FileTransporter_curl.cpp

/*
 * (c) Copyright Ascensio System SIA 2010-2023
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation. In accordance with
 * Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
 * that Ascensio System SIA expressly excludes the warranty of non-infringement
 * of any third-party rights.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For
 * details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA at 20A-6 Ernesta Birznieka-Upish
 * street, Riga, Latvia, EU, LV-1050.
 *
 * The  interactive user interfaces in modified source and object code versions
 * of the Program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU AGPL version 3.
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 * All the Product's GUI elements, including illustrations and icon sets, as
 * well as technical writing content are licensed under the terms of the
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 * terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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 */

#include "FileTransporter_private.h"

#include <iostream>
#include <unistd.h>
#include "../../DesktopEditor/common/Directory.h"

#ifndef USE_EXTERNAL_TRANSPORT

#include <fcntl.h>
#include <curl/curl.h>
#include <curl/easy.h>
#include <stdio.h>

#else

#include "transport_external.h"

#endif

namespace NSNetwork
{
	namespace NSFileTransport
	{
		class CFileTransporterBaseCURL : public CFileTransporterBase
		{
		public :
			CFileTransporterBaseCURL(const std::wstring &sDownloadFileUrl, bool bDelete = true)
				: CFileTransporterBase(sDownloadFileUrl, bDelete)
			{
			}
			CFileTransporterBaseCURL(const std::wstring &sUploadUrl, const unsigned char* cData, const int nSize)
				: CFileTransporterBase(sUploadUrl, cData, nSize)
			{
			}
			CFileTransporterBaseCURL(const std::wstring &sUploadUrl, const std::wstring &sUploadFilePath)
				: CFileTransporterBase(sUploadUrl, sUploadFilePath)
			{

			}
			virtual ~CFileTransporterBaseCURL()
			{
				if (m_bDelete && !m_sDownloadFilePath.empty())
				{
					std::string sFilePath = U_TO_UTF8(m_sDownloadFilePath);
					unlink(sFilePath.c_str());
				}
			}

#ifndef USE_EXTERNAL_TRANSPORT
			static size_t write_data(void *ptr, size_t size, size_t nmemb, int fd) {
				size_t written = write(fd, ptr, size * nmemb);
				return written;
			}

			/*int progress_func(void* ptr, double TotalToDownload, double NowDownloaded, double TotalToUpload, double NowUploaded)
			{
				// It's here you will write the code for the progress message or bar
				int percent = static_cast<int>((100.0 * NowDownloaded) / TotalToDownload);

				if(CFileTransporterBase::m_func_onProgress)
					CFileTransporterBase::m_func_onProgress(percent);
				return 0;
			}
			*/


			static size_t write_data_to_string(char *contents, size_t size, size_t nmemb, void *userp)
			{
				((std::string*)userp)->append((char*)contents, size * nmemb);
				return size * nmemb;
			}

			virtual int DownloadFile() override
			{
				CURL *curl;
				int fp;
				CURLcode res;
				std::string sUrl = U_TO_UTF8(m_sDownloadFileUrl);
				std::string sOut;
				const char *url = sUrl.c_str();
				curl = curl_easy_init();
				if (curl)
				{
					fp = createUniqueTempFile(sOut);
					curl_easy_setopt(curl, CURLOPT_URL, url);
					curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
					curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
					//curl_easy_setopt(curl, CURLOPT_NOPROGRESS, FALSE);
					// Install the callback function
					//curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_func);
#if defined(__linux__)
					//в linux нет встроенных в систему корневых сертификатов, поэтому отключаем проверку
					//http://curl.haxx.se/docs/sslcerts.html
					curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
#endif
					/* tell libcurl to follow redirection(default false) */
					curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
					/* some servers don't like requests that are made without a user-agent field, so we provide one */
					curl_easy_setopt(curl, CURLOPT_USERAGENT, "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0");
					res = curl_easy_perform(curl);
					/* always cleanup */
					curl_easy_cleanup(curl);
					close(fp);
				}

				m_bComplete = (CURLE_OK == res);
				if (m_bComplete)
				{
					if (m_sDownloadFilePath.empty())
						m_sDownloadFilePath = NSFile::CUtf8Converter::GetUnicodeStringFromUTF8((BYTE*)sOut.c_str(), sOut.length());
					else
						NSFile::CFileBinary::Move(UTF8_TO_U(sOut), m_sDownloadFilePath);
				}
				//int nRes = execl("/usr/bin/wget", stringWstingToUtf8String (m_sFileUrl).c_str(), "-P", stringWstingToUtf8String (m_sDownloadFilePath).c_str(), (char *)NULL);
				//m_bComplete = nRes >= 0;

				return m_bComplete ? 0 : 1;
			}

			virtual int UploadData() override
			{
				CURL *curl;
				CURLcode res;
				std::string sUrl = U_TO_UTF8(m_sUploadUrl);
				const char *url = sUrl.c_str();
				struct curl_slist *headerlist = NULL;
				std::string readBuffer;

