Meteor wrapAsync not returning value on client

Question

I am trying to use Meteor.wrapAsync to upload a file using Slingshot and then get the upload URL. I've created the function, but image_url ends up being undefined when I run it. The image does successfully upload though.

Getting the image url

var uploadSlingshotFileSync = Meteor.wrapAsync(uploadSlingshotFile);
image_url = uploadSlingshotFileSync(image_file);
console.log(image_url);

Function

uploadSlingshotFile = function(file, callback) {
  var uploader = new Slingshot.Upload("photoUploads");
  uploader.send(file, function (error, uploadURL) {
    callback(null, uploadURL);
  });
};

Is there anything I am missing with the syntax of wrapAsync?

Answer 1

WrapAsync 使函数仅在服务器上看起来是同步的，因为 Fiber 在客户端上不可用。