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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#include "check_version.h"
#include <zen/string_tools.h>
#include <zen/i18n.h>
#include <zen/utf.h>
#include <wx/timer.h>
#include <wx/utils.h>
#include <wx+/popup_dlg.h>
#include "../version/version.h"
#include <zen/scope_guard.h>
#ifdef ZEN_WIN
#include <zen/win.h> //tame wininet include
#include <wininet.h>
#elif defined ZEN_LINUX || defined ZEN_MAC
#include <wx/protocol/http.h>
#include <wx/sstream.h>
#endif
using namespace zen;
namespace
{
#ifdef ZEN_WIN
class InternetConnectionError {};
class WinInetAccess //using IE proxy settings! :)
{
public:
WinInetAccess(const wchar_t* url) //throw InternetConnectionError (if url cannot be reached; no need to also call readBytes())
{
//::InternetAttemptConnect(0) -> not working as expected: succeeds even when there is no internet connection!
hInternet = ::InternetOpen(L"FreeFileSync", //_In_ LPCTSTR lpszAgent,
INTERNET_OPEN_TYPE_PRECONFIG, //_In_ DWORD dwAccessType,
nullptr, //_In_ LPCTSTR lpszProxyName,
nullptr, //_In_ LPCTSTR lpszProxyBypass,
0); //_In_ DWORD dwFlags
if (!hInternet)
throw InternetConnectionError();
zen::ScopeGuard guardInternet = zen::makeGuard([&] { ::InternetCloseHandle(hInternet); });
hRequest = ::InternetOpenUrl(hInternet, //_In_ HINTERNET hInternet,
url, //_In_ LPCTSTR lpszUrl,
nullptr, //_In_ LPCTSTR lpszHeaders,
0, //_In_ DWORD dwHeadersLength,
INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_RELOAD | INTERNET_FLAG_NO_UI, //_In_ DWORD dwFlags,
0); //_In_ DWORD_PTR dwContext
if (!hRequest) //won't fail due to unreachable url here! There is no substitute for HTTP_QUERY_STATUS_CODE!!!
throw InternetConnectionError();
zen::ScopeGuard guardRequest = zen::makeGuard([&] { ::InternetCloseHandle(hRequest); });
DWORD statusCode = 0;
DWORD bufferLength = sizeof(statusCode);
if (!::HttpQueryInfo(hRequest, //_In_ HINTERNET hRequest,
HTTP_QUERY_STATUS_CODE | HTTP_QUERY_FLAG_NUMBER, //_In_ DWORD dwInfoLevel,
&statusCode, //_Inout_ LPVOID lpvBuffer,
&bufferLength, //_Inout_ LPDWORD lpdwBufferLength,
nullptr)) //_Inout_ LPDWORD lpdwIndex
throw InternetConnectionError();
if (statusCode != HTTP_STATUS_OK)
throw InternetConnectionError(); //e.g. 404 - HTTP_STATUS_NOT_FOUND
guardRequest .dismiss();
guardInternet.dismiss();
}
~WinInetAccess()
{
::InternetCloseHandle(hRequest);
::InternetCloseHandle(hInternet);
}
template <class OutputIterator>
OutputIterator readBytes(OutputIterator result) //throw InternetConnectionError
{
//internet says "HttpQueryInfo() + HTTP_QUERY_CONTENT_LENGTH" not supported by all http servers...
const DWORD bufferSize = 64 * 1024;
std::vector<char> buffer(bufferSize);
for (;;)
{
DWORD bytesRead = 0;
if (!::InternetReadFile(hRequest, //_In_ HINTERNET hFile,
&buffer[0], //_Out_ LPVOID lpBuffer,
bufferSize, //_In_ DWORD dwNumberOfBytesToRead,
&bytesRead)) //_Out_ LPDWORD lpdwNumberOfBytesRead
throw InternetConnectionError();
if (bytesRead == 0)
return result;
result = std::copy(buffer.begin(), buffer.begin() + bytesRead, result);
}
}
private:
HINTERNET hInternet;
HINTERNET hRequest;
};
inline
bool canAccessUrl(const wchar_t* url) //throw ()
{
try
{
(void)WinInetAccess(url); //throw InternetConnectionError
return true;
}
catch (const InternetConnectionError&) { return false; }
}
template <class OutputIterator> inline
OutputIterator readBytesUrl(const wchar_t* url, OutputIterator result) //throw InternetConnectionError
{
return WinInetAccess(url).readBytes(result); //throw InternetConnectionError
}
#endif
enum GetVerResult
{
GET_VER_SUCCESS,
GET_VER_NO_CONNECTION, //no internet connection or just Sourceforge down?
GET_VER_PAGE_NOT_FOUND //version file seems to have moved! => trigger an update!
};
GetVerResult getOnlineVersion(wxString& version) //empty string on error;
{
#ifdef ZEN_WIN
//internet access supporting proxy connections
std::vector<char> output;
try
{
readBytesUrl(L"http://freefilesync.sourceforge.net/latest_version.txt", std::back_inserter(output)); //throw InternetConnectionError
}
catch (const InternetConnectionError&)
{
return canAccessUrl(L"http://sourceforge.net/") ? GET_VER_PAGE_NOT_FOUND : GET_VER_NO_CONNECTION;
}
output.push_back('\0');
version = utfCvrtTo<wxString>(&output[0]);
return GET_VER_SUCCESS;
#elif defined ZEN_LINUX || defined ZEN_MAC
wxWindowDisabler dummy;
auto getStringFromUrl = [](const wxString& server, const wxString& page, int timeout, wxString* output) -> bool //true on successful connection
{
wxHTTP webAccess;
webAccess.SetHeader(L"content-type", L"text/html; charset=utf-8");
webAccess.SetTimeout(timeout); //default: 10 minutes(WTF are these wxWidgets people thinking???)...
if (webAccess.Connect(server)) //will *not* fail for non-reachable url here!
