Duplicate chunks on JSON response

Question

I've got a fairly standard MEAN project setup with the angular-fullstack generator using yeoman.

What I'm finding is that when GETting a largish (over 65536 bytes) json result, it is encoded using gzip and chunked, but the json returned is not valid viewed either in chrome or consumed by my angular client $resource because it contains TWO responses! e.g {name:'hi'}{name:'hi'} for a single id or [{..},{..}][{..},{..}] for a array.

The server api endpoint was autogenerated from the angular-fullstack generator and looks something like:

// Get list of worlds
exports.index = function(req, res) {
  World.find(function (err, worlds) {
    if(err) { return handleError(res, err); }
    res.json(200, worlds);
  });
};

If i slice the data so it's not chunked, then the json is well formed. I've checked the mongo db and the data is ok there too and debugging the worlds variable, I can JSON.stringify and get the expected string result without any duplicates. but the moment it's sent, I'm getting a doubling up of json result on the response.

Update for comment

angular-fullstack 2.0.4

the schema looks like:

'use strict';

var mongoose = require('mongoose'),
    Schema = mongoose.Schema;

var WorldSchema = new Schema({
  name: String,
  info: String,
  active: Boolean,
  tiles: [Schema.Types.Mixed]
});

module.exports = mongoose.model('World', WorldSchema);

seeded with:

 var newWorld = new WorldModel({
                    _id: planet._objectId,
                    name: "SimDD World",
                    tiles : seed()
                });
                newWorld.save();

...

var seed = function () {
    var data = [];
    for (var i = 0; i < planet.HEIGHT; i++) {
        for (var j = 0; j < planet.WIDTH; j++) {
            data.push({
                coords:{
                    x:i,
                    y:j
                },
                type:'.'
            });
        }
    }
    return data;
}

Answer 1

// app.use(require('connect-livereload')());

I came across the same problem when building my angular-fullstack app (thanks, DaftMonk), after some extensive debugging using node-inspector, turns out the JSON data gets passed to the livereload module and gets duplicated when it comes out. Disabling this middleware eliminated the problem for me.