				/* get a curl handle */
				curl = curl_easy_init();
				if(curl) {

					headerlist = curl_slist_append(headerlist, "Content-Type: application/octet-stream");

					curl_easy_setopt(curl, CURLOPT_POST, true);
					curl_easy_setopt(curl, CURLOPT_HEADER, true);
					curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
					/* First set the URL that is about to receive our POST. This URL can
					   just as well be a https:// URL if that is what should receive the
					   data. */
					curl_easy_setopt(curl, CURLOPT_URL, url);
					/* Now specify the POST data */
					/* size of the POST data */
					curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE_LARGE, m_nSize);
					/* binary data */
					curl_easy_setopt(curl, CURLOPT_POSTFIELDS, m_cData);

					curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data_to_string);
					curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);

#if defined(__linux__)
					//в linux нет встроенных в систему корневых сертификатов, поэтому отключаем проверку
					//http://curl.haxx.se/docs/sslcerts.html
					curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
#endif

					/* Perform the request, res will get the return code */
					res = curl_easy_perform(curl);

					long http_code = 0;
					curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);

					if (res == CURLE_OK)
					{
						if (http_code == 200 || http_code == 1223)
						{
							size_t startLenghtPos = readBuffer.find("Content-Length:") + sizeof("Content-Length:");
							size_t endLenghtPos = readBuffer.substr(startLenghtPos, readBuffer.length()).find("\r");
							std::string dataSize = readBuffer.substr(startLenghtPos, endLenghtPos);
							readBuffer = readBuffer.substr(readBuffer.length() - std::stoi(dataSize));
							NSFile::CUtf8Converter::GetUnicodeStringFromUTF8((BYTE*)readBuffer.c_str(), (LONG)readBuffer.length(), m_sResponse);
						}
						else
						{
							res = CURLE_HTTP_RETURNED_ERROR;
						}
					}

					/* always cleanup */
					curl_easy_cleanup(curl);
				}
				m_bComplete = (CURLE_OK == res);

				return m_bComplete ? 0 : 1;
			}

			virtual int UploadFile() override
			{
				//stub
				return -1;
			}

		protected:
			int createUniqueTempFile (std::string &filename)
			{
				std::string sTempPath = NSFile::CUtf8Converter::GetUtf8StringFromUnicode(NSDirectory::GetTempPath());
				sTempPath += "/fileXXXXXX";
				int fd = mkstemp(const_cast <char *> (sTempPath.c_str()));
				if (-1 != fd)
					filename = sTempPath;
				return fd;
			}
#else
			virtual int DownloadFile() override
			{
				if (m_sDownloadFilePath.empty())
				{
					m_sDownloadFilePath = NSFile::CFileBinary::CreateTempFileWithUniqueName(NSDirectory::GetTempPath(), L"DW");
					if (NSFile::CFileBinary::Exists(m_sDownloadFilePath))
						NSFile::CFileBinary::Remove(m_sDownloadFilePath);
				}
				return download_external(m_sDownloadFileUrl, m_sDownloadFilePath, m_func_onProgress, m_check_aborted);
			}
			virtual int UploadData() override
			{
				if (!m_sUploadUrl.empty() && m_cData != NULL && m_nSize != 0)
				{
					return uploaddata_external(m_sUploadUrl, m_cData, m_nSize);
				}
				return -1;
			}
			virtual int UploadFile() override
			{
				if (!m_sUploadUrl.empty() && !m_sUploadFilePath.empty())
				{
					return uploadfile_external(m_sUploadUrl, m_sUploadFilePath);
				}
				return -1;
			}

#endif
		};

		CFileTransporter_private::CFileTransporter_private(const std::wstring &sDownloadFileUrl, bool bDelete)
			: m_pInternal(new CFileTransporterBaseCURL(sDownloadFileUrl, bDelete))

		{
			m_pInternal->m_check_aborted = std::bind(&CBaseThread::isAborted, this);
		}

		CFileTransporter_private::CFileTransporter_private(const std::wstring &sUploadUrl, const unsigned char* cData, const int nSize)
			: m_pInternal(new CFileTransporterBaseCURL(sUploadUrl, cData, nSize))
		{
			m_pInternal->m_check_aborted = std::bind(&CBaseThread::isAborted, this);
		}

		CFileTransporter_private::CFileTransporter_private(const std::wstring &sUploadUrl, const std::wstring &sUploadFilePath)
			: m_pInternal(new CFileTransporterBaseCURL(sUploadUrl, sUploadFilePath))
		{
			m_pInternal->m_check_aborted = std::bind(&CBaseThread::isAborted, this);
		}
	}
}