/// <summary>
/// <para>Creates an array of commands, that will be sent to the server</para>
/// </summary>
protected override PipelineEntry[] BuildCommandsList(WebRequest req)
{
bool resetLoggedInState = false;
FtpWebRequest request = (FtpWebRequest)req;
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this);
}
_responseUri = request.RequestUri;
ArrayList commandList = new ArrayList();
if (request.EnableSsl && !UsingSecureStream)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("AUTH", "TLS")));
// According to RFC we need to re-authorize with USER/PASS after we re-authenticate.
resetLoggedInState = true;
}
if (resetLoggedInState)
{
_loginDirectory = null;
_establishedServerDirectory = null;
_requestedServerDirectory = null;
_currentTypeSetting = string.Empty;
if (_loginState == FtpLoginState.LoggedIn)
{
_loginState = FtpLoginState.LoggedInButNeedsRelogin;
}
}
if (_loginState != FtpLoginState.LoggedIn)
{
Credentials = request.Credentials.GetCredential(request.RequestUri, "basic");
_welcomeMessage = new StringBuilder();
_exitMessage = new StringBuilder();
string domainUserName = string.Empty;
string password = string.Empty;
if (Credentials != null)
{
domainUserName = Credentials.UserName;
string domain = Credentials.Domain;
if (!string.IsNullOrEmpty(domain))
{
domainUserName = domain + "\\" + domainUserName;
}
password = Credentials.Password;
}
if (domainUserName.Length == 0 && password.Length == 0)
{
domainUserName = "******";
password = "******";
}
commandList.Add(new PipelineEntry(FormatFtpCommand("USER", domainUserName)));
commandList.Add(new PipelineEntry(FormatFtpCommand("PASS", password), PipelineEntryFlags.DontLogParameter));
// If SSL, always configure data channel encryption after authentication to maximum RFC compatibility. The RFC allows for
// PBSZ/PROT commands to come either before or after the USER/PASS, but some servers require USER/PASS immediately after
// the AUTH TLS command.
if (request.EnableSsl && !UsingSecureStream)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("PBSZ", "0")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PROT", "P")));
}
commandList.Add(new PipelineEntry(FormatFtpCommand("OPTS", "utf8 on")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PWD", null)));
}
GetPathOption getPathOption = GetPathOption.Normal;
if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
getPathOption = GetPathOption.AssumeNoFilename;
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.ParameterIsDirectory))
{
getPathOption = GetPathOption.AssumeFilename;
}
string requestPath;
string requestDirectory;
string requestFilename;
GetPathInfo(getPathOption, request.RequestUri, out requestPath, out requestDirectory, out requestFilename);
if (requestFilename.Length == 0 && request.MethodInfo.HasFlag(FtpMethodFlags.TakesParameter))
{
throw new WebException(SR.net_ftp_invalid_uri);
}
// We optimize for having the current working directory staying at the login directory. This ensure that
// our relative paths work right and reduces unnecessary CWD commands.
// Usually, we don't change the working directory except for some FTP commands. If necessary,
// we need to reset our working directory back to the login directory.
if (_establishedServerDirectory != null && _loginDirectory != null && _establishedServerDirectory != _loginDirectory)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("CWD", _loginDirectory), PipelineEntryFlags.UserCommand));
_requestedServerDirectory = _loginDirectory;
}
// For most commands, we don't need to navigate to the directory since we pass in the full
// path as part of the FTP protocol command. However, some commands require it.
if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath) && requestDirectory.Length > 0)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("CWD", requestDirectory), PipelineEntryFlags.UserCommand));
_requestedServerDirectory = requestDirectory;
}
if (!request.MethodInfo.IsCommandOnly)
{
string requestedTypeSetting = request.UseBinary ? "I" : "A";
if (_currentTypeSetting != requestedTypeSetting)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("TYPE", requestedTypeSetting)));
_currentTypeSetting = requestedTypeSetting;
}
if (request.UsePassive)
{
string passiveCommand = (ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PASV" : "EPSV";
commandList.Add(new PipelineEntry(FormatFtpCommand(passiveCommand, null), PipelineEntryFlags.CreateDataConnection));
}
else
{
string portCommand = (ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PORT" : "EPRT";
CreateFtpListenerSocket(request);
commandList.Add(new PipelineEntry(FormatFtpCommand(portCommand, GetPortCommandLine(request))));
}
if (request.ContentOffset > 0)
{
// REST command must always be the last sent before the main file command is sent.
commandList.Add(new PipelineEntry(FormatFtpCommand("REST", request.ContentOffset.ToString(CultureInfo.InvariantCulture))));
}
}
PipelineEntryFlags flags = PipelineEntryFlags.UserCommand;
if (!request.MethodInfo.IsCommandOnly)
{
flags |= PipelineEntryFlags.GiveDataStream;
if (!request.UsePassive)
{
flags |= PipelineEntryFlags.CreateDataConnection;
}
}
if (request.MethodInfo.Operation == FtpOperation.Rename)
{
string baseDir = (requestDirectory == string.Empty)
? string.Empty : requestDirectory + "/";
commandList.Add(new PipelineEntry(FormatFtpCommand("RNFR", baseDir + requestFilename), flags));
string renameTo;
if (!string.IsNullOrEmpty(request.RenameTo) &&
request.RenameTo.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
renameTo = request.RenameTo; // Absolute path
}
else
{
renameTo = baseDir + request.RenameTo; // Relative path
}
commandList.Add(new PipelineEntry(FormatFtpCommand("RNTO", renameTo), flags));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, string.Empty), flags));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath))
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, requestFilename), flags));
}
else
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, requestPath), flags));
}
commandList.Add(new PipelineEntry(FormatFtpCommand("QUIT", null)));
return((PipelineEntry[])commandList.ToArray(typeof(PipelineEntry)));
}
/// <summary>
/// <para>Creates an array of commands, that will be sent to the server</para>
/// </summary>
protected override PipelineEntry[] BuildCommandsList(WebRequest req)
{
bool resetLoggedInState = false;
FtpWebRequest request = (FtpWebRequest)req;
if (NetEventSource.IsEnabled) NetEventSource.Info(this);
_responseUri = request.RequestUri;
ArrayList commandList = new ArrayList();
if (request.EnableSsl && !UsingSecureStream)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("AUTH", "TLS")));
// According to RFC we need to re-authorize with USER/PASS after we re-authenticate.
resetLoggedInState = true;
}
if (resetLoggedInState)
{
_loginDirectory = null;
_establishedServerDirectory = null;
_requestedServerDirectory = null;
_currentTypeSetting = string.Empty;
if (_loginState == FtpLoginState.LoggedIn)
_loginState = FtpLoginState.LoggedInButNeedsRelogin;
}
if (_loginState != FtpLoginState.LoggedIn)
{
Credentials = request.Credentials.GetCredential(request.RequestUri, "basic");
_welcomeMessage = new StringBuilder();
_exitMessage = new StringBuilder();
string domainUserName = string.Empty;
string password = string.Empty;
if (Credentials != null)
{
domainUserName = Credentials.UserName;
string domain = Credentials.Domain;
if (!string.IsNullOrEmpty(domain))
{
domainUserName = domain + "\\" + domainUserName;
}
password = Credentials.Password;
}
if (domainUserName.Length == 0 && password.Length == 0)
{
domainUserName = "******";
password = "******";
}
commandList.Add(new PipelineEntry(FormatFtpCommand("USER", domainUserName)));
commandList.Add(new PipelineEntry(FormatFtpCommand("PASS", password), PipelineEntryFlags.DontLogParameter));
// If SSL, always configure data channel encryption after authentication to maximum RFC compatibility. The RFC allows for
// PBSZ/PROT commands to come either before or after the USER/PASS, but some servers require USER/PASS immediately after
// the AUTH TLS command.
if (request.EnableSsl && !UsingSecureStream)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("PBSZ", "0")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PROT", "P")));
}
commandList.Add(new PipelineEntry(FormatFtpCommand("OPTS", "utf8 on")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PWD", null)));
}
GetPathOption getPathOption = GetPathOption.Normal;
if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
getPathOption = GetPathOption.AssumeNoFilename;
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.ParameterIsDirectory))
{
getPathOption = GetPathOption.AssumeFilename;
}
string requestPath;
string requestDirectory;
string requestFilename;
GetPathInfo(getPathOption, request.RequestUri, out requestPath, out requestDirectory, out requestFilename);
if (requestFilename.Length == 0 && request.MethodInfo.HasFlag(FtpMethodFlags.TakesParameter))
throw new WebException(SR.net_ftp_invalid_uri);
// We optimize for having the current working directory staying at the login directory. This ensure that
// our relative paths work right and reduces unnecessary CWD commands.
