为最小 API 创建小写 URL

Question

说，我有以下最小值 API:

var builder = WebApplication.CreateBuilder(args);

// Routing options
builder.Services
  .Configure<RouteOptions>(options =>
  {
    options.LowercaseUrls = true;
    options.LowercaseQueryStrings = true;
  });

await using var app = builder.Build();

// API
app.MapGet("/api/customers/{id:int}", async (VRContext db, int id) =>
  await db.Customers.FindAsync(id) switch
  {
    { } customer => Results.Ok(customer),
    null => Results.NotFound(new { Requested_Id = id, Message = $"Customer not found." })
  });

//app.MapControllers();

await app.RunAsync();

当我传递不存在的 id 时，我得到以下 JSON:

{
  "requested_Id": 15,
  "message": "Customer not found."
}

问题是requested_Id中的字母I不是小写的，尽管我在Configure<RouteOptions>中配置了它。但是当我开始使用成熟的控制器时，我正确地得到 requested_id。如何使用 MapGet 实现相同的效果？

Answer 1

配置默认 Json 选项（注意 using 是正确的命名空间）

using Microsoft.AspNetCore.Http.Json;

var builder = WebApplication.CreateBuilder(args);

builder.Services.Configure<JsonOptions>(
    options =>
    {
        options.SerializerOptions.PropertyNamingPolicy = new LowerCaseNamingPolicy();
    });

await using var app = builder.Build();

// API
app.MapGet("/api/customers/{id:int}", (int id) =>
        Results.NotFound(new { Requested_Id = id, Message = $"Customer not found." })
        );

await app.RunAsync();

internal class LowerCaseNamingPolicy : JsonNamingPolicy
{
    public override string ConvertName(string name) => name.ToLowerInvariant();    
}

为最小 API 创建小写 URL

Make lowercase URLs for minimal API

c#

asp.net-core

minimal-apis