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通过文件流输出的下载功能遇到的诡异问题

通过文件流输出下载附件,内网下载没有问题,但外网访问下载时,前几次没有问题,多点几次就出现:502 Bad Gateway The server returned an invalid or incomplete response

之前我以为是下载大文件时,输出来不及响应造成的,但我改了代码,大文件分段输出了,每段只有10字节,但还是有问题。好奇怪啊!

 iStream = new MemoryStream(d.Content);

                    long dataToRead = iStream.Length;

                    // Read the bytes.
                    while (dataToRead > 0)
                    {
                        // Verify that the client is connected.
                        if (Response.IsClientConnected)
                        {
                            // Read the data in buffer.
                            int length = iStream.Read(buffer, 0, 100);

                            // Write the data to the current output stream.
                            Response.OutputStream.Write(buffer, 0, length);

                            // Flush the data to the HTML output.
                            Response.Flush();

                            buffer = new Byte[100];
                            dataToRead = dataToRead - length;
                        }
                        else
                        {
                            //prevent infinite loop if user disconnects
                            dataToRead = -1;
                        }
                    }
asp.net asp .net c# --------------------编程问答-------------------- 问题解决了,居然是   Response.AddHeader("Content-Length ", contents.Length.ToString());
中 "Content-Length " 多了空格,但是为什么内网就没问题 外网有问题呢???? --------------------编程问答--------------------
引用 1 楼 kingstaron 的回复:
问题解决了,居然是   Response.AddHeader("Content-Length ", contents.Length.ToString());
中 "Content-Length " 多了空格,但是为什么内网就没问题 外网有问题呢????

支持 学习。 --------------------编程问答-------------------- 除
补充:.NET技术 ,  ASP.NET
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