FtpMethodInfo.cs

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namespace System.Net;
 
internal sealed class FtpMethodInfo
{
    internal string Method;
 
    internal FtpOperation Operation;
 
    internal FtpMethodFlags Flags;
 
    internal string HttpCommand;
 
    private static readonly FtpMethodInfo[] s_knownMethodInfo = new FtpMethodInfo[13]
    {
        new FtpMethodInfo("RETR", FtpOperation.DownloadFile, FtpMethodFlags.IsDownload | FtpMethodFlags.TakesParameter | FtpMethodFlags.HasHttpCommand, "GET"),
        new FtpMethodInfo("NLST", FtpOperation.ListDirectory, FtpMethodFlags.IsDownload | FtpMethodFlags.MayTakeParameter | FtpMethodFlags.HasHttpCommand | FtpMethodFlags.MustChangeWorkingDirectoryToPath, "GET"),
        new FtpMethodInfo("LIST", FtpOperation.ListDirectoryDetails, FtpMethodFlags.IsDownload | FtpMethodFlags.MayTakeParameter | FtpMethodFlags.HasHttpCommand | FtpMethodFlags.MustChangeWorkingDirectoryToPath, "GET"),
        new FtpMethodInfo("STOR", FtpOperation.UploadFile, FtpMethodFlags.IsUpload | FtpMethodFlags.TakesParameter, null),
        new FtpMethodInfo("STOU", FtpOperation.UploadFileUnique, FtpMethodFlags.IsUpload | FtpMethodFlags.DoesNotTakeParameter | FtpMethodFlags.ShouldParseForResponseUri | FtpMethodFlags.MustChangeWorkingDirectoryToPath, null),
        new FtpMethodInfo("APPE", FtpOperation.AppendFile, FtpMethodFlags.IsUpload | FtpMethodFlags.TakesParameter, null),
        new FtpMethodInfo("DELE", FtpOperation.DeleteFile, FtpMethodFlags.TakesParameter, null),
        new FtpMethodInfo("MDTM", FtpOperation.GetDateTimestamp, FtpMethodFlags.TakesParameter, null),
        new FtpMethodInfo("SIZE", FtpOperation.GetFileSize, FtpMethodFlags.TakesParameter, null),
        new FtpMethodInfo("RENAME", FtpOperation.Rename, FtpMethodFlags.TakesParameter, null),
        new FtpMethodInfo("MKD", FtpOperation.MakeDirectory, FtpMethodFlags.TakesParameter | FtpMethodFlags.ParameterIsDirectory, null),
        new FtpMethodInfo("RMD", FtpOperation.RemoveDirectory, FtpMethodFlags.TakesParameter | FtpMethodFlags.ParameterIsDirectory, null),
        new FtpMethodInfo("PWD", FtpOperation.PrintWorkingDirectory, FtpMethodFlags.DoesNotTakeParameter, null)
    };
 
    internal bool IsCommandOnly => (Flags & (FtpMethodFlags.IsDownload | FtpMethodFlags.IsUpload)) == 0;
 
    internal bool IsUpload => (Flags & FtpMethodFlags.IsUpload) != 0;
 
    internal bool IsDownload => (Flags & FtpMethodFlags.IsDownload) != 0;
 
    internal bool ShouldParseForResponseUri => (Flags & FtpMethodFlags.ShouldParseForResponseUri) != 0;
 
    internal FtpMethodInfo(string method, FtpOperation operation, FtpMethodFlags flags, string httpCommand)
    {
        Method = method;
        Operation = operation;
        Flags = flags;
        HttpCommand = httpCommand;
    }
 
    internal bool HasFlag(FtpMethodFlags flags)
    {
        return (Flags & flags) != 0;
    }
 
    internal static FtpMethodInfo GetMethodInfo(string method)
    {
        method = method.ToUpperInvariant();
        FtpMethodInfo[] array = s_knownMethodInfo;
        foreach (FtpMethodInfo ftpMethodInfo in array)
        {
            if (method == ftpMethodInfo.Method)
            {
                return ftpMethodInfo;
            }
        }
        throw new ArgumentException(System.SR.net_ftp_unsupported_method, "method");
    }
}