Running faye on heroku using Rails 4 not working - ruby-on-rails

Question

I am trying to implement a chat feature in my rails app deployed on heroku . For this I have created two rails apps one my original app and the other to acts as faye server.
I have given the faye app url in my original app to create faye server object.
Following is what I have added in my original app:
Ruby version: 2.0.0
gemfile
gem 'thin'
gem 'faye'
gem 'rails', '4.1.5'
Application.rb
<%= javascript_include_tag 'http://xxx.herokuapp.com/faye.js' %>
Application.js
$(function(){
$(document).foundation();
var faye = new Faye.Client('http://xxx.herokuapp.com/faye');
faye.subscribe("/messages/new", function(data) {
eval(data);
});
});
Message Helper
def broadcast(channel, &block)
message = {:channel => channel, :data => capture(&block)}
uri = URI.parse("http://xxx.herokuapp.com/faye")
Net::HTTP.post_form(uri, :message => message.to_json)
end
Message Controller
class MessagesController < ApplicationController
def index
#messages = Message.all
end
def create
#message = Message.create!(message_params)
end
private
def message_params
params.require(:message).permit(:content)
end
end
My View:
messages/create.js.erb
<% broadcast "/messages/new" do %>
$("#chat").append("<%= escape_javascript render(#message) %>");
<% end %>
$("#new_message")[0].reset();
/messages/index.html.erb
<ul id="chat">
<%= render #messages %>
</ul>
<%= form_for Message.new, :remote => true do |f| %>
<%= f.text_field :content %>
<%= f.submit "Send" %>
<% end %>
Follwing is what I added in my faye server app:
faye.ru
require 'faye'
Faye::WebSocket.load_adapter('thin')
app = Faye::RackAdapter.new(:mount => '/faye', :timeout => 25)
run app
Procfile
web: bundle exec thin -p $PORT -e $RACK_ENV -R faye.ru start
I am getting a 500 internal sever error whenever I try to send a message. The code is working fine on local. Also I am getting Error during WebSocket handshake: Unexpected response code: 404 in chrome. I tried enabling cors but that did not helped either.
Note: Below are some reference links which are not working for me
Using rails sync gem with Faye and Thin in production mode on Heroku
https://blog.heroku.com/archives/2013/10/8/websockets-public-beta
This is not working heroku labs:enable websockets
I am new for heroku and faye.