seepur/app/Controllers/Http/BookApiController.js

'use strict'
const FileUtils = use('App/Utils/FileUtils');
class BookApiController {
  async getPage({request, book, response}) {
    const pageNumber = Number(request.params.pageNumber);
    const file =
        await FileUtils.getFile(`books/${book.book_folder}/${pageNumber}.jpg`);
    if (file)
      response.send(file);
    else
      return {
        code: 404, message: 'no file'
      }
  }
  async getThumbnail({request, book, response}) {
    const file = await FileUtils.getFile(`books/${book.book_folder}/1.jpg`);
    if (file)
      response.send(file);
    else
      return {
        code: 404, message: 'no file'
      }
  }
}

module.exports = BookApiController