Firebase存储随机返回存储/取消

Question

我收到一条错误消息，指出用户取消了上传，并且从控制台中的一次上传中收到了三个错误（上传文件时，来自Firebase存储的所有错误都相同。我看不到代码中的方式表示正在进行取消（假设由于声明了被用户取消，则它位于代码内。

  startUpload(event: FileList, item:string) {
    // The File object
    const file = event.item(0);
    console.log(item);

    // Client-side validation example
    if (file.type.split('/')[0] !== 'image') { 
      console.error('unsupported file type')
      return;
    }

    // The storage path
    const path = `test/${new Date().getTime()}_${file.name}`;

    // Totally optional metadata
    const customMetadata = { user: item };

    // The main task
    this.uploadStatus = 'inprogress';
    this.task = this.storage.upload(path, file, { customMetadata })
    const fileRef = this.storage.ref(path);

    // Progress monitoring
    this.percentage = this.task.percentageChanges();
    this.snapshot = this.task.snapshotChanges().pipe(
      tap(snap => {
        if (snap.bytesTransferred === snap.totalBytes) {
          // Update firestore on completion
          this.db.collection('photos').add( { path, size: snap.totalBytes }); 
          this.uploadStatus = "finished";
        }
      }),
      finalize(()=>{
        this.downloadURL = fileRef.getDownloadURL();
        console.log("Final");
      })
    );

}

chrome控制台的完整错误：“存储/取消”代码_：“存储/取消”消息：“ Firebase存储：用户取消了上载/下载”。message _：“ Firebase存储：用户取消了上载/下载。” name：（...）name_：“ FirebaseError” serverResponse：null serverResponse_：null

Firebase存储：显示某些上载有效（即使出现错误）：

Answer 1

我自己刚刚遇到了这个错误：

FirebaseStorageError {code_: "storage/canceled", message_: "Firebase Storage: User canceled the upload/download.", serverResponse_: null, name_: "FirebaseError"}

我原来的看法

 <mat-progress-bar mode="determinate" *ngIf="(uploadPercent | async) == 0" [value]="uploadPercent | async"></mat-progress-bar>

| async

是取消 observable 的罪魁祸首。

解决方案：

        <ng-container *ngIf="(uploadPercent$ | async); let uploadPercent">
            <mat-progress-bar mode="determinate" *ngIf="uploadPercent !== 100" [value]="uploadPercent"></mat-progress-bar>
        </ng-container>