使用[FromBody]时获取原始POST数据

Question

我有一个在ASP.NET Core 1.0 RC2上运行的控制器,我想将原始POST数据转储到遥测中,因为ApplicationInsights不会为您执行此操作.我的代码看起来像这样

[HttpPost]
[Produces("application/json")]
public IActionResult Post([FromBody] RequestClass RequestData)
{
    var stream = this.HttpContext.Request.Body;
    stream.Position = 0;
    using (var reader = new StreamReader(stream))
    {
        string body = reader.ReadToEnd();
        Telemetry.TrackTrace(body, Microsoft.ApplicationInsights.DataContracts.SeverityLevel.Information);
    }
    return Ok();
}

但字符串"body"总是空着.如果我从函数签名中删除[FromBody]装饰,那么此代码可以工作,但RequestData对象只包含null,这不是我想要的.

我唯一能想到的就是将RequestData转换回Json字符串,但这感觉很笨拙而且很慢.

(编辑:POST数据是Json)

Answer 1

您需要启用缓冲请求正文:https: services.Configure<FormOptions>(options => options.BufferBody = true); //github.com/aspnet/HttpAbstractions/blob/dev/src/Microsoft.AspNetCore.Http/Features/FormOptions.cs#L20