Curl 无法接收POST请求Asp.net core 2.2

无法接收3ds party POST请求。415不支持的媒体类型或空模型

在后端：Asp.net core 2.2和AspNetBilerPlate（如果重要的话）

来自第三方服务器的请求，因此我无法影响它。我只能指定将请求发送到的端点

看起来是这样的： 旋度-d'{a:a，b:1}'

我的代码 Dto：

控制器：

[Route("api/[controller]/[action]")]
public class MyController : MyControllerBase
{
   ...
   [HttpPost]
   public async Task<testDto> MyAction(testDto dto)
   {
     //some code
     _logger.Info("test");            
   }
   ...
}

模型为空，未发生绑定

我被添加到这样的动作中：

   [HttpPost]
   public async Task<testDto> MyAction([FromBody]testDto dto)
   {
     //some code
     _logger.Info("test");            
   }

结果：HTTP状态代码415

另外，尝试添加[FromForm]和[FromQyesry]。结果：空模型

有什么问题？我如何让它工作？

---

提前谢谢。

首先是请求http://MyServer/api/MyController/MyAction -d'{a:a，b:1}'不正确，您可以看到协议使用：

curl http://MyServer/api/MyController/MyAction -d '{"a":"a", "b":1}' --trace-ascii debugdump.txt

如果检查转储文件，您会发现数据未完全发送：

0000: POST /api/values/MyAction HTTP/1.1
0024: Host: localhost:44348
003b: User-Agent: curl/7.55.1
0054: Accept: */*
0061: Content-Length: 6
0074: Content-Type: application/x-www-form-urlencoded
00a5: 
=> Send data, 6 bytes (0x6)
0000: '{a:a,
== Info: upload completely sent off: 6 out of 6 bytes
== Info: schannel: client wants to read 102400 bytes
== Info: schannel: encdata_buffer resized 103424
== Info: schannel: encrypted data buffer: offset 0 length 103424
== Info: schannel: encrypted data got 322
== Info: schannel: encrypted data buffer: offset 322 length 103424

您应该与3ds方联系以确认请求

无论如何，如果默认模型绑定不符合您的要求，您可以创建：

添加中间件以启用请求回放：

创建实现IModelBinder的自定义活页夹：

使用活页夹：

[ModelBinder(BinderType = typeof(testDtoEntityBinder))]
public class testDto
{
    public string A { get; set; }
    public int B { get; set; }
}

---

curl-d发布内容类型application/x-www-form-urlencoded，而不是application/json。第三方是否发送了此类请求，或者您的curl设置有误？第三方发送给我的curl格式与此完全相同。我只能以某种方式适应=在这种情况下，内容类型和数据不匹配；请查看答案，在my case中不幸无效=字符串参数仍然为null[HttpPost][Consumesapplication/x-www-form-urlencoded]公共异步任务MyAction[FromForm]字符串数据{var dto=JsonConvert.DeserializeObjectdata；return dto；}也已尝试[FromBody]-错误415

0000: POST /api/values/MyAction HTTP/1.1
0024: Host: localhost:44348
003b: User-Agent: curl/7.55.1
0054: Accept: */*
0061: Content-Length: 6
0074: Content-Type: application/x-www-form-urlencoded
00a5: 
=> Send data, 6 bytes (0x6)
0000: '{a:a,
== Info: upload completely sent off: 6 out of 6 bytes
== Info: schannel: client wants to read 102400 bytes
== Info: schannel: encdata_buffer resized 103424
== Info: schannel: encrypted data buffer: offset 0 length 103424
== Info: schannel: encrypted data got 322
== Info: schannel: encrypted data buffer: offset 322 length 103424

app.Use(async (ctx, next) =>
{
    ctx.Request.EnableRewind();
    await next();
});

public class testDtoEntityBinder : IModelBinder
{
    public Task BindModelAsync(ModelBindingContext bindingContext)
    {
        if (bindingContext == null)
        {
            throw new ArgumentNullException(nameof(bindingContext));
        }


        var body = bindingContext.HttpContext.Request.Body;
        body.Position = 0;


        string raw = new System.IO.StreamReader(body).ReadToEnd();

        //now read content from request content and fill your model 
        var result = new testDto
        {
            A = "",
            B = 1,
        };


        bindingContext.Result = ModelBindingResult.Success(result);
        return Task.CompletedTask;
    }
}

[ModelBinder(BinderType = typeof(testDtoEntityBinder))]
public class testDto
{
    public string A { get; set; }
    public int B { get; set; }
}