我有一个Web应用程序,可以在点击事件中流式传输PDF文件,它在IE,Firefox和Safari中运行良好,但在Chrome中它永远不会下载.下载只读“中断”. Chrome处理流媒体有何不同？我的代码看起来像：
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,Size);
while (numBytes > 0)
{
output.Write(bytes,numBytes);
numBytes = input.Read(bytes,Size);
}
reportStream.Close();
reportStream.Dispose();
this.Page.Response.Flush();
this.Page.Response.Close();
关于我可能缺少什么的任何建议？
解决方法
最新的Google Chrome v12版本
introduced a bug会触发您描述的问题.
您可以通过发送Content-Length标头来修复它,如下面的代码修改版本所示：
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,Size);
totalBytes += numBytes;
while (numBytes > 0)
{
output.Write(bytes,numBytes);
numBytes = input.Read(bytes,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();
