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# frozen_string_literal: true
# Creates a new blob on the server side in anticipation of a direct-to-service upload from the client side.
# When the client-side upload is completed, the signed_blob_id can be submitted as part of the form to reference
# the blob that was created up front.
class ActiveStorage::DirectUploadsController < ActiveStorage::BaseController
def create
blob = ActiveStorage::Blob.create_before_direct_upload!(**blob_args)
render json: direct_upload_json(blob)
end
private
def blob_args
params.require(:blob).permit(:filename, :byte_size, :checksum, :content_type, :metadata).to_h.symbolize_keys
end
def direct_upload_json(blob)
blob.as_json(root: false, methods: :signed_id).merge(direct_upload: {
url: blob.service_url_for_direct_upload,
headers: blob.service_headers_for_direct_upload
})
end
end
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