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{ ############################################################################ }
{ # # }
{ # MirandaNG HistoryToDB Plugin v2.5 # }
{ # # }
{ # License: GPLv3 # }
{ # # }
{ # Author: Grigorev Michael (icq: 161867489, email: sleuthhound@gmail.com) # }
{ # # }
{ ############################################################################ }
unit FSMonitor;
{$I jedi.inc}
interface
type
// Структура с информацией об изменении в файловой системе (передается в callback процедуру)
PInfoCallBack = ^TInfoCallBack;
TInfoCallBack = record
FAction : Integer; // Тип изменения (константы FILE_ACTION_XXX)
FDrive : String; // Диск, на котором было изменение
FOldFileName : String; // Имя файла до переименования
FNewFileName : String; // Имя файла после переименования
end;
// callback процедура, вызываемая при изменении в файловой системе
TWatchFileSystemCallBack = procedure (pInfo: TInfoCallBack);
{ Запуск мониторинга файловой системы
Праметры:
pName - имя папки для мониторинга
pFilter - комбинация констант FILE_NOTIFY_XXX
pSubTree - мониторить ли все подпапки заданной папки
pInfoCallBack - адрес callback процедуры, вызываемой при изменении в файловой системе }
procedure StartWatch(pName: String; pFilter: Cardinal; pSubTree: Boolean; pInfoCallBack: TWatchFileSystemCallBack);
// Остановка мониторинга
procedure StopWatch;
implementation
uses
Classes, Windows, SysUtils, IniFiles;
const
FILE_LIST_DIRECTORY = $0001;
type
PFileNotifyInformation = ^TFileNotifyInformation;
TFileNotifyInformation = record
NextEntryOffset : DWORD;
Action : DWORD;
FileNameLength : DWORD;
FileName : Array[0..0] of WideChar;
end;
WFSError = class(Exception);
TWFS = class(TThread)
private
FName : String;
FFilter : Cardinal;
FSubTree : Boolean;
FInfoCallBack : TWatchFileSystemCallBack;
FWatchHandle : THandle;
FWatchBuf : Array[0..4096] of Byte;
FOverLapp : TOverlapped;
FPOverLapp : POverlapped;
FBytesWritte : DWORD;
FCompletionPort : THandle;
FNumBytes : Cardinal;
FOldFileName : String;
function CreateDirHandle(aDir: string): THandle;
procedure WatchEvent;
//procedure HandleEvent;
protected
procedure Execute; override;
public
constructor Create(pName: String; pFilter: Cardinal; pSubTree: Boolean; pInfoCallBack: TWatchFileSystemCallBack);
destructor Destroy; override;
end;
var
WFS : TWFS;
procedure StartWatch(pName: String; pFilter: Cardinal; pSubTree: Boolean; pInfoCallBack: TWatchFileSystemCallBack);
begin
WFS := TWFS.Create(pName, pFilter, pSubTree, pInfoCallBack);
end;
procedure StopWatch;
begin
if Assigned(WFS) then
begin
PostQueuedCompletionStatus(WFS.FCompletionPort, 0, 0, nil);
WFS.Terminate;
WFS.WaitFor;
WFS.Free;
WFS := nil;
end;
end;
constructor TWFS.Create(pName: String; pFilter: Cardinal; pSubTree: Boolean; pInfoCallBack: TWatchFileSystemCallBack);
begin
inherited Create(True);
FreeOnTerminate := False;
FName := IncludeTrailingBackslash(pName);
FFilter := pFilter;
FSubTree := pSubTree;
FOldFileName := EmptyStr;
ZeroMemory(@FOverLapp, SizeOf(TOverLapped));
FPOverLapp := @FOverLapp;
ZeroMemory(@FWatchBuf, SizeOf(FWatchBuf));
FInfoCallBack := pInfoCallBack;
Resume;
end;
destructor TWFS.Destroy;
begin
PostQueuedCompletionStatus(FCompletionPort, 0, 0, nil);
CloseHandle(FWatchHandle);
FWatchHandle := 0;
CloseHandle(FCompletionPort);
FCompletionPort := 0;
inherited Destroy;
end;
function TWFS.CreateDirHandle(aDir: String): THandle;
begin
Result := CreateFile(PChar(aDir), FILE_LIST_DIRECTORY, FILE_SHARE_READ+FILE_SHARE_DELETE+FILE_SHARE_WRITE,
nil,OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS or FILE_FLAG_OVERLAPPED, 0);
end;
procedure TWFS.Execute;
begin
FWatchHandle := CreateDirHandle(FName);
WatchEvent;
end;
{procedure TWFS.HandleEvent;
var
FileNotifyInfo : PFileNotifyInformation;
InfoCallBack : TInfoCallBack;
Offset : Longint;
begin
Pointer(FileNotifyInfo) := @FWatchBuf[0];
repeat
Offset := FileNotifyInfo^.NextEntryOffset;
InfoCallBack.FAction := FileNotifyInfo^.Action;
InfoCallBack.FDrive := FName;
SetString(InfoCallBack.FNewFileName,FileNotifyInfo^.FileName,FileNotifyInfo^.FileNameLength );
InfoCallBack.FNewFileName := Trim(InfoCallBack.FNewFileName);
case FileNotifyInfo^.Action of
FILE_ACTION_RENAMED_OLD_NAME: FOldFileName := Trim(WideCharToString(@(FileNotifyInfo^.FileName[0])));
FILE_ACTION_RENAMED_NEW_NAME: InfoCallBack.FOldFileName := FOldFileName;
end;
FInfoCallBack(InfoCallBack);
PChar(FileNotifyInfo) := PChar(FileNotifyInfo)+Offset;
until (Offset=0) or Terminated;
end;}
procedure TWFS.WatchEvent;
var
{$ifdef DELPHIXE_UP}
CompletionKey: DWORD_PTR;
{$ELSE}
CompletionKey: Cardinal;
{$endif}
// Перенесено из HandleEvent
FileNotifyInfo : PFileNotifyInformation;
InfoCallBack : TInfoCallBack;
Offset : Longint;
// End
begin
FCompletionPort := CreateIoCompletionPort(FWatchHandle, 0, Longint(pointer(self)), 0);
ZeroMemory(@FWatchBuf, SizeOf(FWatchBuf));
if not ReadDirectoryChanges(FWatchHandle, @FWatchBuf, SizeOf(FWatchBuf), FSubTree,
FFilter, @FBytesWritte, @FOverLapp, 0) then
begin
raise WFSError.Create(SysErrorMessage(GetLastError));
Terminate;
end
else
begin
while not Terminated do
begin
GetQueuedCompletionStatus(FCompletionPort, FNumBytes, CompletionKey, FPOverLapp, INFINITE);
if CompletionKey <> 0 then
begin
//Synchronize(HandleEvent);
{ Т.к. Synchronize(HandleEvent) не отрабатывает в
плагине по непонятной причине, то его код перенесен сюда
Подробнее тут -> http://forum.qip.ru/showthread.php?t=25200 }
Pointer(FileNotifyInfo) := @FWatchBuf[0];
repeat
Offset := FileNotifyInfo^.NextEntryOffset;
InfoCallBack.FAction := FileNotifyInfo^.Action;
InfoCallBack.FDrive := FName;
SetString(InfoCallBack.FNewFileName,FileNotifyInfo^.FileName,FileNotifyInfo^.FileNameLength );
InfoCallBack.FNewFileName := Trim(InfoCallBack.FNewFileName);
case FileNotifyInfo^.Action of
FILE_ACTION_RENAMED_OLD_NAME: FOldFileName := Trim(WideCharToString(@(FileNotifyInfo^.FileName[0])));
FILE_ACTION_RENAMED_NEW_NAME: InfoCallBack.FOldFileName := FOldFileName;
end;
FInfoCallBack(InfoCallBack);
PChar(FileNotifyInfo) := PChar(FileNotifyInfo)+Offset;
until (Offset=0) or Terminated;
// End synchronize
ZeroMemory(@FWatchBuf, SizeOf(FWatchBuf));
FBytesWritte := 0;
ReadDirectoryChanges(FWatchHandle, @FWatchBuf, SizeOf(FWatchBuf), FSubTree, FFilter,
@FBytesWritte, @FOverLapp, 0);
end
else
Terminate;
end
end
end;
end.
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