// Usually, we don't change the working directory except for some FTP commands. If necessary,
// we need to reset our working directory back to the login directory.
if (_establishedServerDirectory != null && _loginDirectory != null && _establishedServerDirectory != _loginDirectory)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("CWD", _loginDirectory), PipelineEntryFlags.UserCommand));
_requestedServerDirectory = _loginDirectory;
}
// For most commands, we don't need to navigate to the directory since we pass in the full
// path as part of the FTP protocol command. However, some commands require it.
if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath) && requestDirectory.Length > 0)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("CWD", requestDirectory), PipelineEntryFlags.UserCommand));
_requestedServerDirectory = requestDirectory;
}
if (!request.MethodInfo.IsCommandOnly)
{
string requestedTypeSetting = request.UseBinary ? "I" : "A";
if (_currentTypeSetting != requestedTypeSetting)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("TYPE", requestedTypeSetting)));
_currentTypeSetting = requestedTypeSetting;
}
if (request.UsePassive)
{
string passiveCommand = (ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PASV" : "EPSV";
commandList.Add(new PipelineEntry(FormatFtpCommand(passiveCommand, null), PipelineEntryFlags.CreateDataConnection));
}
else
{
string portCommand = (ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PORT" : "EPRT";
CreateFtpListenerSocket(request);
commandList.Add(new PipelineEntry(FormatFtpCommand(portCommand, GetPortCommandLine(request))));
}
if (request.ContentOffset > 0)
{
// REST command must always be the last sent before the main file command is sent.
commandList.Add(new PipelineEntry(FormatFtpCommand("REST", request.ContentOffset.ToString(CultureInfo.InvariantCulture))));
}
}
PipelineEntryFlags flags = PipelineEntryFlags.UserCommand;
if (!request.MethodInfo.IsCommandOnly)
{
flags |= PipelineEntryFlags.GiveDataStream;
if (!request.UsePassive)
flags |= PipelineEntryFlags.CreateDataConnection;
}
if (request.MethodInfo.Operation == FtpOperation.Rename)
{
string baseDir = (requestDirectory == string.Empty)
? string.Empty : requestDirectory + "/";
commandList.Add(new PipelineEntry(FormatFtpCommand("RNFR", baseDir + requestFilename), flags));
string renameTo;
if (!string.IsNullOrEmpty(request.RenameTo)
&& request.RenameTo.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
renameTo = request.RenameTo; // Absolute path
}
else
{
renameTo = baseDir + request.RenameTo; // Relative path
}
commandList.Add(new PipelineEntry(FormatFtpCommand("RNTO", renameTo), flags));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, string.Empty), flags));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath))
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, requestFilename), flags));
}
else
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, requestPath), flags));
}
commandList.Add(new PipelineEntry(FormatFtpCommand("QUIT", null)));
return (PipelineEntry[])commandList.ToArray(typeof(PipelineEntry));
}
// This is called by underlying base class code, each time a new response is received from the wire or a protocol stage is resumed.
// This function controls the setting up of a data socket/connection, and of saving off the server responses.
protected override PipelineInstruction PipelineCallback(PipelineEntry entry, ResponseDescription response, bool timeout, ref Stream stream)
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(this, $"Command:{entry?.Command} Description:{response?.StatusDescription}");
}
// null response is not expected
if (response == null)
{
return(PipelineInstruction.Abort);
}
FtpStatusCode status = (FtpStatusCode)response.Status;
//
// Update global "current status" for FtpWebRequest
//
if (status != FtpStatusCode.ClosingControl)
{
// A 221 status won't be reflected on the user FTP response
// Anything else will (by design?)
StatusCode = status;
StatusLine = response.StatusDescription;
}
// If the status code is outside the range defined in RFC (1xx to 5xx) throw
if (response.InvalidStatusCode)
{
throw new WebException(SR.net_InvalidStatusCode, WebExceptionStatus.ProtocolError);
}
// Update the banner message if any, this is a little hack because the "entry" param is null
if (_index == -1)
{
if (status == FtpStatusCode.SendUserCommand)
{
_bannerMessage = new StringBuilder();
_bannerMessage.Append(StatusLine);
return(PipelineInstruction.Advance);
}
else if (status == FtpStatusCode.ServiceTemporarilyNotAvailable)
{
return(PipelineInstruction.Reread);
}
else
{
throw GenerateException(status, response.StatusDescription, null);
}
}
//
// Check for the result of our attempt to use UTF8
//
if (entry.Command == "OPTS utf8 on\r\n")
{
if (response.PositiveCompletion)
{
Encoding = Encoding.UTF8;
}
else
{
Encoding = Encoding.Default;
}
return(PipelineInstruction.Advance);
}
// If we are already logged in and the server returns 530 then
// the server does not support re-issuing a USER command,
// tear down the connection and start all over again
if (entry.Command.IndexOf("USER") != -1)
{
// The server may not require a password for this user, so bypass the password command
if (status == FtpStatusCode.LoggedInProceed)
{
_loginState = FtpLoginState.LoggedIn;
_index++;
}
}
//
// Throw on an error with possible recovery option
//
if (response.TransientFailure || response.PermanentFailure)
{
if (status == FtpStatusCode.ServiceNotAvailable)
{
MarkAsRecoverableFailure();
}
throw GenerateException(status, response.StatusDescription, null);
}
if (_loginState != FtpLoginState.LoggedIn &&
entry.Command.IndexOf("PASS") != -1)
{
// Note the fact that we logged in
if (status == FtpStatusCode.NeedLoginAccount || status == FtpStatusCode.LoggedInProceed)
{
_loginState = FtpLoginState.LoggedIn;
}
else
{
throw GenerateException(status, response.StatusDescription, null);
}
}
//
// Parse special cases
//
if (entry.HasFlag(PipelineEntryFlags.CreateDataConnection) && (response.PositiveCompletion || response.PositiveIntermediate))
{
bool isSocketReady;
PipelineInstruction result = QueueOrCreateDataConection(entry, response, timeout, ref stream, out isSocketReady);
if (!isSocketReady)
{
return(result);
}
// otherwise we have a stream to create
}
//
// This is part of the above case and it's all about giving data stream back
//
if (status == FtpStatusCode.OpeningData || status == FtpStatusCode.DataAlreadyOpen)
{
if (_dataSocket == null)
{
return(PipelineInstruction.Abort);
}
if (!entry.HasFlag(PipelineEntryFlags.GiveDataStream))
{
_abortReason = SR.Format(SR.net_ftp_invalid_status_response, status, entry.Command);
return(PipelineInstruction.Abort);
}
// Parse out the Content length, if we can
TryUpdateContentLength(response.StatusDescription);
// Parse out the file name, when it is returned and use it for our ResponseUri
FtpWebRequest request = (FtpWebRequest)_request;
if (request.MethodInfo.ShouldParseForResponseUri)
{
TryUpdateResponseUri(response.StatusDescription, request);
}
return(QueueOrCreateFtpDataStream(ref stream));
}
//
// Parse responses by status code exclusivelly
//
// Update welcome message
if (status == FtpStatusCode.LoggedInProceed)
{
_welcomeMessage.Append(StatusLine);
}
// OR set the user response ExitMessage
else if (status == FtpStatusCode.ClosingControl)
{
_exitMessage.Append(response.StatusDescription);
// And close the control stream socket on "QUIT"
CloseSocket();
}
// OR set us up for SSL/TLS, after this we'll be writing securely
else if (status == FtpStatusCode.ServerWantsSecureSession)
{
// If NetworkStream is a TlsStream, then this must be in the async callback
// from completing the SSL handshake.
// So just let the pipeline continue.
if (!(NetworkStream is TlsStream))
{
FtpWebRequest request = (FtpWebRequest)_request;
TlsStream tlsStream = new TlsStream(NetworkStream, Socket, request.RequestUri.Host, request.ClientCertificates);
if (_isAsync)
{
tlsStream.BeginAuthenticateAsClient(ar =>
{
try
{
tlsStream.EndAuthenticateAsClient(ar);
NetworkStream = tlsStream;
this.ContinueCommandPipeline();
}
catch (Exception e)
{
this.CloseSocket();
this.InvokeRequestCallback(e);
}
}, null);
return(PipelineInstruction.Pause);
}
else
{
tlsStream.AuthenticateAsClient();
NetworkStream = tlsStream;
}
}
}
// OR parse out the file size or file time, usually a result of sending SIZE/MDTM commands
else if (status == FtpStatusCode.FileStatus)
{
FtpWebRequest request = (FtpWebRequest)_request;
if (entry.Command.StartsWith("SIZE "))
{
_contentLength = GetContentLengthFrom213Response(response.StatusDescription);
}
else if (entry.Command.StartsWith("MDTM "))
{
_lastModified = GetLastModifiedFrom213Response(response.StatusDescription);
}
}
// OR parse out our login directory
else if (status == FtpStatusCode.PathnameCreated)
{
if (entry.Command == "PWD\r\n" && !entry.HasFlag(PipelineEntryFlags.UserCommand))
{
_loginDirectory = GetLoginDirectory(response.StatusDescription);
}
}
// Asserting we have some positive response
else
{
// We only use CWD to reset ourselves back to the login directory.
