SendGrid Event Webhooks Controller

send_grid_example_controller.rb

class SendGridExampleController < ApplicationController

  # code excerpt ... 

  def parse_event

    unless params[:event].present?
      result = {:msg => ABORTED, :success => false}
    end

    result = {:msg => "Parse #{params[:event]}", :success => true}

    begin
      case params[:event]
      when "bounce"
        if Set.new(["status","reason","type","email"]).subset? params.keys.to_set
          # update the corresponding User record as bounced
        else
          result = {:msg => INVALID, :keys => params.keys}
        end
      when "spamreport", "blocked"
        if Set.new(["timestamp","event","email"]).subset? params.keys.to_set
          # update the corresponding User record as unsubscribed
        else
          result = {:msg => INVALID, :keys => params.keys}
        end
      else
        result = {:msg => "Ignored #{params[:event]}"}
      end

    rescue Exception => e
      # log the incoming params to a yaml file so we can add another test case if necessary
      # notify us of the error, then tell SendGrid not to retry
    ensure
      # result[:success] = false unless result.is_a?(Hash) && result.has_key?(:success)
      render :text => result.to_json, :layout => false
    end
  end
  
end