C#FTP上传到Linux

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我正在尝试检查FTP服务器上是否存在目录.在您说“使用ListDirectory”或“使用PrintWorkingDirectory”之前,它们并不总是有效.例如,我测试了ftp://webserver/logs是否存在,并且都告诉我它确实不存在.因此,我放弃了将文件上传到目录的路线,如果成功,则该目录存在.

问题是,以下方法不适用于GoDaddy基于CentOS的服务器运行vsFTPd 2.0.7.2.可以在IIS7.5上与Microsoft FTP服务器正常工作.

因此,我使用Wireshark监控了流量,并使用Filezilla来查看我的App并未使其正常运行.唯一的区别是Filezilla更改了工作目录,而我正尝试在其中上载文件的路径之前上传该文件.

我感觉这与其上载到服务器的路径以及Linux的解释有关,因为它的名称可能有点可笑… :-D有热情欢迎的想法吗？

应用程式码

private bool DirectoryExists(string d)
{
    bool exists = true;
    try
    {
        string file = "directoryexists.test";
        string path = url + homepath + d + "/" + file;

        //Try to save to the directory
        req = (FtpWebRequest)WebRequest.Create(path);
        req.ConnectionGroupName = "conngroup1";
        req.Method = WebRequestMethods.Ftp.UploadFile;
        if (nc != null) req.Credentials = nc;
        if (cbSSL.Checked) req.EnableSsl = true;
        req.Timeout = 10000;

        byte[] fileContents = System.Text.Encoding.Unicode.GetBytes("SAFE TO DELETE");
        req.ContentLength = fileContents.Length;

        Stream s = req.GetRequestStream();
        s.Write(fileContents, 0, fileContents.Length);
        s.Close();

        //Delete file if successful
        req = (FtpWebRequest)WebRequest.Create(path);
        req.ConnectionGroupName = "conngroup1";
        req.Method = WebRequestMethods.Ftp.DeleteFile;
        if (nc != null) req.Credentials = nc;
        if (cbSSL.Checked) req.EnableSsl = true;
        req.Timeout = 10000;

        res = (FtpWebResponse)req.GetResponse();
        res.Close();
    }
    catch (WebException ex)
    {
        exists = false;
    }
    return exists;
}

通过Wireshark的Filezilla日志

Response: 230 Login successful.
Request: CWD /Home/test1
Response: 250 Directory successfully changed.
Request: TYPE I
Response: 200 Switching to Binary mode.
Request: PASV
Response: 227 Entering Passive Mode (216,69,186,142,71,209)
Request: LIST
Response: 150 Here comes the directory listing.
FTP Data: 78 bytes
Response: 226 Directory send OK.
Request: PASV
Response: 227 Entering Passive Mode (216,69,186,142,177,1)
Request: STOR directoryexists.txt
Response: 150 Ok to send data.
Response: 226 File receive OK.

通过Wireshark的应用程序日志

Response: 230 Login successful.
Request: OPTS utf8 on
Response: 501 Option not understood.
Request: PWD
Response: 257 "/Home/"
Request: PWD
Response: 257 "/Home/"
Request: TYPE I
Response: 200 Switching to Binary mode.
Request: PASV
Response: 227 Entering Passive Mode (216,69,186,142,217,87)
Request: STOR test1/directoryexists.txt
Response: 553 Could not create file.

如果文件夹不存在,它将创建文件夹.

Response: 230 Login successful.
Request: PWD
Response: 257 "/Home/"
Request: PWD
Response: 257 "/Home/"
Request: TYPE I
Response: 200 Switching to Binary mode.
Request: PASV
Response: 227 Entering Passive Mode (216,69,186,142,220,60)
Request: STOR Logs/directoryexists.txt
Response: 553 Could not create file.
Request: PWD
Response: 257 "/Home/"
Request: MKD Logs
Response: 257 Create folder operation successful.
Request: TYPE I
Response: 200 Switching to Binary mode.
Request: PASV
Response: 227 Entering Passive Mode (216,69,186,142,255,245)
Request: STOR Logs/LogFiles/directoryexists.txt
Response: 553 Could not create file.
Request: PWD
Response: 257 "/Home/"
Request: MKD Logs/LogFiles
Response: 257 Create folder operation successful.

解决方法:

Linux再次咬人…

解决方案是在路径名中设置一个双斜杠,以便在STOR时使用一个斜杠…就像这样：

string url = "ftp://website/";
string homepath = "/Home/";
string d = "test1";
string file = "directoryexists.test";

string path = url + homepath + d + "/" + file;

因此完整路径应类似于ftp：//website//Home/test1/directoryexists.test

req = (FtpWebRequest)WebRequest.Create("ftp://website//Home/test1/directoryexists.test"); 

这样,STOR命令将看起来像

STOR /Home/test1/directoryexists.test

您可以从StatusDescription获取主路径

req = (FtpWebRequest)WebRequest.Create(url);
req.Method = WebRequestMethods.Ftp.PrintWorkingDirectory;
if (nc != null) req.Credentials = nc;
if (cbSSL.Checked) req.EnableSsl = true;
req.Timeout = 10000;
res = (FtpWebResponse)req.GetResponse();

System.Text.RegularExpressions.Regex regexp = new System.Text.RegularExpressions.Regex("\\s\"([^\"]*)\"\\s");
homepath = regexp.Match(res.StatusDescription).Groups[1].Value;

res.Close();

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