MvcOptions.InputFormatters不适用于asp.net vnext beta7

Question

我的应用程序在迁移到beta 6/7之后停止工作,在调查之后,我发现我的json反序列化器不再使用(Jil),它被要求写入而不是用于阅读.

现在已经3天了,我正在搜索论坛并阅读aspnet代码,但我还没有找到问题.

我注意到JSON.net在beta 6中无处不在,在beta 7中稍微少一点.

这是我的代码:

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvcCore(options =>
        {
            var jilFormatter = new JilMediaTypeFormatter();
            options.OutputFormatters.Clear();
            options.OutputFormatters.Add(jilFormatter);
            options.InputFormatters.Clear();
            options.InputFormatters.Add(jilFormatter);

            options.FormatterMappings.SetMediaTypeMappingForFormat("json", MediaTypeHeaderValue.Parse("application/json"));

            options.ModelBinders.Add(new DocumentModelBinder());
            options.ModelBinders.Add(new DataTablesBinder());
        });
        services.AddDataProtection();
        services.AddWebEncoders();

    }

即使我只是在没有添加对象的情况下执行InputFormatters.Clear(),它也会对请求进行反序列化,我不知道它是如何做到的.

我的JIL InputFormatter/OutputFormatter(ouputformatter工作,我可以在CanWrite中断,但CanRead没有任何反应)

internal class JilMediaTypeFormatter : IOutputFormatter, IInputFormatter
{
    private static readonly string [] _readableTypes = new[] { "application/json", "text/json", "text/javascript" };
    private static readonly Task<bool> _done = Task.FromResult(true);

    private readonly Options _options = Options.RFC1123ExcludeNullsIncludeInherited;


    public bool CanWriteResult(OutputFormatterContext context, Microsoft.Net.Http.Headers.MediaTypeHeaderValue contentType)
    {
        return contentType ==null || _readableTypes.Contains(contentType.MediaType.ToLowerInvariant());
    }

    public Task WriteAsync(OutputFormatterContext context)
    {
        context.HttpContext.Response.ContentType = "application/json";
        using (var writer = new StreamWriter(context.HttpContext.Response.Body))
        {
            JSON.Serialize(context.Object, writer, _options);
            writer.Flush();
            return _done;
        }
    }

    public bool CanRead(InputFormatterContext context)
    {
        return _readableTypes.Contains(context.HttpContext.Request.ContentType);
    }

    public Task<object> ReadAsync(InputFormatterContext context)
    {
        var reader = new StreamReader(context.HttpContext.Request.Body);
        var result = JSON.Deserialize(reader, context.ModelType, _options);
        return Task.FromResult(result);
    }
}

Answer 1

如果有人遇到相同的问题,只有在参数的操作列表中使用[FromBody]时才使用InputFormatters.