这个server触发不了OnClientRead事件,请问如何改？

[xlwszj]

我是初学者，这是我从网上下载的一个程序，想改改学习学习
想把接收到的数据显示出来，可就是触发不了OnClientRead事件，哪位高手能帮我改改，谢谢啦！！！

unit ServerMainUnit;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, SyncObjs, StdCtrls, ExtCtrls, ScktComp;

type
TServerMainForm = class(TForm)
PortEdit: TEdit;
ActiveButton: TButton;
Label1: TLabel;
MsgMemo: TMemo;
Button1: TButton;
ClientMsgEdit: TEdit;
GroupBox1: TGroupBox;
Label3: TLabel;
Label6: TLabel;
CountText: TStaticText;
ConnectionCountText: TStaticText;
Timer1: TTimer;
Memo1: TMemo;
Memo2: TMemo;
procedure ActiveButtonClick(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Timer1Timer(Sender: TObject);
private
FRequestCount: Integer;
FLock: TCriticalSection;
FServerSocket: TServerSocket;
FServerActive: Boolean;
function OnClientRead(ASocket: TCustomSocket; AData: Pointer;
ACount: Integer): Integer;
procedure OnClientError(ASocket: TCustomSocket; ErrorEvent: TErrorEvent;
var ErrCode: Integer);
procedure OnClientEvent(ASocket: TCustomSocket; SocketEvent: TSocketEvent);
procedure SetServerActive(const Value: Boolean);
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
property ServerActive: Boolean read FServerActive write SetServerActive;
end;

var
ServerMainForm: TServerMainForm;

implementation

uses CommonUnit, TypInfo;
{$R *.dfm}

{ TServerMainForm }

constructor TServerMainForm.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FLock := TCriticalSection.Create;
FServerSocket := TServerSocket.Create(FServerSocket);
FServerSocket.OnClientRead := OnClientRead;
FServerSocket.OnClientError := OnClientError;
FServerSocket.OnClientEvent := OnClientEvent;
FServerSocket.OnErrorEvent := OnClientError;
FServerSocket.OnEventEvent := OnClientEvent;
end;

destructor TServerMainForm.Destroy;
begin
Timer1.Enabled := False;
FServerSocket.Free;
FLock.Free;
inherited Destroy;
end;

procedure TServerMainForm.OnClientError(ASocket: TCustomSocket;
ErrorEvent: TErrorEvent; var ErrCode: Integer);
begin
FLock.Enter;
try
MsgMemo.Lines.Add('Error: ' + SysErrorMessage(ErrCode))
finally
FLock.Leave;
end;
end;

procedure TServerMainForm.OnClientEvent(ASocket: TCustomSocket;
SocketEvent: TSocketEvent);
begin
{ FLock.Enter;
try
MsgMemo.Lines.Add(GetEnumName(TypeInfo(TSocketEvent), Ord(SocketEvent)));
if SocketEvent in [seConnect, seDisconnect] then
finally
FLock.Leave;
end; }
end;

function TServerMainForm.OnClientRead(ASocket: TCustomSocket;
AData: Pointer; ACount: Integer): Integer;
begin
FLock.Enter;
try
Inc(FRequestCount);
finally
FLock.Leave;
end;
{ 接收到后，再发送回去 }
ASocket.Write(AData^, ACount);
Result := 0;
end;

procedure TServerMainForm.SetServerActive(const Value: Boolean);
begin
if Value then
begin
FServerSocket.Port := StrToInt(PortEdit.Text);
FServerSocket.Open;
end else
FServerSocket.Close;
FServerActive := Value;
FRequestCount := 0;
end;

procedure TServerMainForm.ActiveButtonClick(Sender: TObject);
const
SCaption: array [Boolean] of string = ('Start', 'Stop');
begin
ServerActive := not ServerActive;
ActiveButton.Caption := SCaption[ServerActive];
end;

procedure TServerMainForm.Button1Click(Sender: TObject);
var
S: string;
D: TDataBlock;
I, Count: Integer;
begin
S := ClientMsgEdit.Text;
FillChar(D, SizeOf(D), 0);
D.Len := Length(S);
StrPCopy(D.Content, S);
Count := SizeOf(Integer) + Length(S);
for I := 0 to FServerSocket.ClientCount - 1 do
FServerSocket.Clients[I].Write(D, Count);
end;

procedure TServerMainForm.Timer1Timer(Sender: TObject);
begin
ConnectionCountText.Caption := IntToStr(FServerSocket.ClientCount);
CountText.Caption := IntToStr(FRequestCount);
end;

end.

[xlwszj]

unit IOCPComp;

interface

{$IFDEF VER150}
{$WARN UNSAFE_TYPE OFF}
{$WARN UNSAFE_CODE OFF}
{$WARN UNSAFE_CAST OFF}
{$ENDIF}

uses
Windows, Messages, WinSock2, Classes, ScktComp, SysUtils;

const
MAX_BUFSIZE = 4096;
WM_CLIENTSOCKET = WM_USER + $2000;

type
TCMSocketMessage = packed record
Msg: Cardinal;
Socket: TSocket;
SelectEvent: Word;
SelectError: Word;
Result: Longint;
end;

TSocketEvent = (seInitIOPort, seInitSocket, seConnect, seDisconnect,
seListen, seAccept, seWrite, seRead);
TErrorEvent = (eeGeneral, eeSend, eeReceive, eeConnect, eeDisconnect, eeAccept);

PPerHandleData = ^TPerHandleData;
TPerHandleData = packed record
Overlapped: OVERLAPPED;
wsaBuffer: WSABUF;
Event: TSocketEvent;
IsUse: Boolean;
Buffer: array [0..MAX_BUFSIZE - 1] of Char;
end;

PBlock = ^TBlock;
TBlock = packed record
Data: TPerHandleData;
IsUse: Boolean;
end;

EMemoryBuffer = class(Exception);
ESocketError = class(Exception);

TCustomSocket = class;
TServerClientSocket = class;

TOnDataEvent = function(Socket: TCustomSocket; Data: Pointer; Count: Integer): Integer of object;
TSocketErrorEvent = procedure(Socket: TCustomSocket; ErrorEvent: TErrorEvent; var ErrCode: Integer) of object;
TSocketEventEvent = procedure(Socket: TCustomSocket; SocketEvent: TSocketEvent) of object;


TMemoryBuffer = class
private
FList: TList;
FSocket: TCustomSocket;
function GetCount: Integer;
function GetBlock(const Index: Integer): PBlock;
protected
property Count: Integer read GetCount;
property Blocks[const Index: Integer]: PBlock read GetBlock;
public
constructor Create(ASocket: TCustomSocket); overload;
constructor Create(ASocket: TCustomSocket; BlockCount: Integer); overload;
destructor Destroy; override;
function AllocBlock: PBlock;
procedure RemoveBlock(Block: PBlock);
end;

TCustomSocket = class
private
FSocket: TSocket;
FActive: Boolean;
FInitLock: Boolean;
FLock: TRTLCriticalSection;
FOnRead: TOnDataEvent;
FOnErrorEvent: TSocketErrorEvent;
FOnEventEvent: TSocketEventEvent;
function GetRemoteAddress: string;
function GetRemoteHost: string;
procedure DoRead(Data: Pointer; Count: Integer);
protected
procedure SetActive(Value: Boolean); virtual; abstract;
procedure Event(SocketEvent: TSocketEvent); virtual;
procedure Error(ErrorEvent: TErrorEvent; var ErrCode: Integer); virtual;
property OnRead: TOnDataEvent read FOnRead write FOnRead;
property OnErrorEvent: TSocketErrorEvent read FOnErrorEvent write FOnErrorEvent;
property OnEventEvent: TSocketEventEvent read FOnEventEvent write FOnEventEvent;
public
constructor Create(ASocket: TSocket);
destructor Destroy; override;
procedure Close;
procedure Open;
procedure Lock;
procedure UnLock;
function Read(var Buf; Count: Integer): Integer; virtual;
function Write(var Buf; Count: Integer): Integer; virtual;
property SocketHandle: TSocket read FSocket;
property Active: Boolean read FActive write SetActive;
property RemoteHost: string read GetRemoteHost;
property RemoteAddress: string read GetRemoteAddress;
end;

