如何将上传文件类型转换为graphql UploadFile类型？

npm install apollo-upload-server

const { ApolloServer } = require('apollo-server');
const { GraphQLUpload } = require('apollo-upload-server');

// 其他导入语句...

// 定义GraphQL类型
const typeDefs = `
  scalar Upload

  type Mutation {
    uploadFile(file: Upload!): String
  }
  
  // 其他类型定义...
`;

// 定义GraphQL解析器
const resolvers = {
  Mutation: {
    uploadFile: async (_, { file }) => {
      // 处理上传文件
      const { createReadStream, filename, mimetype, encoding } = await file;
      // 这里可以使用腾讯云的相关产品进行文件上传、存储等操作
      // 返回文件处理结果
      return `File ${filename} uploaded successfully!`;
    },
  },
  // 其他解析器定义...
};

// 创建Apollo服务器
const server = new ApolloServer({
  typeDefs,
  resolvers,
});

// 启动服务器
server.listen().then(({ url }) => {
  console.log(`Server running at ${url}`);
});