private static FtpListItem ParseUnixList(string buf, FtpCapability capabilities)
{
Match match;
long num;
string pattern = @"(?<permissions>.+)\s+(?<objectcount>\d+)\s+(?<user>.+)\s+(?<group>.+)\s+(?<size>\d+)\s+(?<modify>\w+\s+\d+\s+\d+:\d+|\w+\s+\d+\s+\d+)\s(?<name>.*)$";
FtpListItem item = new FtpListItem();
if ((match = Regex.Match(buf, pattern, RegexOptions.IgnoreCase)).Success)
{
if (match.Groups["permissions"].Value.Length == 0)
{
return(null);
}
switch (match.Groups["permissions"].Value[0])
{
case 'l':
item.Type = FtpFileSystemObjectType.Link;
goto Label_0099;
case 's':
case '-':
item.Type = FtpFileSystemObjectType.File;
goto Label_0099;
case 'd':
item.Type = FtpFileSystemObjectType.Directory;
goto Label_0099;
}
}
return(null);
Label_0099:
if (match.Groups["name"].Value.Length < 1)
{
return(null);
}
item.Name = match.Groups["name"].Value;
switch (item.Type)
{
case FtpFileSystemObjectType.Directory:
if (!(item.Name == ".") && !(item.Name == ".."))
{
break;
}
return(null);
case FtpFileSystemObjectType.Link:
if (item.Name.Contains(" -> "))
{
item.LinkTarget = item.Name.Remove(0, item.Name.IndexOf("-> ") + 3);
item.Name = item.Name.Remove(item.Name.IndexOf(" -> "));
break;
}
return(null);
}
if ((((capabilities & FtpCapability.MDTM) != FtpCapability.MDTM) || (item.Type == FtpFileSystemObjectType.Directory)) && (match.Groups["modify"].Value.Length > 0))
{
item.Modified = match.Groups["modify"].Value.GetFtpDate(DateTimeStyles.AssumeLocal);
if (item.Modified == DateTime.MinValue)
{
FtpTrace.WriteLine("GetFtpDate() failed on {0}", new object[] { match.Groups["modify"].Value });
}
}
else if (match.Groups["modify"].Value.Length == 0)
{
FtpTrace.WriteLine("RegEx failed to parse modified date from {0}.", new object[] { buf });
}
else if (item.Type == FtpFileSystemObjectType.Directory)
{
FtpTrace.WriteLine("Modified times of directories are ignored in UNIX long listings.");
}
else if ((capabilities & FtpCapability.MDTM) == FtpCapability.MDTM)
{
FtpTrace.WriteLine("Ignoring modified date because MDTM feature is present. If you aren't already, pass FtpListOption.Modify or FtpListOption.SizeModify to GetListing() to retrieve the modification time.");
}
if ((match.Groups["size"].Value.Length > 0) && long.TryParse(match.Groups["size"].Value, out num))
{
item.Size = num;
}
if (match.Groups["permissions"].Value.Length > 0)
{
Match match2 = Regex.Match(match.Groups["permissions"].Value, @"[\w-]{1}(?<owner>[\w-]{3})(?<group>[\w-]{3})(?<others>[\w-]{3})", RegexOptions.IgnoreCase);
if (!match2.Success)
{
return(item);
}
if (match2.Groups["owner"].Value.Length == 3)
{
if (match2.Groups["owner"].Value[0] == 'r')
{
item.OwnerPermissions |= FtpPermission.None | FtpPermission.Read;
}
if (match2.Groups["owner"].Value[1] == 'w')
{
item.OwnerPermissions |= FtpPermission.None | FtpPermission.Write;
}
if ((match2.Groups["owner"].Value[2] == 'x') || (match2.Groups["owner"].Value[2] == 's'))
{
item.OwnerPermissions |= FtpPermission.Execute;
}
if ((match2.Groups["owner"].Value[2] == 's') || (match2.Groups["owner"].Value[2] == 'S'))
{
item.SpecialPermissions |= FtpSpecialPermissions.SetUserID;
}
}
if (match2.Groups["group"].Value.Length == 3)
{
if (match2.Groups["group"].Value[0] == 'r')
