Read CollectionFS file from server's filesystem when hosted on meteor.com

Question

Im trying let the user Upload a txt file and then let him click a button "analyze" and then perform some analysis.

I have the app working locally, Im using FS.Collection and FileSystem however I had several problems deploying to meteor.com. Here is my collection:

FS.debug = true;

Uploads = new FS.Collection('uploads', {
    stores: [new FS.Store.FileSystem('uploads')]
});

and here is how I try to read the uploaded file:

var fs = Npm.require('fs');
var readedFile = fs.readFileSync(process.env.PWD+'/.meteor/local/cfs/files/uploads/+file.copies.uploads.key, 'utf-8');

The above works in local but not after I deploy to meteor.com, in the debug messages I see something like this: Error: ENOENT, no such file or directory

So I do not know how to read the file when the app is deployed, how would you do it?, or do you think I should deploy the app to Amazon EC2? Im afraid to deploy to amazon and have the same problem...

Answer 1

Short example of using http to download a file that was uploaded via collectionFS.

var file = Uploads.findOne({ _id: myId }); // or however you find it
  HTTP.get(file.url(),function(err,result){
    // this will be async obviously
    if ( err ) console.log("Error "+err+" downloading file"+myId);
    else {
      var content = result.content; // the contents of the file
      // now do something with it
    }
  });

Note that you must meteor add http to get access to the http package.