TCustomerServerSocket = class(TCustomSocket)
private
FOnClientRead: TOnDataEvent;
FOnClientError: TSocketErrorEvent;
FOnClientEvent: TSocketEventEvent;
protected
function DoClientRead(ASocket: TCustomSocket; AData: Pointer; ACount: Integer): Integer;
procedure ClientSocketError(ASocket: TCustomSocket;
ErrorEvent: TErrorEvent; var ErrCode: Integer);
procedure ClientSocketEvent(ASocket: TCustomSocket; SocketEvent: TSocketEvent);
public
property OnClientRead: TOnDataEvent read FOnClientRead write FOnClientRead;
property OnClientError: TSocketErrorEvent read FOnClientError write FOnClientError;
property OnClientEvent: TSocketEventEvent read FOnClientEvent write FOnClientEvent;
property OnErrorEvent;
property OnEventEvent;
end;

TGetSocketEvent = procedure(Socket: TSocket; var ClientSocket: TServerClientSocket) of object;
TServerSocket = class(TCustomerServerSocket)
private
FPort: Integer;
FAddr: TSockAddr;
FAcceptThread: TThread;
FCompletionPort: THandle;
FClients: TList;
FThreads: TList;
FHandle: THandle;
FBuffer: TMemoryBuffer;
FOnGetSocket: TGetSocketEvent;
procedure SetPort(Value: Integer);
procedure RegisterClient(ASocket: TCustomSocket);
procedure RemoveClient(ASocket: TCustomSocket);
procedure WMClientClose(var Message: TCMSocketMessage); message WM_CLIENTSOCKET;
procedure WndProc(var Message: TMessage);
function FindClientSocket(ASocket: TSocket): TCustomSocket;
function GetClientCount: Integer;
function GetClients(const Index: Integer): TServerClientSocket;
protected
procedure InternalOpen;
procedure InternalClose;
procedure SetActive(Value: Boolean); override;
property CompletionPort: THandle read FCompletionPort;
function IsAccept(Socket: TSocket): Boolean; virtual;
public
constructor Create;
destructor Destroy; override;
procedure Accept(ASocket: TSocket; ACompletionPort: THandle);
property Handle: THandle read FHandle;
property Port: Integer read FPort write SetPort;
property ClientCount: Integer read GetClientCount;
property Clients[const Index: Integer]: TServerClientSocket read GetClients;
property OnGetSocket: TGetSocketEvent read FOnGetSocket write FOnGetSocket;
end;

[xlwszj]

{unit IOCPComp;}
TServerClientSocket = class(TCustomSocket)
private
FBlock: TList;
FBuffer: TMemoryBuffer;
FServerSocket: TServerSocket;
function AllocBlock: PBlock;
function PrepareRecv(Block: PBlock = nil): Boolean;
function WorkBlock(var Block: PBlock; Transfered: DWORD): DWORD;
protected
procedure SetActive(Value: Boolean); override;
public
constructor Create(AServerSocket: TServerSocket; ASocket: TSocket);
destructor Destroy; override;
function Read(var Buf; Count: Integer): Integer; override;
function Write(var Buf; Count: Integer): Integer; override;
end;

TSocketThread = class(TThread)
private
FServer: TServerSocket;
public
constructor Create(AServer: TServerSocket);
end;

TAcceptThread = class(TSocketThread)
protected
procedure Execute; override;
end;

TWorkerThread = class(TSocketThread)
protected
procedure Execute; override;
end;

implementation

uses RTLConsts;

const
SHUTDOWN_FLAG = $FFFFFFFF;
BlockSize: Word = SizeOf(TBlock);

var
WSData: TWSAData;

{ TMemoryBuffer }

constructor TMemoryBuffer.Create(ASocket: TCustomSocket);
begin
Create(ASocket, 200);
end;

constructor TMemoryBuffer.Create(ASocket: TCustomSocket; BlockCount: Integer);
var
I: Integer;
P: PBlock;
begin
inherited Create;
FSocket := ASocket;
FList := TList.Create;
for I := 0 to BlockCount - 1 do
begin
New(P);
FillChar(P^, BlockSize, 0);
FList.Add(P);
end;
end;

destructor TMemoryBuffer.Destroy;
var
I: Integer;
begin
for I := 0 to FList.Count - 1 do
FreeMem(FList[I]);
FList.Free;
inherited Destroy;
end;

function TMemoryBuffer.AllocBlock: PBlock;
var
I: Integer;
begin
FSocket.Lock;
try
Result := nil;
for I := 0 to FList.Count - 1 do
begin
Result := FList[I];
if not Result.IsUse then
break;
end;
if not Assigned(Result) or Result.IsUse then
begin
New(Result);
FList.Add(Result);
end;
FillChar(Result^.Data, SizeOf(Result^.Data), 0);
Result^.IsUse := True;
finally
FSocket.UnLock;
end;
end;

procedure TMemoryBuffer.RemoveBlock(Block: PBlock);
begin
FSocket.Lock;
try
Block.IsUse := False;
finally
FSocket.UnLock;
end;
end;

function TMemoryBuffer.GetCount: Integer;
begin
Result := FList.Count;
end;

function TMemoryBuffer.GetBlock(const Index: Integer): PBlock;
begin
if (Index >= Count) or (Index <= -1) then
raise EMemoryBuffer.CreateFmt(SListIndexError, [Index])
else
Result := FList[Index];
end;

procedure CheckError(ResultCode: Integer; const OP: string);
var
ErrCode: Integer;
begin
if ResultCode <> 0 then
begin
ErrCode := WSAGetLastError;
if (ErrCode <> WSAEWOULDBLOCK) or (ErrCode <> ERROR_IO_PENDING) then
raise ESocketError.CreateFmt(SWindowsSocketError,
[SysErrorMessage(ErrCode), ErrCode, Op]);
end;
end;

{ TCustomSocket }

constructor TCustomSocket.Create(ASocket: TSocket);
begin
inherited Create;
FInitLock := False;
if WSAStartup($0202, WSData) <> 0 then
raise ESocketError.Create(SysErrorMessage(GetLastError));
FSocket := ASocket;
FActive := FSocket <> INVALID_SOCKET;
end;

destructor TCustomSocket.Destroy;
begin
SetActive(False);
WSACleanup;
if FInitLock then
DeleteCriticalSection(FLock);
inherited Destroy;
end;

procedure TCustomSocket.Lock;
begin
if not FInitLock then
begin
InitializeCriticalSection(FLock);
FInitLock := True;
end;
EnterCriticalSection(FLock);
end;

procedure TCustomSocket.UnLock;
begin
if FInitLock then
LeaveCriticalSection(FLock);
end;

procedure TCustomSocket.Close;
begin
SetActive(False);
end;

procedure TCustomSocket.Open;
begin
SetActive(True);
end;

procedure TCustomSocket.DoRead(Data: Pointer; Count: Integer);
begin
if Assigned(FOnRead) then
FOnRead(Self, Data, Count);
end;

procedure TCustomSocket.Error(ErrorEvent: TErrorEvent; var ErrCode: Integer);
begin
if Assigned(FOnErrorEvent) then
FOnErrorEvent(Self, ErrorEvent, ErrCode);
end;

procedure TCustomSocket.Event(SocketEvent: TSocketEvent);
begin
if Assigned(FOnEventEvent) then
FOnEventEvent(Self, SocketEvent);
end;

function TCustomSocket.GetRemoteAddress: string;
var
SockAddrIn: TSockAddrIn;
Size: Integer;
begin
Result := '';
if not FActive then Exit;
Size := SizeOf(SockAddrIn);
CheckError(getpeername(FSocket, SockAddrIn, Size), 'getpeername');
Result := inet_ntoa(SockAddrIn.sin_addr);
end;

function TCustomSocket.GetRemoteHost: string;
var
SockAddrIn: TSockAddrIn;
Size: Integer;
HostEnt: PHostEnt;
begin
Result := '';
if not FActive then Exit;
Size := SizeOf(SockAddrIn);
CheckError(getpeername(FSocket, SockAddrIn, Size), 'getpeername');
HostEnt := gethostbyaddr(@SockAddrIn.sin_addr.s_addr, 4, PF_INET);
if HostEnt <> nil then Result := HostEnt.h_name;
end;

