WINSOCK

Visual C++ 6.0 を起動してプロジェクトを作成

「プロジェクト名」 : WINSOCK

1) Win32 Application を指定。
2) 標準的な "Hello World!" アプリケーションを選択

Hello World! が邪魔なので削除

削除前

		case WM_PAINT:
			hdc = BeginPaint (hWnd, &ps);
			// TODO: この位置に描画用のコードを追加してください...
			RECT rt;
			GetClientRect( hWnd, &rt );
			DrawText( hdc, szHello, strlen(szHello), &rt, DT_CENTER );
			EndPaint( hWnd, &ps );
			break;

削除後

		case WM_PAINT:
			hdc = BeginPaint (hWnd, &ps);
			// TODO: この位置に描画用のコードを追加してください...
			EndPaint( hWnd, &ps );
			break;

データ表示用のリストボックスを追加

追加前

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if( !hWnd ) 
   {
      return FALSE;
   }

追加後

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if( !hWnd ) 
   {
      return FALSE;
   }

   DWORD	style;

   style = WS_CHILD | WS_VISIBLE | WS_BORDER | WS_VSCROLL | 
		LBS_DISABLENOSCROLL | LBS_EXTENDEDSEL | LBS_MULTIPLESEL | LBS_NOINTEGRALHEIGHT | LBS_NOTIFY;

   RECT	Rect;

   GetClientRect( hWnd, (LPRECT)&Rect);
   hListBox = CreateWindow( "listbox",
		NULL, style, 0, 0, Rect.right-Rect.left, Rect.bottom-Rect.top, hWnd, NULL, hInst, NULL);
   if ( !hListBox ) {
   	DestroyWindow( hWnd );
   	return FALSE;
   }

[グローバル変数に追加 ]

HWND		hListBox;
char		szFile[MAX_PATH+1];

WndProc に WM_SIZE を追加

case WM_SIZE:
	MoveWindow( hListBox, 0, 0, LOWORD(lParam), HIWORD(lParam), TRUE);
	break;

ダイアログを作成

作ったダイアログをメニューから呼べるようにする

1) メニユー作成

2) 宣言追加

LRESULT CALLBACK	HttpGet( HWND, UINT, WPARAM, LPARAM );

3) 呼び出し部分追加

case IDM_ABOUT:
   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
   break;
case IDM_HTTPGET:
   DialogBox(hInst, (LPCTSTR)IDD_DIALOG1, hWnd, (DLGPROC)HttpGet);
   break;

4) Call Back 追加

LRESULT CALLBACK HttpGet( HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam )
{
	switch( message )
	{
		case WM_INITDIALOG:
				return TRUE;

		case WM_COMMAND:
			if( LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL ) 
			{
				EndDialog(hDlg, LOWORD(wParam));
				return TRUE;
			}
			break;
	}
    return FALSE;
}

ソケット部分を追加

1) ヘッダファイル追加

#include <winsock2.h>

2) 宣言追加

void	HttpGetProc( HWND );

3) HttpGet を変更

Case WM_COMMAND:
	if( LOWORD(wParam) == IDOK ) 
	{
		HttpGetProc( hDlg );
		EndDialog(hDlg, LOWORD(wParam));
		return TRUE;
	}
	if( LOWORD(wParam) == IDCANCEL ) 
	{
		EndDialog(hDlg, LOWORD(wParam));
		return TRUE;
	}
	break;

4) HttpGetProc を作成

void
HttpGetProc( HWND hDlg )
{
	SOCKET	curSocket;
	int	ret;
	char	szEdit[4096+1];
	char	szBuff[4096+1];

	// リストボックスクリア
	SendMessage( hListBox, LB_RESETCONTENT, 0, 0L );

	WORD		wVersion;
	int			err;
	WSADATA		wsaData;