if (entry.Command.IndexOf("CWD") != -1)
{
_establishedServerDirectory = _requestedServerDirectory;
}
}
// Intermediate responses require rereading
if (response.PositiveIntermediate || (!UsingSecureStream && entry.Command == "AUTH TLS\r\n"))
{
return(PipelineInstruction.Reread);
}
return(PipelineInstruction.Advance);
}
protected override CommandStream.PipelineEntry[] BuildCommandsList(WebRequest req)
{
string str3;
string str4;
string str5;
bool flag = false;
FtpWebRequest request = (FtpWebRequest)req;
this.m_ResponseUri = request.RequestUri;
ArrayList list = new ArrayList();
if (request.EnableSsl && !base.UsingSecureStream)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("AUTH", "TLS")));
flag = true;
}
if (flag)
{
this.m_LoginDirectory = null;
this.m_EstablishedServerDirectory = null;
this.m_RequestedServerDirectory = null;
this.m_CurrentTypeSetting = string.Empty;
if (this.m_LoginState == FtpLoginState.LoggedIn)
{
this.m_LoginState = FtpLoginState.LoggedInButNeedsRelogin;
}
}
if (this.m_LoginState != FtpLoginState.LoggedIn)
{
this.Credentials = request.Credentials.GetCredential(request.RequestUri, "basic");
this.m_WelcomeMessage = new StringBuilder();
this.m_ExitMessage = new StringBuilder();
string parameter = string.Empty;
string password = string.Empty;
if (this.Credentials != null)
{
parameter = this.Credentials.InternalGetDomainUserName();
password = this.Credentials.InternalGetPassword();
}
if ((parameter.Length == 0) && (password.Length == 0))
{
parameter = "anonymous";
password = "******";
}
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("USER", parameter)));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("PASS", password), CommandStream.PipelineEntryFlags.DontLogParameter));
if (request.EnableSsl && !base.UsingSecureStream)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("PBSZ", "0")));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("PROT", "P")));
}
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("OPTS", "utf8 on")));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("PWD", null)));
}
GetPathOption normal = GetPathOption.Normal;
if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
normal = GetPathOption.AssumeNoFilename;
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.ParameterIsDirectory))
{
normal = GetPathOption.AssumeFilename;
}
GetPathInfo(normal, request.RequestUri, out str3, out str4, out str5);
if ((str5.Length == 0) && request.MethodInfo.HasFlag(FtpMethodFlags.TakesParameter))
{
throw new WebException(SR.GetString("net_ftp_invalid_uri"));
}
if (((this.m_EstablishedServerDirectory != null) && (this.m_LoginDirectory != null)) && (this.m_EstablishedServerDirectory != this.m_LoginDirectory))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("CWD", this.m_LoginDirectory), CommandStream.PipelineEntryFlags.UserCommand));
this.m_RequestedServerDirectory = this.m_LoginDirectory;
}
if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath) && (str4.Length > 0))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("CWD", str4), CommandStream.PipelineEntryFlags.UserCommand));
this.m_RequestedServerDirectory = str4;
}
if (((request.CacheProtocol != null) && (request.CacheProtocol.ProtocolStatus == CacheValidationStatus.DoNotTakeFromCache)) && (request.MethodInfo.Operation == FtpOperation.DownloadFile))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("MDTM", str3)));
}
if (!request.MethodInfo.IsCommandOnly)
{
if ((request.CacheProtocol == null) || (request.CacheProtocol.ProtocolStatus != CacheValidationStatus.Continue))
{
string str6 = request.UseBinary ? "I" : "A";
if (this.m_CurrentTypeSetting != str6)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("TYPE", str6)));
this.m_CurrentTypeSetting = str6;
}
if (request.UsePassive)
{
string command = (base.ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PASV" : "EPSV";
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(command, null), CommandStream.PipelineEntryFlags.CreateDataConnection));
}
else
{
string str8 = (base.ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PORT" : "EPRT";
this.CreateFtpListenerSocket(request);
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(str8, this.GetPortCommandLine(request))));
}
if ((request.CacheProtocol != null) && (request.CacheProtocol.ProtocolStatus == CacheValidationStatus.CombineCachedAndServerResponse))
{
if (request.CacheProtocol.Validator.CacheEntry.StreamSize > 0L)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("REST", request.CacheProtocol.Validator.CacheEntry.StreamSize.ToString(CultureInfo.InvariantCulture))));
}
}
else if (request.ContentOffset > 0L)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("REST", request.ContentOffset.ToString(CultureInfo.InvariantCulture))));
}
}
else
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("SIZE", str3)));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("MDTM", str3)));
}
}
if ((request.CacheProtocol == null) || (request.CacheProtocol.ProtocolStatus != CacheValidationStatus.Continue))
{
CommandStream.PipelineEntryFlags userCommand = CommandStream.PipelineEntryFlags.UserCommand;
if (!request.MethodInfo.IsCommandOnly)
{
userCommand |= CommandStream.PipelineEntryFlags.GiveDataStream;
if (!request.UsePassive)
{
userCommand |= CommandStream.PipelineEntryFlags.CreateDataConnection;
}
}
if (request.MethodInfo.Operation == FtpOperation.Rename)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("RNFR", str4 + "/" + str5), userCommand));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("RNTO", str4 + "/" + request.RenameTo), userCommand));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(request.Method, string.Empty), userCommand));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(request.Method, str5), userCommand));
}
else
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(request.Method, str3), userCommand));
}
if (!request.KeepAlive)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("QUIT", null)));
}
}
return((CommandStream.PipelineEntry[])list.ToArray(typeof(CommandStream.PipelineEntry)));
}
// This is called by underlying base class code, each time a new response is received from the wire or a protocol stage is resumed.
// This function controls the setting up of a data socket/connection, and of saving off the server responses.
protected override PipelineInstruction PipelineCallback(PipelineEntry entry, ResponseDescription response, bool timeout, ref Stream stream)
{
if (NetEventSource.IsEnabled) NetEventSource.Info(this, $"Command:{entry?.Command} Description:{response?.StatusDescription}");
// null response is not expected
if (response == null)
return PipelineInstruction.Abort;
FtpStatusCode status = (FtpStatusCode)response.Status;
//
// Update global "current status" for FtpWebRequest
//
if (status != FtpStatusCode.ClosingControl)
{
// A 221 status won't be reflected on the user FTP response
// Anything else will (by design?)
StatusCode = status;
StatusLine = response.StatusDescription;
}
// If the status code is outside the range defined in RFC (1xx to 5xx) throw
if (response.InvalidStatusCode)
throw new WebException(SR.net_InvalidStatusCode, WebExceptionStatus.ProtocolError);
// Update the banner message if any, this is a little hack because the "entry" param is null
if (_index == -1)
{
if (status == FtpStatusCode.SendUserCommand)
{
_bannerMessage = new StringBuilder();
_bannerMessage.Append(StatusLine);
return PipelineInstruction.Advance;
}
else if (status == FtpStatusCode.ServiceTemporarilyNotAvailable)
{
return PipelineInstruction.Reread;
}
else
throw GenerateException(status, response.StatusDescription, null);
}
//
// Check for the result of our attempt to use UTF8
//
if (entry.Command == "OPTS utf8 on\r\n")
{
if (response.PositiveCompletion)
{
Encoding = Encoding.UTF8;
}
else
{
Encoding = Encoding.Default;
}
return PipelineInstruction.Advance;
}
// If we are already logged in and the server returns 530 then
// the server does not support re-issuing a USER command,
// tear down the connection and start all over again
if (entry.Command.IndexOf("USER") != -1)
{
// The server may not require a password for this user, so bypass the password command
if (status == FtpStatusCode.LoggedInProceed)
{
_loginState = FtpLoginState.LoggedIn;
_index++;
}
}
//
// Throw on an error with possible recovery option
//
if (response.TransientFailure || response.PermanentFailure)
{
if (status == FtpStatusCode.ServiceNotAvailable)
{
MarkAsRecoverableFailure();
}
throw GenerateException(status, response.StatusDescription, null);
}
if (_loginState != FtpLoginState.LoggedIn
&& entry.Command.IndexOf("PASS") != -1)
{
// Note the fact that we logged in
if (status == FtpStatusCode.NeedLoginAccount || status == FtpStatusCode.LoggedInProceed)
_loginState = FtpLoginState.LoggedIn;
else
throw GenerateException(status, response.StatusDescription, null);
}
//
// Parse special cases
//
if (entry.HasFlag(PipelineEntryFlags.CreateDataConnection) && (response.PositiveCompletion || response.PositiveIntermediate))
{
bool isSocketReady;
PipelineInstruction result = QueueOrCreateDataConection(entry, response, timeout, ref stream, out isSocketReady);
if (!isSocketReady)
return result;
// otheriwse we have a stream to create
}
//
// This is part of the above case and it's all about giving data stream back
//
if (status == FtpStatusCode.OpeningData || status == FtpStatusCode.DataAlreadyOpen)
{
if (_dataSocket == null)
{
return PipelineInstruction.Abort;
}
if (!entry.HasFlag(PipelineEntryFlags.GiveDataStream))
{
_abortReason = SR.Format(SR.net_ftp_invalid_status_response, status, entry.Command);
return PipelineInstruction.Abort;
}
// Parse out the Content length, if we can
TryUpdateContentLength(response.StatusDescription);
// Parse out the file name, when it is returned and use it for our ResponseUri
FtpWebRequest request = (FtpWebRequest)_request;
if (request.MethodInfo.ShouldParseForResponseUri)
{
TryUpdateResponseUri(response.StatusDescription, request);
}
return QueueOrCreateFtpDataStream(ref stream);
}
//
// Parse responses by status code exclusivelly
//
// Update welcome message
if (status == FtpStatusCode.LoggedInProceed)
{
_welcomeMessage.Append(StatusLine);
}
// OR set the user response ExitMessage
else if (status == FtpStatusCode.ClosingControl)
{
_exitMessage.Append(response.StatusDescription);
// And close the control stream socket on "QUIT"
CloseSocket();
}
// OR set us up for SSL/TLS, after this we'll be writing securely
else if (status == FtpStatusCode.ServerWantsSecureSession)
{
// If NetworkStream is a TlsStream, then this must be in the async callback
// from completing the SSL handshake.
