ActiveStorage DirectUpload via Faraday

script.rb

require "faraday"
require "faraday/multipart"

token = ARGV.shift

absolute_path = File.expand_path(ARGV.shift)

# TODO how could we require "active_storage/blob" without eager loading the whole app
blob = ActiveStorage::Blob.build_after_unfurling(io: File.open(absolute_path), filename: File.basename(absolute_path))

conn_pre = Faraday.new(
  url: "http://localhost:3000",
) do |f|
  f.request :url_encoded
end

res_pre = conn_pre.post("/rails/active_storage/direct_uploads", {blob: blob.attributes.slice("filename", "byte_size", "checksum", "content_type", "metadata")})

json = JSON.parse(res_pre.body) if res_pre.body.present?

puts "Reponse Status Code: #{res_pre.status}"

exit unless res_pre.status == 200

direct_upload_data = json&.fetch("direct_upload")

conn_blob = Faraday.new(
  url: "http://localhost:3000",
  headers: direct_upload_data["headers"].merge({"Content-Length" => blob.byte_size.to_s, "Transfer-Encoding" => "chunked"})
) do |f|
  f.request :multipart
  f.adapter Faraday.default_adapter
end

res_blob = conn_blob.put(direct_upload_data["url"], Faraday::UploadIO.new(
  absolute_path,
  blob.content_type
))

puts "Success" if res_blob.status >= 200 && res_blob.status < 300