Question

我有一个AWS S3存储桶，我有多个文件夹。

s3 = AWS::S3.new
bucket =  s3.buckets['test']
bucket.exists? => true

假设我有一个名为demo/index.html的资源，我将如何检查this bucket中是否存在此资源？

可能我的问题太简单了，但我无法为此找到合适的答案。任何帮助表示赞赏。

Answer 1

<强> #exists？ ⇒布尔

如果对象存在于S3中，则返回true。

# new object, does not exist yet
obj = bucket.objects["my-text-object"]
# no instruction file present
begin
  bucket.objects['my-text-object.instruction'].exists? #=> false
rescue
  # exists? can raise an error `Aws::S3::Errors::Forbidden`
end


# store the encryption materials in the instruction file
# instead of obj#metadata
obj.write("MY TEXT",
  :encryption_key => MY_KEY,
  :encryption_materials_location => :instruction_file)

begin
  bucket.objects['my-text-object.instruction'].exists? #=> true
rescue
  # exists? can raise an error `Aws::S3::Errors::Forbidden`
end

http://docs.aws.amazon.com/AWSRubySDK/latest/AWS/S3/S3Object.html#exists%3F-instance_method

如何检查AWS S3bucket中是否存在资源

1 个答案: