discourse-chat-integration/app/controllers/public_controller.rb

class DiscourseChat::PublicController < ApplicationController
  requires_plugin DiscourseChat::PLUGIN_NAME

  def post_transcript
    params.require(:secret)

    redis_key = "chat_integration:transcript:#{params[:secret]}"
    content = $redis.get(redis_key)

    if content
      render json: { content: content }
    else
      raise Discourse::NotFound
    end
  end
end