{
//wxApp::IsMainLoopRunning(); // should return true
std::unique_ptr<wxInputStream> httpStream(webAccess.GetInputStream(page));
//must be deleted BEFORE webAccess is closed
if (httpStream && webAccess.GetError() == wxPROTO_NOERR)
{
if (output)
{
output->clear();
wxStringOutputStream outStream(output);
httpStream->Read(outStream);
}
return true;
}
}
return false;
};
if (getStringFromUrl(L"freefilesync.sourceforge.net", L"/latest_version.txt", 5, &version))
return GET_VER_SUCCESS;
const bool canConnectToSf = getStringFromUrl(L"sourceforge.net", L"/", 1, nullptr);
return canConnectToSf ? GET_VER_PAGE_NOT_FOUND : GET_VER_NO_CONNECTION;
#endif
}
const wchar_t VERSION_SEP = L'.';
std::vector<size_t> parseVersion(const wxString& version)
{
std::vector<wxString> digits = split(version, VERSION_SEP);
std::vector<size_t> output;
std::transform(digits.begin(), digits.end(), std::back_inserter(output), [&](const wxString& d) { return stringTo<size_t>(d); });
return output;
}
bool haveNewerVersion(const wxString& onlineVersion)
{
std::vector<size_t> current = parseVersion(zen::currentVersion);
std::vector<size_t> online = parseVersion(onlineVersion);
if (online.empty() || online[0] == 0) //online version may be "This website has been moved..." In this case better check for an update
return true;
return std::lexicographical_compare(current.begin(), current.end(),
online .begin(), online .end());
}
}
void zen::checkForUpdateNow(wxWindow* parent)
{
wxString onlineVersion;
switch (getOnlineVersion(onlineVersion))
{
case GET_VER_SUCCESS:
if (haveNewerVersion(onlineVersion))
{
switch (showConfirmationDialog(parent, DialogInfoType::INFO, PopupDialogCfg().
setTitle(_("Check for Program Updates")).
setMainInstructions(_("A new version of FreeFileSync is available:") + L" " + onlineVersion + L"\n\n" + _("Download now?")),
_("&Download")))
{
case ConfirmationButton::DO_IT:
wxLaunchDefaultBrowser(L"http://freefilesync.sourceforge.net/get_latest.php");
break;
case ConfirmationButton::CANCEL:
break;
}
}
else
showNotificationDialog(parent, DialogInfoType::INFO, PopupDialogCfg().
setTitle(_("Check for Program Updates")).
setMainInstructions(_("FreeFileSync is up to date.")));
break;
case GET_VER_NO_CONNECTION:
showNotificationDialog(parent, DialogInfoType::ERROR2, PopupDialogCfg().
setTitle(("Check for Program Updates")).
setMainInstructions(_("Unable to connect to sourceforge.net.")));
break;
case GET_VER_PAGE_NOT_FOUND:
switch (showConfirmationDialog(parent, DialogInfoType::ERROR2, PopupDialogCfg().
setTitle(_("Check for Program Updates")).
setMainInstructions(_("Cannot find current FreeFileSync version number online. Do you want to check manually?")),
_("&Check")))
{
case ConfirmationButton::DO_IT:
wxLaunchDefaultBrowser(L"http://freefilesync.sourceforge.net/");
break;
case ConfirmationButton::CANCEL:
break;
}
break;
}
}
void zen::checkForUpdatePeriodically(wxWindow* parent, long& lastUpdateCheck, const std::function<void()>& onBeforeInternetAccess)
{
if (lastUpdateCheck != -1)
{
if (wxGetLocalTime() >= lastUpdateCheck + 7 * 24 * 3600) //check weekly
{
onBeforeInternetAccess(); //notify client before (potentially) blocking some time
wxString onlineVersion;
switch (getOnlineVersion(onlineVersion))
{
case GET_VER_SUCCESS:
lastUpdateCheck = wxGetLocalTime();
if (haveNewerVersion(onlineVersion))
{
switch (showConfirmationDialog(parent, DialogInfoType::INFO, PopupDialogCfg().
setTitle(_("Check for Program Updates")).
setMainInstructions(_("A new version of FreeFileSync is available:") + L" " + onlineVersion + L"\n\n" + _("Download now?")),
_("&Download")))
{
case ConfirmationButton::DO_IT:
wxLaunchDefaultBrowser(L"http://freefilesync.sourceforge.net/get_latest.php");
break;
case ConfirmationButton::CANCEL:
break;
}
}
break;
case GET_VER_NO_CONNECTION:
break; //ignore this error
case GET_VER_PAGE_NOT_FOUND:
switch (showConfirmationDialog(parent, DialogInfoType::ERROR2, PopupDialogCfg().
setTitle(_("Check for Program Updates")).
setMainInstructions(_("Cannot find current FreeFileSync version number online. Do you want to check manually?")),
_("&Check")))
{
case ConfirmationButton::DO_IT:
wxLaunchDefaultBrowser(L"http://freefilesync.sourceforge.net/");
break;
case ConfirmationButton::CANCEL:
break;
}
break;
}
}
}
}
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