	// API 初期化
	wVersion = MAKEWORD( (BYTE)2, (BYTE)2 );
	err = WSAStartup( wVersion, &wsaData );
	if ( err != 0 ) {
		lstrcpy( szBuff, "WSAStartup ERROR" );
		SendMessage( hListBox, LB_ADDSTRING, 0, (LPARAM)(LPCSTR)szBuff );
		return;
	}

	curSocket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );	// SOCKET 作成
	if ( curSocket == INVALID_SOCKET ) {
		lstrcpy( szBuff, "Socket can't create" );
		SendMessage( hListBox, LB_ADDSTRING, 0, (LPARAM)(LPCSTR)szBuff );
		WSACleanup();
		return;
	}

	GetDlgItemText(	hDlg, IDC_EDIT1, szBuff, 4096 );

	hostent	*hosts;

	hosts = gethostbyname( szBuff );
	if ( hosts == NULL ) {
		lstrcpy( szBuff, "gethostbyname ERROR" );
		SendMessage( hListBox, LB_ADDSTRING, 0, (LPARAM)(LPCSTR)szBuff );
		shutdown( curSocket, 2 );
		WSACleanup();
		return;
	}

	SOCKADDR_IN	Sad;

	Sad.sin_family	= AF_INET;
	Sad.sin_port	= htons( 80 );
	Sad.sin_addr	= *((LPIN_ADDR)*(hosts->h_addr_list));

	ret = connect( curSocket, (LPSOCKADDR)&Sad, sizeof( SOCKADDR_IN ) );		// 接続
	if ( ret == SOCKET_ERROR ) {
		lstrcpy( szBuff, "connect ERROR" );
		SendMessage( hListBox, LB_ADDSTRING, 0, (LPARAM)(LPCSTR)szBuff );
		shutdown( curSocket, 2 );
		WSACleanup();
		return;
	}

	GetDlgItemText( hDlg, IDC_EDIT2, szEdit, 4096 );
	wsprintf( szBuff, "GET %s HTTP/1.0\n\n", szEdit );
	ret = send( curSocket, szBuff, lstrlen( szBuff ), 0 );

	int timeout = 60000;   // タイムアウト値をミリ秒単位で指定

	setsockopt( curSocket, SOL_SOCKET, SO_RCVTIMEO, (char*)&timeout, sizeof(timeout));

	int i,out;

	out = 0;
	while( 1 ) {

		ret = recv( curSocket, szBuff, sizeof( szBuff )-1, 0 );
		if ( ret < 0 ) {
			lstrcpy( szBuff, "recv ERROR" );
			SendMessage( hListBox, LB_ADDSTRING, 0, (LPARAM)(LPCSTR)szBuff );
			shutdown( curSocket, 2 );
			closesocket( curSocket );
			WSACleanup();
			return;
		}
		if ( ret == 0 ) {
			lstrcpy( szBuff, "-----------------------------end" );
			SendMessage( hListBox, LB_ADDSTRING, 0, (LPARAM)(LPCSTR)szBuff );
			break;
		}

		for( i = 0; i < ret; i++ ) {
			if ( szBuff[i] == 0x0d || szBuff[i] == 0x0a ) {
				szEdit[out] = 0x00;
				SendMessage( hListBox, LB_ADDSTRING, 0, (LPARAM)(LPCSTR)szEdit );
				out = 0;
				if ( szBuff[i] == 0x0d && szBuff[i+1] == 0x0a ) {
					i++;
				}
			}
			else {
				if ( szBuff[i] == 0x09 ) {
					szEdit[out] = 0x20;
					out++;
					szEdit[out] = 0x20;
					out++;
					szEdit[out] = 0x20;
					out++;
					szEdit[out] = 0x20;
				}
				else {
					szEdit[out] = szBuff[i];
				}
				out++;
			}
		}

	}
	if ( out != 0 ) {
		szEdit[out] = 0x00;
		SendMessage( hListBox, LB_ADDSTRING, 0, (LPARAM)(LPCSTR)szEdit );
	}

	shutdown( curSocket, 2 );
	closesocket( curSocket );

	WSACleanup();		// API END

}