从ASP应用程序流的MIME类型“应用程序/ PDF”谷歌浏览器失败 [英] Streaming mime type 'application/pdf' from asp app fails in Google Chrome

问题描述

我有一个click事件流的PDF文件的Web应用程序，它工作正常在IE，Firefox和Safari，但在Chrome它从来没有下载。下载只是写着追访。 Chrome是否处理流不同？我的code如下：

I have a web application that streams a PDF file on a click event, it works fine in IE, Firefox, and Safari but in Chrome it never download. The download just reads "Interrupted". Does Chrome handle streaming differently? My code looks like:

        this.Page.Response.Buffer = true;
        this.Page.Response.ClearHeaders();
        this.Page.Response.ClearContent();
        this.Page.Response.ContentType = "application/pdf";
        this.Page.Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);
        Stream input = reportStream;
        Stream output = this.Page.Response.OutputStream;
        const int Size = 4096;
        byte[] bytes = new byte[4096];
        int numBytes = input.Read(bytes, 0, Size);
        while (numBytes > 0)
        {
            output.Write(bytes, 0, numBytes);
            numBytes = input.Read(bytes, 0, Size);
        }

        reportStream.Close();
        reportStream.Dispose();
        this.Page.Response.Flush();
        this.Page.Response.Close();

任何建议，我可能会错过了什么？

Any suggestions as to what I might be missing?

推荐答案

最近的谷歌浏览器的V12版本的出台触发您所描述问题的错误。

A recent Google Chrome v12 release introduced a bug that triggers the problem you describe.

您可以通过发送内容长度头，在你的code以下修改后的版本修复它

You can fix it by sending the Content-Length header, as in the following modified version of your code:

this.Page.Response.Buffer = true;
this.Page.Response.ClearHeaders();
this.Page.Response.ClearContent();
this.Page.Response.ContentType = "application/pdf";
this.Page.Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);
Stream input = reportStream;
Stream output = this.Page.Response.OutputStream;
const int Size = 4096;
byte[] bytes = new byte[4096];
int totalBytes = 0;
int numBytes = input.Read(bytes, 0, Size);
totalBytes += numBytes;
while (numBytes > 0)
{
    output.Write(bytes, 0, numBytes);
    numBytes = input.Read(bytes, 0, Size);
    totalBytes += numBytes;
}

// You can set this header here thanks to the Response.Buffer = true above
// This header fixes the Google Chrome bug
this.Page.Response.AddHeader("Content-Length", totalBytes.ToString());

reportStream.Close();
reportStream.Dispose();
this.Page.Response.Flush();
this.Page.Response.Close();

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