C++ (Cpp) MCFServerCon::downloadRange Examples

Example #1

File: MCF_Save.cpp Project: Alasaad/Desurium

void MCF::dlHeaderFromWeb()
{
	if (m_bStopped)
		return;

	if (m_vProviderList.size() == 0)
		throw gcException(ERR_ZEROFILE);

	gcException lastE;
	bool successful = false;

	OutBuffer out(MCF_HEADERSIZE_V2);
	MCFCore::Misc::MCFServerCon msc;

	for (size_t x=0; x<m_vProviderList.size(); x++)
	{
		try
		{
			msc.disconnect();
			msc.connect(m_vProviderList[x]->getUrl(), m_pFileAuth);

			msc.downloadRange(0, 5, &out); //4 id bytes and 1 version byte

			if (out.m_uiTotalSize != 5)
				throw gcException(ERR_BADHEADER, "Did not get any data from mcf server.");

			const char* data = out.m_szBuffer;

			if ( !(data[0] == 'L' && data[1] == 'M' && data[2] == 'C' && data[3] == 'F') )
				throw gcException(ERR_BADHEADER, "Failed magic check.");

			size_t headerSize = MCF_HEADERSIZE_V1;

			if (data[4] == 0x01)
				headerSize = MCF_HEADERSIZE_V1;
			else if (data[4] == 0x02)
				headerSize = MCF_HEADERSIZE_V2;
			else
				throw gcException(ERR_BADHEADER, "Bad version number");

			out.reset();
			msc.downloadRange(0, headerSize, &out);

			if (out.m_uiTotalSize != headerSize)
				throw gcException(ERR_BADHEADER, "Did not get correct ammount of data from server.");

			MCFCore::MCFHeader webHeader((uint8*)out.m_szBuffer);

			if (!webHeader.isValid())
				throw gcException(ERR_BADHEADER, "Mcf header was not valid.");

			uint32 ths = webHeader.getXmlSize();
			out = ths;

			msc.downloadRange(webHeader.getXmlStart(), webHeader.getXmlSize(), &out);

			if (out.m_uiTotalSize == 0 || out.m_uiTotalSize != webHeader.getXmlSize())
				throw gcException(ERR_WEBDL_FAILED, "Failed to download MCF xml from web (size is ether zero or didnt match header size)");

			data = out.m_szBuffer;

			if (data[0] == 'L' && data[1] == 'M' && data[2] == 'C' && data[3] == 'F')
				throw gcException(ERR_WEBDL_FAILED, "Server failed 4gb seek.");

			setHeader(&webHeader);
			successful = true;
			break;

		}
		catch (gcException &e)
		{
			lastE = e;
			Warning(gcString("Failed to download MCF Header from {1}: {0}\n", e, m_vProviderList[x]->getUrl()));
		}
	}

	if (!successful)
		throw lastE;

	uint32 bz2BuffLen = getHeader()->getXmlSize()*25;
	char* bz2Buff = NULL;

	if ( isCompressed() )
	{
		bz2Buff = new char[bz2BuffLen];
		UTIL::STRING::zeroBuffer(bz2Buff, bz2BuffLen);

		try
		{
			UTIL::BZIP::BZ2DBuff((char*)bz2Buff, &bz2BuffLen, out.m_szBuffer, out.m_uiTotalSize);
			parseXml(bz2Buff, bz2BuffLen);
			safe_delete(bz2Buff);
		}
		catch (gcException &)
		{
			safe_delete(bz2Buff);
			throw;
		}
	}
	else
	{
		parseXml(out.m_szBuffer, out.m_uiTotalSize);
	}

	//we remove the complete flag due to the files not existing in the MCF
	for (size_t x=0; x< m_pFileList.size(); x++)
	{
		m_pFileList[x]->delFlag(MCFCore::MCFFileI::FLAG_COMPLETE);
	}

	if (m_szFile != "")
		saveMCF_Header();
}

Example #2

File: MCF_Save.cpp Project: aromis/desura-app

void MCF::doDlHeaderFromWeb(MCFCore::Misc::MCFServerCon &msc)
{
	gcException lastE;
	bool successful = false;

