pop3store.cpp

MIME解析的代码

					throw;
				}

				if (challenge)
					delete [] challenge;

				if (resp)
					delete [] resp;

				break;
			}
			default:

				cont = false;
				break;
			}
		}
	}

	throw exceptions::authentication_error
		("Could not authenticate using SASL: all mechanisms failed.");
}

#endif // VMIME_HAVE_SASL_SUPPORT


#if VMIME_HAVE_TLS_SUPPORT

void POP3Store::startTLS()
{
	try
	{
		sendRequest("STLS");

		string response;
		readResponse(response, false);

		if (getResponseCode(response) != RESPONSE_OK)
			throw exceptions::command_error("STLS", response);

		ref <tls::TLSSession> tlsSession =
			vmime::create <tls::TLSSession>(getCertificateVerifier());

		ref <tls::TLSSocket> tlsSocket =
			tlsSession->getSocket(m_socket);

		tlsSocket->handshake(m_timeoutHandler);

		m_socket = tlsSocket;

		m_secured = true;
		m_cntInfos = vmime::create <tls::TLSSecuredConnectionInfos>
			(m_cntInfos->getHost(), m_cntInfos->getPort(), tlsSession, tlsSocket);
	}
	catch (exceptions::command_error&)
	{
		// Non-fatal error
		throw;
	}
	catch (exception&)
	{
		// Fatal error
		internalDisconnect();
		throw;
	}
}

#endif // VMIME_HAVE_TLS_SUPPORT


bool POP3Store::isConnected() const
{
	return (m_socket && m_socket->isConnected() && m_authentified);
}


bool POP3Store::isSecuredConnection() const
{
	return m_secured;
}


ref <connectionInfos> POP3Store::getConnectionInfos() const
{
	return m_cntInfos;
}


void POP3Store::disconnect()
{
	if (!isConnected())
		throw exceptions::not_connected();

	internalDisconnect();
}


void POP3Store::internalDisconnect()
{
	for (std::list <POP3Folder*>::iterator it = m_folders.begin() ;
	     it != m_folders.end() ; ++it)
	{
		(*it)->onStoreDisconnected();
	}

	m_folders.clear();

	try
	{
		sendRequest("QUIT");
	}
	catch (exception&)
	{
		// Not important
	}

	m_socket->disconnect();
	m_socket = NULL;

	m_timeoutHandler = NULL;

	m_authentified = false;

	m_secured = false;
	m_cntInfos = NULL;
}


void POP3Store::noop()
{
	sendRequest("NOOP");

	string response;
	readResponse(response, false);

	if (!isSuccessResponse(response))
		throw exceptions::command_error("NOOP", response);
}


const std::vector <string> POP3Store::getCapabilities()
{
	sendRequest("CAPA");

	string response;
	readResponse(response, true);

	std::vector <string> res;

	if (isSuccessResponse(response))
	{
		stripFirstLine(response, response);

		std::istringstream iss(response);
		string line;

		while (std::getline(iss, line, '\n'))
			res.push_back(utility::stringUtils::trim(line));
	}

	return res;
}


bool POP3Store::isSuccessResponse(const string& buffer)
{
	return getResponseCode(buffer) == RESPONSE_OK;
}


bool POP3Store::stripFirstLine(const string& buffer, string& result, string* firstLine)
{
	const string::size_type end = buffer.find('\n');

	if (end != string::npos)
	{
		if (firstLine) *firstLine = buffer.substr(0, end);
		result = buffer.substr(end + 1);
		return (true);
	}
	else
	{
		result = buffer;
		return (false);
	}
}


int POP3Store::getResponseCode(const string& buffer)
{
	if (buffer.length() >= 2)
	{
		// +[space]
		if (buffer[0] == '+' &&
		    (buffer[1] == ' ' || buffer[1] == '\t'))
		{
			return RESPONSE_READY;
		}

		// +OK
		if (buffer.length() >= 3)
		{
			if (buffer[0] == '+' &&
			    (buffer[1] == 'O' || buffer[1] == 'o') &&
			    (buffer[2] == 'K' || buffer[1] == 'k'))
			{
				return RESPONSE_OK;
			}
		}
	}

	// -ERR or whatever
	return RESPONSE_ERR;
}


void POP3Store::stripResponseCode(const string& buffer, string& result)
{
	const string::size_type pos = buffer.find_first_of(" \t");

	if (pos != string::npos)
		result = buffer.substr(pos + 1);
	else
		result = buffer;
}


void POP3Store::sendRequest(const string& buffer, const bool end)
{
	if (end)
		m_socket->send(buffer + "\r\n");
	else
		m_socket->send(buffer);
}


void POP3Store::readResponse(string& buffer, const bool multiLine,
                             utility::progressListener* progress)
{
	bool foundTerminator = false;
	int current = 0, total = 0;

	if (progress)
		progress->start(total);

	if (m_timeoutHandler)
		m_timeoutHandler->resetTimeOut();

	buffer.clear();

	string::value_type last1 = '\0', last2 = '\0';

	for ( ; !foundTerminator ; )
	{
#if 0 // not supported
		// Check for possible cancellation
		if (progress && progress->cancel())
			throw exceptions::operation_cancelled();
#endif

		// Check whether the time-out delay is elapsed
		if (m_timeoutHandler && m_timeoutHandler->isTimeOut())
		{
			if (!m_timeoutHandler->handleTimeOut())
				throw exceptions::operation_timed_out();

			m_timeoutHandler->resetTimeOut();
		}

		// Receive data from the socket
		string receiveBuffer;
		m_socket->receive(receiveBuffer);

		if (receiveBuffer.empty())   // buffer is empty
		{
			platform::getHandler()->wait();
			continue;
		}

