远程服务器返回错误:(550)使用FtpWebRequest将文件上传到FTP [英] The remote server returned an error: (550) on upload file to FTP using FtpWebRequest

问题描述

我需要通过ftp上传文件到主机.在主机根目录上创建的/home2/travele2路径

I need to upload file via ftp to host. The /home2/travele2 path created on the root of host

我可以通过FileZilla程序将文件上传到主机，但是当我尝试通过网站上传文件时，出现此错误:

I can upload file via FileZilla program to the host, but when I try to upload file via website, it gets me this error:

远程服务器返回错误:(550)文件不可用(例如，文件未找到，无法访问).

The remote server returned an error: (550) File unavailable (e.g., file not found, no access).

出什么问题了?

// Get the object used to communicate with the server.  
FtpWebRequest ftpWebRequest = (FtpWebRequest)WebRequest.Create("ftp://00.00.00.00/home2/travele2");
ftpWebRequest.Method = WebRequestMethods.Ftp.UploadFile;
// This example assumes the FTP site uses anonymous logon.  
ftpWebRequest.Credentials = new NetworkCredential("aaaaaaa", "0000000");

// Copy the contents of the file to the request stream.  
StreamReader sourceStream = new StreamReader(Server.MapPath("/Content/Site.pdf"));
byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
sourceStream.Close();
ftpWebRequest.ContentLength = fileContents.Length;

Stream requestStream = ftpWebRequest.GetRequestStream();
requestStream.Write(fileContents, 0, fileContents.Length);
requestStream.Close();

FtpWebResponse response = (FtpWebResponse)ftpWebRequest.GetResponse();

Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription);

response.Close();

推荐答案

URL必须包含目标文件名:

The URL has to include a target file name:

FtpWebRequest ftpWebRequest =
    (FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/home2/travele2/Site.pdf");

FtpWebRequest还怎么知道，要使用什么名称?

How else would the FtpWebRequest know, what name to use?

解决该问题后，您会发现上载损坏了该文件，因为您将该文件视为UTF-8编码的文本.什么是废话，因为PDF是二进制文件.

And once you have that solved, you will find out that the upload corrupts the file, as you treat the file as UTF-8-encoded text. What is nonsense, as a PDF is a binary file.

有关正确的代码，请参阅:
在C#/.NET的FTP服务器上向/从FTP服务器上下载二进制文件

For a correct code, see:
Upload and download a binary file to/from FTP server in C#/.NET

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