// So just let the pipeline continue.
if (!(NetworkStream is TlsStream))
{
FtpWebRequest request = (FtpWebRequest)_request;
TlsStream tlsStream = new TlsStream(NetworkStream, Socket, request.RequestUri.Host, request.ClientCertificates);
if (_isAsync)
{
tlsStream.BeginAuthenticateAsClient(ar =>
{
try
{
tlsStream.EndAuthenticateAsClient(ar);
NetworkStream = tlsStream;
this.ContinueCommandPipeline();
}
catch (Exception e)
{
this.CloseSocket();
this.InvokeRequestCallback(e);
}
}, null);
return PipelineInstruction.Pause;
}
else
{
tlsStream.AuthenticateAsClient();
NetworkStream = tlsStream;
}
}
}
// OR parse out the file size or file time, usually a result of sending SIZE/MDTM commands
else if (status == FtpStatusCode.FileStatus)
{
FtpWebRequest request = (FtpWebRequest)_request;
if (entry.Command.StartsWith("SIZE "))
{
_contentLength = GetContentLengthFrom213Response(response.StatusDescription);
}
else if (entry.Command.StartsWith("MDTM "))
{
_lastModified = GetLastModifiedFrom213Response(response.StatusDescription);
}
}
// OR parse out our login directory
else if (status == FtpStatusCode.PathnameCreated)
{
if (entry.Command == "PWD\r\n" && !entry.HasFlag(PipelineEntryFlags.UserCommand))
{
_loginDirectory = GetLoginDirectory(response.StatusDescription);
}
}
// Asserting we have some positive response
else
{
// We only use CWD to reset ourselves back to the login directory.
if (entry.Command.IndexOf("CWD") != -1)
{
_establishedServerDirectory = _requestedServerDirectory;
}
}
// Intermediate responses require rereading
if (response.PositiveIntermediate || (!UsingSecureStream && entry.Command == "AUTH TLS\r\n"))
{
return PipelineInstruction.Reread;
}
return PipelineInstruction.Advance;
}
/// <summary>
/// <para>Creates an array of commands, that will be sent to the server</para>
/// </summary>
protected override PipelineEntry [] BuildCommandsList(WebRequest req) {
bool resetLoggedInState = false;
FtpWebRequest request = (FtpWebRequest) req;
GlobalLog.Print("FtpControlStream#" + ValidationHelper.HashString(this) + "BuildCommandsList");
m_ResponseUri = request.RequestUri;
ArrayList commandList = new ArrayList();
#if DEBUG
// the Credentials.IsEqualTo method is only compiled in DEBUG so the assert must be restricted to DEBUG
// as well
// While some FTP servers support it, in general, the RFC's don't allow re-issuing the USER command to
// change the authentication context of an existing logged in connection. We prevent re-using existing
// connections if the credentials are different from the previous FtpWebRequest. Let's make sure that
// our connection pooling code is working correctly.
Debug.Assert(Credentials == null ||
Credentials.IsEqualTo(request.Credentials.GetCredential(request.RequestUri, "basic")),
"Should not be re-using an existing connection with different credentials");
#endif
if (request.EnableSsl && !UsingSecureStream) {
commandList.Add(new PipelineEntry(FormatFtpCommand("AUTH", "TLS")));
// According to RFC we need to re-authorize with USER/PASS after we re-authenticate.
resetLoggedInState = true;
}
if (resetLoggedInState) {
m_LoginDirectory = null;
m_EstablishedServerDirectory = null;
m_RequestedServerDirectory = null;
m_CurrentTypeSetting = string.Empty;
if (m_LoginState == FtpLoginState.LoggedIn)
m_LoginState = FtpLoginState.LoggedInButNeedsRelogin;
}
if (m_LoginState != FtpLoginState.LoggedIn) {
Credentials = request.Credentials.GetCredential(request.RequestUri, "basic");
m_WelcomeMessage = new StringBuilder();
m_ExitMessage = new StringBuilder();
string domainUserName = string.Empty;
string password = string.Empty;
if (Credentials != null)
{
domainUserName = Credentials.InternalGetDomainUserName();
password = Credentials.InternalGetPassword();
}
if (domainUserName.Length == 0 && password.Length == 0)
{
domainUserName = "******";
password = "******";
}
commandList.Add(new PipelineEntry(FormatFtpCommand("USER", domainUserName)));
commandList.Add(new PipelineEntry(FormatFtpCommand("PASS", password), PipelineEntryFlags.DontLogParameter));
// If SSL, always configure data channel encryption after authentication to maximum RFC compatibility. The RFC allows for
// PBSZ/PROT commands to come either before or after the USER/PASS, but some servers require USER/PASS immediately after
// the AUTH TLS command.
if (request.EnableSsl && !UsingSecureStream)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("PBSZ", "0")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PROT", "P")));
}
commandList.Add(new PipelineEntry(FormatFtpCommand("OPTS", "utf8 on")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PWD", null)));
}
GetPathOption getPathOption = GetPathOption.Normal;
if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
getPathOption = GetPathOption.AssumeNoFilename;
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.ParameterIsDirectory))
{
getPathOption = GetPathOption.AssumeFilename;
}
string requestPath;
string requestDirectory;
string requestFilename;
GetPathInfo(getPathOption, request.RequestUri, out requestPath, out requestDirectory, out requestFilename);
if (requestFilename.Length == 0 && request.MethodInfo.HasFlag(FtpMethodFlags.TakesParameter))
throw new WebException(SR.GetString(SR.net_ftp_invalid_uri));
// We optimize for having the current working directory staying at the login directory. This ensure that
// our relative paths work right and reduces unnecessary CWD commands.
// Usually, we don't change the working directory except for some FTP commands. If necessary,
// we need to reset our working directory back to the login directory.
if (m_EstablishedServerDirectory != null && m_LoginDirectory != null && m_EstablishedServerDirectory != m_LoginDirectory)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("CWD", m_LoginDirectory), PipelineEntryFlags.UserCommand));
m_RequestedServerDirectory = m_LoginDirectory;
}
// For most commands, we don't need to navigate to the directory since we pass in the full
// path as part of the FTP protocol command. However, some commands require it.
if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath) && requestDirectory.Length > 0)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("CWD", requestDirectory), PipelineEntryFlags.UserCommand));
m_RequestedServerDirectory = requestDirectory;
}
if (request.CacheProtocol != null && request.CacheProtocol.ProtocolStatus == CacheValidationStatus.DoNotTakeFromCache && request.MethodInfo.Operation == FtpOperation.DownloadFile)
commandList.Add(new PipelineEntry(FormatFtpCommand("MDTM", requestPath)));
if (!request.MethodInfo.IsCommandOnly)
{
// This is why having a protocol logic on the connection is a bad idea
if (request.CacheProtocol == null || request.CacheProtocol.ProtocolStatus != CacheValidationStatus.Continue)
{
string requestedTypeSetting = request.UseBinary ? "I" : "A";
if (m_CurrentTypeSetting != requestedTypeSetting) {
commandList.Add(new PipelineEntry(FormatFtpCommand("TYPE", requestedTypeSetting)));
m_CurrentTypeSetting = requestedTypeSetting;
}
if (request.UsePassive) {
string passiveCommand = (ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PASV" : "EPSV";
commandList.Add(new PipelineEntry(FormatFtpCommand(passiveCommand, null), PipelineEntryFlags.CreateDataConnection));
} else {
string portCommand = (ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PORT" : "EPRT";
CreateFtpListenerSocket(request);
commandList.Add(new PipelineEntry(FormatFtpCommand(portCommand, GetPortCommandLine(request))));
}
if (request.CacheProtocol != null && request.CacheProtocol.ProtocolStatus == CacheValidationStatus.CombineCachedAndServerResponse)
{
// Combining partial cache with the reminder using "REST"
if (request.CacheProtocol.Validator.CacheEntry.StreamSize > 0)
commandList.Add(new PipelineEntry(FormatFtpCommand("REST", request.CacheProtocol.Validator.CacheEntry.StreamSize.ToString(CultureInfo.InvariantCulture))));
}
else if (request.ContentOffset > 0) {
// REST command must always be the last sent before the main file command is sent.
