.Net Core 3 - api - XML 和 JSON 格式根据 URL 请求输出 (.xml, .json)

Question

我正在尝试弄清楚如何设置内容协商，以便应用程序服务器根据请求提供 xml 或 json。

我已经尝试了多种您可以在互联网上找到的东西，包括 microsoft documentation 但无济于事。（您会在我的注释代码中看到这一点）。我试过将所有选项放入 .AddMvc，删除所有选项等。我只是不知道接下来要尝试什么

这是 ConfigureServices 调用的初始部分

public void ConfigureServices(IServiceCollection services)
    {
        services.AddControllersWithViews();
        //services.AddControllers().AddXmlSerializerFormatters();
        services.AddControllers().AddNewtonsoftJson();
        services.AddControllers(options =>
        {
            options.ReturnHttpNotAcceptable = true;
            options.OutputFormatters.RemoveType<HttpNoContentOutputFormatter>();
            options.OutputFormatters.Add(new XmlSerializerOutputFormatter());

            options.FormatterMappings.SetMediaTypeMappingForFormat(
                                         "xml", "application/xml");
        });
        //services.AddControllers(options =>
        //{
        //    options.FormatterMappings.SetMediaTypeMappingForFormat
        //        ("xml", MediaTypeHeaderValue.Parse("application/xml"));
        //}).AddXmlSerializerFormatters().AddXmlDataContractSerializerFormatters();

这是我在控制器中进行设置的尝试

[Route("api/[controller]")]
[ApiController]
[FormatFilter]
public class PulpTestsController : ControllerBase
{
    private readonly DatabaseContext _context;

    public PulpTestsController(DatabaseContext context)
    {
            _context = context;
    }

    // GET: api/PulpTests
    [HttpGet()]
    [HttpGet(".{format?}")]
    //[HttpGet(".{format?}"),FormatFilter]
    public async Task<ActionResult<IEnumerable<PulpTests>>> GetPulpTests()
    {
        return await _context.PulpTests.Include(b=>b.System).ToListAsync();
    }

Answer 1

好吧 - 如果有人遇到我同样的问题，我对 api 进行了更改以重新定义路线并接受格式：

[Route("api/[controller]")]
[ApiController]    
[FormatFilter]
public class PulpTestsController : ControllerBase
{
    private readonly DatabaseContext _context;

    public PulpTestsController(DatabaseContext context)
    {
        _context = context;
    }

    // GET: api/PulpTests
    [Route("/api/[controller].{format}")] // <- Right here
    [HttpGet]
    public async Task<ActionResult<IEnumerable<PulpTests>>> GetPulpTests()
    {
        return await _context.PulpTests.Include(b=>b.SystemEntity).ToListAsync();
    }

我还删除了 startup.cs

上的一堆样板

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddControllersWithViews();
        //services.AddControllers().AddXmlSerializerFormatters();
        services.AddControllers().AddNewtonsoftJson();
        services.AddControllers(options =>
        {
            options.RespectBrowserAcceptHeader = true;
            options.ReturnHttpNotAcceptable = true;                
            //options.OutputFormatters.RemoveType<HttpNoContentOutputFormatter>();
            //options.InputFormatters.Add(new XmlSerializerInputFormatter(options));
            //options.OutputFormatters.Add(new XmlSerializerOutputFormatter());
            //options.FormatterMappings.SetMediaTypeMappingForFormat(
            //                             "xml", "application/xml");
        }).AddXmlSerializerFormatters();

.Net Core 3 - api - XML 和 JSON 格式根据 URL 请求输出 (.xml, .json)

.Net Core 3 - api - XML and JSON format outputs upon URL request (.xml, .json)

.net

api

format

asp.net-core-3.0