Question

我有代码，我将xml文件发送到ftp服务器，但ftp服务器上的文件大小小于原始文件。我正在尝试启用二进制传输，但结果仍然相同。

FileInfo f = new FileInfo("C:\\Users\\L\\Desktop\\data.xml");
            long original_vel = f.Length; 
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://***");
            request.UseBinary = true;
            request.Method = WebRequestMethods.Ftp.GetFileSize;
            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential("*****", "*****");

            StreamReader sourceStream = new StreamReader(@"C:\\Users\\L\\Desktop\\data.xml");
            byte[] fileContents = Encoding.Unicode.GetBytes(sourceStream.ReadToEnd());
            sourceStream.Close();
            request.ContentLength = fileContents.Length;
            long ftp_vel = request.ContentLength;      
            Stream requestStream = request.GetRequestStream();
            requestStream.Write(fileContents, 0, fileContents.Length);
            requestStream.Close();
            FtpWebResponse response = (FtpWebResponse)request.GetResponse();
            if (original_vel == ftp_vel)
            {
                response.Close();   
            }
            else
            {                
                Odesilani();
            }

原始文件的大小是294 672，但ftp上的文件有294 670。 The xml file on ftp is valid....But when i compare files in total comander, the original file have: FF FE 3C 00 3F 00.....and the file on ftp have 3C 00 3F 00...但是文件内容还可以......：/ 你知道吗？

Answer 1

服务器上的XML文件是否有效？从您的代码中，您正在使用Unicode读取文件。使用unicode编码的文件通常具有一个放在文件开头的字符Byte Order Mark。这可能是因为在转换过程中丢失了2字节差异的原因。

更新任何编码的正确字节顺序标记由Encoding.GetPreamble()给出上面代码的修复将是..



        StreamReader sourceStream = new StreamReader(@"C:\\Users\\L\\Desktop\\data.xml");

        //Get Preamble and File Contents
        byte[] bom = Encoding.Unicode.GetPreamble();
        byte[] content = Encoding.Unicode.GetBytes(sourceStream.ReadToEnd());

        //Create Destination array
        byte[] fileContents = new Byte[bom.Length + content.Length];

        //Copy arrays into destination appending bom if available
        Array.Copy(bom, 0, fileContents, 0, bom.Length);
        Array.Copy(content, 0, fileContents, bom.Length, content.Length);


        request.ContentLength = fileContents.Length;
        long ftp_vel = request.ContentLength;
        Stream requestStream = request.GetRequestStream();
        requestStream.Write(fileContents, 0, fileContents.Length);
        requestStream.Close();
        FtpWebResponse response = (FtpWebResponse)request.GetResponse();
        if (original_vel == ftp_vel)
        {
            response.Close();
        }
        else
        {
            Odesilani();
        }

StreamReader sourceStream = new StreamReader(@"C:\\Users\\L\\Desktop\\data.xml"); //Get Preamble and File Contents byte[] bom = Encoding.Unicode.GetPreamble(); byte[] content = Encoding.Unicode.GetBytes(sourceStream.ReadToEnd()); //Create Destination array byte[] fileContents = new Byte[bom.Length + content.Length]; //Copy arrays into destination appending bom if available Array.Copy(bom, 0, fileContents, 0, bom.Length); Array.Copy(content, 0, fileContents, bom.Length, content.Length); request.ContentLength = fileContents.Length; long ftp_vel = request.ContentLength; Stream requestStream = request.GetRequestStream(); requestStream.Write(fileContents, 0, fileContents.Length); requestStream.Close(); FtpWebResponse response = (FtpWebResponse)request.GetResponse(); if (original_vel == ftp_vel) { response.Close(); } else { Odesilani(); }

在ftp二进制文件上上传xml文件

1 个答案: