Sinet.CacheService/Program.cs

using Microsoft.Extensions.Caching.Distributed;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddStackExchangeRedisCache(options =>
{
    options.Configuration = builder.Configuration["Redis"];
    options.InstanceName = "CacheData_";
});

var app = builder.Build();

var CacheDictionary = new Dictionary<string, string>();

// Configure the HTTP request pipeline.

app.MapPost("/CacheData/Set", async (HttpRequest request, IDistributedCache cache, string key) =>
{
    string body = "";
    using (StreamReader stream = new StreamReader(request.Body))
    {
        body = await stream.ReadToEndAsync();
    }
    cache.SetString(key, body);
    Console.WriteLine($"{DateTime.Now:yyyy-MM-dd HH:mm:ss} [{key}[update to [{body}] ");
    return "success";
});

app.MapGet("/CacheData/Get", (HttpContext httpContext, IDistributedCache cache, string key) =>
{
    var cacheString = cache.GetString(key);
    if (!string.IsNullOrWhiteSpace(cacheString))
    {
        httpContext.Response.ContentType = "application/json";
        return cacheString;
    }
    else
    {
        httpContext.Response.StatusCode = 404;
        return string.Empty;
    }
});

app.Run();