uploadAndProgress(files: File[]){
    console.log(files)
    var formData = new FormData();
    Array.from(files).forEach(f => formData.append('file',f))
    
    this.http.post('https://file.io', formData, {reportProgress: true, observe: 'events'})
      .subscribe(event => {
        if (event.type === HttpEventType.UploadProgress) {
          this.percentDone = Math.round(100 * event.loaded / event.total);
        } else if (event instanceof HttpResponse) {
          this.uploadSuccess = true;
        }
    });
  }
  
  //this will fail since file.io dosen't accept this type of upload
  //but it is still possible to upload a file with this style
  uploadAndProgressSingle(file: File){    
    this.http.post('https://file.io', file, {reportProgress: true, observe: 'events'})
      .subscribe(event => {
        if (event.type === HttpEventType.UploadProgress) {
          this.percentDone = Math.round(100 * event.loaded / event.total);
        } else if (event instanceof HttpResponse) {
          this.uploadSuccess = true;
        }
    });
  }
}