云存储拒绝权限 Android Studio

Posted 2023-04-19

【中文标题】云存储拒绝权限 Android Studio

【英文标题】：Cloud storage Denied Permission Android Studio

【发布时间】：2021-07-05 06:42:57

【问题描述】：

所以我在使用模拟时向我的 firebase 存储添加了一些安全规则，它按预期工作，但是当我从我的应用程序实际执行时，它显示了这个错误

2021-04-09 16:43:00.322 17375-17375/com.margsapp.messenger E/StorageException: StorageException has occurred.
User does not have permission to access this object.
Code: -13021 HttpResult: 403

2021-04-09 16:43:00.323 17375-17375/com.margsapp.messenger E/StorageException: The server has terminated the upload session
java.io.IOException: The server has terminated the upload session

Caused by: java.io.IOException:   "error":     "code": 403,    "message": "Permission denied. Could not perform this operation"  

所以我简化了日志猫

这是我的安全规则

rules_version = '2';
service firebase.storage 
match /b/bucket/o 

match /allPaths=** 
  allow read: if request.auth != null;


match/ProfileImages/userId      //Am trying to upload an image to this directory.
allow read: if request.auth != null;
allow write: if request.auth != null && request.auth.uid == userId;

match/GroupImages
allow read,write: if request.auth != null;

如果需要上传图片的代码我会上传 如果我在规则上犯了任何错误，请告诉我正确的做法。

编辑：这是上传图片的代码

storageReference = FirebaseStorage.getInstance().getReference("/ProfileImages/"+firebaseUser.getUid());

@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) 
    super.onActivityResult(requestCode, resultCode, data);


    if (requestCode == GALLERY_PICK && resultCode == RESULT_OK && data != null) 
        imageUri = data.getData();
        CropImage.activity(imageUri)
                .setGuidelines(CropImageView.Guidelines.ON)
                .setAspectRatio(1, 1)
                .start(this);

    

    if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) 

        CropImage.ActivityResult result = CropImage.getActivityResult(data);

        if (resultCode == RESULT_OK) 
            loadingBar.setTitle("Profile Image");
            loadingBar.setMessage("Please wait, while we update your profile picture...");
            loadingBar.show();
            loadingBar.setCanceledOnTouchOutside(false);
            assert result != null;
            Uri resultUri = result.getUri();

            StorageReference filepath = storageReference.child(System.currentTimeMillis()
                    + "." + getFileExtension(resultUri));


            uploadTask = filepath.putFile(resultUri);
            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();
                    
                    return filepath.getDownloadUrl();
                
            ).addOnCompleteListener(new OnCompleteListener<Uri>() 
                @Override
                public void onComplete(@NonNull Task<Uri> task) 
                    if (task.isSuccessful()) 
                        Toast.makeText(edit_profile.this, "Image has been stored in our servers", Toast.LENGTH_SHORT).show();

                        Uri downloadUri = task.getResult();
                        assert downloadUri != null;
                        String mUri = downloadUri.toString();


                        reference = FirebaseDatabase.getInstance().getReference("Users").child(firebaseUser.getUid());
                        HashMap<String, Object> map = new HashMap<>();
                        map.put("imageURL", mUri);
                        reference.updateChildren(map);

                        loadingBar.dismiss();

                    
                
            );
         else 
            Toast.makeText(this, "Profile Picture updation is cancelled", Toast.LENGTH_SHORT).show();
            loadingBar.dismiss();
        
    


private String getFileExtension(Uri uri)
    ContentResolver contentResolver = edit_profile.this.getContentResolver();
    MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
    return mimeTypeMap.getExtensionFromMimeType(contentResolver.getType(uri));

【问题讨论】：

请向我们展示产生该错误的代码。

我已经添加了上传到图像的代码，我也已经添加了 LogCat

【参考方案1】：

要解决您的问题，您需要匹配以下所有路径：

ProfileImages -> userId

在您的存储分区中。所以你的规则应该是这样的：

rules_version = '2';
service firebase.storage 
    match /b/bucket/o 
        match /allPaths=** 
            allow read: if request.auth != null;
        
        match /ProfileImages/userId 
            match /allPaths=** 
                allow read: if request.auth != null;
                allow write: if request.auth != null && request.auth.uid == userId;
             
        
    

【讨论】：

我已经应用了规则，但是当我运行模拟时它拒绝访问，甚至使用用户 ID 进行身份验证

这只是ProfileImages -> userId 的一个例子。请再检查一次。我刚刚更新了我的答案。

好的，非常感谢它的工作，但我不得不对你的代码做一个小的改动，你实际上错过了提到规则版本，所以当我添加它时，它再次按预期工作非常感谢你帮助

很高兴听到它有效。刚刚用“rules_version = '2';”更新了我的答案。