c# - 远程服务器返回错误 : (550) on upload file to FTP using FtpWebRequest

Question

我需要通过 ftp 上传文件到主机。在主机根目录下创建的/home2/travele2路径

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，出现以下错误:

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

问题是什么？

// 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();

Answer 1

URL 必须包含目标文件名:

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

FtpWebRequest 还怎么知道要使用什么名称？

---

一旦您解决了这个问题，您会发现上传会损坏文件，因为您将文件视为 UTF-8 编码的文本。废话，因为PDF是二进制文件。

有关正确的代码，请参阅:
Upload and download a file to/from FTP server in C#/.NET