"Failed to construct 'Blob': The provided value cannot be converted to a sequence" 下载文件时

Question

我正在尝试使用 ajax/jquery 下载并保存 PDF 文件（我知道..）。

这是我在服务器端的内容：

        public HttpResponseMessage GetPdf()
        {
            var pdf = generatePdfByteArray(); // byte[]

            var result = Request.CreateResponse(HttpStatusCode.OK);
            result.Content = new ByteArrayContent(pdf);
            //result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
            //{
            //    FileName = "blah.pdf"
            //};
// tried with and without content disposition.. shouldn't matter, i think?
            result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");

            return result;
        }

这是客户端：

    let ajaxOptions = {
    url: '/url',
    type: "GET",
    accepts: "application/pdf",
    success: (data) => {
        let blob = new Blob(data, {
            type: "application/pdf"
        }); // <-- this fails

        // stuff...
    }
};
$.ajax(ajaxOptions);

知道这有什么问题吗？

Answer 1

第一个参数应该是sequence。

因此，这将不起作用：

let blob = new Blob(data, {
    type: "application/pdf"
});

但这将：

let blob = new Blob([data], {
    type: "application/pdf"
});

Answer 2

这就是我最终得到的结果：

public HttpResponseMessage GetPdf()
{
    var pdf = generatePdfByteArray();

    var result = Request.CreateResponse(HttpStatusCode.OK);
    var dataStream = new MemoryStream(pdf);
    result.Content = new StreamContent(dataStream);
    result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
    {
        FileName = "file.pdf"
    };
    result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");

    return result;
}

"Failed to construct 'Blob': The provided value cannot be converted to a sequence" 下载文件时

"Failed to construct 'Blob': The provided value cannot be converted to a sequence" when downloading file

ajax

jquery

asp.net-web-api2