使用 Google 云存储从 Firebase 存储中删除文件夹

Delete Folder from Firebase Storage using Google Cloud Storage

我想删除文件夹 "test" 以及其中的所有内容。

我使用以下代码成功删除了文件夹及其在 FirebaseStorage 中的所有内容 contents/subfolders:

gsutil rm -r gs://bucketname.appspot.com/test/**

然而,当我在 java 中尝试这样做时,它不起作用。

    Storage storage = StorageOptions.getDefaultInstance().getService();
    String bucketName = "bucketname.appspot.com/test";
    Bucket bucket = storage.get(bucketName);
    bucket.delete(Bucket.BucketSourceOption.metagenerationMatch());

它抛出这个异常:

Exception in thread "FirebaseDatabaseEventTarget" com.google.cloud.storage.StorageException: Invalid bucket name: 'bucketname.appspot.com/test'
    at com.google.cloud.storage.spi.DefaultStorageRpc.translate(DefaultStorageRpc.java:202)
    at com.google.cloud.storage.spi.DefaultStorageRpc.get(DefaultStorageRpc.java:322)
    at com.google.cloud.storage.StorageImpl.call(StorageImpl.java:164)
    at com.google.cloud.storage.StorageImpl.call(StorageImpl.java:161)
    at com.google.cloud.RetryHelper.doRetry(RetryHelper.java:179)
    at com.google.cloud.RetryHelper.runWithRetries(RetryHelper.java:244)
    at com.google.cloud.storage.StorageImpl.get(StorageImpl.java:160)
    at xxx.backend.server_request.GroupRequestManager.deleteGroupStorage(GroupRequestManager.java:119)
    at xxx.backend.server_request.GroupRequestManager.deleteGroup(GroupRequestManager.java:26)
    at xxx.backend.server_request.ServerRequestListener.onChildAdded(ServerRequestListener.java:27)
    at com.google.firebase.database.core.ChildEventRegistration.fireEvent(ChildEventRegistration.java:65)
    at com.google.firebase.database.core.view.DataEvent.fire(DataEvent.java:49)
    at com.google.firebase.database.core.view.EventRaiser.run(EventRaiser.java:41)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: com.google.api.client.googleapis.json.GoogleJsonResponseException: 400 Bad Request
{
  "code" : 400,
  "errors" : [ {
    "domain" : "global",
    "message" : "Invalid bucket name: 'bucketname.appspot.com/test'",
    "reason" : "invalid"
  } ],
  "message" : "Invalid bucket name: 'bucketname.appspot.com/test'"
}

那么它不存在?因为当我 运行 这个代码没有 /test:

    Storage storage = StorageOptions.getDefaultInstance().getService();
    String bucketName = "bucketname.appspot.com";
    Bucket bucket = storage.get(bucketName);
    bucket.exists(Bucket.BucketSourceOption.metagenerationMatch());

然后存在 returns 是的,没有例外,我能够列出所有的 blob。但是我想删除“/test”中的所有内容。

编辑:好的,我确实让它像这样工作,但我需要使用迭代器。有更好的解决方案吗?通配符之类的?

    Storage storage = StorageOptions.getDefaultInstance().getService();
    String bucketName = "bucketname.appspot.com";
    Page<Blob> blobPage = storage.list(bucketName, Storage.BlobListOption.prefix("test/"));
    List<BlobId> blobIdList = new LinkedList<>();
    for (Blob blob : blobPage.iterateAll()) {
        blobIdList.add(blob.getBlobId());
    }
    storage.delete(blobIdList);

存储桶是保存数据的基本容器。您有一个名为 "bucketname.appspot.com" 的存储桶。 "bucketname.appspot.com/test" 是您的存储桶名称加上一个文件夹,因此它不是您的存储桶的有效名称。调用bucket.delete(...)只能删除整个bucket,不能删除bucket中的文件夹。使用 GcsService 删除文件或文件夹。

String bucketName = "bucketname.appspot.com";
GcsService gcsService = GcsServiceFactory.createGcsService(RetryParams.getDefaultInstance());
gcsService.delete(new GcsFilename(bucketName, "test"));

我在 上 post 提出了一个可能的解决方案,并且 post 也会在这里提出。

这是使用 Firebase 函数删除 Firebase 存储文件夹中文件的一种解决方案。

假设您的模型存储在 Firebase 数据库的 /MyStorageFilesInDatabaseTrackedHere/path1/path2 下。

这些模型将有一个名为 "filename" 的字段,该字段将具有 Firebase 存储中文件的名称。

工作流程是:

  1. 删除 Firebase 数据库中包含模型列表的文件夹
  2. 通过 Firebase 函数侦听该文件夹的删除
  3. 此函数将遍历文件夹的子文件夹,获取文件名并将其删除到存储中。

(免责声明:存储中的文件夹在此函数结束时仍然存在,因此需要再次调用以将其删除。)

// 1. Define your Firebase Function to listen for deletions on your path
exports.myFilesDeleted = functions.database
    .ref('/MyStorageFilesInDatabaseTrackedHere/{dbpath1}/{dbpath2}')
    .onDelete((change, context) => {

// 2. Create an empty array that you will populate with promises later
var allPromises = [];

// 3. Define the root path to the folder containing files
// You will append the file name later
var photoPathInStorageRoot = '/MyStorageTopLevelFolder/' + context.params.dbpath1 + "/" + context.params.dbpath2;

// 4. Get a reference to your Firebase Storage bucket
var fbBucket = admin.storage().bucket();

// 5. "change" is the snapshot containing all the changed data from your
// Firebase Database folder containing your models. Each child has a model
// containing your file filename
if (change.hasChildren()) {
    change.forEach(snapshot => {

        // 6. Get the filename from the model and
        // form the fully qualified path to your file in Storage
        var filenameInStorage = photoPathInStorageRoot + "/" + snapshot.val().filename;

        // 7. Create reference to that file in the bucket
        var fbBucketPath = fbBucket.file(filenameInStorage);

        // 8. Create a promise to delete the file and add it to the array
        allPromises.push(fbBucketPath.delete());
    });
}

// 9. Resolve all the promises (i.e. delete all the files in Storage)
return Promise.all(allPromises);
});