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Modern API Features (ASP.NET Core 7+)

Route Groups​

var productsApi = app.MapGroup("/api/products")
    .WithTags("Products")
    .RequireAuthorization()
    .WithOpenApi();

productsApi.MapGet("/", GetAll);
productsApi.MapGet("/{id}", GetById);
productsApi.MapPost("/", Create);

Endpoint Filters​

app.MapGet("/api/products/{id}", GetProduct)
    .AddEndpointFilter(async (context, next) =>
    {
        var id = context.GetArgument<int>(0);
        if (id <= 0)
            return Results.BadRequest("Invalid ID");

        return await next(context);
    });

Rate Limiting​

builder.Services.AddRateLimiter(options =>
{
    options.AddFixedWindowLimiter("fixed", options =>
    {
        options.Window = TimeSpan.FromSeconds(10);
        options.PermitLimit = 5;
    });
});

app.UseRateLimiter();

app.MapGet("/api/products", GetAll)
    .RequireRateLimiting("fixed");

Output Caching​

builder.Services.AddOutputCache(options =>
{
    options.AddBasePolicy(builder => builder.Cache());
});

app.UseOutputCache();

app.MapGet("/api/products", GetAll)
    .CacheOutput(policy => policy.Expire(TimeSpan.FromMinutes(5)));

Request Deduplication​

Built-in with output caching to handle duplicate concurrent requests.

Resources​