src/TortoiseProc/UpdateDownloader.cpp

   1 // TortoiseGit - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2013-2017 - TortoiseGit
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 #include "stdafx.h"
  20 #include "UpdateDownloader.h"
  21 #include "../version.h"
  22
  23 CUpdateDownloader::CUpdateDownloader(HWND hwnd, bool force, UINT msg, CEvent *eventStop)
  24 : m_hWnd(hwnd)
  25 , m_bForce(force)
  26 , m_uiMsg(msg)
  27 , m_eventStop(eventStop)
  28 {
  29         OSVERSIONINFOEX inf = {0};
  30         BruteforceGetWindowsVersionNumber(inf);
  31
  32         m_sWindowsPlatform = (inf.dwPlatformId == VER_PLATFORM_WIN32_NT) ? L"NT" : L"";
  33         m_sWindowsVersion.Format(L"%ld.%ld", inf.dwMajorVersion, inf.dwMinorVersion);
  34         if (inf.wServicePackMajor)
  35                 m_sWindowsServicePack.Format(L"SP%ld", inf.wServicePackMajor);
  36
  37         CString userAgent;
  38         userAgent.Format(L"TortoiseGit %s; %s; Windows%s%s %s%s%s", _T(STRFILEVER), _T(TGIT_PLATFORM), m_sWindowsPlatform.IsEmpty() ? L"" : L" ", (LPCTSTR)m_sWindowsPlatform, (LPCTSTR)m_sWindowsVersion, m_sWindowsServicePack.IsEmpty() ? L"" : L" ", (LPCTSTR)m_sWindowsServicePack);
  39         hOpenHandle = InternetOpen(userAgent, INTERNET_OPEN_TYPE_PRECONFIG, nullptr, nullptr, 0);
  40 }
  41
  42 CUpdateDownloader::~CUpdateDownloader(void)
  43 {
  44         if (hOpenHandle)
  45                 InternetCloseHandle(hOpenHandle);
  46 }
  47
  48 void CUpdateDownloader::BruteforceGetWindowsVersionNumber(OSVERSIONINFOEX& osVersionInfo)
  49 {
  50         osVersionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
  51         osVersionInfo.dwMajorVersion = HIBYTE(_WIN32_WINNT_WIN7);
  52         osVersionInfo.dwMinorVersion = LOBYTE(_WIN32_WINNT_WIN7);
  53         osVersionInfo.dwPlatformId = VER_PLATFORM_WIN32_NT;
  54
  55         ULONGLONG maskConditioMajor = ::VerSetConditionMask(0, VER_MAJORVERSION, VER_LESS);
  56         ULONGLONG maskConditioMinor = ::VerSetConditionMask(0, VER_MINORVERSION, VER_LESS);
  57         ULONGLONG maskConditioSPMajor = ::VerSetConditionMask(0, VER_SERVICEPACKMAJOR, VER_LESS);
  58         while (!::VerifyVersionInfo(&osVersionInfo, VER_MAJORVERSION, maskConditioMajor))
  59         {
  60                 ++osVersionInfo.dwMajorVersion;
  61                 osVersionInfo.dwMinorVersion = 0;
  62                 osVersionInfo.wServicePackMajor = 0;
  63                 osVersionInfo.wServicePackMinor = 0;
  64         }
  65         while (!::VerifyVersionInfo(&osVersionInfo, VER_MINORVERSION, maskConditioMinor))
  66         {
  67                 ++osVersionInfo.dwMinorVersion;
  68                 osVersionInfo.wServicePackMajor = 0;
  69                 osVersionInfo.wServicePackMinor = 0;
  70         }
  71         while (!::VerifyVersionInfo(&osVersionInfo, VER_SERVICEPACKMAJOR, maskConditioSPMajor))
  72                 ++osVersionInfo.wServicePackMajor;
  73         // detection of VER_SERVICEPACKMINOR doesn't work reliably
  74 }
  75
  76 DWORD CUpdateDownloader::DownloadFile(const CString& url, const CString& dest, bool showProgress) const
  77 {
  78         CString hostname;
  79         CString urlpath;
  80         URL_COMPONENTS urlComponents = {0};
  81         urlComponents.dwStructSize = sizeof(urlComponents);
  82         urlComponents.lpszHostName = hostname.GetBufferSetLength(INTERNET_MAX_HOST_NAME_LENGTH);
  83         urlComponents.dwHostNameLength = INTERNET_MAX_HOST_NAME_LENGTH;
