自定义内容输出

在接口通讯时往往需要响应不同格式的内容，组件虽然默认集成了JSON格式输出；但实际情况不同情况输出的格式都可能存在差异，这个时候针对API提供不同格式输出就非常重要.组件支持使用者自定API输出的数据格式，只需要实现IResult接口即可。

IResult

    public interface IResult
    {
        IHeaderItem ContentType { get; }

        int Length { get; set; }

        void Setting(HttpResponse response);

        bool HasBody { get; }

        void Write(PipeStream stream, HttpResponse response);
    }

基础响应类

    public abstract class ResultBase : IResult
    {
        public virtual IHeaderItem ContentType => ContentTypes.TEXT_UTF8;

        public virtual int Length { get; set; }

        public virtual bool HasBody => true;

        public virtual void Setting(HttpResponse response)
        {

        }

        public virtual void Write(PipeStream stream, HttpResponse response)
        {

        }

    }

404的实现

    public class NotFoundResult : ResultBase
    {
        public NotFoundResult(string message)
        {
            Message = message;
        }

        public NotFoundResult(string formater, params object[] data) : this(string.Format(formater, data)) { }

        public string Message { get; set; }


        public override bool HasBody => true;

        public override void Setting(HttpResponse response)
        {
            response.Request.Server.RequestError();
            response.Code = "404";
            response.CodeMsg = "not found";
            response.Request.ClearStream();
        }

        public override void Write(PipeStream stream, HttpResponse response)
        {
            stream.Write(Message);
        }
    }

默认Json实现

    public class JsonResult : ResultBase
    {
        public JsonResult(object data)
        {
            Data = data;
        }

        public object Data { get; set; }

        public override IHeaderItem ContentType => ContentTypes.JSON;

        public override bool HasBody => true;

        public override void Write(PipeStream stream, HttpResponse response)
        {
            using (stream.LockFree())
            {
                response.JsonSerializer.Serialize(response.JsonWriter, Data);
                response.JsonWriter.Flush();
            }
        }
    }

在方法中使用

        public object json(IHttpContext context)
        {
            return new JsonResult(new JsonMessage { message = "Hello, World!" });
        }

下载内容Result

        public class DownLoad : BeetleX.FastHttpApi.IResult
        {
            public DownLoad(string text)
            {
                Text = text;
            }
            public string Text { get; set; }
            public IHeaderItem ContentType => ContentTypes.OCTET_STREAM;
            public int Length { get; set; }
            public bool HasBody => true;
            public void Setting(HttpResponse response)
            {
                response.Header.Add("Content-Disposition", "attachment;filename=TcpBanchmarks.json");
            }
            public void Write(PipeStream stream, HttpResponse response)
            {
                stream.Write(Text);
            }
        }
    }

在方法中使用

        public object Download()
        {
            var items = Service.Default.GetStore();
            string text = Newtonsoft.Json.JsonConvert.SerializeObject(items);
            return new DownLoad(text);
        }