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https://github.com/pocoproject/poco.git
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initial import
This commit is contained in:
Guenter Obiltschnig
507
Net/src/FTPClientSession.cpp
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507
Net/src/FTPClientSession.cpp
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//
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// FTPClientSession.cpp
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//
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// $Id: //poco/1.1.0/Net/src/FTPClientSession.cpp#2 $
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//
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// Library: Net
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// Package: FTP
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// Module: FTPClientSession
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//
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// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Net/FTPClientSession.h"
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#include "Net/SocketAddress.h"
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#include "Net/SocketStream.h"
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#include "Net/ServerSocket.h"
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#include "Net/NetException.h"
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#include "Foundation/NumberFormatter.h"
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#include <ctype.h>
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using Foundation::NumberFormatter;
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Net_BEGIN
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FTPClientSession::FTPClientSession(const StreamSocket& socket):
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_controlSocket(socket),
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_pDataStream(0),
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_passiveMode(true),
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_fileType(TYPE_BINARY),
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_supports1738(true),
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_isOpen(true),
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_timeout(DEFAULT_TIMEOUT)
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{
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_controlSocket.setReceiveTimeout(_timeout);
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}
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FTPClientSession::FTPClientSession(const std::string& host, Foundation::UInt16 port):
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_controlSocket(SocketAddress(host, port)),
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_pDataStream(0),
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_passiveMode(true),
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_fileType(TYPE_BINARY),
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_supports1738(true),
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_isOpen(true),
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_timeout(DEFAULT_TIMEOUT)
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{
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_controlSocket.setReceiveTimeout(_timeout);
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}
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FTPClientSession::~FTPClientSession()
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{
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try
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{
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close();
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}
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catch (...)
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{
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}
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}
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void FTPClientSession::setTimeout(const Foundation::Timespan& timeout)
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{
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_timeout = timeout;
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_controlSocket.setReceiveTimeout(timeout);
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}
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Foundation::Timespan FTPClientSession::getTimeout() const
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{
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return _timeout;
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}
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void FTPClientSession::setPassive(bool flag)
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{
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_passiveMode = flag;
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}
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bool FTPClientSession::getPassive() const
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{
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return _passiveMode;
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}
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void FTPClientSession::login(const std::string& username, const std::string& password)
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{
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std::string response;
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int status = _controlSocket.receiveStatusMessage(response);
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if (!isPositiveCompletion(status)) throw FTPException("Cannot login to server", response);
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status = sendCommand("USER", username, response);
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if (isPositiveIntermediate(status))
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status = sendCommand("PASS", password, response);
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if (!isPositiveCompletion(status)) throw FTPException("Login denied", response);
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setFileType(_fileType);
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}
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void FTPClientSession::close()
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{
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if (_isOpen)
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{
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try
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{
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endTransfer();
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}
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catch (...)
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{
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}
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std::string response;
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sendCommand("QUIT", response);
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_controlSocket.close();
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_isOpen = false;
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}
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}
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void FTPClientSession::setFileType(FTPClientSession::FileType type)
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{
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std::string response;
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int status = sendCommand("TYPE", (type == TYPE_TEXT ? "A" : "I"), response);
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if (!isPositiveCompletion(status)) throw FTPException("Cannot set file type", response);
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_fileType = type;
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}
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FTPClientSession::FileType FTPClientSession::getFileType() const
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{
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return _fileType;
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}
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std::string FTPClientSession::systemType()
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{
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std::string response;
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int status = sendCommand("SYST", response);
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if (isPositiveCompletion(status))
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return response.substr(4);
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else
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throw FTPException("Cannot get remote system type", response);
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}
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void FTPClientSession::setWorkingDirectory(const std::string& path)
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{
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std::string response;
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int status = sendCommand("CWD", path, response);
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if (!isPositiveCompletion(status)) throw FTPException("Cannot change directory", response);
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}
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std::string FTPClientSession::getWorkingDirectory()
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{
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std::string response;
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int status = sendCommand("PWD", response);
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if (isPositiveCompletion(status))
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return extractPath(response);
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else
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throw FTPException("Cannot get current working directory", response);
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}
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void FTPClientSession::cdup()
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{
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std::string response;
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int status = sendCommand("CDUP", response);
