取文件后缀
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LPWSTR lpszExt = PathFindExtension(lpszFile); CString strExt = lpszExt; |
Ext默认打开应用
- 仅处理了
HKEY_CLASSES_ROOT这一层。 HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mp4\UserChoice这里的优先级会更高。
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BOOL KRcmdMonDefendImpl::GetExistDefaultApplication(LPCTSTR lpszExt, BOOL& bDefaultApplication, CString& strApplicationName) { BOOL bRet = FALSE; bDefaultApplication = FALSE; strApplicationName.Empty(); do { if (lpszExt == NULL) { break; } cf::reg::KRegister reg; if (!reg.Open(HKEY_CLASSES_ROOT, lpszExt)) { break; } CString strRes; if (!reg.Read(L"", strRes)) { break; } bDefaultApplication = !strRes.IsEmpty(); if (!bDefaultApplication) { break; } CString strTempPath; strTempPath.Format(L"%s\\shell\\open\\command", strRes); if (!reg.Open(HKEY_CLASSES_ROOT, strTempPath)) { break; } CString strTempRes; if (!reg.Read(L"", strTempRes)) { break; } if (strTempRes.IsEmpty()) { break; } CString strExpanded = ExpandEnvironmentStrings(strTempRes); std::wstring strTempResult(strExpanded); std::wstring strExt(L".exe"); std::wstring strExeName; if (!GetFileNameFromCmdLine(strTempResult, strExt, TRUE, strExeName)) { break; } strApplicationName = strExeName.c_str(); bRet = TRUE; } while (false); return bRet; } |
对路径中的环境变量展开
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CString KRcmdMonDefendImpl::ExpandEnvironmentStrings(const TCHAR *szSrc) { CString strRes(szSrc); HANDLE hProcess; HANDLE hToken; hProcess = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, GetCurrentProcessId()); bool bRet = false; if (hProcess != nullptr) { bRet = OpenProcessToken(hProcess, TOKEN_IMPERSONATE | TOKEN_QUERY, &hToken); if (bRet) { TCHAR szExpandedPath[MAX_PATH]; bRet = ExpandEnvironmentStringsForUser(hToken, szSrc, szExpandedPath, sizeof(szExpandedPath)); if (bRet) { strRes = szExpandedPath; } CloseHandle(hToken); } CloseHandle(hProcess); } return strRes; } |
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