Sinatra から Google Drive への雑なアップロードサンプル

Gemfile

source 'https://rubygems.org'

gem 'dotenv'
gem 'google_drive', github: 'holysugar/google-drive-ruby', branch: 'upload-in-collection'
gem 'sinatra'
gem 'haml'
gem 'pry'

upload_drive_sample.rb

require 'sinatra'
require 'haml'
require 'google_drive'

def drive_session
  @drive_session ||= GoogleDrive.saved_session("config.json")
end

def collection
  # サンプルって名前のフォルダを作っておく（あるいはIDで取得して file_by_id) 
  drive_session.collection_by_title("サンプル")
  # drive_session.file_by_id(ENV['DRIVE_FOLDER_ID'])
end

# アクセストークンの取得
if !File.exist?("config.json") && (ENV['GOOGLE_CLIENT_ID'] || ENV['REFRESH_TOKEN'])
  if ENV['REFRESH_TOKEN']
    hash = { "refresh_token": ENV['REFRESH_TOKEN'] }
  else
    hash = {
      "client_id": ENV['GOOGLE_CLIENT_ID'],
      "client_secret": ENV['GOOGLE_CLIENT_SECRET'],
    }
  end
  File.write("config.json", hash.to_json)
end
drive_session

get '/' do
  @filelist = collection.files
  haml :index
end

post '/upload' do
  if params[:file]
    name = params[:name] || "名無しさん"
    filename = "#{name}_#{params[:file][:filename]}"
    drive_session.upload_from_io(params[:file][:tempfile], filename, convert: false, parents: collection)
    @message = 'アップロード成功'
  else
    @message = 'アップロード失敗'
  end
  redirect "/"
end

views__index.haml

!!!html5
%html
  %body
    %p= @message
    %form{:action => "./upload", :method => "post", :enctype => "multipart/form-data"}
      %input{:type => "text", :name => "name", :value => "でふぉるとなまえ"}
      %input{:type => "file", :name => "file"}
      %input{:type => "submit", :name => "submit"}
    %h2 filelist
    %ul
    - @filelist.each do |file|
      %li&= file.title