HerCacheUnmodified

Easy way to begin support 304 status, so on ther side if data was not changed You will load it from local cache. Of course, other side must support Of course, other side must support 304 status also.

At the very begonning you have to include this middleware to Her

# config/initilizers/her.rb
...
  Her::API.new.setup do |connection|
    ...
    connection.use Her::Middleware::CacheUnmodified
  end

Here is Rails controller example with this support:

class Post < ApplicationController
  before_action :check_changes

   private

   def check_changes
     return unless request.headers['HTTP_IF_MODIFIED_SINCE']
     return if request.headers['HTTP_IF_MODIFIED_SINCE'].to_datetime > resource.updated_at
     render body: nil, status: 304
  end
end

Feel free to update is as you like

Add this line to your application's Gemfile:

gem 'her_cache_unmodified'

And then execute:

$ bundle

Or install it yourself as:

$ gem install her_cache_unmodified

Contribution directions go here.

The gem is available as open source under the terms of the MIT License.