Delphi 2009及以上版本中的捕获控制台

Question

Delphi 2009及以上版本中的捕获控制台

3

下面的代码适用于Delphi XE，但2400缓冲区大小非常丑陋。有没有人对清理这个例程有一些建议？并使2400限制消失（而不定义64000缓冲区）。谢谢。


procedure TForm1.Button1Click(Sender: TObject);
begin
     CaptureConsoleOutput('c:\windows\system32\ipconfig','',Memo1);
end;

procedure TForm1.CaptureConsoleOutput(const ACommand, AParameters: String; AMemo: TMemo); const CReadBuffer = 2400; var saSecurity: TSecurityAttributes; hRead: THandle; hWrite: THandle; suiStartup: TStartupInfo; piProcess: TProcessInformation; pBuffer: array[0..CReadBuffer] of AnsiChar; dRead: DWord; dRunning: DWord; begin // 设置访问权限 saSecurity.nLength := SizeOf(TSecurityAttributes); saSecurity.bInheritHandle := True; saSecurity.lpSecurityDescriptor := nil;

// 创建管道 if CreatePipe(hRead, hWrite, @saSecurity, 0) then begin // 初始化启动信息 FillChar(suiStartup, SizeOf(TStartupInfo), #0); suiStartup.cb := SizeOf(TStartupInfo); suiStartup.hStdInput := hRead; suiStartup.hStdOutput := hWrite; suiStartup.hStdError := hWrite; suiStartup.dwFlags := STARTF_USESTDHANDLES or STARTF_USESHOWWINDOW; suiStartup.wShowWindow := SW_HIDE;

 if CreateProcess(nil, PChar(ACommand + ' ' + AParameters), @saSecurity,
   @saSecurity, True, NORMAL_PRIORITY_CLASS, nil, nil, suiStartup, piProcess)
   then
 begin
   repeat
     dRunning  := WaitForSingleObject(piProcess.hProcess, 100);
     Application.ProcessMessages();
     repeat
       dRead := 0;
       ReadFile(hRead, pBuffer[0], CReadBuffer, dRead, nil);
       pBuffer[dRead] := #0;

       OemToAnsi(pBuffer, pBuffer);
       AMemo.Lines.Add(String(pBuffer));
     until (dRead < CReadBuffer);
   until (dRunning <> WAIT_TIMEOUT);
   CloseHandle(piProcess.hProcess);
   CloseHandle(piProcess.hThread);
 end;

 CloseHandle(hRead);
 CloseHandle(hWrite);

结束; 结束;

- user296191

1

由于函数目标似乎是捕获网络卡地址，使用网络API来实现所需的结果是否比生成IPCONFIG更好？ - Felice Pollano

感谢您的反馈，主要目的不是调用ipconfig。这只是一个示例，以显示我正在捕获dos输出。它可以是命令行编译器或任何其他实用程序。 - user296191

1个回答

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- David Heffernan · Accepted Answer

我有一些能够做这件事的代码。我已经删除了各种不相关的部分，因此这段代码可能不能直接编译。但是您应该可以理解：

  procedure ReadStdout(hstdout: THandle; out stdout: string);
  var
    Buffer: AnsiString;
    FileSize: DWORD;
    NumberOfBytesRead: DWORD;
  begin
    FileSize := SetFilePointer(hstdout, 0, nil, FILE_END);
    if FileSize>0 then begin
      SetLength(Buffer, FileSize);
      SetFilePointer(hstdout, 0, nil, FILE_BEGIN);
      ReadFile(hstdout, Buffer[1], FileSize, NumberOfBytesRead, nil);
      //should really check that NumberOfBytesRead=FileSize
      stdout := Buffer;
    end else begin
      stdout := '';
    end;
  end;

  function CreateFileHandle(const FileName: string): THandle;
  var
    SecurityAttributes: TSecurityAttributes;
  begin
    ZeroMemory(@SecurityAttributes, SizeOf(SecurityAttributes));
    SecurityAttributes.nLength := SizeOf(SecurityAttributes);
    SecurityAttributes.lpSecurityDescriptor := nil;
    SecurityAttributes.bInheritHandle := True;
    Result := CreateFile(
      PChar(FileName),
      GENERIC_READ or GENERIC_WRITE,
      FILE_SHARE_READ or FILE_SHARE_WRITE,
      @SecurityAttributes,
      CREATE_ALWAYS,
      FILE_ATTRIBUTE_NORMAL or FILE_FLAG_WRITE_THROUGH,
      0
    );
  end;

  procedure Execute(const ExecutableFileName, DataFileName, TempFolder: string);
  var        
    hstdin, hstdout: THandle;
    StartupInfo: TStartupInfo;
    ProcessInfo: TProcessInformation;
    ExitCode: DWORD;
    stdout: string;
  begin
    hstdin := CreateFileHandle(TempFolder+'stdin');
    hstdout := CreateFileHandle(TempFolder+'stdout');
    Try
      ZeroMemory(@StartupInfo, SizeOf(StartupInfo));
      StartupInfo.cb := SizeOf(StartupInfo);
      StartupInfo.dwFlags := STARTF_USESHOWWINDOW or STARTF_USESTDHANDLES;
      StartupInfo.wShowWindow := SW_HIDE;
      StartupInfo.hStdInput := hstdin;
      StartupInfo.hStdError := hstdout;
      if CreateProcess(
        PChar(ExecutableFileName),
        '',
        nil,
        nil,
        True,
        CREATE_NO_WINDOW or NORMAL_PRIORITY_CLASS,
        nil,
        PChar(TempFolder),
        StartupInfo,
        ProcessInfo
      ) then begin            
        Try
          WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
          GetExitCodeProcess(ProcessInfo.hProcess, ExitCode);
          ReadStdout(hstdout, stdout);
        Finally
          CloseHandle(ProcessInfo.hProcess);
          CloseHandle(ProcessInfo.hThread);
        End;
      end else begin
        //error;
      end;
    Finally
      CloseHandle(hstdout);
      CloseHandle(hstdin);
    End;
  end;

你需要在某个时候清理临时文件。