javascript – Firebase存储随机返回存储/取消

我收到一条错误,指出用户取消了上传,我从控制台中的单个上传中收到了三个错误(上传文件时来自firebase存储的错误相同.我无法在代码中看到如何正在取消(假设由于它声明其被用户取消,因此它在代码内).

  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”
码_
：
“存储/取消”
信息
：
“Firebase存储：用户取消了上传/下载.”
信息_
：
“Firebase存储：用户取消了上传/下载.”
名称
：
(……)
名称_
：
“FirebaseError”
serverResponse
：
空值
serverResponse_
：
空值

Firebase存储：显示一些上传工作(即使我收到错误)：

解决方法:

我自己也遇到了这个错误：

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

是取消可观察性的罪魁祸首.

解：

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

标签：javascript,firebase,firebase-storage
来源： https://codeday.me/bug/20190710/1424864.html