ftpcli.pas

灰鸽子1.23源码,,,,,,,

        Result := -1;
end;


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{ Step over blank spaces                                                    }
function StpBlk(Data : PChar) : PChar;
begin
    Result := Data;
    if Result <> nil then begin
        while (Result^ <> #0) and (Result^ in [' ', #9, #13, #10]) do
            Inc(Result);
    end;
end;


{* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *}
function GetInteger(Data : PChar; var Number : LongInt) : PChar;
var
    bSign : Boolean;
begin
    Number := 0;
    Result := StpBlk(Data);

    if (Result = nil) then
        Exit;

    { Remember the sign }
    if Result^ in ['-', '+'] then begin
        bSign := (Result^ = '-');
        Inc(Result);
    end
    else
        bSign  := FALSE;

    { Convert any number }
    while (Result^ <> #0) and (Result^ in ['0'..'9']) do begin
        Number := Number * 10 + ord(Result^) - ord('0');
        Inc(Result);
    end;

    { Correct for sign }
    if bSign then
        Number := -Number;
end;


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function GetQuotedString(Data : PChar; var Dst : String) : PChar;
begin
    Dst := '';
    Result := StpBlk(Data);

    if (Result = nil) then
        Exit;

    if Result^ <> '"' then
        Exit;
    Inc(Result);

    while Result^ <> #0 do begin
        if Result^ <> '"' then
            Dst := Dst + Result^
        else begin
            Inc(Result);
            if Result^ <> '"' then
                Break;
            Dst := Dst + Result^;
        end;
        Inc(Result);
    end;
end;


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{* *                                                                     * *}
{* *                            TCustomFtpCli                            * *}
{* *                                                                     * *}
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{$IFDEF NOFORMS}
{ This function is a callback function. It means that it is called by       }
{ windows. This is the very low level message handler procedure setup to    }
{ handle the message sent by windows (winsock) to handle messages.          }
function FtpCliWindowProc(
    ahWnd   : HWND;
    auMsg   : Integer;
    awParam : WPARAM;
    alParam : LPARAM): Integer; stdcall;
var
    Obj    : TObject;
    MsgRec : TMessage;
begin
    { At window creation asked windows to store a pointer to our object     }
    Obj := TObject(GetWindowLong(ahWnd, 0));

    { If the pointer doesn't represent a TCustomFtpCli, just call the default procedure}
    if not (Obj is TCustomFtpCli) then
        Result := DefWindowProc(ahWnd, auMsg, awParam, alParam)
    else begin
        { Delphi use a TMessage type to pass parameter to his own kind of   }
        { windows procedure. So we are doing the same...                    }
        MsgRec.Msg    := auMsg;
        MsgRec.wParam := awParam;
        MsgRec.lParam := alParam;
        { May be a try/except around next line is needed. Not sure ! }
        TCustomFtpCli(Obj).WndProc(MsgRec);
        Result := MsgRec.Result;
    end;
end;
{$ENDIF}


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function TCustomFtpCli.FtpCliAllocateHWnd(Method: TWndMethod) : HWND;
begin
{$IFDEF NOFORMS}
    Result := XSocketAllocateHWnd(Self);
    SetWindowLong(Result, GWL_WNDPROC, LongInt(@FtpCliWindowProc));
{$ELSE}
     Result := WSocket.AllocateHWnd(Method);
{$ENDIF}
end;


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procedure TCustomFtpCli.FtpCliDeallocateHWnd(WHandle : HWND);
begin
{$IFDEF NOFORMS}
    XSocketDeallocateHWnd(WHandle);
{$ELSE}
    WSocket.DeallocateHWnd(WHandle);
{$ENDIF}
end;


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constructor TCustomFtpCli.Create(AOwner: TComponent);
begin
    inherited Create(AOwner);

