Question

我正在开发一个小项目，该项目使用在WPF应用程序中托管的Nancy。我希望能够远程下载大约8MB的PDF文件。我能够让下载工作，但在下载过程中，应用程序将不会响应任何其他请求。有没有办法允许文件下载而不会占用所有其他请求？

Public Class ManualsModule : Inherits NancyModule
    Public Sub New()
        MyBase.New("/Manuals")

        Me.Get("/") = Function(p)
            Dim model As New List(Of String) From {"electrical", "opmaint", "parts"}
            Return View("Manuals", model)
        End Function

        Me.Get("/{name}") = Function(p)
            Dim manualName = p.name
            Dim fileResponse As New GenericFileResponse(String.Format("Content\Manuals\{0}.pdf", manualName))
            Return fileResponse
        End Function
    End Sub
End Class

或者在C＃中

public class ManualsModule : NancyModule
{
    public ManualsModule() : base("/Manuals")
    {
        this.Get("/") = p =>
        {
            List<string> model = new List<string> {
                "electrical",
                "opmaint",
                "parts"
            };

            return View("Manuals", model);
        };

        this.Get("/{name}") = p =>
        {
            dynamic manualName = p.name;
            GenericFileResponse fileResponse = new GenericFileResponse(string.Format("Content\\Manuals\\{0}.pdf", manualName));
            return fileResponse;
        };
    }
}

Answer 1

var file = new FileStream(zipPath, FileMode.Open);
string fileName = //set a filename

var response = new StreamResponse(() => file, MimeTypes.GetMimeType(fileName));
return response.AsAttachment(fileName);

Answer 2

最简单的方法是围绕它创建一个StreamWriter，如下所示：

var response = new Response();

response.Headers.Add("Content-Disposition", "attachment; filename=test.txt");
response.ContentType = "text/plain";
response.Contents = stream => {
    using (var writer = new StreamWriter(stream))
    {
        writer.Write("Hello");
    }
};

return response;

Answer 3

我发现我实际上是在WCF中托管Nancy而不是自托管主机。我描述的行为仅在WCF中托管时发生。自我主机将适用于我的应用程序，所以我会继续。

Answer 4

如果您希望将文件作为附件，Monivs的答案很有用，如果您想直接在浏览器中打开pdf，可以这样做：

MemoryStream ms = new MemoryStream(documentBody);
var response = new Response();
response.ContentType = "application/pdf";
response.Contents = stream => {
    ms.WriteTo(stream);
};
return response;

在自托管Nancy应用程序中下载文件

4 个答案: