Using meteor upload how can the cleint get the url of the file on the server

help
1

How can the client get the url after the file has been uploaded using meteor uploads, and put it in a string.

2

I think it would be helpful for people to have more context or even example code about this question.

3

I am trying to put a pure photo post, feature next to my articles on the page. I am using the same controller to subscribe to both articles and photos posts. What i need to do that is the url of the stored photo and a category field in the same mongo collocation the admin user sets the category and uploads the image but once the image is uploaded i need the url address so I can insert the doc into mongodb.

example of base mongo collection template

Meteor.methods({
photoInsert: function(photoAttributes) {
check(this.url, String);
check(photoAttributes, {
  url: String, //needs to be auto set after upload.
  category:String //admin user set

});