检查文件夹是否存在于 s3 存储桶中 [英] Check if folder exist in s3 bucket

问题描述

如何使用 Ruby on Rails 检查我的 s3 存储桶中是否存在某个文件夹?

我正在使用 AWS:S3 官方 gem初始化全局连接后

AWS::S3::Base.establish_connection!(:access_key_id => 'my_key_id', :secret_access_key => 'my_secret')

我的存储桶名为:myfirstbucket

文件夹内命名为:my_folder

my_folder 中的文件名为:my_pic.jpg

当我尝试检查 my_pic.jpg 是否存在时，它工作得很好

s3object.exists?/my_folder/my_pic.jpg"，myfirstbucket"=>真的

如何只检查文件夹是否存在?

s3object = AWS::S3::S3Objects3object.exists?/my_folder/"、myfirstbucket"=>错误的

解决方案

Use Bucket#objects:

bucket.objects({prefix: 'my/folder/'}).limit(1).any?

<块引用>

返回 ObjectSummary 资源的 Collection.没有 API 请求直到您调用集合上的可枚举方法.Client#list_objects 将被多次调用，直到每个ObjectSummary 已生成.

—http://docs.aws.amazon.com/sdkforruby/api/Aws/S3/Bucket.html#objects-instance_method

How can I check if some folder exists in my s3 bucket using Ruby on Rails?

I’m using AWS:S3 official gem After initializing the global connection

AWS::S3::Base.establish_connection!(:access_key_id => 'my_key_id', :secret_access_key => ‘my_secret’) 

I have bucket named: myfirstbucket

With folder inside named: my_folder

With file inside my_folder named: my_pic.jpg

When I try to check if my_pic.jpg exist it work just fine

s3object.exists? "/my_folder/my_pic.jpg" , "myfirstbucket"
=>  True

How can I check only if the folder exists?

s3object = AWS::S3::S3Object
s3object.exists? "/my_folder/" , "myfirstbucket"
=>  False

解决方案

Use Bucket#objects:

bucket.objects({prefix: 'my/folder/'}).limit(1).any?

Returns a Collection of ObjectSummary resources. No API requests are made until you call an enumerable method on the collection. Client#list_objects will be called multiple times until every ObjectSummary has been yielded.

—http://docs.aws.amazon.com/sdkforruby/api/Aws/S3/Bucket.html#objects-instance_method

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