适用于S3文件副本的AWS SDK v2 AllAccessDisabled错误

Question

我正在切换到我编写的rails应用程序中的新aws-sdk,并且在我的生活中找不到在v2 sdk中使用相应的方法.我也遇到访问被拒绝的问题,我无法解决.

我使用v1 sdk的方式是用户使用"uploads"命名空间密钥直接上传到s3,在他们创建了他们正在处理的对象之后,回调将文件移动到longterm密钥并删除旧密钥.这是一个例子:

  def move_file
    old_key = s3_key
    new_key = "#{self.class.table_name}/#{id}/#{Digest::SHA1.hexdigest([Time.now, rand].join)}/#{filename}"
    AWS.config(access_key_id: ENV['AWS_ACCESS_KEY_ID'], secret_access_key: ENV['AWS_SECRET_ACCESS_KEY'], region: 'us-east-1')
    s3 = AWS::S3.new
    bucket_name = ENV['AWS_S3_BUCKET']
    bucket = s3.buckets[bucket_name]
    object = bucket.objects[old_key]

    begin
      object.move_to new_key, :acl => :public_read
      rescue AWS::S3::Errors::NoSuchKey
          errors.add(:base, "Oops! Something went wrong uploading your file. Please try again, and if the problem persists, open a trouble ticket.")
    end

    if !bucket.objects[old_key].exists? && bucket.objects[new_key].exists?
      update_column(:s3_key, new_key)
    end
  end

效果很好,但现在我正在尝试更新到新的sdk.我一直在努力的是:

  def move_file
    old_key = file
    new_key = "#{self.class.table_name}/#{id}/#{Digest::SHA1.hexdigest([Time.now, rand].join)}/#{filename}"
    s3 = Aws::S3::Client.new

    begin
      s3.copy_object({copy_source:old_key, key:new_key, bucket: ENV['AWS_S3_BUCKET'], acl:'public-read'})
      s3.delete_object({bucket: ENV['AWS_S3_BUCKET'], key:old_key})
      update_column(:file, new_key)
      rescue Aws::S3::Errors::ServiceError
          errors.add(:base, "Oops! Something went wrong uploading your file. Please try again, and if the problem persists, open a trouble ticket.")
    end
  end

每当我尝试移动上传的文件时它会抛出并发生错误 - Aws :: S3 :: Errors :: AllAccessDisabled:对此对象的所有访问都被禁用

我试过改变处理安全凭证的方式.我没有使用裸访问密钥/密钥对,而是在IAM中创建了一个用户,附加了一个策略,授予他们对S3的完全访问权限并尝试使用这些凭据,但无济于事.

我究竟做错了什么？但是,如果有人熟悉新的sdk,我的copy_object方法是否正确？

Answer 1

该错误是由:copy_source您传递给的值引起的#copy_object.该值必须是源桶和源密钥,用斜杠(/)分隔:

"#{sourcebucket}/#{sourcekey}"

您的old_key值包含正斜杠.Amazon S3将获取该密钥的第一个路径段,并将其视为存储桶名称.因为您没有该存储桶的权限,所以您收到了身份验证错误.您的凭证配置可能很好.

要更正此错误:

def move_file
  bucket = ENV["AWS_S3_BUCKET"]
  old_key = file
  new_key = "#{self.class.table_name}/#{id}/#{Digest::SHA1.hexdigest([Time.now, rand].join)}/#{filename}"
  s3 = Aws::S3::Client.new

  begin
    s3.copy_object(bucket:bucket, key:new_key, copy_source:"#{bucket}/#{old_key}", acl:'public-read')
    s3.delete_object(bucket:bucket, key:old_key)
    update_column(:file, new_key)
  rescue Aws::S3::Errors::ServiceError
    errors.add(:base, "Oops! Something went wrong uploading your file. Please try again, and if the problem persists, open a trouble ticket.")
  end
end