"The format of the URI could not be determined" 在 C# 中组合绝对和相对 URL 时

Question

我有一个脚本可以访问 FTP 服务器，并获取目录下的文件列表：

//line 65 of Status script that is mentioned in error message
string[] list = ftp.DirectoryListSimple("AdvancedCalender/Calenders/Versions");

//ftp.DirectoryListSimple()
//FTP script that is mentioned in error message
public string[] DirectoryListSimple(string directory)
{
    try
    {
        Uri serverUri = new Uri(host);
        Uri relativeUri = new Uri("/" + directory);
        Uri fullUri = new Uri(serverUri, relativeUri);
        ftpRequest = (FtpWebRequest)FtpWebRequest.Create(fullUri);

        ftpRequest.Credentials = new NetworkCredential(user, pass);

        ftpRequest.UseBinary = true;
        ftpRequest.UsePassive = true;
        ftpRequest.KeepAlive = true;

        ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory;

        ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();

        ftpStream = ftpResponse.GetResponseStream();

        StreamReader ftpReader = new StreamReader(ftpStream);

        string directoryRaw = null;

        try { while (ftpReader.Peek() != -1) { directoryRaw += ftpReader.ReadLine() + "|"; } }
        catch (Exception ex) { Debug.LogError(ex.ToString()); }

        ftpReader.Close();
        ftpStream.Close();
        ftpResponse.Close();
        ftpRequest = null;

        try { string[] directoryList = directoryRaw.Split("|".ToCharArray()); return directoryList; }
        catch (Exception ex) { Debug.LogError(ex.ToString()); }
    }
    catch (Exception ex) { Debug.LogError(ex.ToString()); }
    //^ error caught here
    return new string[] { "" };
}

错误信息：

System.UriFormatException: Invalid URI: The format of the URI could not be determined. at System.Uri.CreateThis (System.String uri, System.Boolean dontEscape, System.UriKind uriKind) [0x0007b] in :0 at System.Uri..ctor (System.String uriString) [0x00014] in :0 at BtStudios.HelperClasses.FtpHelpers.FTP.DirectoryListSimple (System.String directory) [0x0000b] in C:\Users\btowr\OneDrive\Desktop\Advanced Calender\Assets\FTP.cs:299 UnityEngine.Debug:LogError (object) BtStudios.HelperClasses.FtpHelpers.FTP:DirectoryListSimple (string) (at Assets/FTP.cs:330) Status:Start () (at Assets/Status.cs:65)

我可以确认我可以连接到 FTP 服务器，我可以确认文件存在，我可以确认 URI 格式是正确的（至少我知道）。

(EDIT) 如果你需要查看函数中使用的变量，我可以分享，但敏感信息，如 ip、用户名和密码将与真实 ip 用户名和密码不同密码。

Answer 1

"/AdvancedCalender/Calenders/Versions"是一个相对 URI，所以你需要这样标记：

Uri relativeUri = new Uri("/" + directory, UriKind.Relative);

"The format of the URI could not be determined" 在 C# 中组合绝对和相对 URL 时

"The format of the URI could not be determined" when combining absolute and relative URLs in C#

c#

unity3d

ftp

uri