使用Google云端存储从Firebase存储中删除文件夹 [英] Delete Folder from Firebase Storage using Google Cloud Storage

问题描述

我已经可以删除文件夹以及FirebaseStorage中的所有内容/子文件夹终端使用这个代码：

$ pre $ g $ g $ g $ g $ r $ r $ g $：//bucketname.appspot.com/test/**

然而，当我试图在java中这样做，它不起作用。

$ p $ 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：

<$ p $线程FirebaseDatabaseEventTarget中的异常com.google.cloud.storage.StorageException：无效的存储桶名称：'bucketname.appspot.com/test'
，位于com.google.cloud.storage。 spi.DefaultStorageRpc.translate（DefaultStorageRpc.java:202）
，com.google.cloud.storage.spi.DefaultStorageRpc.get（DefaultStorageRpc.java:322）
，com.google.cloud.storage。 StorageImpl $ 4.call（StorageImpl.java:164）
在com.google.cloud.storage.StorageImpl $ 4.call（StorageImpl.java:161）
在com.google.cloud.RetryHelper.doRetry RetryHelper.java:179）
，位于com.google.cloud.RetryHelper.runWithRetries（RetryHelper.java:244）
，位于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（GroupRequestManage r.java:26）
at xxx.backend.server_request.ServerRequestListener.onChildAdded（ServerRequestListener.java:27）
at com.google.firebase.database.core.ChildEventRegistration.fireEvent（ChildEventRegistration.java： 65）
，位于com.google.firebase.database.core.view.DataEvent.fire（DataEvent.java:49）
位于com.google.firebase.database.core.view.EventRaiser $ 1.run （EventRaiser.java:41）
在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142）$ b $在java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:617 ）
在java.lang.Thread.run（Thread.java:745）
引起：com.google.api.client.googleapis.json.GoogleJsonResponseException：400错误请求
{
code：400，
errors：[{
domain：global，
message：无效的存储桶名称：'bucketname.appspot.com / test'，
reason：invalid
}]，
message：无效的桶名称：'bucketname.appspot.c om / test'
}

那么它不存在吗？因为当我运行这个代码没有/测试：

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

然后存在返回true，没有例外，我可以列出所有的斑点..但我想删除/ test中的所有内容。

编辑：好的，我确实得到了它的工作，但我需要使用一个迭代器。有更好的解决方案吗？通配符还是什么？

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

解决方案

存储桶是容纳数据的基本容器。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，所以它不是您的存储桶的有效名称。通过调用 bucket.delete（...），您只能删除整个存储桶，但无法删除存储桶中的文件夹。使用 GcsService 删除文件或文件夹。

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

I want to delete the folder "test" and everything that is in it.

I am sucessfuly able to delete the folder and all it's contents/subfolders in FirebaseStorage with the terminal using this code:

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

However when I tried to do it in java, it does not work.

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

It throws this exception:

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$4.call(StorageImpl.java:164)
    at com.google.cloud.storage.StorageImpl$4.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$1.run(EventRaiser.java:41)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$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'"
}

So then it does not exist? because when I run this code without /test:

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

then exists returns true, no exception and I am able to list all the blobs.. But I want to delete all that is inside "/test".

Edit: Okay, I did get it to work like this, but I need to use a iterator. Is there a better solution? A wildcard or something?

    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);

解决方案

Buckets are the basic containers that hold your data. You have a bucket with name "bucketname.appspot.com". "bucketname.appspot.com/test" is your bucket name plus a folder, so its not a valid name of your bucket. By calling bucket.delete(...) you can delete only the whole bucket, but you cannot delete a folder in a bucket. Use GcsService to delete files or folders.

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

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