  84         urlComponents.lpszUrlPath = urlpath.GetBufferSetLength(INTERNET_MAX_PATH_LENGTH);
  85         urlComponents.dwUrlPathLength = INTERNET_MAX_PATH_LENGTH;
  86         if (!InternetCrackUrl(url, url.GetLength(), 0, &urlComponents))
  87                 return GetLastError();
  88         hostname.ReleaseBuffer();
  89         urlpath.ReleaseBuffer();
  90
  91         if (m_bForce)
  92                 DeleteUrlCacheEntry(url);
  93
  94         BOOL bTrue = TRUE;
  95         BOOL enableDecoding = InternetSetOption(hOpenHandle, INTERNET_OPTION_HTTP_DECODING, &bTrue, sizeof(bTrue));
  96
  97         bool isHttps = urlComponents.nScheme == INTERNET_SCHEME_HTTPS;
  98         HINTERNET hConnectHandle = InternetConnect(hOpenHandle, hostname, urlComponents.nPort, nullptr, nullptr, isHttps ? INTERNET_SCHEME_HTTP : urlComponents.nScheme, 0, 0);
  99         if (!hConnectHandle)
 100         {
 101                 DWORD err = GetLastError();
 102                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": Download of %s failed on InternetConnect: %d\n", (LPCTSTR)url, err);
 103                 return err;
 104         }
 105         SCOPE_EXIT{ InternetCloseHandle(hConnectHandle); };
 106         HINTERNET hResourceHandle = HttpOpenRequest(hConnectHandle, nullptr, urlpath, nullptr, nullptr, nullptr, INTERNET_FLAG_KEEP_CONNECTION | (isHttps ? INTERNET_FLAG_SECURE : 0) | (m_bForce ? INTERNET_FLAG_HYPERLINK : 0), 0);
 107         if (!hResourceHandle)
 108         {
 109                 DWORD err = GetLastError();
 110                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": Download of %s failed on HttpOpenRequest: %d\n", (LPCTSTR)url, err);
 111                 return err;
 112         }
 113         SCOPE_EXIT{ InternetCloseHandle(hResourceHandle); };
 114
 115         if (enableDecoding)
 116                 HttpAddRequestHeaders(hResourceHandle, L"Accept-Encoding: gzip, deflate\r\n", (DWORD)-1, HTTP_ADDREQ_FLAG_ADD);
 117
 118         {
 119 resend:
 120                 BOOL httpsendrequest = HttpSendRequest(hResourceHandle, nullptr, 0, nullptr, 0);
 121
 122                 DWORD dwError = InternetErrorDlg(m_hWnd, hResourceHandle, ERROR_SUCCESS, FLAGS_ERROR_UI_FILTER_FOR_ERRORS | FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS | FLAGS_ERROR_UI_FLAGS_GENERATE_DATA, nullptr);
 123
 124                 if (dwError == ERROR_INTERNET_FORCE_RETRY)
 125                         goto resend;
 126                 else if (!httpsendrequest)
 127                 {
 128                         DWORD err = GetLastError();
 129                         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": Download of %s failed: %d, %d\n", (LPCTSTR)url, httpsendrequest, err);
 130                         return err;
 131                 }
 132         }
 133
 134         DWORD contentLength = 0;
 135         {
 136                 DWORD length = sizeof(contentLength);
 137                 HttpQueryInfo(hResourceHandle, HTTP_QUERY_CONTENT_LENGTH | HTTP_QUERY_FLAG_NUMBER, (LPVOID)&contentLength, &length, nullptr);
 138         }
 139         {
 140                 DWORD statusCode = 0;
 141                 DWORD length = sizeof(statusCode);
 142                 if (!HttpQueryInfo(hResourceHandle, HTTP_QUERY_STATUS_CODE | HTTP_QUERY_FLAG_NUMBER, (LPVOID)&statusCode, &length, nullptr) || statusCode != 200)
 143                 {
