113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2013 Bolton Software Ltd.
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "synergy/FileChunker.h"
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#include "synergy/protocol_types.h"
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#include "base/EventTypes.h"
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#include "base/Event.h"
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#include "base/IEventQueue.h"
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#include "base/EventTypes.h"
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#include "base/Log.h"
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#include "base/Stopwatch.h"
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#include <fstream>
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#include <sstream>
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#include <stdexcept>
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#define PAUSE_TIME_HACK 0.1
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using namespace std;
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const size_t CFileChunker::m_chunkSize = 512 * 1024; // 512kb
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void
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CFileChunker::sendFileChunks(char* filename, IEventQueue* events, void* eventTarget)
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{
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std::fstream file(reinterpret_cast<char*>(filename), std::ios::in | std::ios::binary);
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if (!file.is_open()) {
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throw runtime_error("failed to open file");
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}
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// check file size
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file.seekg (0, std::ios::end);
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size_t size = (size_t)file.tellg();
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// send first message (file size)
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CString fileSize = intToString(size);
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size_t sizeLength = fileSize.size();
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CFileChunk* sizeMessage = new CFileChunk(sizeLength + 2);
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char* chunkData = sizeMessage->m_chunk;
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chunkData[0] = kFileStart;
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memcpy(&chunkData[1], fileSize.c_str(), sizeLength);
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chunkData[sizeLength + 1] = '\0';
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events->addEvent(CEvent(events->forIScreen().fileChunkSending(), eventTarget, sizeMessage));
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// send chunk messages with a fixed chunk size
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size_t sentLength = 0;
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size_t chunkSize = m_chunkSize;
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CStopwatch stopwatch;
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stopwatch.start();
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file.seekg (0, std::ios::beg);
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while (true) {
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if (stopwatch.getTime() > PAUSE_TIME_HACK) {
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// make sure we don't read too much from the mock data.
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if (sentLength + chunkSize > size) {
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chunkSize = size - sentLength;
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}
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// for fileChunk->m_chunk, the first byte is the chunk mark, last is \0
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CFileChunk* fileChunk = new CFileChunk(chunkSize + 2);
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char* chunkData = fileChunk->m_chunk;
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chunkData[0] = kFileChunk;
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file.read(&chunkData[1], chunkSize);
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chunkData[chunkSize + 1] = '\0';
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events->addEvent(CEvent(events->forIScreen().fileChunkSending(), eventTarget, fileChunk));
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sentLength += chunkSize;
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file.seekg (sentLength, std::ios::beg);
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if (sentLength == size) {
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break;
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}
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stopwatch.reset();
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}
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}
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// send last message
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CFileChunk* transferFinished = new CFileChunk(2);
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chunkData = transferFinished->m_chunk;
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chunkData[0] = kFileEnd;
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chunkData[1] = '\0';
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events->addEvent(CEvent(events->forIScreen().fileChunkSending(), eventTarget, transferFinished));
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file.close();
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}
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CString
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CFileChunker::intToString(size_t i)
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{
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stringstream ss;
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ss << i;
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return ss.str();
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}
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