commandList.Add(new PipelineEntry(FormatFtpCommand("REST", request.ContentOffset.ToString(CultureInfo.InvariantCulture))));
}
}
else
{
// revalidating GetFileSize = "SIZE" GetDateTimeStamp = "MDTM"
commandList.Add(new PipelineEntry(FormatFtpCommand("SIZE", requestPath)));
commandList.Add(new PipelineEntry(FormatFtpCommand("MDTM", requestPath)));
}
}
//
// Suppress the data file if this is a revalidation request
//
if (request.CacheProtocol == null || request.CacheProtocol.ProtocolStatus != CacheValidationStatus.Continue)
{
PipelineEntryFlags flags = PipelineEntryFlags.UserCommand;
if (!request.MethodInfo.IsCommandOnly)
{
flags |= PipelineEntryFlags.GiveDataStream;
if (!request.UsePassive)
flags |= PipelineEntryFlags.CreateDataConnection;
}
if (request.MethodInfo.Operation == FtpOperation.Rename)
{
string baseDir = (requestDirectory == string.Empty)
? string.Empty : requestDirectory + "/";
commandList.Add(new PipelineEntry(FormatFtpCommand("RNFR", baseDir + requestFilename), flags));
string renameTo;
if (!string.IsNullOrEmpty(request.RenameTo)
&& request.RenameTo.StartsWith("/", StringComparison.OrdinalIgnoreCase))
{
renameTo = request.RenameTo; // Absolute path
}
else
{
renameTo = baseDir + request.RenameTo; // Relative path
}
commandList.Add(new PipelineEntry(FormatFtpCommand("RNTO", renameTo), flags));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, string.Empty), flags));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath))
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, requestFilename), flags));
}
else
{
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, requestPath), flags));
}
if (!request.KeepAlive)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("QUIT", null)));
}
}
return (PipelineEntry []) commandList.ToArray(typeof(PipelineEntry));
}
protected override CommandStream.PipelineInstruction PipelineCallback(CommandStream.PipelineEntry entry, ResponseDescription response, bool timeout, ref Stream stream)
{
if (response == null)
{
return(CommandStream.PipelineInstruction.Abort);
}
FtpStatusCode status = (FtpStatusCode)response.Status;
if (status != FtpStatusCode.ClosingControl)
{
this.StatusCode = status;
this.StatusLine = response.StatusDescription;
}
if (response.InvalidStatusCode)
{
throw new WebException(SR.GetString("net_InvalidStatusCode"), WebExceptionStatus.ProtocolError);
}
if (base.m_Index == -1)
{
switch (status)
{
case FtpStatusCode.SendUserCommand:
this.m_BannerMessage = new StringBuilder();
this.m_BannerMessage.Append(this.StatusLine);
return(CommandStream.PipelineInstruction.Advance);
case FtpStatusCode.ServiceTemporarilyNotAvailable:
return(CommandStream.PipelineInstruction.Reread);
}
throw base.GenerateException(status, response.StatusDescription, null);
}
if (entry.Command == "OPTS utf8 on\r\n")
{
if (response.PositiveCompletion)
{
base.Encoding = Encoding.UTF8;
}
else
{
base.Encoding = Encoding.Default;
}
return(CommandStream.PipelineInstruction.Advance);
}
if (entry.Command.IndexOf("USER") != -1)
{
if (status == FtpStatusCode.LoggedInProceed)
{
this.m_LoginState = FtpLoginState.LoggedIn;
base.m_Index++;
}
else if ((status == FtpStatusCode.NotLoggedIn) && (this.m_LoginState != FtpLoginState.NotLoggedIn))
{
this.m_LoginState = FtpLoginState.ReloginFailed;
throw ExceptionHelper.IsolatedException;
}
}
if (response.TransientFailure || response.PermanentFailure)
{
if (status == FtpStatusCode.ServiceNotAvailable)
{
base.MarkAsRecoverableFailure();
}
throw base.GenerateException(status, response.StatusDescription, null);
}
if ((this.m_LoginState != FtpLoginState.LoggedIn) && (entry.Command.IndexOf("PASS") != -1))
{
switch (status)
{
case FtpStatusCode.NeedLoginAccount:
case FtpStatusCode.LoggedInProceed:
this.m_LoginState = FtpLoginState.LoggedIn;
goto Label_017A;
}
throw base.GenerateException(status, response.StatusDescription, null);
}
Label_017A:
if (entry.HasFlag(CommandStream.PipelineEntryFlags.CreateDataConnection) && (response.PositiveCompletion || response.PositiveIntermediate))
{
bool flag;
CommandStream.PipelineInstruction instruction = this.QueueOrCreateDataConection(entry, response, timeout, ref stream, out flag);
if (!flag)
{
return(instruction);
}
}
switch (status)
{
case FtpStatusCode.OpeningData:
case FtpStatusCode.DataAlreadyOpen:
{
if (this.m_DataSocket == null)
{
return(CommandStream.PipelineInstruction.Abort);
}
if (!entry.HasFlag(CommandStream.PipelineEntryFlags.GiveDataStream))
{
base.m_AbortReason = SR.GetString("net_ftp_invalid_status_response", new object[] { status, entry.Command });
return(CommandStream.PipelineInstruction.Abort);
}
this.TryUpdateContentLength(response.StatusDescription);
FtpWebRequest request = (FtpWebRequest)base.m_Request;
if (request.MethodInfo.ShouldParseForResponseUri)
{
this.TryUpdateResponseUri(response.StatusDescription, request);
}
return(this.QueueOrCreateFtpDataStream(ref stream));
}
case FtpStatusCode.LoggedInProceed:
this.m_WelcomeMessage.Append(this.StatusLine);
break;
case FtpStatusCode.ClosingControl:
this.m_ExitMessage.Append(response.StatusDescription);
base.CloseSocket();
break;
case FtpStatusCode.ServerWantsSecureSession:
{
FtpWebRequest initiatingRequest = (FtpWebRequest)base.m_Request;
TlsStream stream2 = new TlsStream(initiatingRequest.RequestUri.Host, base.NetworkStream, initiatingRequest.ClientCertificates, base.Pool.ServicePoint, initiatingRequest, base.m_Async ? initiatingRequest.GetWritingContext().ContextCopy : null);
base.NetworkStream = stream2;
break;
}
case FtpStatusCode.FileStatus:
{
FtpWebRequest request1 = (FtpWebRequest)base.m_Request;
if (entry.Command.StartsWith("SIZE "))
{
this.m_ContentLength = this.GetContentLengthFrom213Response(response.StatusDescription);
}
else if (entry.Command.StartsWith("MDTM "))
{
this.m_LastModified = this.GetLastModifiedFrom213Response(response.StatusDescription);
}
break;
}
default:
if (status == FtpStatusCode.PathnameCreated)
{
if ((entry.Command == "PWD\r\n") && !entry.HasFlag(CommandStream.PipelineEntryFlags.UserCommand))
{
this.m_LoginDirectory = this.GetLoginDirectory(response.StatusDescription);
}
}
else if (entry.Command.IndexOf("CWD") != -1)
{
this.m_EstablishedServerDirectory = this.m_RequestedServerDirectory;
}
break;
}
if (!response.PositiveIntermediate && (base.UsingSecureStream || !(entry.Command == "AUTH TLS\r\n")))
{
return(CommandStream.PipelineInstruction.Advance);
}
return(CommandStream.PipelineInstruction.Reread);
}
//
// This is called by underlying base class code, each time a new response is received from the wire or a protocol stage is resumed.
// This function controls the seting up of a data socket/connection, and of saving off the server responses
//
protected override PipelineInstruction PipelineCallback(PipelineEntry entry, ResponseDescription response, bool timeout, ref Stream stream)
{
GlobalLog.Print("FtpControlStream#" + ValidationHelper.HashString(this) + ">" + (entry == null? "null" : entry.Command));
GlobalLog.Print("FtpControlStream#" + ValidationHelper.HashString(this) + ">" + ((response == null) ? "null" : response.StatusDescription));
// null response is not expected
if (response == null)
return PipelineInstruction.Abort;
FtpStatusCode status = (FtpStatusCode) response.Status;
//
// Update global "current status" for FtpWebRequest
//
if (status != FtpStatusCode.ClosingControl)
{
// A 221 status won't be reflected on the user FTP response
// Anything else will (by design?)
StatusCode = status;
StatusLine = response.StatusDescription;
}
// If the status code is outside the range defined in RFC (1xx to 5xx) throw
if (response.InvalidStatusCode)
throw new WebException(SR.GetString(SR.net_InvalidStatusCode), WebExceptionStatus.ProtocolError);
// Update the banner message if any, this is a little hack because the "entry" param is null
if (m_Index == -1) {
if (status == FtpStatusCode.SendUserCommand)
{
m_BannerMessage = new StringBuilder();
m_BannerMessage.Append(StatusLine);
return PipelineInstruction.Advance;
}
else if (status == FtpStatusCode.ServiceTemporarilyNotAvailable)
{
return PipelineInstruction.Reread;
}
else
throw GenerateException(status,response.StatusDescription, null);
}
//
// Check for the result of our attempt to use UTF8
// Condsider: optimize this for speed (avoid string compare) as that is the only command that may fail
//
if (entry.Command == "OPTS utf8 on\r\n")
{
if (response.PositiveCompletion) {
Encoding = Encoding.UTF8;
} else {
Encoding = Encoding.Default;
}
return PipelineInstruction.Advance;
}
// If we are already logged in and the server returns 530 then
// the server does not support re-issuing a USER command,
// tear down the connection and start all over again
if (entry.Command.IndexOf("USER") != -1)
{
// The server may not require a password for this user, so bypass the password command
if (status == FtpStatusCode.LoggedInProceed)
{
m_LoginState = FtpLoginState.LoggedIn;
m_Index++;
}
// The server does not like re-login
// (We are logged in already but want to re-login under a different user)
else if (status == FtpStatusCode.NotLoggedIn &&
m_LoginState != FtpLoginState.NotLoggedIn)
{
m_LoginState = FtpLoginState.ReloginFailed;
throw ExceptionHelper.IsolatedException;
}
}
//
// Throw on an error with possible recovery option
//
if (response.TransientFailure || response.PermanentFailure) {
if (status == FtpStatusCode.ServiceNotAvailable) {
MarkAsRecoverableFailure();
}
throw GenerateException(status,response.StatusDescription, null);
}
if (m_LoginState != FtpLoginState.LoggedIn
&& entry.Command.IndexOf("PASS") != -1)
{
// Note the fact that we logged in
if (status == FtpStatusCode.NeedLoginAccount || status == FtpStatusCode.LoggedInProceed)
m_LoginState = FtpLoginState.LoggedIn;
else
throw GenerateException(status,response.StatusDescription, null);
}
//
// Parse special cases
//
if (entry.HasFlag(PipelineEntryFlags.CreateDataConnection) && (response.PositiveCompletion || response.PositiveIntermediate))
{
bool isSocketReady;
PipelineInstruction result = QueueOrCreateDataConection(entry, response, timeout, ref stream, out isSocketReady);
if (!isSocketReady)
return result;
// otheriwse we have a stream to create
}
//
// This is part of the above case and it's all about giving data stream back
//
if (status == FtpStatusCode.OpeningData || status == FtpStatusCode.DataAlreadyOpen)
{
if (m_DataSocket == null)
{
// a better diagnostic?
