Firebase E/StorageException：发生了 StorageException。对象在该位置不存在

Question

我正在尝试将 4 个不同的图像上传到 firebase 存储，我的代码适用于单个图像，但每当我尝试上传多个图像时，我都会得到

 E/StorageException: StorageException has occurred.
    Object does not exist at location.
     Code: -13010 HttpResult: 404
2021-11-18 22:45:16.584 com.example.test E/StorageException: {  "error": {    "code": 404,    "message": "Not Found."  }}
    java.io.IOException: {  "error": {    "code": 404,    "message": "Not Found."  }}
        at com.google.firebase.storage.network.NetworkRequest.parseResponse(NetworkRequest.java:445)
        at com.google.firebase.storage.network.NetworkRequest.parseErrorResponse(NetworkRequest.java:462)
        at com.google.firebase.storage.network.NetworkRequest.processResponseStream(NetworkRequest.java:453)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:272)
        at com.google.firebase.storage.network.NetworkRequest.performRequest(NetworkRequest.java:289)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:76)
        at com.google.firebase.storage.internal.ExponentialBackoffSender.sendWithExponentialBackoff(ExponentialBackoffSender.java:68)
        at com.google.firebase.storage.GetDownloadUrlTask.run(GetDownloadUrlTask.java:77)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.lang.Thread.run(Thread.java:923)

这是我将图像上传到 Firebase 存储的代码，即使出现错误，我也可以在 firebase 存储上看到图像，但我在应用程序上遇到错误。

private synchronized void UploadToFireBaseStorage(ArrayList<String> filePath,int type) {
        
        final ArrayList<String> multipleImages = new ArrayList<>();
        Log.d(TAG,"Size of File at Upload Method "+filePath.size());

        if (filePath.size()==0){
            return;
        }

        
        Uri fileUri = null;

        for (String s : filePath) {
            if (s.contains(".jpg")) {
                    fileUri = Uri.fromFile(new File(s));
                } else {
                    fileUri = Uri.parse(s);
                }

            
            StorageReference mStorageReference = FirebaseStorage.getInstance().getReference();
            Log.d(TAG, "UploadToFireBaseStorage: StorageRef "+mStorageReference);

           
            storageReference = mStorageReference.child("Photos").child(fileUri.getLastPathSegment());
           
            Log.d(TAG, "UploadToFireBaseStorage: Storage Reference "+storageReference);
            Log.d(TAG, "UploadToFireBaseStorage: File URI = "+fileUri);
            String finalAttachmentType = attachmentType;
            String finalUploadFolder = uploadFolder;
            storageReference.putFile(fileUri).addOnSuccessListener(this, new OnSuccessListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

                    storageReference.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
                        @Override
                        public void onSuccess(@NonNull Uri uri) {
                            Log.d(TAG, "Image Uploaded ");
                            Log.d(TAG, "onSuccess: URI Uploaded == "+uri);
                            
                        }
                    });
                }
            }).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
                @Override
                public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                    double progress = 100.0 * taskSnapshot.getBytesTransferred() / (double) taskSnapshot.getTotalByteCount();
                    Log.d(TAG, "Upload is " + progress + "% done");
                    

                }
            }).addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Log.d(TAG, "onFailure: "+s);
                    
                }
            });
        }
        Log.d(TAG,"Image List "+multipleImages.toString());
    }

这些是我为 4 个不同图像获得的存储参考

Storage Reference gs://example-89902.appspot.com/Photos/Image%20IMG_1637256617899.jpg

Storage Reference gs://example-89902.appspot.com/Photos/Image%20IMG_1637256617949.jpg

Storage Reference gs://example-89902.appspot.com/Photos/Image%20IMG_1637256618132.jpg

Storage Reference gs://example-89902.appspot.com/Photos/Image%20IMG_1637256618070.jpg

Firebase 存储规则：

Firebase Storage Rules
service firebase.storage {
  match /b/bucket/o {
    match /{allPaths=**} {
      allow read, write;
    }
  }
}

Answer 1

根据堆栈跟踪，问题似乎与获取下载网址有关：

at com.google.firebase.storage.GetDownloadUrlTask.run(GetDownloadUrlTask.java:77)

可能是这段代码造成的：

@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {

  storageReference.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
      @Override
      public void onSuccess(@NonNull Uri uri) {
          Log.d(TAG, "Image Uploaded ");
          Log.d(TAG, "onSuccess: URI Uploaded == "+uri);
          
