c# - 如何使 Redis 缓存在部署在 IIS Express 上但在本地主机上工作的 asp.net 核心 Web 上工作

Question

我正在使用“Redis-x64-3.0.504”，我正在尝试在本地 IIS Express 上托管我的 asp.net core 2.2 Web 应用程序，但 Redis 缓存在 IIS 上无法正常运行，因为我似乎卡住了在访问或保存在缓存中时加载。但是 - 当我以本地主机身份运行 Visual Studio 时，它运行良好。

我在 ConfigureServices(IServiceCollection service) 中添加了 Microsoft.Extentions.Caching.StackExchangeRedis (2.2.5) nuget 和代码以进行配置。

代码如下所示:

services.AddStackExchangeRedisCache(options =>
{
    options.Configuration = "localhost";
    options.InstanceName = "SampleInstance";
});

然后我创建了一个 CacheHelper 类作为访问缓存的方法的泛型:

public static class CacheHelper
{
    public static void SaveInCache<T>(IDistributedCache memoryCache, string key, T value)
    {
        var graphJSON = JsonConvert.SerializeObject(value);
        memoryCache.SetStringAsync(key, graphJSON);
    }

    public static T GetFromCache<T>(IDistributedCache memoryCache, string key)
    {
        var cacheValue = memoryCache.GetStringAsync(key);
        return JsonConvert.DeserializeObject<T>(cacheValue.Result != null ? cacheValue.Result : string.Empty);
    }

    public static T GetMatchFromCache<T>(IDistributedCache memoryCache, string matchKey)
    {
        var redis = StackExchange.Redis.ConnectionMultiplexer.Connect("localhost");
        var db = redis.GetDatabase();
        var serverEndpoints = redis.GetEndPoints()[0];
        var keys = redis.GetServer(serverEndpoints).Keys(pattern: "*");

        foreach(var key in keys)
        {
            if (key.ToString().Contains(matchKey))
            {
                var trimmedKey = key.ToString().Substring(key.ToString().IndexOf(matchKey));
                return GetFromCache<T>(memoryCache, trimmedKey);
            }
        }

        return default(T);
    }

    public static List<T> GetAllMatchFromCache<T>(IDistributedCache memoryCache, string matchKey)
    {
        List<T> contentList = new List<T>();
        var redis = StackExchange.Redis.ConnectionMultiplexer.Connect("localhost");
        var db = redis.GetDatabase();
        var serverEndpoints = redis.GetEndPoints()[0];
        var keys = redis.GetServer(serverEndpoints).Keys(pattern: "*");

        foreach (var key in keys)
        {
            if (key.ToString().Contains(matchKey))
            {
                var trimmedKey = key.ToString().Substring(key.ToString().IndexOf(matchKey));
                var cacheReturn = GetFromCache<T>(memoryCache, trimmedKey);
                if (cacheReturn != null)
                {
                    contentList.Add(cacheReturn);
                }
            }
        }

        return contentList;
    }
}

我很困惑为什么这不能在 IIS 上工作，但在我的本地主机上工作。我怎样才能使它在 IIS 主机上工作呢？

Answer 1

在建立连接时尝试如下操作:

using (var muxer = ConnectionMultiplexer.Connect("localhost,resolvedns=1"))
        {
            muxer.PreserveAsyncOrder = preserveOrder;
            RedisKey key = "MBOA";
            var conn = muxer.GetDatabase();
            muxer.Wait(conn.PingAsync());

            Action<Task> nonTrivial = delegate
            {
                Thread.SpinWait(5);
            };
            var watch = Stopwatch.StartNew();
            for (int i = 0; i <= AsyncOpsQty; i++)
            {
                var t = conn.StringSetAsync(key, i);
                if (withContinuation) t.ContinueWith(nonTrivial);
            }
            int val = (int)muxer.Wait(conn.StringGetAsync(key));
            watch.Stop();

            Console.WriteLine("After {0}: {1}", AsyncOpsQty, val);
            Console.WriteLine("({3}, {4})\r\n{2}: Time for {0} ops: {1}ms; ops/s: {5}", AsyncOpsQty, watch.ElapsedMilliseconds, Me(),
                withContinuation ? "with continuation" : "no continuation", preserveOrder ? "preserve order" : "any order",
                AsyncOpsQty / watch.Elapsed.TotalSeconds);
        }

希望对您有所帮助。