问在EpiServer中将整个页面树序列化为JSON

EN

using EPiServer;
using EPiServer.Core;
using EPiServer.DataAbstraction;
using EPiServer.DataAnnotations;
using EPiServer.ServiceLocation;
using EPiServer.Web.Mvc;
using Newtonsoft.Json;
using System.Collections.Generic;
using System.Dynamic;
using System.Reflection;
using System;
using System.Runtime.Caching;
using System.Linq;
using Newtonsoft.Json.Linq;
using EPiServer.Framework;
using EPiServer.Framework.Initialization;

namespace NUON.Models.MyCorp
{
    public class MyCorpPageController : PageController<MyCorpPage>
    {
        public string Index(MyCorpPage currentPage)
        {
            Response.ContentType = "text/json";

            // check if the JSON is cached - if so, return it
            ObjectCache cache = MemoryCache.Default;
            string cachedJSON = cache["myCorpPageJson"] as string;
            if (cachedJSON != null)
            {
                return cachedJSON;
            }

            var output = new ExpandoObject();
            var outputDict = output as IDictionary<string, object>;

            var pageRouteHelper = ServiceLocator.Current.GetInstance<EPiServer.Web.Routing.PageRouteHelper>();
            var pageReference = pageRouteHelper.PageLink;

            var contentLoader = ServiceLocator.Current.GetInstance<IContentLoader>();
            var children = contentLoader.GetChildren<PageData>(currentPage.PageLink).OfType<PageData>();
            var toOutput = new { };

            var jsonResultObject = new JObject();

            foreach (PageData page in children)
            {
                // Name = e.g. BbpbannerProxy . So remove "Proxy" and add the namespace
                var classType = Type.GetType("NUON.Models.MyCorp." + page.GetType().Name.Replace("Proxy", string.Empty));
                // Only keep the properties from this class, not the inherited properties
                jsonResultObject.Add(page.PageName, GetJsonObjectFromType(classType, page));
            }

            // add to cache
            CacheItemPolicy policy = new CacheItemPolicy();
            // expire the cache daily although it will be cleared whenever content changes.
            policy.AbsoluteExpiration = DateTimeOffset.Now.AddDays(1.0);
            cache.Set("myCorpPageJson", jsonResultObject.ToString(), policy);

            return jsonResultObject.ToString();
        }

        [InitializableModule]
        [ModuleDependency(typeof(EPiServer.Web.InitializationModule),
                  typeof(EPiServer.Web.InitializationModule))]
        public class EventsInitialization : IInitializableModule
        {
            public void Initialize(InitializationEngine context)
            {
                var events = ServiceLocator.Current.GetInstance<IContentEvents>();
                events.PublishedContent += PublishedContent;
            }

            public void Preload(string[] parameters)
            {
            }

            public void Uninitialize(InitializationEngine context)
            {
            }

            private void PublishedContent(object sender, ContentEventArgs e)
            {
                // Clear the cache because some content has been updated
                ObjectCache cache = MemoryCache.Default;
                cache.Remove("myCorpPageJson");
            }
        }

        private static JObject GetJsonObjectFromType(Type classType, object obj)
        {
            var jsonObject = new JObject();
            var properties = classType.GetProperties(BindingFlags.Public
                | BindingFlags.Instance
                | BindingFlags.DeclaredOnly);

            foreach (var property in properties)
            {
                var jsonAttribute = property.GetCustomAttributes(true).FirstOrDefault(a => a is JsonPropertyAttribute);
                var propertyName = jsonAttribute == null ? property.Name : ((JsonPropertyAttribute)jsonAttribute).PropertyName;

                if (property.PropertyType.BaseType == typeof(BlockData))
                    jsonObject.Add(propertyName, GetJsonObjectFromType(property.PropertyType, property.GetValue(obj)));
                else
                {
                    var propertyValue = property.PropertyType == typeof(XhtmlString) ? property.GetValue(obj)?.ToString() : property.GetValue(obj);
                    if (property.PropertyType == typeof(string))
                    {
                        propertyValue = propertyValue ?? String.Empty;
                    }
                    jsonObject.Add(new JProperty(propertyName, propertyValue));
                }
            }
            return jsonObject;
        }
    }

    [ContentType(DisplayName = "MyCorpPage", GroupName = "MyCorp", GUID = "bc91ed7f-d0bf-4281-922d-1c5246cab137", Description = "The main MyCorp page")]
    public class MyCorpPage : PageData
    {
    }
}