		// We have received data: reset the time-out counter
		if (m_timeoutHandler)
			m_timeoutHandler->resetTimeOut();

		// Check for transparent characters: '\n..' becomes '\n.'
		const string::value_type first = receiveBuffer[0];

		if (first == '.' && last2 == '\n' && last1 == '.')
		{
			receiveBuffer.erase(receiveBuffer.begin());
		}
		else if (receiveBuffer.length() >= 2 && first == '.' &&
		         receiveBuffer[1] == '.' && last1 == '\n')
		{
			receiveBuffer.erase(receiveBuffer.begin());
		}

		for (string::size_type trans ;
		     string::npos != (trans = receiveBuffer.find("\n..")) ; )
		{
			receiveBuffer.replace(trans, 3, "\n.");
		}

		last1 = receiveBuffer[receiveBuffer.length() - 1];
		last2 = static_cast <char>((receiveBuffer.length() >= 2) ? receiveBuffer[receiveBuffer.length() - 2] : 0);

		// Append the data to the response buffer
		buffer += receiveBuffer;
		current += receiveBuffer.length();

		// Check for terminator string (and strip it if present)
		foundTerminator = checkTerminator(buffer, multiLine);

		// Notify progress
		if (progress)
		{
			total = std::max(total, current);
			progress->progress(current, total);
		}

		// If there is an error (-ERR) when executing a command that
		// requires a multi-line response, the error response will
		// include only one line, so we stop waiting for a multi-line
		// terminator and check for a "normal" one.
		if (multiLine && !foundTerminator && buffer.length() >= 4 && buffer[0] == '-')
		{
			foundTerminator = checkTerminator(buffer, false);
		}
	}

	if (progress)
		progress->stop(total);
}


void POP3Store::readResponse(utility::outputStream& os,
	utility::progressListener* progress, const int predictedSize)
{
	int current = 0, total = predictedSize;

	string temp;
	bool codeDone = false;

	if (progress)
		progress->start(total);

	if (m_timeoutHandler)
		m_timeoutHandler->resetTimeOut();

	utility::inputStreamSocketAdapter sis(*m_socket);
	utility::stopSequenceFilteredInputStream <5> sfis1(sis, "\r\n.\r\n");
	utility::stopSequenceFilteredInputStream <3> sfis2(sfis1, "\n.\n");
	utility::dotFilteredInputStream dfis(sfis2);   // "\n.." --> "\n."

	utility::inputStream& is = dfis;

	while (!is.eof())
	{
#if 0 // not supported
		// Check for possible cancellation
		if (progress && progress->cancel())
			throw exceptions::operation_cancelled();
#endif

		// Check whether the time-out delay is elapsed
		if (m_timeoutHandler && m_timeoutHandler->isTimeOut())
		{
			if (!m_timeoutHandler->handleTimeOut())
				throw exceptions::operation_timed_out();
		}

		// Receive data from the socket
		utility::stream::value_type buffer[65536];
		const utility::stream::size_type read = is.read(buffer, sizeof(buffer));

		if (read == 0)   // buffer is empty
		{
			platform::getHandler()->wait();
			continue;
		}

		// We have received data: reset the time-out counter
		if (m_timeoutHandler)
			m_timeoutHandler->resetTimeOut();

		// If we don't have extracted the response code yet
		if (!codeDone)
		{
			temp += string(buffer, read);

			string firstLine;

			if (stripFirstLine(temp, temp, &firstLine) == true)
			{
				if (!isSuccessResponse(firstLine))
					throw exceptions::command_error("?", firstLine);

				codeDone = true;

				os.write(temp.data(), temp.length());
				temp.clear();

				continue;
			}
		}
		else
		{
			// Inject the data into the output stream
			os.write(buffer, read);
			current += read;

			// Notify progress
			if (progress)
			{
				total = std::max(total, current);
				progress->progress(current, total);
			}
		}
	}

	if (progress)
		progress->stop(total);
}


bool POP3Store::checkTerminator(string& buffer, const bool multiLine)
{
	// Multi-line response
	if (multiLine)
	{
		static const string term1("\r\n.\r\n");
		static const string term2("\n.\n");

		return (checkOneTerminator(buffer, term1) ||
		        checkOneTerminator(buffer, term2));
	}
	// Normal response
	else
	{
		static const string term1("\r\n");
		static const string term2("\n");

		return (checkOneTerminator(buffer, term1) ||
		        checkOneTerminator(buffer, term2));
	}

	return (false);
}


bool POP3Store::checkOneTerminator(string& buffer, const string& term)
{
	if (buffer.length() >= term.length() &&
		std::equal(buffer.end() - term.length(), buffer.end(), term.begin()))
	{
		buffer.erase(buffer.end() - term.length(), buffer.end());
		return (true);
	}

	return (false);
}


void POP3Store::registerFolder(POP3Folder* folder)
{
	m_folders.push_back(folder);
}


void POP3Store::unregisterFolder(POP3Folder* folder)
{
	std::list <POP3Folder*>::iterator it = std::find(m_folders.begin(), m_folders.end(), folder);
	if (it != m_folders.end()) m_folders.erase(it);
}


int POP3Store::getCapabilities() const
{
	return (CAPABILITY_DELETE_MESSAGE);
}



// Service infos

POP3ServiceInfos POP3Store::sm_infos(false);


const serviceInfos& POP3Store::getInfosInstance()
{
	return sm_infos;
}


const serviceInfos& POP3Store::getInfos() const
{
	return sm_infos;
}


} // pop3
} // net
} // vmime