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path: root/protocols/VKontakte/src/vk_captcha.cpp
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/*
Copyright (c) 2013-16 Miranda NG project (http://miranda-ng.org)

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation version 2
of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#include "stdafx.h"
#include "resource.h"

/////////////////////////////////////////////////////////////////////////////////////////
// Captcha form

struct CAPTCHA_FORM_PARAMS
{
	HBITMAP bmp;
	int w,h;
	char Result[100];
	CVkProto* proto;
};

static INT_PTR CALLBACK CaptchaFormDlgProc(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
	CAPTCHA_FORM_PARAMS *params = (CAPTCHA_FORM_PARAMS*)GetWindowLongPtr(hwndDlg, GWLP_USERDATA);
	switch (msg) {
	case WM_INITDIALOG: {
		TranslateDialogDefault(hwndDlg);
		SendMessage(hwndDlg, WM_SETICON, ICON_BIG, (LPARAM)IcoLib_GetIconByHandle(GetIconHandle(IDI_KEYS), TRUE));
		SendMessage(hwndDlg, WM_SETICON, ICON_SMALL, (LPARAM)IcoLib_GetIconByHandle(GetIconHandle(IDI_KEYS)));
		params = (CAPTCHA_FORM_PARAMS*)lParam;

		SetDlgItemText(hwndDlg, IDC_INSTRUCTION, TranslateT("Enter the text you see"));
		SetWindowLongPtr(hwndDlg, GWLP_USERDATA, (LONG_PTR)params);

		if (!params->proto)
			EnableWindow(GetDlgItem(hwndDlg,IDOPENBROWSER), false);

		return TRUE;
	}
	case WM_CTLCOLORSTATIC:
		switch (GetWindowLongPtr((HWND)lParam, GWL_ID)) {
		case IDC_WHITERECT:
		case IDC_INSTRUCTION:
		case IDC_TITLE:
			return (INT_PTR)GetStockObject(WHITE_BRUSH);
		}
		return NULL;

	case WM_PAINT:
		if (params && params->proto) {
			PAINTSTRUCT ps;
			HDC hdc, hdcMem;
			RECT rc;

			GetClientRect(hwndDlg, &rc);
			hdc = BeginPaint(hwndDlg, &ps);
			hdcMem = CreateCompatibleDC(hdc);
			HGDIOBJ hOld = SelectObject(hdcMem, params->bmp);

			int y = (rc.bottom + rc.top - params->h) / 2;
			int x = (rc.right + rc.left - params->w) / 2;
			BitBlt(hdc, x, y, params->w, params->h, hdcMem, 0,0, SRCCOPY);
			SelectObject(hdcMem, hOld);
			DeleteDC(hdcMem);

			EndPaint(hwndDlg, &ps);

			if (params->proto->getBool("AlwaysOpenCaptchaInBrowser", false))
				params->proto->ShowCaptchaInBrowser(params->bmp);		
		}
		break;

	case WM_COMMAND:
		switch (LOWORD(wParam)) {
		case IDCANCEL:
			EndDialog(hwndDlg, 0);
			return TRUE;
		
		case IDOPENBROWSER:
			if (params->proto)
				params->proto->ShowCaptchaInBrowser(params->bmp);
			break;

		case IDOK:
			GetDlgItemTextA(hwndDlg, IDC_VALUE, params->Result, _countof(params->Result));
			EndDialog(hwndDlg, 1);
			return TRUE;
		}
		break;

	case WM_CLOSE:
		EndDialog(hwndDlg, 0);
		break;

	case WM_DESTROY:
		IcoLib_ReleaseIcon((HICON)SendMessage(hwndDlg, WM_SETICON, ICON_BIG, 0));
		IcoLib_ReleaseIcon((HICON)SendMessage(hwndDlg, WM_SETICON, ICON_SMALL, 0));
		break;
	}
	return FALSE;
}

bool CVkProto::RunCaptchaForm(LPCSTR szUrl, CMStringA &result)
{
	debugLogA("CVkProto::RunCaptchaForm: reading picture from %s", szUrl);
	result.Empty();

	CAPTCHA_FORM_PARAMS param = { 0 };
	if (getBool("UseCaptchaAssistant", false)) {
		CMStringA szCaptchaAssistant(FORMAT, "http://ca.tiflohelp.ru/?link=%s", ptrA(ExpUrlEncode(szUrl)));
		Utils_OpenUrl(szCaptchaAssistant);
		param.proto = NULL;
	}
	else {
		NETLIBHTTPREQUEST req = { sizeof(req) };
		req.requestType = REQUEST_GET;
		req.szUrl = (LPSTR)szUrl;
		req.flags = VK_NODUMPHEADERS;

		NETLIBHTTPREQUEST *reply = (NETLIBHTTPREQUEST*)CallService(MS_NETLIB_HTTPTRANSACTION, (WPARAM)m_hNetlibUser, (LPARAM)&req);
		if (reply == NULL)
			return false;

		if (reply->resultCode != 200) {
			debugLogA("CVkProto::RunCaptchaForm: failed with code %d", reply->resultCode);
			return false;
		}


		IMGSRVC_MEMIO memio = { 0 };
		memio.iLen = reply->dataLength;
		memio.pBuf = reply->pData;
		memio.fif = FIF_UNKNOWN; /* detect */
		param.bmp = (HBITMAP)CallService(MS_IMG_LOADFROMMEM, (WPARAM)&memio);

		BITMAP bmp = { 0 };
		GetObject(param.bmp, sizeof(bmp), &bmp);
		param.w = bmp.bmWidth;
		param.h = bmp.bmHeight;
		param.proto = this;

	}

	int res = DialogBoxParam(hInst, MAKEINTRESOURCE(IDD_CAPTCHAFORM), NULL, CaptchaFormDlgProc, (LPARAM)&param);
	if (res == 0)
		return false;

	debugLogA("CVkProto::RunCaptchaForm: user entered text %s", param.Result);
	result = param.Result;
	return true;
}

/////////////////////////////////////////////////////////////////////////////////////////
// fill a request from JSON

bool CVkProto::ApplyCaptcha(AsyncHttpRequest *pReq, const JSONNode &jnErrorNode)
{
	debugLogA("CVkProto::ApplyCaptcha");
	if (!IsOnline())
		return false;

	CMStringA szUrl(jnErrorNode["captcha_img"].as_mstring());
	CMStringA szSid(jnErrorNode["captcha_sid"].as_mstring());

	if (szUrl.IsEmpty() || szSid.IsEmpty())
		return false;

	CMStringA userReply;
	if (!RunCaptchaForm(szUrl, userReply))
		return false;

	pReq << CHAR_PARAM("captcha_sid", szSid) << CHAR_PARAM("captcha_key", userReply.GetString());
	pReq->bNeedsRestart = true;
	return true;
}