Exploring the possibilities of using AngularJS for AJAX functionality in a Ruby On Rails

I recently started learning AngularJS and Rails, and I attempted to develop a Rails application incorporating AngularJS.

Currently, I am looking to make a POST request to send data and insert it into the database.

In the Activity Controller:

def create
        @activity = Activity.new(params[:activity])

        respond_to do |format|
            if @activity.save
                format.html {redirect_to activities_url}
                format.json { render activities_url, status: :created, location: @activity}
            end
        end

end

In the Activity Coffee JS:

app = module('activity', ['ngAnimate'])
app.controller 'FormCtrl', ($scope, $http) ->
    config = {
        header: {
            'Content-Type': 'application/json'
        }
    }
    @test = ->
        $http.post('/activities.json', {title: 'test1'}, config).success (data, status) ->
            console.log(data)
            console.log(status)
return

Console log:

Started POST "/activities.json" for ::1 at 2016-05-04 21:06:10 +0800
Processing by ActivitiesController#create as JSON
  Parameters: {"title"=>"test1", "activity"=>{"title"=>"test1"}}
Can't verify CSRF token authenticity
Completed 422 Unprocessable Entity in 2ms (ActiveRecord: 0.0ms)

I added a button with ng-click to trigger the test function but encountered errors as shown in the console log. How can I resolve this issue?

Answer №1

If you're looking for a solution, check out this informative answer at this link about Rails API design without disabling CSRF protection

The essence of the approach is placing the CSRF token in a cookie named XSRF-TOKEN like demonstrated below:

# Within my ApplicationController
after_filter :set_csrf_cookie

def set_csrf_cookie
  if protect_against_forgery?
    cookies['XSRF-TOKEN'] = form_authenticity_token
  end
end

You'll need to customize the verified_request? method in your ApplicationController to fetch the token from where Angular will provide it:

protected

def verified_request?
  super || valid_authenticity_token?(session, request.headers['X-XSRF-TOKEN'])
end

(Make sure to read through the provided link as there are some important considerations mentioned. In general, login actions should not be guarded against csrf, but other possible destructive actions should. This can be achieved using skip_before_filter.)

This should point you in the right direction!

Answer №2

In my opinion, the most efficient way to accomplish this task is by utilizing the helper method form_authenticity_token.

$http({
  method: 'POST',
  url: '<%= some_path %>',
  params: { 
    authenticity_token: '<%= form_authenticity_token %>',
    ... // Other params
  }
})

I strongly advise against disabling CSRF protection as there are better alternatives available.

Answer №3

One of the unique features of Rails is its built-in protection against Cross Site Request Forgery (CSRF) attacks. This security measure ensures that requests made to the web API are coming from legitimate sources, preventing unauthorized access.

If you're encountering issues with this feature in single-page AJAX apps, a quick solution would be to disable CSRF for specific actions in your Controller by adding:

protect_from_forgery :except => :create

For more information on how Rails handles CSRF, you can refer to the official documentation. Feel free to reach out if you have any further questions!

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