在我的koa.js应用程序中，我正在调用一个从数据库获取数据的函数。该路线如下所示：
class MyMailer < Devise::Mailer
helper :application # gives access to all helpers defined within `application_helper`.
include Devise::Controllers::UrlHelpers # Optional. eg. `confirmation_url`
default template_path: 'devise/mailer' # to make sure that your mailer uses the devise views
include DefaultUrlOptions
end
现在，我想将此数据（在router.post("/data", async ctx => {
const info = await controller.getData(
ctx.request.body.from,
ctx.request.body.to
);
ctx.body = info;
/*
*** EXPECTING SOMETHING LIKE THIS TO INVOKE DOWNLOAD OF THE BROWSER ***
let fname = "info_" + String(Number(new Date())) + ".txt";
ctx.set('Content-disposition', `attachment; filename=${fname}`);
ctx.statusCode = 200;
ctx.body = fs.createReadStream(info);
*/
});
JSON变量中）作为文件发送到客户端（Web浏览器），以便浏览器下载它。