{
item.GroupPermissions |= FtpPermission.None | FtpPermission.Read;
}
if (match2.Groups["group"].Value[1] == 'w')
{
item.GroupPermissions |= FtpPermission.None | FtpPermission.Write;
}
if ((match2.Groups["group"].Value[2] == 'x') || (match2.Groups["group"].Value[2] == 's'))
{
item.GroupPermissions |= FtpPermission.Execute;
}
if ((match2.Groups["group"].Value[2] == 's') || (match2.Groups["group"].Value[2] == 'S'))
{
item.SpecialPermissions |= FtpSpecialPermissions.SetGroupID;
}
}
if (match2.Groups["others"].Value.Length == 3)
{
if (match2.Groups["others"].Value[0] == 'r')
{
item.OthersPermissions |= FtpPermission.None | FtpPermission.Read;
}
if (match2.Groups["others"].Value[1] == 'w')
{
item.OthersPermissions |= FtpPermission.None | FtpPermission.Write;
}
if ((match2.Groups["others"].Value[2] == 'x') || (match2.Groups["others"].Value[2] == 't'))
{
item.OthersPermissions |= FtpPermission.Execute;
}
if ((match2.Groups["others"].Value[2] != 't') && (match2.Groups["others"].Value[2] != 'T'))
{
return(item);
}
item.SpecialPermissions |= FtpSpecialPermissions.Sticky;
}
}
return(item);
}
/// <summary>
/// Parses LIST format listings
/// </summary>
/// <param name="buf">A line from the listing</param>
/// <param name="capabilities">Server capabilities</param>
/// <returns>FtpListItem if the item is able to be parsed</returns>
internal static FtpListItem ParseUnixList(string buf, FtpCapability capabilities)
{
string regex =
@"(?<permissions>.+)\s+" +
@"(?<objectcount>\d+)\s+" +
@"(?<user>.+)\s+" +
@"(?<group>.+)\s+" +
@"(?<size>\d+)\s+" +
@"(?<modify>\w+\s+\d+\s+\d+:\d+|\w+\s+\d+\s+\d+)\s" +
@"(?<name>.*)$";
Match m;
if (!(m = Regex.Match(buf, regex, RegexOptions.IgnoreCase)).Success)
{
return(null);
}
// if this field is missing we can't determine
// what the object is.
if (m.Groups["permissions"].Value.Length == 0)
{
return(null);
}
FtpListItem item = new FtpListItem();
switch (m.Groups["permissions"].Value[0])
{
case 'd':
item.Type = FtpFileSystemObjectType.Directory;
break;
case '-':
case 's':
item.Type = FtpFileSystemObjectType.File;
break;
case 'l':
item.Type = FtpFileSystemObjectType.Link;
break;
default:
return(null);
}
// if we can't determine a file name then
// we are not considering this a successful parsing operation.
if (m.Groups["name"].Value.Length < 1)
{
return(null);
}
item.Name = m.Groups["name"].Value;
switch (item.Type)
{
case FtpFileSystemObjectType.Directory:
// ignore these...
if (item.Name == "." || item.Name == "..")
{
return(null);
}
break;
case FtpFileSystemObjectType.Link:
if (!item.Name.Contains(" -> "))
{
return(null);
}
item.LinkTarget = item.Name.Remove(0, item.Name.IndexOf("-> ") + 3);
item.Name = item.Name.Remove(item.Name.IndexOf(" -> "));
break;
}
// for date parser testing only
//capabilities = ~(capabilities & FtpCapability.MDTM);
////
// Ignore the Modify times sent in LIST format for files
// when the server has support for the MDTM command
// because they will never be as accurate as what can be had
// by using the MDTM command. MDTM does not work on directories
// so if a modify time was parsed from the listing we will try
// to convert it to a DateTime object and use it for directories.
