Google API Client for Ruby でGoogleDriveにアップロード

S3などのオブジェクトストレージと比べて面倒

• フォルダを作る必要がある
• 同名のフォルダを複数作成できてしまう

gem 'google-api-client'

require 'googleauth'
require 'google/apis/drive_v3'

FOLDER_ID = "xxxxxxxxxxxxxxxxxxxxxx" # https://drive.google.com/drive/folders/xxxxxxxxxxxxxxxxxxxxxx
UPLOAD_FILE_PATH = "/path/to/file.txt"

service_account_key_json = File.read("path/to/service-account.key.json")
drive_folder_id = FOLDER_ID

authorizer = Google::Auth::ServiceAccountCredentials.make_creds(
  json_key_io: StringIO.new(service_account_key_json),
  scope: 'https://www.googleapis.com/auth/drive'
)
authorizer.fetch_access_token!

drive = Google::Apis::DriveV3::DriveService.new
drive.authorization = authorizer

drive.create_file(
  {
    name: "file.txt",
    parents: [drive_folder_id],
    modifiedTime: File::Stat.new(UPLOAD_FILE_PATH).mtime
  },
  upload_source: UPLOAD_FILE_PATH 
)

任意のフォルダを作成してアップロード

ちゃんとやるなら排他制御なども考える必要がありそうです。

require 'googleauth'
require 'google/apis/drive_v3'

FOLDER_ID = "xxxxxxxxxxxxxxxxxxxxxx" # https://drive.google.com/drive/folders/xxxxxxxxxxxxxxxxxxxxxx
UPLOAD_FILE_PATH = "/path/to/file.txt"

service_account_key_json = File.read("path/to/service-account.key.json")
drive_folder_id = FOLDER_ID

authorizer = Google::Auth::ServiceAccountCredentials.make_creds(
  json_key_io: StringIO.new(service_account_key_json),
  scope: 'https://www.googleapis.com/auth/drive'
)
authorizer.fetch_access_token!

drive = Google::Apis::DriveV3::DriveService.new
drive.authorization = authorizer

# 必要なフォルダがある確認してなければ作成する
folders = "path/to/folder".split("/")
upload_folder_id = folders.each_with_object([drive_folder_id]) { |folder_name, folder_ids|
  folder = drive.list_files(
    q: "mimeType='application/vnd.google-apps.folder' and '#{folder_ids.last}' in parents and name = '#{folder_name}'",
    page_size: 1
  ).files.first
  if folder
    # noop
  else
    folder = drive.create_file({
      name: folder_name,
      mime_type: 'application/vnd.google-apps.folder',
      parents: [folder_ids.last],
    }, fields: 'id')
  end
  folder_ids.push(folder.id)
}.last

drive.create_file(
  {
    name: "file.txt",
    parents: [upload_folder_id],
    modifiedTime: File::Stat.new(UPLOAD_FILE_PATH).mtime
  },
  upload_source: UPLOAD_FILE_PATH 
)