From 253b06dfaa091d986a8714c081fd1e01679f538a Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Wed, 10 Feb 2021 02:03:06 +0800
Subject: ...

---
 BackEnd/Timeline/Helpers/DataCacheHelper.cs | 125 ----------------------------
 1 file changed, 125 deletions(-)
 delete mode 100644 BackEnd/Timeline/Helpers/DataCacheHelper.cs

(limited to 'BackEnd/Timeline/Helpers/DataCacheHelper.cs')

diff --git a/BackEnd/Timeline/Helpers/DataCacheHelper.cs b/BackEnd/Timeline/Helpers/DataCacheHelper.cs
deleted file mode 100644
index 1ad69708..00000000
--- a/BackEnd/Timeline/Helpers/DataCacheHelper.cs
+++ /dev/null
@@ -1,125 +0,0 @@
-using Microsoft.AspNetCore.Http;
-using Microsoft.AspNetCore.Mvc;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Logging;
-using Microsoft.Net.Http.Headers;
-using System;
-using System.Linq;
-using System.Threading.Tasks;
-using Timeline.Models.Http;
-using static Timeline.Resources.Helper.DataCacheHelper;
-
-namespace Timeline.Helpers
-{
-    public interface ICacheableData
-    {
-        string Type { get; }
-#pragma warning disable CA1819 // Properties should not return arrays
-        byte[] Data { get; }
-#pragma warning restore CA1819 // Properties should not return arrays
-        DateTime? LastModified { get; }
-    }
-
-    public class CacheableData : ICacheableData
-    {
-        public CacheableData(string type, byte[] data, DateTime? lastModified)
-        {
-            Type = type;
-            Data = data;
-            LastModified = lastModified;
-        }
-
-        public string Type { get; set; }
-#pragma warning disable CA1819 // Properties should not return arrays
-        public byte[] Data { get; set; }
-#pragma warning restore CA1819 // Properties should not return arrays
-        public DateTime? LastModified { get; set; }
-    }
-
-    public interface ICacheableDataProvider
-    {
-        Task<string> GetDataETag();
-        Task<ICacheableData> GetData();
-    }
-
-    public class DelegateCacheableDataProvider : ICacheableDataProvider
-    {
-        private readonly Func<Task<string>> _getDataETagDelegate;
-        private readonly Func<Task<ICacheableData>> _getDataDelegate;
-
-        public DelegateCacheableDataProvider(Func<Task<string>> getDataETagDelegate, Func<Task<ICacheableData>> getDataDelegate)
-        {
-            _getDataETagDelegate = getDataETagDelegate;
-            _getDataDelegate = getDataDelegate;
-        }
-
-        public Task<ICacheableData> GetData()
-        {
-            return _getDataDelegate();
-        }
-
-        public Task<string> GetDataETag()
-        {
-            return _getDataETagDelegate();
-        }
-    }
-
-    public static class DataCacheHelper
-    {
-        public static async Task<ActionResult> GenerateActionResult(Controller controller, ICacheableDataProvider provider, TimeSpan? maxAge = null)
-        {
-            const string CacheControlHeaderKey = "Cache-Control";
-            const string IfNonMatchHeaderKey = "If-None-Match";
-            const string ETagHeaderKey = "ETag";
-
-            string GenerateCacheControlHeaderValue()
-            {
-                var cacheControlHeader = new CacheControlHeaderValue()
-                {
-                    NoCache = true,
-                    NoStore = false,
-                    MaxAge = maxAge ?? TimeSpan.FromDays(14),
-                    Private = true,
-                    MustRevalidate = true
-                };
-                return cacheControlHeader.ToString();
-            }
-
-            var loggerFactory = controller.HttpContext.RequestServices.GetRequiredService<ILoggerFactory>();
-            var logger = loggerFactory.CreateLogger(typeof(DataCacheHelper));
-
-            var eTagValue = await provider.GetDataETag();
-            eTagValue = '"' + eTagValue + '"';
-            var eTag = new EntityTagHeaderValue(eTagValue);
-
-
-            if (controller.Request.Headers.TryGetValue(IfNonMatchHeaderKey, out var value))
-            {
-                if (!EntityTagHeaderValue.TryParseStrictList(value, out var eTagList))
-                {
-                    logger.LogInformation(Log.Format(LogBadIfNoneMatch, ("Header Value", value)));
-                    return controller.BadRequest(ErrorResponse.Common.Header.IfNonMatch_BadFormat());
-                }
-
-                if (eTagList.FirstOrDefault(e => e.Equals(eTag)) != null)
-                {
-                    logger.LogInformation(LogResultNotModified);
-                    controller.Response.Headers.Add(ETagHeaderKey, eTagValue);
-                    controller.Response.Headers.Add(CacheControlHeaderKey, GenerateCacheControlHeaderValue());
-
-                    return controller.StatusCode(StatusCodes.Status304NotModified, null);
-                }
-            }
-
-            var data = await provider.GetData();
-            logger.LogInformation(LogResultData);
-            controller.Response.Headers.Add(CacheControlHeaderKey, GenerateCacheControlHeaderValue());
-            return controller.File(data.Data, data.Type, data.LastModified, eTag);
-        }
-
-        public static Task<ActionResult> GenerateActionResult(Controller controller, Func<Task<string>> getDataETagDelegate, Func<Task<ICacheableData>> getDataDelegate, TimeSpan? maxAge = null)
-        {
-            return GenerateActionResult(controller, new DelegateCacheableDataProvider(getDataETagDelegate, getDataDelegate), maxAge);
-        }
-    }
-}
-- 
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