return PipelineInstruction.Abort;
}
if (!entry.HasFlag(PipelineEntryFlags.GiveDataStream))
{
m_AbortReason = SR.GetString(SR.net_ftp_invalid_status_response, status, entry.Command);
return PipelineInstruction.Abort;
}
// Parse out the Content length, if we can
TryUpdateContentLength(response.StatusDescription);
// Parse out the file name, when it is returned and use it for our ResponseUri
FtpWebRequest request = (FtpWebRequest) m_Request;
if (request.MethodInfo.ShouldParseForResponseUri)
{
TryUpdateResponseUri(response.StatusDescription, request);
}
return QueueOrCreateFtpDataStream(ref stream);
}
//
// Parse responses by status code exclusivelly
//
//Update welcome message
if (status == FtpStatusCode.LoggedInProceed)
{
m_WelcomeMessage.Append(StatusLine);
}
// OR set the user response ExitMessage
else if (status == FtpStatusCode.ClosingControl)
{
m_ExitMessage.Append(response.StatusDescription);
// And close the control stream socket on "QUIT"
CloseSocket();
}
#if !FEATURE_PAL
// OR set us up for SSL/TLS, after this we'll be writing securely
else if (status == FtpStatusCode.ServerWantsSecureSession)
{
FtpWebRequest request = (FtpWebRequest) m_Request;
TlsStream tlsStream = new TlsStream(request.RequestUri.Host, NetworkStream, request.ClientCertificates, Pool.ServicePoint, request, m_Async ? request.GetWritingContext().ContextCopy : null);
NetworkStream = tlsStream;
}
#endif // !FEATURE_PAL
// OR parse out the file size or file time, usually a result of sending SIZE/MDTM commands
else if (status == FtpStatusCode.FileStatus)
{
FtpWebRequest request = (FtpWebRequest) m_Request;
if (entry.Command.StartsWith("SIZE ")) {
m_ContentLength = GetContentLengthFrom213Response(response.StatusDescription);
} else if (entry.Command.StartsWith("MDTM ")) {
m_LastModified = GetLastModifiedFrom213Response(response.StatusDescription);
}
}
// OR parse out our login directory
else if (status == FtpStatusCode.PathnameCreated)
{
if (entry.Command == "PWD\r\n" && !entry.HasFlag(PipelineEntryFlags.UserCommand))
{
m_LoginDirectory = GetLoginDirectory(response.StatusDescription);
}
}
// Asserting we have some positive response
else
{
// We only use CWD to reset ourselves back to the login directory.
if (entry.Command.IndexOf("CWD") != -1)
{
m_EstablishedServerDirectory = m_RequestedServerDirectory;
}
}
// Intermediate responses require rereading
if (response.PositiveIntermediate || (!UsingSecureStream && entry.Command == "AUTH TLS\r\n"))
{
return PipelineInstruction.Reread;
}
return PipelineInstruction.Advance;
}
/// <summary>
/// <para>Creates an array of commands, that will be sent to the server</para>
/// </summary>
protected override PipelineEntry [] BuildCommandsList(WebRequest req) {
FtpWebRequest request = (FtpWebRequest) req;
GlobalLog.Print("FtpControlStream#" + ValidationHelper.HashString(this) + "BuildCommandsList");
m_ResponseUri = request.RequestUri;
ArrayList commandList = new ArrayList();
if ((m_LastRequestWasUnknownMethod && !request.MethodInfo.IsUnknownMethod)
|| Credentials == null
|| !Credentials.IsEqualTo(request.Credentials.GetCredential(request.RequestUri, "basic"))) {
m_PreviousServerPath = null;
m_NewServerPath = null;
m_LoginDirectory = null;
if (m_LoginState == FtpLoginState.LoggedIn)
m_LoginState = FtpLoginState.LoggedInButNeedsRelogin;
}
m_LastRequestWasUnknownMethod = request.MethodInfo.IsUnknownMethod;
if (request.EnableSsl && !UsingSecureStream) {
commandList.Add(new PipelineEntry(FormatFtpCommand("AUTH", "TLS")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PBSZ", "0")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PROT", "P")));
// According to RFC we need to re-authorize with USER/PASS after we re-authenticate.
if (m_LoginState == FtpLoginState.LoggedIn)
m_LoginState = FtpLoginState.LoggedInButNeedsRelogin;
}
if (m_LoginState != FtpLoginState.LoggedIn) {
Credentials = request.Credentials.GetCredential(request.RequestUri, "basic");
m_WelcomeMessage = new StringBuilder();
m_ExitMessage = new StringBuilder();
string domainUserName = string.Empty;
string password = string.Empty;
if (Credentials != null)
{
domainUserName = Credentials.InternalGetDomainUserName();
password = Credentials.InternalGetPassword();
}
if (domainUserName.Length == 0 && password.Length == 0)
{
domainUserName = "******";
password = "******";
}
commandList.Add(new PipelineEntry(FormatFtpCommand("USER", domainUserName)));
commandList.Add(new PipelineEntry(FormatFtpCommand("PASS", password), PipelineEntryFlags.DontLogParameter));
commandList.Add(new PipelineEntry(FormatFtpCommand("OPTS", "utf8 on")));
commandList.Add(new PipelineEntry(FormatFtpCommand("PWD", null)));
}
GetPathOption getPathOption = GetPathOption.Normal;
if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
getPathOption = GetPathOption.AssumeNoFilename;
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.ParameterIsDirectory))
{
getPathOption = GetPathOption.AssumeFilename;
}
string requestPath = null;
string requestFilename = null;
GetPathAndFilename(getPathOption, request.RequestUri, ref requestPath, ref requestFilename, ref m_IsRootPath);
if (requestFilename.Length == 0 && request.MethodInfo.HasFlag(FtpMethodFlags.TakesParameter))
throw new WebException(SR.GetString(SR.net_ftp_invalid_uri));
string newServerPath = requestPath;
if (m_PreviousServerPath != newServerPath) {
if (!m_IsRootPath
&& m_LoginState == FtpLoginState.LoggedIn
&& m_LoginDirectory != null)
{
newServerPath = m_LoginDirectory+newServerPath;
}
m_NewServerPath = newServerPath;
commandList.Add(new PipelineEntry(FormatFtpCommand("CWD", newServerPath), PipelineEntryFlags.UserCommand));
}
if (request.CacheProtocol != null && request.CacheProtocol.ProtocolStatus == CacheValidationStatus.DoNotTakeFromCache && request.MethodInfo.Operation == FtpOperation.DownloadFile)
commandList.Add(new PipelineEntry(FormatFtpCommand("MDTM", requestFilename)));
if (!request.MethodInfo.IsCommandOnly)
{
// This is why having a protocol logic on the connection is a bad idea
if (request.CacheProtocol == null || request.CacheProtocol.ProtocolStatus != CacheValidationStatus.Continue)
{
if (request.UseBinary) {
commandList.Add(new PipelineEntry(FormatFtpCommand("TYPE", "I")));
} else {
commandList.Add(new PipelineEntry(FormatFtpCommand("TYPE", "A")));
}
if (request.UsePassive) {
string passiveCommand = (ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PASV" : "EPSV";
commandList.Add(new PipelineEntry(FormatFtpCommand(passiveCommand, null), PipelineEntryFlags.CreateDataConnection));
} else {
string portCommand = (ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PORT" : "EPRT";
CreateFtpListenerSocket(request);
commandList.Add(new PipelineEntry(FormatFtpCommand(portCommand, GetPortCommandLine(request))));
}
if (request.CacheProtocol != null && request.CacheProtocol.ProtocolStatus == CacheValidationStatus.CombineCachedAndServerResponse)
{
// Combining partial cache with the reminder using "REST"
if (request.CacheProtocol.Validator.CacheEntry.StreamSize > 0)
commandList.Add(new PipelineEntry(FormatFtpCommand("REST", request.CacheProtocol.Validator.CacheEntry.StreamSize.ToString(CultureInfo.InvariantCulture))));
}
else if (request.ContentOffset > 0) {
// REST command must always be the last sent before the main file command is sent.
commandList.Add(new PipelineEntry(FormatFtpCommand("REST", request.ContentOffset.ToString(CultureInfo.InvariantCulture))));
}
}
else
{
// revalidating GetFileSize = "SIZE" GetDateTimeStamp = "MDTM"
commandList.Add(new PipelineEntry(FormatFtpCommand("SIZE", requestFilename)));
commandList.Add(new PipelineEntry(FormatFtpCommand("MDTM", requestFilename)));
}
}
//
// Suppress the data file if this is a revalidation request
//
if (request.CacheProtocol == null || request.CacheProtocol.ProtocolStatus != CacheValidationStatus.Continue)
{
PipelineEntryFlags flags = PipelineEntryFlags.UserCommand;
if (!request.MethodInfo.IsCommandOnly)
{
flags |= PipelineEntryFlags.GiveDataStream;
if (!request.UsePassive)
flags |= PipelineEntryFlags.CreateDataConnection;
}
if (request.MethodInfo.Operation == FtpOperation.Rename)
{
commandList.Add(new PipelineEntry(FormatFtpCommand("RNFR", requestFilename), flags));
commandList.Add(new PipelineEntry(FormatFtpCommand("RNTO", request.RenameTo), flags));
} else {
commandList.Add(new PipelineEntry(FormatFtpCommand(request.Method, requestFilename), flags));
}
if (!request.KeepAlive) {
commandList.Add(new PipelineEntry(FormatFtpCommand("QUIT", null)));
}
}
return (PipelineEntry []) commandList.ToArray(typeof(PipelineEntry));
}
//
// This is called by underlying base class code, each time a new response is received from the wire or a protocol stage is resumed.
