/// <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>
static FtpListItem ParseUnixList(string buf, FtpCapability capabilities, FtpClient client)
{
FtpListItem item = new FtpListItem();
Match m = null;
string regex =
@"(?<permissions>[\w-]{10})\s+" +
@"(?<objectcount>\d+)\s+" +
@"(?<user>[\w\d]+)\s+" +
@"(?<group>[\w\d]+)\s+" +
@"(?<size>\d+)\s+" +
@"(?<modify>\w+\s+\d+\s+\d+:\d+|\w+\s+\d+\s+\d+)\s+" +
@"(?<name>.*)$";
if (!(m = Regex.Match(buf, regex, RegexOptions.IgnoreCase)).Success)
{
return(null);
}
if (m.Groups["permissions"].Value.StartsWith("d"))
{
item.Type = FtpFileSystemObjectType.Directory;
}
else if (m.Groups["permissions"].Value.StartsWith("-"))
{
item.Type = FtpFileSystemObjectType.File;
}
else
{
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;
if (item.Type == FtpFileSystemObjectType.Directory && (item.Name == "." || item.Name == ".."))
{
return(null);
}
////
// 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.HasFlag(FtpCapability.MDTM) || item.Type == FtpFileSystemObjectType.Directory) && m.Groups["modify"].Value.Length > 0)
{
item.Modified = m.Groups["modify"].Value.GetFtpDate(DateTimeStyles.AssumeUniversal);
}
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>
/// 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>
static FtpListItem ParseUnixList(string buf, FtpCapability capabilities)
{
string regex =
@"(?<permissions>[\w-]{10})\s+" +
@"(?<objectcount>\d+)\s+" +
@"(?<user>[\w\d]+)\s+" +
@"(?<group>[\w\d]+)\s+" +
@"(?<size>\d+)\s+" +
@"(?<modify>\w+\s+\d+\s+\d+:\d+|\w+\s+\d+\s+\d+)\s+" +
@"(?<name>.*)$";
FtpListItem item = new FtpListItem();
Match m;
if (!(m = Regex.Match(buf, regex, RegexOptions.IgnoreCase)).Success)
return null;
if (m.Groups["permissions"].Value.StartsWith("d"))
item.Type = FtpFileSystemObjectType.Directory;
else if (m.Groups["permissions"].Value.StartsWith("-"))
item.Type = FtpFileSystemObjectType.File;
else
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;
if (item.Type == FtpFileSystemObjectType.Directory && (item.Name == "." || item.Name == ".."))
return null;
////
// 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.HasFlag(FtpCapability.MDTM) || item.Type == FtpFileSystemObjectType.Directory) && m.Groups["modify"].Value.Length > 0)
item.Modified = m.Groups["modify"].Value.GetFtpDate();
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 server
/// </summary>
public async Task ConnectAsync()
{
if (m_Stream == null)
{
m_Stream = new FtpStreamChannel();
}
else
{
if (IsConnected)
{
await DisconnectAsync();
}
}
if (HostName == null)
{
throw new FtpException("No host has been specified");
}
if (Credentials == null)
{
throw new FtpException("No credentials have been specified");
}
FtpResponse reply;
if (await m_Stream.ConnectAsync(HostName, ServiceName))
{
if (!(reply = await GetReplyAsync()).Success)
{
if (reply.Code == null)
{
throw new IOException("The connection was terminated before a greeting could be read.");
}
throw new FtpCommandException(reply);
}
}
// TODO: If the encryption mode is set to explicit, raise to SSL
if (Credentials != null)
{
await AuthenticateAsync(Credentials);
}
if ((reply = await m_Stream.GetFeaturesAsync()).Success)
{
m_Caps = ((FtpFeaturesResponse)reply).Features;
}
// Enable UTF8 if it's available
if (m_Caps.HasFlag(FtpCapability.UTF8))
{
// If the server supports UTF8 it should already be enabled and this
// command should not matter however there are conflicting drafts
// about this so we'll just execute it to be safe.
await m_Stream.SetOptionsAsync("UTF8 ON");
m_Stream.Encoding = Encoding.UTF8;
}
}