[xlwszj]

{unit IOCPComp;}

function TCustomSocket.Read(var Buf; Count: Integer): Integer;
begin
raise ESocketError.Create('Error');
end;

function TCustomSocket.Write(var Buf; Count: Integer): Integer;
begin
raise ESocketError.Create('Error');
end;

{ TCustomerServerSocket }

function TCustomerServerSocket.DoClientRead(ASocket: TCustomSocket;
AData: Pointer; ACount: Integer): Integer;
begin
if not Assigned(FOnClientRead) then
Result := 0 else
Result := FOnClientRead(ASocket, AData, ACount);
end;

procedure TCustomerServerSocket.ClientSocketError(ASocket: TCustomSocket;
ErrorEvent: TErrorEvent; var ErrCode: Integer);
begin
if Assigned(FOnClientError) then
FOnClientError(ASocket, ErrorEvent, ErrCode);
end;

procedure TCustomerServerSocket.ClientSocketEvent(ASocket: TCustomSocket;
SocketEvent: TSocketEvent);
begin
if Assigned(FOnClientEvent) then
FOnClientEvent(ASocket, SocketEvent);
end;

{ TServerSocket }

procedure TServerSocket.Accept(ASocket: TSocket; ACompletionPort: THandle);
var
Addr: TSockAddrIn;
AddrLen, Ret, ErrCode: Integer;
ClientWinSocket: TSocket;
ClientSocket: TServerClientSocket;
begin
AddrLen := SizeOf(Addr);
ClientWinSocket := WinSock2.accept(ASocket, Addr, AddrLen);
if ClientWinSocket <> INVALID_SOCKET then
begin
if not Active and not IsAccept(ClientWinSocket) then
begin
closesocket(ClientWinSocket);
Exit;
end;
try
Event(seAccept);
ClientSocket := nil;
if Assigned(FOnGetSocket) then
FOnGetSocket(ClientWinSocket, ClientSocket);
if not Assigned(ClientSocket) then
ClientSocket := TServerClientSocket.Create(Self, ClientWinSocket);
except
closesocket(ClientWinSocket);
ErrCode := GetLastError;
Error(eeAccept, ErrCode);
Exit;
end;
Ret := CreateIoCompletionPort(ClientWinSocket, ACompletionPort, DWORD(ClientSocket), 0);
if Ret = 0 then
ClientSocket.Free;
end;
end;

constructor TServerSocket.Create;
begin
inherited Create(INVALID_SOCKET);
FBuffer := TMemoryBuffer.Create(Self);
FClients := TList.Create;
FThreads := TList.Create;

FPort := 211;
FAcceptThread := nil;
FCompletionPort := 0;
IsMultiThread := True;
FHandle := Classes.AllocateHWnd(WndProc);
end;

destructor TServerSocket.Destroy;
begin
SetActive(False);
FThreads.Free;
FClients.Free;
Classes.DeallocateHWnd(FHandle);
FBuffer.Free;
inherited Destroy;
end;

function TServerSocket.FindClientSocket(ASocket: TSocket): TCustomSocket;
var
I: Integer;
begin
Lock;
try
for I := 0 to FClients.Count - 1 do
begin
Result := FClients[I];
if ASocket = Result.SocketHandle then Exit;
end;
Result := nil;
finally
UnLock;
end;
end;

function TServerSocket.GetClientCount: Integer;
begin
Result := FClients.Count;
end;

function TServerSocket.GetClients(const Index: Integer): TServerClientSocket;
begin
Result := FClients[Index];
end;