// This function controls the seting up of a data socket/connection, and of saving off the server responses
//
protected override PipelineInstruction PipelineCallback(PipelineEntry entry, ResponseDescription response, bool timeout, ref Stream stream)
{
GlobalLog.Print("FtpControlStream#" + ValidationHelper.HashString(this) + ">" + (entry == null? "null" : entry.Command));
GlobalLog.Print("FtpControlStream#" + ValidationHelper.HashString(this) + ">" + ((response == null) ? "null" : response.StatusDescription));
// null response is not expected
if (response == null)
return PipelineInstruction.Abort;
FtpStatusCode status = (FtpStatusCode) response.Status;
//
// Update global "current status" for FtpWebRequest
//
if (status != FtpStatusCode.ClosingControl)
{
// A 221 status won't be reflected on the user FTP response
// Anything else will (by design?)
StatusCode = status;
StatusLine = response.StatusDescription;
}
// If the status code is outside the range defined in RFC (1xx to 5xx) throw
if (response.InvalidStatusCode)
throw new WebException(SR.GetString(SR.net_InvalidStatusCode), WebExceptionStatus.ProtocolError);
if (m_Index == -1) {
if (status == FtpStatusCode.SendUserCommand)
{
m_BannerMessage = new StringBuilder();
m_BannerMessage.Append(StatusLine);
return PipelineInstruction.Advance;
}
else if (status == FtpStatusCode.ServiceTemporarilyNotAvailable)
{
return PipelineInstruction.Reread;
}
else
throw GenerateException(status,response.StatusDescription, null);
}
//
// Check for the result of our attempt to use UTF8
// Condsider: optimize this for speed (avoid string compare) as that is the only command that may fail
//
if (entry.Command == "OPTS utf8 on\r\n")
{
if (response.PositiveCompletion) {
Encoding = Encoding.UTF8;
} else {
Encoding = Encoding.Default;
}
return PipelineInstruction.Advance;
}
// If we are already logged in and the server returns 530 then
// the server does not support re-issuing a USER command,
// tear down the connection and start all over again
if (entry.Command.IndexOf("USER") != -1)
{
// The server may not require a password for this user, so bypass the password command
if (status == FtpStatusCode.LoggedInProceed)
{
m_LoginState = FtpLoginState.LoggedIn;
m_Index++;
}
// The server does not like re-login
// (We are logged in already but want to re-login under a different user)
else if (status == FtpStatusCode.NotLoggedIn &&
m_LoginState != FtpLoginState.NotLoggedIn)
{
m_LoginState = FtpLoginState.ReloginFailed;
throw ExceptionHelper.IsolatedException;
}
}
//
// Throw on an error with possibe recovery option
//
if (response.TransientFailure || response.PermanentFailure) {
if (status == FtpStatusCode.ServiceNotAvailable) {
MarkAsRecoverableFailure();
}
throw GenerateException(status,response.StatusDescription, null);
}
if (m_LoginState != FtpLoginState.LoggedIn
&& entry.Command.IndexOf("PASS") != -1)
{
// Note the fact that we logged in
if (status == FtpStatusCode.NeedLoginAccount || status == FtpStatusCode.LoggedInProceed)
m_LoginState = FtpLoginState.LoggedIn;
else
throw GenerateException(status,response.StatusDescription, null);
}
//
// Parse special cases
//
if (entry.HasFlag(PipelineEntryFlags.CreateDataConnection) && (response.PositiveCompletion || response.PositiveIntermediate))
{
bool isSocketReady;
PipelineInstruction result = QueueOrCreateDataConection(entry, response, timeout, ref stream, out isSocketReady);
if (!isSocketReady)
return result;
// otheriwse we have a stream to create
}
//
// This is part of the above case and it's all about giving data stream back
//
if (status == FtpStatusCode.OpeningData || status == FtpStatusCode.DataAlreadyOpen)
{
if (m_DataSocket == null)
{
// a better diagnostic?
return PipelineInstruction.Abort;
}
if (!entry.HasFlag(PipelineEntryFlags.GiveDataStream))
{
m_AbortReason = SR.GetString(SR.net_ftp_invalid_status_response, status, entry.Command);
return PipelineInstruction.Abort;
}
// Parse out the Content length, if we can
TryUpdateContentLength(response.StatusDescription);
// Parse out the file name, when it is returned and use it for our ResponseUri
if (status == FtpStatusCode.OpeningData)
{
FtpWebRequest request = (FtpWebRequest) m_Request;
if (request.MethodInfo.ShouldParseForResponseUri)
{
TryUpdateResponseUri(response.StatusDescription, request);
}
}
return QueueOrCreateFtpDataStream(ref stream);
}
//
// Parse responses by status code exclusivelly
//
//Update our command list if we have an alias
if (status == FtpStatusCode.LoggedInProceed)
{
if(StatusLine.ToLower(CultureInfo.InvariantCulture).IndexOf("alias") > 0){
//find start of alias
//skip first status code
int i = StatusLine.IndexOf("230-",3);
if(i > 0)
{
i+=4;
//eat white space
while(i<StatusLine.Length && StatusLine[i] == ' '){i++;}
//not eol
if (i <StatusLine.Length) {
//get end of alias
int j = StatusLine.IndexOf(' ',i);
if(j<0) j=StatusLine.Length;
m_Alias = StatusLine.Substring(i,j-i);
if (!m_IsRootPath) {
//update command list
for (i=0;i<m_Commands.Length;i++){
if(m_Commands[i].Command.IndexOf("CWD") == 0) {
string path = m_Alias+m_NewServerPath;
m_Commands[i] = new PipelineEntry(FormatFtpCommand("CWD", path));
break;
}
}
}
}
}
}
m_WelcomeMessage.Append(StatusLine);
}
// OR set the user response ExitMessage
else if (status == FtpStatusCode.ClosingControl)
{
m_ExitMessage.Append(response.StatusDescription);
// And close the control stream socket on "QUIT"
CloseSocket();
}
// OR parse out the file size or file time, usually a result of sending SIZE/MDTM commands
else if (status == FtpStatusCode.FileStatus)
{
FtpWebRequest request = (FtpWebRequest) m_Request;
if (entry.Command.StartsWith("SIZE ")) {
m_ContentLength = GetContentLengthFrom213Response(response.StatusDescription);
} else if (entry.Command.StartsWith("MDTM ")) {
m_LastModified = GetLastModifiedFrom213Response(response.StatusDescription);
}
}
// OR parse out our login directory
else if (status == FtpStatusCode.PathnameCreated)
{
if (entry.Command == "PWD\r\n" && !entry.HasFlag(PipelineEntryFlags.UserCommand))
{
m_LoginDirectory = GetLoginDirectory(response.StatusDescription);
if (!m_IsRootPath &&
m_LoginDirectory != "\\" &&
m_LoginDirectory != "/" &&
m_Alias == null)
{
//update command list
for (int i=0;i<m_Commands.Length;i++){
if(m_Commands[i].Command.IndexOf("CWD") == 0) {
string path = m_LoginDirectory+m_NewServerPath;
m_Commands[i] = new PipelineEntry(FormatFtpCommand("CWD", path));
break;
}
}
}
}
}
// Asserting we have some positive response
else
{
// OR update the current path (optimize this pls)
if (entry.Command.IndexOf("CWD") != -1)
{
m_PreviousServerPath = m_NewServerPath;
}
}
// Intermidate responses require rereading
if (response.PositiveIntermediate || (!UsingSecureStream && entry.Command == "AUTH TLS\r\n"))
{
return PipelineInstruction.Reread;
}
return PipelineInstruction.Advance;
}
protected override CommandStream.PipelineEntry[] BuildCommandsList(WebRequest req)
{
string str3;
string str4;
string str5;
bool flag = false;
FtpWebRequest request = (FtpWebRequest) req;
this.m_ResponseUri = request.RequestUri;
ArrayList list = new ArrayList();
if (request.EnableSsl && !base.UsingSecureStream)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("AUTH", "TLS")));
flag = true;
}
if (flag)
{
this.m_LoginDirectory = null;
this.m_EstablishedServerDirectory = null;
this.m_RequestedServerDirectory = null;
this.m_CurrentTypeSetting = string.Empty;
if (this.m_LoginState == FtpLoginState.LoggedIn)
{
this.m_LoginState = FtpLoginState.LoggedInButNeedsRelogin;
}
}
if (this.m_LoginState != FtpLoginState.LoggedIn)
{
this.Credentials = request.Credentials.GetCredential(request.RequestUri, "basic");
this.m_WelcomeMessage = new StringBuilder();
this.m_ExitMessage = new StringBuilder();
string parameter = string.Empty;
string password = string.Empty;
if (this.Credentials != null)
{
parameter = this.Credentials.InternalGetDomainUserName();
password = this.Credentials.InternalGetPassword();
}
if ((parameter.Length == 0) && (password.Length == 0))
{
parameter = "anonymous";
password = "******";
}
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("USER", parameter)));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("PASS", password), CommandStream.PipelineEntryFlags.DontLogParameter));
if (request.EnableSsl && !base.UsingSecureStream)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("PBSZ", "0")));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("PROT", "P")));
}
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("OPTS", "utf8 on")));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("PWD", null)));
}
GetPathOption normal = GetPathOption.Normal;
if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
