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; }