	OutBuffer out(MCF_HEADERSIZE_V2);

	std::vector<std::shared_ptr<const MCFCore::Misc::DownloadProvider>> vProviders;
	m_pDownloadProviders->getDownloadProviders(vProviders);

	if (vProviders.empty())
		throw gcException(ERR_ZEROFILE);

	auto auth = m_pDownloadProviders->getDownloadAuth();

	for (auto provider : vProviders)
	{
		if (m_bStopped)
			return;

		try
		{
			msc.disconnect();
			msc.connect(*provider, *auth);

			msc.downloadRange(0, 5, &out); //4 id bytes and 1 version byte

			if (out.m_uiTotalSize != 5)
				throw gcException(ERR_BADHEADER, "Did not get any data from mcf server.");

			const char* data = out.m_szBuffer;

			if ( !(data[0] == 'L' && data[1] == 'M' && data[2] == 'C' && data[3] == 'F') )
				throw gcException(ERR_BADHEADER, "Failed magic check.");

			size_t headerSize = MCF_HEADERSIZE_V1;

			if (data[4] == 0x01)
				headerSize = MCF_HEADERSIZE_V1;
			else if (data[4] == 0x02)
				headerSize = MCF_HEADERSIZE_V2;
			else
				throw gcException(ERR_BADHEADER, "Bad version number");

			if (m_bStopped)
				return;

			out.reset();
			msc.downloadRange(0, headerSize, &out);

			if (out.m_uiTotalSize != headerSize)
				throw gcException(ERR_BADHEADER, "Did not get correct amount of data from server.");

			MCFCore::MCFHeader webHeader(out.m_szBuffer);

			if (!webHeader.isValid())
				throw gcException(ERR_BADHEADER, "Mcf header was not valid.");

			uint32 ths = webHeader.getXmlSize();
			out = ths;

			if (m_bStopped)
				return;

			msc.downloadRange(webHeader.getXmlStart(), webHeader.getXmlSize(), &out);

			if (out.m_uiTotalSize == 0 || out.m_uiTotalSize != webHeader.getXmlSize())
				throw gcException(ERR_WEBDL_FAILED, "Failed to download MCF xml from web (size is ether zero or didnt match header size)");

			data = out.m_szBuffer;

			if (data[0] == 'L' && data[1] == 'M' && data[2] == 'C' && data[3] == 'F')
				throw gcException(ERR_WEBDL_FAILED, "Server failed 4gb seek.");

			setHeader(&webHeader);
			successful = true;
			break;

		}
		catch (gcException &e)
		{
			lastE = e;

			auto bIsUserCancel = (e.getErrId() == ERR_MCFSERVER && e.getSecErrId() == ERR_USERCANCELED);

			if (!bIsUserCancel)
				Warning("Failed to download MCF Header from {1}: {0}\n", e, provider->getUrl());
		}
	}

	if (m_bStopped)
		return;

	if (!successful)
		throw lastE;

	uint32 bz2BuffLen = getHeader()->getXmlSize()*25;
	

	if ( isCompressed() )
	{
		char* bz2Buff = new char[bz2BuffLen];
		AutoDelete<char> ad(bz2Buff);

		UTIL::STRING::zeroBuffer(bz2Buff, bz2BuffLen);
		UTIL::BZIP::BZ2DBuff((char*)bz2Buff, &bz2BuffLen, out.m_szBuffer, out.m_uiTotalSize);
		parseXml(bz2Buff, bz2BuffLen);
	}
	else
	{
		parseXml(out.m_szBuffer, out.m_uiTotalSize);
	}

	//we remove the complete flag due to the files not existing in the MCF
	for (size_t x=0; x< m_pFileList.size(); x++)
	{
		m_pFileList[x]->delFlag(MCFCore::MCFFileI::FLAG_COMPLETE);
	}

	if (m_szFile != "")
		saveMCF_Header();
}