使用Asp MVC 4.0 FileResult的Internet Explorer错误

Question

我有以下代码,部署在https Asp站点上,使用MVC 4.0构建:

public FileResult ANotSoWorkingFunction(string filePath, string fileName)
{
 pathToFile = string.Format("~/{0}/{1}", pathToFile, fileName);
 return File(new FileStream(pathToFile, FileMode.Open), "application/pdf", fileName);
}

这对于Chrome,Firefox和IE9来说都是可行的(正如你们许多人可能已经猜到的那样).但它会抛出一个:

---------------------------
Windows Internet Explorer
---------------------------
Internet Explorer cannot download someFileName from a_site.com.


Internet Explorer was not able to open this Internet site.  The requested site is either unavailable or cannot be found.  Please try again later.
---------------------------
OK   
---------------------------

在IE6,7,8上

非常感谢任何关于这个的想法或线索,因为我已经花了很多时间玩html标题.

编辑:

以下是IE7的标题:

HTTP/1.1 200 OK
Cache-Control: private, no-cache="Set-Cookie"
Content-Type: application/pdf
Server: Microsoft-IIS/7.5
X-AspNetMvc-Version: 4.0
X-AspNet-Version: 4.0.30319
Set-Cookie: .ASPXAUTH=; expires=Mon, 11-Oct-1999 21:00:00 GMT; path=/; HttpOnly
X-Powered-By: ASP.NET
Date: Wed, 04 Apr 2012 08:43:50 GMT
Content-Length: 233324

这是来自IE9的那些:

HTTP/1.1 200 OK
Cache-Control: private, no-cache="Set-Cookie"
Content-Type: application/pdf
Server: Microsoft-IIS/7.5
X-AspNetMvc-Version: 4.0
X-AspNet-Version: 4.0.30319
Set-Cookie: .ASPXAUTH=; expires=Mon, 11-Oct-1999 21:00:00 GMT; path=/; HttpOnly
X-Powered-By: ASP.NET
Date: Wed, 04 Apr 2012 08:42:14 GMT
Content-Length: 233324

谢谢,

Answer 1

我想我也遇到了你的问题.

我还运行IIS 7.5并通过HTTPS请求上的操作下载PDF.由于我尚未隔离的原因,IIS 7.5似乎附加no-cache="Set-Cookie"到我的Cache-Control响应头,无论我在响应上设置缓存设置.这导致了no-cacheIE6,IE7和IE8上相当完整的文档问题.

为了解决这个问题,我在FileContentResult周围做了一个小包装,清除了标题,称为父标题,然后将Cacheability设置为'Private'.这方面踩了IIS 7.5坚持添加no-cache="Set-Cookie"到标题,并在我测试的所有浏览器中正确下载文件.如果你想模仿我所做的,首先,这是我的FileContentResult包装器.

public class PdfContentResult : FileContentResult {

    public PdfContentResult(byte[] data) : base(data, "application/pdf") { }

    public PdfContentResult(byte[] data, string fileName) : this(data) {
        if (fileName == null) {
            throw new ArgumentNullException("fileName");
        }

        this.FileDownloadName = fileName;
    }

    public override void ExecuteResult(ControllerContext context) {
        context.HttpContext.Response.ClearHeaders();

        base.ExecuteResult(context);

        context.HttpContext.Response.Cache.SetCacheability(HttpCacheability.Private);
    }
}

然后我为我添加了一个扩展方法,ControllerExtensions以便找到它很简单:

public static class ControllerExtensions {

    public static PdfContentResult Pdf(this Controller controller, byte[] fileContents, string fileName) {
        return new PdfContentResult(fileContents, fileName);
    }

}

最后,在Action中,我做了相同的事情:

public ActionResult MyGeneratedPdf() {
    byte[] myPdfContentInByteStream = GetPdfFromModel();
    return this.Pdf(myPdfContentInByteStream, "MyFile.pdf");
}

显然,如果您正在下载各种数据类型,您可能不希望将解决方法与PDF紧密绑定.