Cloud Storage for Firebase：下载所有文件的元数据

Question

问：有没有办法下载云存储中所有个文件的元数据？

参考：我查看了 AngularFire2 的文档，虽然我可以下载一个文件的元数据，但我不知道如何提取存储中所有文件的元数据。 AngularFire2 FireStorage documentation

代码：我正在成功提取一个文件的元数据。

Component.TS

 fileUrl: Observable<string>;
 fileCollection: Observable<any>;

 constructor(firestorage: AngularFireStorage) { 
 const ref = firestorage.ref('nforms/').child('file.pdf');
 this.fileUrl = ref.getDownloadURL();
 this.fileCollection = ref.getMetadata();
}

Component.HTML

<tr *ngIf="fileCollection | async; let f">
<td><pre><code>{{f | json}}</code></pre> . 
</td>
<td>f</td>
<div *ngIf="fileUrl | async; let url">
<td><a target="_self" [href]="url">download</a></td>
</div>
</tr>

当前结果

{
  "type": "file",
  "bucket": "this-is-a-secret",
  "generation": "this-is-a-secret",
  "metageneration": "1",
  "fullPath": "nforms/file.pdf",
  "name": "file.pdf",
  "size": 318522,
  "timeCreated": "2019-08-09T21:52:53.692Z",
  "updated": "2019-08-09T21:52:53.692Z",
  "md5Hash": "this-is-a-secret",
  "contentDisposition": "inline; filename*=utf-8''file.pdf",
  "contentEncoding": "identity",
  "contentType": "application/pdf"
}

Answer 1

您必须列出所有文件，然后单独访问它们的元数据。没有对对象元数据进行任何批量操作。

Cloud Storage for Firebase：下载所有文件的元数据

Cloud Storage for Firebase: download metadata of all files

firebase-storage

angularfire2