    FWindowHandle  := FtpCliAllocateHWnd(WndProc);
    FOnDisplay     := nil;
    FOnDisplayFile := nil;
    FType          := 'I';
    FPort          := 'ftp';
    FProxyPort     := 'ftp';
    FState         := ftpReady;
    FShareMode     := fmShareExclusive;
    FConnectionType:= ftpDirect;
    FProxyServer   := '';    { Should Socks properties be set to '' as well? }
    FOptions       := [ftpAcceptLF];
    FLocalAddr     := '0.0.0.0'; {bb}    
    FControlSocket := TWSocket.Create(Self);
    FControlSocket.OnSessionConnected := ControlSocketSessionConnected;
    FControlSocket.OnDataAvailable    := ControlSocketDataAvailable;
    FControlSocket.OnSessionClosed    := ControlSocketSessionClosed;
    FControlSocket.OnDnsLookupDone    := ControlSocketDnsLookupDone;
    FDataSocket    := TWSocket.Create(Self);
    FStreamFlag    := False;
end;


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destructor TCustomFtpCli.Destroy;
begin
    FtpCliDeallocateHWnd(FWindowHandle);
    { Be sure to have LocalStream closed }
{    FStreamFlag := FALSE; }
    DestroyLocalStream;
    inherited Destroy;
end;


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procedure TCustomFtpCli.WndProc(var MsgRec: TMessage);
begin
    try
         with MsgRec do begin
             case Msg of
             WM_FTP_REQUEST_DONE : WMFtpRequestDone(MsgRec);
             WM_FTP_SENDDATA     : WMFtpSendData(MsgRec);
             else
                 Result := DefWindowProc(Handle, Msg, wParam, lParam);
             end;
        end;
    except
        on E:Exception do
            HandleBackGroundException(E);
    end;
end;


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{ All exceptions *MUST* be handled. If an exception is not handled, the     }
{ application will be shut down !                                           }
procedure TCustomFtpCli.HandleBackGroundException(E: Exception);
var
    CanAbort : Boolean;
begin
    CanAbort := TRUE;
    { First call the error event handler, if any }
    if Assigned(FOnBgException) then begin
        try
            FOnBgException(Self, E, CanAbort);
        except
        end;
    end;
    { Then abort the component }
    if CanAbort then begin
        try
            Abort;
        except
        end;
    end;
end;


{* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *}
procedure TCustomFtpCli.WMFtpRequestDone(var msg: TMessage);
begin
    if Assigned(FOnRequestDone) then
        FOnRequestDone(Self, FRequestType, Msg.LParam);
end;


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procedure TCustomFtpCli.Notification(AComponent: TComponent; Operation: TOperation);
begin
    inherited Notification(AComponent, Operation);
    if Operation = opRemove then begin
        if AComponent = FControlSocket then
            FControlSocket := nil
        else if AComponent = FDataSocket then
            FDataSocket := nil;
    end;
end;


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procedure TCustomFtpCli.SetErrorMessage;
begin
    if FErrorMessage = '' then
        FErrorMessage := FLastResponse;
end;


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procedure TCustomFtpCli.DestroyLocalStream;
begin
    if Assigned(FLocalStream) and (FStreamFlag = FALSE) then begin
        FLocalStream.Destroy;
        FLocalStream := nil;
    end;
end;


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procedure TCustomFtpCli.SetLocalFileName(FileName: String);
begin
    FLocalFileName := FileName;
    if FileName <> '' then
        FStreamFlag := FALSE;
end;


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procedure TCustomFtpCli.SetLocalStream(Stream: TStream);
begin
    FLocalStream := Stream;
    FStreamFlag  := (Stream <> nil);
    if FStreamFlag then
        FLocalFileName := '';
end;


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procedure TCustomFtpCli.TriggerDisplay(Msg : String);
begin
    if Assigned(FOnDisplay) then
        FOnDisplay(Self, Msg);
end;


{* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *}
procedure TCustomFtpCli.TriggerDisplayFile(Msg : String);
begin
    if Assigned(FOnDisplayFile) then
        FOnDisplayFile(Self, Msg);
end;


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procedure TCustomFtpCli.TriggerError(Msg : String);
begin
    if Assigned(FOnError) then
        FOnError(Self, Msg);
end;


{* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *}
procedure TCustomFtpCli.DisplayLastResponse;
begin
     TriggerDisplay('< ' + FLastResponse);
end;


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procedure TCustomFtpCli.StateChange(NewState : TFtpState);
begin
    if FState <> NewState then begin