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if (!isPositiveCompletion(status)) throw FTPException("Cannot change directory", response);
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}
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void FTPClientSession::rename(const std::string& oldName, const std::string& newName)
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{
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std::string response;
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int status = sendCommand("RNFR", oldName, response);
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if (!isPositiveIntermediate(status)) throw FTPException(std::string("Cannot rename ") + oldName, response);
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status = sendCommand("RNTO", newName, response);
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if (!isPositiveCompletion(status)) throw FTPException(std::string("Cannot rename to ") + newName, response);
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}
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void FTPClientSession::remove(const std::string& path)
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{
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std::string response;
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int status = sendCommand("DELE", path, response);
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if (!isPositiveCompletion(status)) throw FTPException(std::string("Cannot remove " + path), response);
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}
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void FTPClientSession::createDirectory(const std::string& path)
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{
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std::string response;
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int status = sendCommand("MKD", path, response);
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if (!isPositiveCompletion(status)) throw FTPException(std::string("Cannot create directory ") + path, response);
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}
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void FTPClientSession::removeDirectory(const std::string& path)
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{
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std::string response;
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int status = sendCommand("RMD", path, response);
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if (!isPositiveCompletion(status)) throw FTPException(std::string("Cannot remove directory ") + path, response);
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}
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std::istream& FTPClientSession::beginDownload(const std::string& path)
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{
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delete _pDataStream;
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_pDataStream = 0;
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_pDataStream = new SocketStream(establishDataConnection("RETR", path));
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return *_pDataStream;
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}
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void FTPClientSession::endDownload()
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{
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endTransfer();
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}
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std::ostream& FTPClientSession::beginUpload(const std::string& path)
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{
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delete _pDataStream;
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_pDataStream = 0;
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_pDataStream = new SocketStream(establishDataConnection("STOR", path));
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return *_pDataStream;
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}
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void FTPClientSession::endUpload()
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{
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endTransfer();
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}
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std::istream& FTPClientSession::beginList(const std::string& path, bool extended)
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{
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delete _pDataStream;
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_pDataStream = 0;
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_pDataStream = new SocketStream(establishDataConnection(extended ? "LIST" : "NLST", path));
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return *_pDataStream;
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}
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void FTPClientSession::endList()
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{
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endTransfer();
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}
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void FTPClientSession::abort()
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{
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_controlSocket.sendByte(DialogSocket::TELNET_IP);
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_controlSocket.synch();
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std::string response;
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int status = sendCommand("ABOR", response);
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if (status == 426)
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status = _controlSocket.receiveStatusMessage(response);
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if (status != 226) throw FTPException("Cannot abort transfer", response);
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}
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int FTPClientSession::sendCommand(const std::string& command, std::string& response)
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{
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_controlSocket.sendMessage(command);
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return _controlSocket.receiveStatusMessage(response);
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}
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int FTPClientSession::sendCommand(const std::string& command, const std::string& arg, std::string& response)
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{
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_controlSocket.sendMessage(command, arg);
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return _controlSocket.receiveStatusMessage(response);
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}
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std::string FTPClientSession::extractPath(const std::string& response)
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{
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std::string path;
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std::string::const_iterator it = response.begin();
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std::string::const_iterator end = response.end();
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while (it != end && *it != '"') ++it;
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if (it != end)
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{
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++it;
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while (it != end)
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{
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if (*it == '"')
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{
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++it;
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if (it != end && *it != '"') break;
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}
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path += *it++;
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}
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}
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return path;
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}
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StreamSocket FTPClientSession::establishDataConnection(const std::string& command, const std::string& arg)
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{
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if (_passiveMode)
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return passiveDataConnection(command, arg);
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else
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return activeDataConnection(command, arg);
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}
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StreamSocket FTPClientSession::activeDataConnection(const std::string& command, const std::string& arg)
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{
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ServerSocket server(SocketAddress(_controlSocket.address().host(), 0));
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sendPortCommand(server.address());
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std::string response;
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int status = sendCommand(command, arg, response);
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if (!isPositivePreliminary(status)) throw FTPException(command + " command failed", response);
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if (server.poll(_timeout, Socket::SELECT_READ))
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return server.acceptConnection();
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else
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throw FTPException("The server has not initiated a data connection");
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}
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StreamSocket FTPClientSession::passiveDataConnection(const std::string& command, const std::string& arg)
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{
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SocketAddress sa(sendPassiveCommand());
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StreamSocket sock(sa);
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std::string response;
