ResponseCache

What is ResponseCache?

ResponseCache is a lightweight library that is used to cache API responses by simply putting ResponseCache attribute to the endpoint you want to cache.

Setup

NuGet install:

Install-Package ResponseCache

Memory Cache configuration

services.AddMemoryCache();
services.AddInMemoryResponseCache();

Redis Cache configuration

First we bind cache settings with configuration values from appsettings.json then we add the service

var cacheSettings = new CacheSettings();
Configuration.GetSection(nameof(CacheSettings)).Bind(cacheSettings);
services.AddSingleton(cacheSettings);

services.AddSingleton<IConnectionMultiplexer>(_ => ConnectionMultiplexer.Connect(cacheSettings.ConnectionString));
services.AddDistributedRedisCache(options => options.Configuration = cacheSettings.ConnectionString);

services.AddDistributedResponseCache();

Add this to appsettings.json

  "CacheSettings": {
    "ConnectionString": "localhost:6379"
  },

Usage

[ResponseCache(TTL)] attribute where TTL is an integer representing cache living time in seconds.

Example

e.g. Cache response list of products for 1 minute

[ApiController]
[Route("[controller]")]
public class ProductsController : ControllerBase
{
    private readonly DbContext _context;

    public ProductsController(DbContext context)
    {
        _context = context;
    }

    [HttpGet]
    [ResponseCache(60)]
    public async Task<IActionResult> List()
    {
        return Ok(await _context.Products.ToListAsync());
    }
}