 144                         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": Download of %s returned %d\n", (LPCTSTR)url, statusCode);
 145                         if (statusCode == 404)
 146                                 return ERROR_FILE_NOT_FOUND;
 147                         else if (statusCode == 403)
 148                                 return ERROR_ACCESS_DENIED;
 149                         return (DWORD)INET_E_DOWNLOAD_FAILURE;
 150                 }
 151         }
 152
 153         CFile destinationFile;
 154         if (!destinationFile.Open(dest, CFile::modeCreate | CFile::modeWrite))
 155         {
 156                 return ERROR_ACCESS_DENIED;
 157         }
 158         DWORD downloadedSum = 0; // sum of bytes downloaded so far
 159         do
 160         {
 161                 DWORD size; // size of the data available
 162                 if (!InternetQueryDataAvailable(hResourceHandle, &size, 0, 0))
 163                 {
 164                         DWORD err = GetLastError();
 165                         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": Download of %s failed on InternetQueryDataAvailable: %d\n", (LPCTSTR)url, err);
 166                         return err;
 167                 }
 168
 169                 DWORD downloaded; // size of the downloaded data
 170                 auto buff = std::make_unique<char[]>(size + 1);
 171                 if (!InternetReadFile(hResourceHandle, (LPVOID)buff.get(), size, &downloaded))
 172                 {
 173                         DWORD err = GetLastError();
 174                         CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": Download of %s failed on InternetReadFile: %d\n", (LPCTSTR)url, err);
 175                         return err;
 176                 }
 177
 178                 if (downloaded == 0)
 179                         break;
 180
 181                 buff[downloaded] = '\0';
 182                 destinationFile.Write(buff.get(), downloaded);
 183
 184                 downloadedSum += downloaded;
 185
 186                 if (!showProgress)
 187                         continue;
 188
 189                 ASSERT(m_uiMsg && m_eventStop);
 190
 191                 if (contentLength == 0) // got no content-length from webserver
 192                 {
 193                         DOWNLOADSTATUS downloadStatus = { 0, 1 + 1 }; // + 1 for download of signature file
 194                         ::SendMessage(m_hWnd, m_uiMsg, 0, reinterpret_cast<LPARAM>(&downloadStatus));
 195                 }
 196                 else
 197                 {
 198                         if (downloadedSum > contentLength)
 199                                 downloadedSum = contentLength - 1;
 200                         DOWNLOADSTATUS downloadStatus = { downloadedSum, contentLength + 1 }; // + 1 for download of signature file
 201                         ::SendMessage(m_hWnd, m_uiMsg, 0, reinterpret_cast<LPARAM>(&downloadStatus));
 202                 }
 203
 204                 if (::WaitForSingleObject(*m_eventStop, 0) == WAIT_OBJECT_0)
 205                 {
 206                         return (DWORD)E_ABORT; // canceled by the user
 207                 }
 208         }
 209         while (true);
 210
 211         if (downloadedSum == 0)
 212         {
 213                 CTraceToOutputDebugString::Instance()(_T(__FUNCTION__) L": Download size of %s was zero.\n", (LPCTSTR)url);
 214                 return (DWORD)INET_E_DOWNLOAD_FAILURE;
 215         }
 216         return ERROR_SUCCESS;
 217 }