procedure TServerSocket.InternalClose;

procedure CloseObject(var Handle: THandle);
begin
if Handle <> 0 then
begin
CloseHandle(Handle);
Handle := 0;
end;
end;

var
I: Integer;
Thread: TThread;
begin
Lock;
try
while FClients.Count > 0 do
TObject(FClients.Last).Free;
FClients.Clear;

for I := FThreads.Count - 1 downto 0 do
begin
Thread := FThreads[I];
PostQueuedCompletionStatus(FCompletionPort, 0, 0, Pointer(SHUTDOWN_FLAG));
Thread.Terminate;
end;
FThreads.Clear;

if FSocket <> INVALID_SOCKET then
begin
Event(seDisconnect);
closesocket(FSocket);
FSocket := INVALID_SOCKET;
end;
FAcceptThread.Terminate;
CloseObject(FCompletionPort);
finally
UnLock;
end;
end;

procedure TServerSocket.InternalOpen;
var
I: Integer;
Thread: TThread;
SystemInfo: TSystemInfo;
begin
Lock;
try
try
FCompletionPort := CreateIoCompletionPort(INVALID_HANDLE_VALUE, 0, 0, 0);
if FCompletionPort = 0 then
raise ESocketError.Create(SysErrorMessage(GetLastError));

Event(seInitIOPort);
GetSystemInfo(SystemInfo);
for I := 0 to SystemInfo.dwNumberOfProcessors * 2 - 1 do
begin
Thread := TWorkerThread.Create(Self);
FThreads.Add(Thread);
end;

FSocket := WSASocket(PF_INET, SOCK_STREAM, 0, nil, 0, WSA_FLAG_OVERLAPPED);
if FSocket = INVALID_SOCKET then
raise ESocketError.Create(SysErrorMessage(GetLastError));
Event(seInitSocket);

FillChar(FAddr, SizeOf(FAddr), 0);
FAddr.sin_family := AF_INET;
FAddr.sin_port := htons(FPort);
FAddr.sin_addr.S_addr := INADDR_ANY;
CheckError(bind(FSocket, @FAddr, SizeOf(FAddr)), 'bind');

Event(seListen);
CheckError(listen(FSocket, SOMAXCONN), 'listen');
FAcceptThread := TAcceptThread.Create(Self);
except
InternalClose;
raise;
end;
finally
UnLock;
end;
end;

function TServerSocket.IsAccept(Socket: TSocket): Boolean;
begin
Result := True;
end;

procedure TServerSocket.RegisterClient(ASocket: TCustomSocket);
begin
Lock;
try
if FClients.IndexOf(ASocket) = -1 then
begin
FClients.Add(ASocket);
WSAAsyncSelect(ASocket.SocketHandle, FHandle, WM_CLIENTSOCKET, FD_CLOSE);
end;
finally
UnLock;
end;
end;

procedure TServerSocket.RemoveClient(ASocket: TCustomSocket);
var
Index: Integer;
begin
Lock;
try
Index := FClients.IndexOf(ASOcket);
if Index <> -1 then
FClients.Delete(Index);
finally
UnLock;
end;
end;

procedure TServerSocket.SetActive(Value: Boolean);
begin
if FActive = Value then Exit;
if Value then
InternalOpen
else
InternalClose;
FActive := Value;
end;

procedure TServerSocket.SetPort(Value: Integer);
begin
if Active then
raise ESocketError.Create('Cann''t change port');
FPort := Value;
end;

procedure TServerSocket.WMClientClose(var Message: TCMSocketMessage);
var
ClientSocket: TCustomSocket;
begin
ClientSocket := FindClientSocket(Message.Socket);
if Assigned(ClientSocket) then
ClientSocket.Free;
end;

procedure TServerSocket.WndProc(var Message: TMessage);
begin
try
Dispatch(Message);
except
if Assigned(ApplicationHandleException) then
ApplicationHandleException(Self);
end;
end;

{ TServerClientSocket }

[shadowfish]

呵呵，完成端口啊，这段代码的问题应该出在iocp单元