      }
  });
  
}

我的猜测是上传成功回调与存储引用和相应下载 url 可用的时刻之间存在某种竞争条件。

请按照Firebase documentation中的建议，尝试修改您的代码以获得下载地址：

private synchronized void UploadToFireBaseStorage(ArrayList<String> filePath,int type) {
        
    final ArrayList<String> multipleImages = new ArrayList<>();
    Log.d(TAG,"Size of File at Upload Method "+filePath.size());

    if (filePath.size()==0){
        return;
    }

    
    Uri fileUri = null;

    for (String s : filePath) {
        if (s.contains(".jpg")) {
                fileUri = Uri.fromFile(new File(s));
            } else {
                fileUri = Uri.parse(s);
            }

        
        StorageReference mStorageReference = FirebaseStorage.getInstance().getReference();
        Log.d(TAG, "UploadToFireBaseStorage: StorageRef "+mStorageReference);

        
        storageReference = mStorageReference.child("Photos").child(fileUri.getLastPathSegment());
        
        Log.d(TAG, "UploadToFireBaseStorage: Storage Reference "+storageReference);
        Log.d(TAG, "UploadToFireBaseStorage: File URI = "+fileUri);
        String finalAttachmentType = attachmentType;
        String finalUploadFolder = uploadFolder;
        UploadTask uploadTask = storageReference.putFile(fileUri).addOnSuccessListener(this, new OnSuccessListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                // The stuff you considerd appropriate
                Log.d(TAG, "Image Uploaded ");
            }
        }).addOnProgressListener(new OnProgressListener<UploadTask.TaskSnapshot>() {
            @Override
            public void onProgress(UploadTask.TaskSnapshot taskSnapshot) {
                double progress = 100.0 * taskSnapshot.getBytesTransferred() / (double) taskSnapshot.getTotalByteCount();
                Log.d(TAG, "Upload is " + progress + "% done");
                

            }
        }).addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.d(TAG, "onFailure: "+s);
                
            }
        });

        uploadTask.continueWithTask(new Continuation<UploadTask.TaskSnapshot, Task<Uri>>() {
            @Override
            public Task<Uri> then(@NonNull Task<UploadTask.TaskSnapshot> task) throws Exception {
                if (!task.isSuccessful()) {
                    throw task.getException();
                }

                // Continue with the task to get the download URL
                return ref.getDownloadUrl();
            }
        }).addOnCompleteListener(new OnCompleteListener<Uri>() {
            @Override
            public void onComplete(@NonNull Task<Uri> task) {
                if (task.isSuccessful()) {
                    Uri downloadUri = task.getResult();
                    Log.d(TAG, "onSuccess: URI Uploaded == "+downloadUri);
                } else {
                    // Handle failures
                    // ...
                }
            }
        });
    }
    Log.d(TAG,"Image List "+multipleImages.toString());
}

以前UploadTask.TaskSnapshot 有一个getDownloadUrl() 方法，但它不再可用。例如，this one 等不同的问题已经讨论了这个主题，它也提供了更多的替代方案。

---

作为旁注，您在 cmets 中指出其中两个图像已成功上传，而另外两个未成功上传，并且可能不相关，但肯定很好奇。正如您在source code of Uploadtask 中看到的那样，此类任务是使用以下代码安排的：

@Override
protected void schedule() {
  StorageTaskScheduler.getInstance().scheduleUpload(getRunnable());
}

StorageTaskScheduler 在最多两个线程的线程池执行器中调度上传：

private static final ThreadPoolExecutor UPLOAD_QUEUE_EXECUTOR =
    new ThreadPoolExecutor(
        2, 2, 5, TimeUnit.SECONDS, mUploadQueue, new StorageThreadFactory("Upload-"));

当您尝试上传比可用线程数更多的图像时，此线程池可能会阻止某些上传。

相比之下，获取下载url的操作是在不同的thread pool中进行的：

private static final ThreadPoolExecutor COMMAND_POOL_EXECUTOR =
    new ThreadPoolExecutor(
        5, 5, 5, TimeUnit.SECONDS, mCommandQueue, new StorageThreadFactory("Command-"));

如您所见，在这个池中线程数为 5，这意味着有足够的空间来提交 get 下载任务操作。

我查看了代码，没有发现任何泄漏，但可以肯定的是，这种差异可能与您的问题有任何关系。