如何在JSON响应中正确返回PDF？

Question

我需要在我的WebApi 2 响应中返回两个PDF文件，实际上我是通过将pdf文件作为Base64 string发送来完成此操作的，但我的问题是如果方法正确或有更好的方法可以这样做] ..

这是我的构造函数，我的Api返回：

public class DCW
{
    public string numdoc { get; set; }
    public string pdf { get; set; }
    public string pdf_regalo { get; set; }

    public string Base64(string path)
    {
        // Method to convert pdf to Base64
        byte[] bytes = File.ReadAllBytes(path);
        string file = Convert.ToBase64String(bytes);

        return file;
    }
}
这是我的controller的样子：

  [Route("api/[controller]")]
    public class DriverController : Controller
    {
        [HttpPost]
        public DCW Post([FromBody]Scontrino scontrino)
        {

            DCW dcw = new DCW();
            string pdf = dcw.Base64("C:/users/imytyuk/Desktop/TEST/XXX01_731378.pdf");
            string pdf_regalo = dcw.Base64("C:/users/imytyuk/Desktop/TEST/XXX01_731378_regalo.pdf");

            dcw.numdoc = "5454835";
            dcw.pdf = pdf;
            dcw.pdf_regalo = pdf_regalo;

            return dcw;


        }

    }
实际上是以下答复：

{
    "numdoc": "5454835",
    "pdf": "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",
    "pdf_regalo": "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"
}

我需要在WebApi 2响应中返回两个PDF文件，实际上我是通过简单地将pdf文件作为Base64字符串发送来实现的，但是我的问题是方法是否正确或是否存在...

Answer 1

简短的答案是没有。这是传输文件的合法方法，但是有几个缺点：