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int status = sendCommand(command, arg, response);
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if (!isPositivePreliminary(status)) throw FTPException(command + " command failed", response);
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return sock;
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}
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void FTPClientSession::sendPortCommand(const SocketAddress& addr)
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{
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if (_supports1738)
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{
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if (sendEPRT(addr))
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return;
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else
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_supports1738 = false;
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}
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sendPORT(addr);
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}
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SocketAddress FTPClientSession::sendPassiveCommand()
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{
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SocketAddress addr;
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if (_supports1738)
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{
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if (sendEPSV(addr))
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return addr;
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else
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_supports1738 = false;
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}
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sendPASV(addr);
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return addr;
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}
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bool FTPClientSession::sendEPRT(const SocketAddress& addr)
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{
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std::string arg("|");
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arg += addr.af() == AF_INET ? '1' : '2';
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arg += '|';
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arg += addr.host().toString();
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arg += '|';
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arg += NumberFormatter::format(addr.port());
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arg += '|';
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std::string response;
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int status = sendCommand("EPRT", arg, response);
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if (isPositiveCompletion(status))
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return true;
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else if (isPermanentNegative(status))
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return false;
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else
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throw FTPException("EPRT command failed", response);
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}
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void FTPClientSession::sendPORT(const SocketAddress& addr)
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{
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std::string arg(addr.host().toString());
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for (std::string::iterator it = arg.begin(); it != arg.end(); ++it)
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{
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if (*it == '.') *it = ',';
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}
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arg += ',';
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Foundation::UInt16 port = addr.port();
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arg += NumberFormatter::format(port/256);
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arg += ',';
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arg += NumberFormatter::format(port % 256);
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std::string response;
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int status = sendCommand("PORT", arg, response);
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if (!isPositiveCompletion(status)) throw FTPException("PORT command failed", response);
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}
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bool FTPClientSession::sendEPSV(SocketAddress& addr)
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{
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std::string response;
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int status = sendCommand("EPSV", response);
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if (isPositiveCompletion(status))
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{
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parseExtAddress(response, addr);
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return true;
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}
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else if (isPermanentNegative(status))
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{
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return false;
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}
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else throw FTPException("EPSV command failed", response);
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}
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void FTPClientSession::sendPASV(SocketAddress& addr)
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{
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std::string response;
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int status = sendCommand("PASV", response);
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if (!isPositiveCompletion(status)) throw FTPException("PASV command failed", response);
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parseAddress(response, addr);
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}
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void FTPClientSession::parseAddress(const std::string& str, SocketAddress& addr)
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{
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std::string::const_iterator it = str.begin();
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std::string::const_iterator end = str.end();
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while (it != end && *it != '(') ++it;
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if (it != end) ++it;
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std::string host;
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while (it != end && isdigit(*it)) host += *it++;
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if (it != end && *it == ',') { host += '.'; ++it; }
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while (it != end && isdigit(*it)) host += *it++;
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if (it != end && *it == ',') { host += '.'; ++it; }
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while (it != end && isdigit(*it)) host += *it++;
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if (it != end && *it == ',') { host += '.'; ++it; }
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while (it != end && isdigit(*it)) host += *it++;
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if (it != end && *it == ',') ++it;
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Foundation::UInt16 portHi = 0;
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while (it != end && isdigit(*it)) { portHi *= 10; portHi += *it++ - '0'; }
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if (it != end && *it == ',') ++it;
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Foundation::UInt16 portLo = 0;
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while (it != end && isdigit(*it)) { portLo *= 10; portLo += *it++ - '0'; }
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addr = SocketAddress(host, portHi*256 + portLo);
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}
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void FTPClientSession::parseExtAddress(const std::string& str, SocketAddress& addr)
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{
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std::string::const_iterator it = str.begin();
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std::string::const_iterator end = str.end();
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while (it != end && *it != '(') ++it;
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if (it != end) ++it;
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char delim = '|';
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if (it != end) delim = *it++;
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if (it != end && *it == delim) ++it;
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if (it != end && *it == delim) ++it;
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Foundation::UInt16 port = 0;
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while (it != end && isdigit(*it)) { port *= 10; port += *it++ - '0'; }
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addr = SocketAddress(_controlSocket.peerAddress().host(), port);
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}
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void FTPClientSession::endTransfer()
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{
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if (_pDataStream)
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{
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delete _pDataStream;
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_pDataStream = 0;
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std::string response;
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int status = _controlSocket.receiveStatusMessage(response);
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if (!isPositiveCompletion(status)) throw FTPException("Data transfer failed", response);
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}
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}
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Net_END
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