如何将自定义服务添加到ActiveStorage [英] How to add a custom service to ActiveStorage

问题描述

我想向ActiveStorage添加自定义服务，因为我想覆盖

I want to add a custom service to ActiveStorage because I want to overwrite the url method of the ActiveStorage::Service::S3Service service so I can use a CloudFront CDN in front of my S3 bucket. I think I will not need the presigned_url params, I will just need the key, because the CloudFront instance will have full read access to the S3 bucket.

推荐答案

在 ActiveStorage :: Service 命名空间中添加一个对 ActiveStorage :: Service :: S3Service 进行子类化的类.覆盖要覆盖的方法.例如:

Add a class in the ActiveStorage::Service namespace that subclasses ActiveStorage::Service::S3Service. Override the methods you want to override. For example:

# lib/active_storage/service/cloudfront_s3_service.rb 
require "active_storage/service/s3_service"

class ActiveStorage::Service::CloudfrontS3Service < ActiveStorage::Service::S3Service
  def url(key, **)
    # ...
  end
end

在 config/storage.yml 中引用您的自定义服务:

Refer to your custom service in config/storage.yml:

production:
  service: CloudfrontS3
  access_key_id: ""
  secret_access_key: ""
  region: ""
  bucket: ""

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