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服务器之家 - 编程语言 - C/C++ - c++文件监控之FileSystemWatcher

c++文件监控之FileSystemWatcher

2021-07-27 12:12C++教程网 C/C++

为了监控web程序的静态文件是否被恶意改动,所以学习了一下FileSystemWatcher 类对文件的监控,由于还在初级阶段,这里只贴一下关于FileSystemWatcher学习的一些代码

具体代码如下:

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#using <System.dll>
#include <iostream>
 
using namespace std;
using namespace System;
using namespace System::IO;
using namespace System::Security::Permissions;
 
public ref class Watcher
{
private:
  // Define the event handlers.
  static void OnChanged( Object^ /*source*/, FileSystemEventArgs^ e )
  {
   // Specify what is done when a file is changed, created, or deleted.
   Console::WriteLine( "File: {0} {1}", e->FullPath, e->ChangeType );
  }
 
  static void OnRenamed( Object^ /*source*/, RenamedEventArgs^ e )
  {
   // Specify what is done when a file is renamed.
   Console::WriteLine( "File: {0} renamed to {1}", e->OldFullPath, e->FullPath );
  }
 
public:
  [PermissionSet(SecurityAction::Demand, Name="FullTrust")]
  int static run()
  {
   //array<String^>^args = System::Environment::GetCommandLineArgs();
   //创建一个FileSystemWatcher并设置它的属性.
   FileSystemWatcher^ fsWatcher = gcnew FileSystemWatcher( );
   fsWatcher->Path = "C:\\files";
 
   /* Watch for changes in LastAccess and LastWrite times, and
     the renaming of files or directories. */
   fsWatcher->NotifyFilter = static_cast<NotifyFilters>(//监听文件的以下属性 按需求添加 这里我添加了一些常用的
                NotifyFilters::LastAccess | //文件或文件夹上一次打开的日期。
                NotifyFilters::LastWrite | //上一次向文件或文件夹写入内容的日期
                NotifyFilters::FileName | //文件名
                NotifyFilters::DirectoryName | //目录名
                NotifyFilters::Size); //大小
 
   //监听子目录
   fsWatcher->IncludeSubdirectories = true;
   // Only watch text files.
   //fsWatcher->Filter = "*.txt";
 
   // Add event handlers.
   fsWatcher->Changed += gcnew FileSystemEventHandler( Watcher::OnChanged );
   fsWatcher->Created += gcnew FileSystemEventHandler( Watcher::OnChanged );
   fsWatcher->Deleted += gcnew FileSystemEventHandler( Watcher::OnChanged );
   fsWatcher->Renamed += gcnew RenamedEventHandler( Watcher::OnRenamed );
 
   // Begin watching.
   fsWatcher->EnableRaisingEvents = true;
 
   // Wait for the user to quit the program.
   Console::WriteLine( "Press \'q\' to quit the sample." );
   while ( Console::Read() != 'q' );
 
   return 0;
  }
};
 
int main() {
  Watcher::run();
}

过程 1.首先创建FileSystemWatcher 对象  用来设置一些属性以及添加监听事件

   2.设置监听目录

   3.设置监听文件的属性

   4.设置监听子目录

   5.添加监听事件

   6.开始监听

上面的sample代码可以在MSDN上找到,如果有不确定的地方,可以查看文档

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