////
if (((capabilities & FtpCapability.MDTM) != FtpCapability.MDTM || item.Type == FtpFileSystemObjectType.Directory) && m.Groups["modify"].Value.Length > 0)
{
item.Modified = m.Groups["modify"].Value.GetFtpDate(DateTimeStyles.AssumeLocal);
if (item.Modified == DateTime.MinValue)
{
FtpTrace.WriteLine("GetFtpDate() failed on {0}", m.Groups["modify"].Value);
}
}
else
{
if (m.Groups["modify"].Value.Length == 0)
{
FtpTrace.WriteLine("RegEx failed to parse modified date from {0}.", buf);
}
else if (item.Type == FtpFileSystemObjectType.Directory)
{
FtpTrace.WriteLine("Modified times of directories are ignored in UNIX long listings.");
}
else if ((capabilities & FtpCapability.MDTM) == FtpCapability.MDTM)
{
FtpTrace.WriteLine("Ignoring modified date because MDTM feature is present. If you aren't already, pass FtpListOption.Modify or FtpListOption.SizeModify to GetListing() to retrieve the modification time.");
}
}
if (m.Groups["size"].Value.Length > 0)
{
long size;
if (long.TryParse(m.Groups["size"].Value, out size))
{
item.Size = size;
}
}
if (m.Groups["permissions"].Value.Length > 0)
{
Match perms = Regex.Match(m.Groups["permissions"].Value,
@"[\w-]{1}(?<owner>[\w-]{3})(?<group>[\w-]{3})(?<others>[\w-]{3})",
RegexOptions.IgnoreCase);
if (perms.Success)
{
if (perms.Groups["owner"].Value.Length == 3)
{
if (perms.Groups["owner"].Value[0] == 'r')
{
item.OwnerPermissions |= FtpPermission.Read;
}
if (perms.Groups["owner"].Value[1] == 'w')
{
item.OwnerPermissions |= FtpPermission.Write;
}
if (perms.Groups["owner"].Value[2] == 'x' || perms.Groups["owner"].Value[2] == 's')
{
item.OwnerPermissions |= FtpPermission.Execute;
}
if (perms.Groups["owner"].Value[2] == 's' || perms.Groups["owner"].Value[2] == 'S')
{
item.SpecialPermissions |= FtpSpecialPermissions.SetUserID;
}
}
if (perms.Groups["group"].Value.Length == 3)
{
if (perms.Groups["group"].Value[0] == 'r')
{
item.GroupPermissions |= FtpPermission.Read;
}
if (perms.Groups["group"].Value[1] == 'w')
{
item.GroupPermissions |= FtpPermission.Write;
}
if (perms.Groups["group"].Value[2] == 'x' || perms.Groups["group"].Value[2] == 's')
{
item.GroupPermissions |= FtpPermission.Execute;
}
if (perms.Groups["group"].Value[2] == 's' || perms.Groups["group"].Value[2] == 'S')
{
item.SpecialPermissions |= FtpSpecialPermissions.SetGroupID;
}
}
if (perms.Groups["others"].Value.Length == 3)
{
if (perms.Groups["others"].Value[0] == 'r')
{
item.OthersPermissions |= FtpPermission.Read;
}
if (perms.Groups["others"].Value[1] == 'w')
{
item.OthersPermissions |= FtpPermission.Write;
}
if (perms.Groups["others"].Value[2] == 'x' || perms.Groups["others"].Value[2] == 't')
{
item.OthersPermissions |= FtpPermission.Execute;
}
if (perms.Groups["others"].Value[2] == 't' || perms.Groups["others"].Value[2] == 'T')
{
item.SpecialPermissions |= FtpSpecialPermissions.Sticky;
}
}
}
}
return(item);
}
/// <summary>
/// Connect to the specified host
/// </summary>
/// <param name="host">The host to connect to</param>
/// <param name="port">The port to connect to</param>
/// <param name="ipVersions">Internet Protocol versions to support durring the connection phase</param>
public void Connect(string host, int port, FtpIpVersion ipVersions)
{
IAsyncResult ar = null;
IPAddress[] addresses = Dns.GetHostAddresses(host);
if (ipVersions == 0)
{
throw new ArgumentException("The ipVersions parameter must contain at least 1 flag.");
}
for (int i = 0; i < addresses.Length; i++)
{
#if DEBUG
FtpTrace.WriteLine("{0}: {1}", addresses[i].AddressFamily.ToString(), addresses[i].ToString());
#endif
// we don't need to do this check unless
// a particular version of IP has been
// omitted so we won't.
