Episodes

File Uploads and Cloud Storage

Episode #356 by Teacher's Avatar David Kimura

Summary

AWS S3 has been a reliable service over the years and for a long time it was the only option. However, in the past few years, there has been more cloud storage options that have popped up with compatible S3 APIs. These services can sometimes offer better pricing and speeds.
rails uploads active storage 15:48

Resources

Summary

# Terminal
bundle add aws-sdk-s3
rails g scaffold pictures name
rails active_storage:install
yarn add @rails/activestorage

# app/javascript/application.js
import * as ActiveStorage from "@rails/activestorage"
ActiveStorage.start()

# models/picture.rb
class Picture < ApplicationRecord
  has_one_attached :image
end

# views/pictures/_form.html.erb
<div class="mb-3">
  <%= form.label :image, class: 'form-label' %>
  <%= form.file_field :image, class: 'form-control', direct_upload: true %>
</div>

# views/pictures/_picture.html.erb
<%= image_tag url_for(picture.image) if picture.image.attached? %>

# pictures_controller.rb
def picture_params
  params.require(:picture).permit(:name, :image)
end

# config/environments/production.rb
config.active_storage.service = :cloud

# config/storage.yml
# Wasabi
# cloud:
#   service: S3
#   endpoint: https://s3.wasabisys.com
#   access_key_id: <%= ENV['ACCESS_KEY_ID'] %>
#   secret_access_key: <%= ENV['SECRET_ACCESS_KEY'] %>
#   region: <%= ENV['REGION_NAME'] %>
#   bucket: <%= ENV['BUCKET_NAME'] %>

# Backblaze B2
# cloud:
#   service: S3
#   endpoint: https://YOURBUCKETNAME.s3.us-west-000.backblazeb2.com
#   access_key_id: <%= ENV['ACCESS_KEY_ID'] %>
#   secret_access_key: <%= ENV['SECRET_ACCESS_KEY'] %>
#   region: <%= ENV['REGION_NAME'] %>
#   bucket: <%= ENV['BUCKET_NAME'] %>
#   force_path_style: true

# Cloudflare R2
cloud:
  service: S3
  endpoint: https://YOURACCOUNTID.r2.cloudflarestorage.com/example
  access_key_id: <%= ENV['ACCESS_KEY_ID'] %>
  secret_access_key: <%= ENV['SECRET_ACCESS_KEY'] %>
  region: auto
  bucket: <%= ENV['BUCKET_NAME'] %>

# Backblaze B2 CLI tool
https://www.backblaze.com/b2/docs/quick_command_line.html

chmod +x b2-darwin
./b2-darwin authorize-account
./b2-darwin update-bucket --corsRules '[
    {
        "corsRuleName": "downloadFromAnyOriginWithUpload",
        "allowedOrigins": [
            "*"
        ],
        "allowedHeaders": [
            "*"
        ],
        "allowedOperations": [
            "s3_put"
        ],
        "maxAgeSeconds": 3600
    }
]' exampledr allPublic