如何统计文件中的页数doc，docx使用ruby on rails

gem 'docx'
gem 'docsplit'

require 'docx'
require 'docsplit'

class PagesController < ApplicationController
  def count_pages
    file = params[:file]

    # 检查文件类型是否为doc或docx
    if file.content_type == 'application/msword' || file.content_type == 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
      # 将文件保存到服务器上
      File.open(Rails.root.join('public', 'uploads', file.original_filename), 'wb') do |f|
        f.write(file.read)
      end

      # 使用docsplit统计页数
      Docsplit.extract_length(Rails.root.join('public', 'uploads', file.original_filename))

      # 读取生成的txt文件并获取页数
      page_count = File.read(Rails.root.join('public', 'uploads', "#{file.original_filename}.txt")).to_i

      # 删除生成的txt文件和上传的文件
      File.delete(Rails.root.join('public', 'uploads', "#{file.original_filename}.txt"))
      File.delete(Rails.root.join('public', 'uploads', file.original_filename))

      render json: { page_count: page_count }
    else
      render json: { error: 'Invalid file format. Only doc and docx files are supported.' }
    end
  end
end

post '/count_pages', to: 'pages#count_pages'

<h1>统计文件页数</h1>

<form action="/count_pages" method="post" enctype="multipart/form-data">
  <input type="file" name="file" accept=".doc, .docx">
  <input type="submit" value="统计">
</form>

<div id="result"></div>

<script>
  document.querySelector('form').addEventListener('submit', function(e) {
    e.preventDefault();

    var formData = new FormData(this);

    fetch('/count_pages', {
      method: 'POST',
      body: formData
    })
    .then(response => response.json())
    .then(data => {
      document.getElementById('result').innerHTML = '文件页数：' + data.page_count;
    })
    .catch(error => {
      console.error('Error:', error);
    });
  });
</script>