if (ipVersions != FtpIpVersion.ANY)
{
switch (addresses[i].AddressFamily)
{
case AddressFamily.InterNetwork:
if ((ipVersions & FtpIpVersion.IPv4) != FtpIpVersion.IPv4)
{
#if DEBUG
FtpTrace.WriteLine("SKIPPED!");
#endif
continue;
}
break;
case AddressFamily.InterNetworkV6:
if ((ipVersions & FtpIpVersion.IPv6) != FtpIpVersion.IPv6)
{
#if DEBUG
FtpTrace.WriteLine("SKIPPED!");
#endif
continue;
}
break;
}
}
m_socket = new Socket(addresses[i].AddressFamily, SocketType.Stream, ProtocolType.Tcp);
ar = m_socket.BeginConnect(addresses[i], port, null, null);
if (addresses[i].ToString() != "::1") // 21Nov2014 Added by Lemu
{
if (!ar.AsyncWaitHandle.WaitOne(m_connectTimeout, true))
{
Close();
// check to see if we're out of addresses
// and if we are throw a TimeoutException
if (i + 1 == addresses.Length)
{
throw new TimeoutException("Timed out trying to connect!");
}
}
else
{
m_socket.EndConnect(ar);
// we got a connection, break out
// of the loop.
break;
}
}
}
// make sure that we actually connected to
// one of the addresses returned from GetHostAddresses()
if (m_socket == null || !m_socket.Connected)
{
Close();
throw new IOException("Failed to connect to host.");
}
m_netStream = new NetworkStream(m_socket);
m_lastActivity = DateTime.Now;
}
/// <summary>
/// Parses a line from a file listing using the first successful match in the Parsers collection.
/// </summary>
/// <param name="path">The source path of the file listing</param>
/// <param name="buf">A line from the file listing</param>
/// <param name="capabilities">Server capabilities</param>
/// <returns>A FtpListItem object representing the parsed line, null if the line was
/// unable to be parsed. If you have encountered an unsupported list type add a parser
/// to the public static Parsers collection of FtpListItem.</returns>
public static FtpListItem Parse(string path, string buf, FtpCapability capabilities)
{
if (buf != null && buf.Length > 0)
{
FtpListItem item;
foreach (Parser parser in Parsers)
{
if ((item = parser(buf, capabilities)) != null)
{
// if this is a vax/openvms file listing
// there are no slashes in the path name
if (parser == (new Parser(ParseVaxList)))
{
item.FullName = path + item.Name;
}
else
{
FtpTrace.WriteLine(item.Name);
// remove globbing/wildcard from path
if (path.GetFtpFileName().Contains("*"))
{
path = path.GetFtpDirectoryName();
}
if (item.Name != null)
{
// absolute path? then ignore the path input to this method.
if (item.Name.StartsWith("/") || item.Name.StartsWith("./") || item.Name.StartsWith("../"))
{
item.FullName = item.Name;
item.Name = item.Name.GetFtpFileName();
}
else if (path != null)
{
item.FullName = path.GetFtpPath(item.Name); //.GetFtpPathWithoutGlob();
}
else
{
FtpTrace.WriteLine("Couldn't determine the full path of this object:{0}{1}",
Environment.NewLine, item.ToString());
}
}
// if a link target is set and it doesn't include an absolute path
// then try to resolve it.
if (item.LinkTarget != null && !item.LinkTarget.StartsWith("/"))
{
if (item.LinkTarget.StartsWith("./"))
{
item.LinkTarget = path.GetFtpPath(item.LinkTarget.Remove(0, 2));
}
else
{
item.LinkTarget = path.GetFtpPath(item.LinkTarget);
}
}
}
item.Input = buf;
return(item);
}
}
}
return(null);
}
public new void Dispose()
{
FtpTrace.WriteLine("Disposing FtpSocketStream...");
Close();
}