normal = GetPathOption.AssumeNoFilename;
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.ParameterIsDirectory))
{
normal = GetPathOption.AssumeFilename;
}
GetPathInfo(normal, request.RequestUri, out str3, out str4, out str5);
if ((str5.Length == 0) && request.MethodInfo.HasFlag(FtpMethodFlags.TakesParameter))
{
throw new WebException(SR.GetString("net_ftp_invalid_uri"));
}
if (((this.m_EstablishedServerDirectory != null) && (this.m_LoginDirectory != null)) && (this.m_EstablishedServerDirectory != this.m_LoginDirectory))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("CWD", this.m_LoginDirectory), CommandStream.PipelineEntryFlags.UserCommand));
this.m_RequestedServerDirectory = this.m_LoginDirectory;
}
if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath) && (str4.Length > 0))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("CWD", str4), CommandStream.PipelineEntryFlags.UserCommand));
this.m_RequestedServerDirectory = str4;
}
if (((request.CacheProtocol != null) && (request.CacheProtocol.ProtocolStatus == CacheValidationStatus.DoNotTakeFromCache)) && (request.MethodInfo.Operation == FtpOperation.DownloadFile))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("MDTM", str3)));
}
if (!request.MethodInfo.IsCommandOnly)
{
if ((request.CacheProtocol == null) || (request.CacheProtocol.ProtocolStatus != CacheValidationStatus.Continue))
{
string str6 = request.UseBinary ? "I" : "A";
if (this.m_CurrentTypeSetting != str6)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("TYPE", str6)));
this.m_CurrentTypeSetting = str6;
}
if (request.UsePassive)
{
string command = (base.ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PASV" : "EPSV";
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(command, null), CommandStream.PipelineEntryFlags.CreateDataConnection));
}
else
{
string str8 = (base.ServerAddress.AddressFamily == AddressFamily.InterNetwork) ? "PORT" : "EPRT";
this.CreateFtpListenerSocket(request);
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(str8, this.GetPortCommandLine(request))));
}
if ((request.CacheProtocol != null) && (request.CacheProtocol.ProtocolStatus == CacheValidationStatus.CombineCachedAndServerResponse))
{
if (request.CacheProtocol.Validator.CacheEntry.StreamSize > 0L)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("REST", request.CacheProtocol.Validator.CacheEntry.StreamSize.ToString(CultureInfo.InvariantCulture))));
}
}
else if (request.ContentOffset > 0L)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("REST", request.ContentOffset.ToString(CultureInfo.InvariantCulture))));
}
}
else
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("SIZE", str3)));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("MDTM", str3)));
}
}
if ((request.CacheProtocol == null) || (request.CacheProtocol.ProtocolStatus != CacheValidationStatus.Continue))
{
CommandStream.PipelineEntryFlags userCommand = CommandStream.PipelineEntryFlags.UserCommand;
if (!request.MethodInfo.IsCommandOnly)
{
userCommand |= CommandStream.PipelineEntryFlags.GiveDataStream;
if (!request.UsePassive)
{
userCommand |= CommandStream.PipelineEntryFlags.CreateDataConnection;
}
}
if (request.MethodInfo.Operation == FtpOperation.Rename)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("RNFR", str4 + "/" + str5), userCommand));
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("RNTO", str4 + "/" + request.RenameTo), userCommand));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.DoesNotTakeParameter))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(request.Method, string.Empty), userCommand));
}
else if (request.MethodInfo.HasFlag(FtpMethodFlags.MustChangeWorkingDirectoryToPath))
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(request.Method, str5), userCommand));
}
else
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand(request.Method, str3), userCommand));
}
if (!request.KeepAlive)
{
list.Add(new CommandStream.PipelineEntry(this.FormatFtpCommand("QUIT", null)));
}
}
return (CommandStream.PipelineEntry[]) list.ToArray(typeof(CommandStream.PipelineEntry));
}
protected override CommandStream.PipelineInstruction PipelineCallback(CommandStream.PipelineEntry entry, ResponseDescription response, bool timeout, ref Stream stream)
{
if (response == null)
{
return CommandStream.PipelineInstruction.Abort;
}
FtpStatusCode status = (FtpStatusCode) response.Status;
if (status != FtpStatusCode.ClosingControl)
{
this.StatusCode = status;
this.StatusLine = response.StatusDescription;
}
if (response.InvalidStatusCode)
{
throw new WebException(SR.GetString("net_InvalidStatusCode"), WebExceptionStatus.ProtocolError);
}
if (base.m_Index == -1)
{
switch (status)
{
case FtpStatusCode.SendUserCommand:
this.m_BannerMessage = new StringBuilder();
this.m_BannerMessage.Append(this.StatusLine);
return CommandStream.PipelineInstruction.Advance;
case FtpStatusCode.ServiceTemporarilyNotAvailable:
return CommandStream.PipelineInstruction.Reread;
}
throw base.GenerateException(status, response.StatusDescription, null);
}
if (entry.Command == "OPTS utf8 on\r\n")
{
if (response.PositiveCompletion)
{
base.Encoding = Encoding.UTF8;
}
else
{
base.Encoding = Encoding.Default;
}
return CommandStream.PipelineInstruction.Advance;
}
if (entry.Command.IndexOf("USER") != -1)
{
if (status == FtpStatusCode.LoggedInProceed)
{
this.m_LoginState = FtpLoginState.LoggedIn;
base.m_Index++;
}
else if ((status == FtpStatusCode.NotLoggedIn) && (this.m_LoginState != FtpLoginState.NotLoggedIn))
{
this.m_LoginState = FtpLoginState.ReloginFailed;
throw ExceptionHelper.IsolatedException;
}
}
if (response.TransientFailure || response.PermanentFailure)
{
if (status == FtpStatusCode.ServiceNotAvailable)
{
base.MarkAsRecoverableFailure();
}
throw base.GenerateException(status, response.StatusDescription, null);
}
if ((this.m_LoginState != FtpLoginState.LoggedIn) && (entry.Command.IndexOf("PASS") != -1))
{
switch (status)
{
case FtpStatusCode.NeedLoginAccount:
case FtpStatusCode.LoggedInProceed:
this.m_LoginState = FtpLoginState.LoggedIn;
goto Label_017A;
}
throw base.GenerateException(status, response.StatusDescription, null);
}
Label_017A:
if (entry.HasFlag(CommandStream.PipelineEntryFlags.CreateDataConnection) && (response.PositiveCompletion || response.PositiveIntermediate))
{
bool flag;
CommandStream.PipelineInstruction instruction = this.QueueOrCreateDataConection(entry, response, timeout, ref stream, out flag);
if (!flag)
{
return instruction;
}
}
switch (status)
{
case FtpStatusCode.OpeningData:
case FtpStatusCode.DataAlreadyOpen:
{
if (this.m_DataSocket == null)
{
return CommandStream.PipelineInstruction.Abort;
}
if (!entry.HasFlag(CommandStream.PipelineEntryFlags.GiveDataStream))
{
base.m_AbortReason = SR.GetString("net_ftp_invalid_status_response", new object[] { status, entry.Command });
return CommandStream.PipelineInstruction.Abort;
}
this.TryUpdateContentLength(response.StatusDescription);
FtpWebRequest request = (FtpWebRequest) base.m_Request;
if (request.MethodInfo.ShouldParseForResponseUri)
{
this.TryUpdateResponseUri(response.StatusDescription, request);
}
return this.QueueOrCreateFtpDataStream(ref stream);
}
case FtpStatusCode.LoggedInProceed:
this.m_WelcomeMessage.Append(this.StatusLine);
break;
case FtpStatusCode.ClosingControl:
this.m_ExitMessage.Append(response.StatusDescription);
base.CloseSocket();
break;
case FtpStatusCode.ServerWantsSecureSession:
{
FtpWebRequest initiatingRequest = (FtpWebRequest) base.m_Request;
TlsStream stream2 = new TlsStream(initiatingRequest.RequestUri.Host, base.NetworkStream, initiatingRequest.ClientCertificates, base.Pool.ServicePoint, initiatingRequest, base.m_Async ? initiatingRequest.GetWritingContext().ContextCopy : null);
base.NetworkStream = stream2;
break;
}
case FtpStatusCode.FileStatus:
{
FtpWebRequest request1 = (FtpWebRequest) base.m_Request;
if (entry.Command.StartsWith("SIZE "))
{
this.m_ContentLength = this.GetContentLengthFrom213Response(response.StatusDescription);
}
else if (entry.Command.StartsWith("MDTM "))
{
this.m_LastModified = this.GetLastModifiedFrom213Response(response.StatusDescription);
}
break;
}
default:
if (status == FtpStatusCode.PathnameCreated)
{
if ((entry.Command == "PWD\r\n") && !entry.HasFlag(CommandStream.PipelineEntryFlags.UserCommand))
{
this.m_LoginDirectory = this.GetLoginDirectory(response.StatusDescription);
}
}
else if (entry.Command.IndexOf("CWD") != -1)
{
this.m_EstablishedServerDirectory = this.m_RequestedServerDirectory;
}
break;
}
if (!response.PositiveIntermediate && (base.UsingSecureStream || !(entry.Command == "AUTH TLS\r\n")))
{
return CommandStream.PipelineInstruction.Advance;
}
return CommandStream.PipelineInstruction.Reread;
}
