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oauth2.cpp
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oauth2.cpp
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#include <QApplication>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QMessageBox>
#include <QSettings>
#include <QTimer>
#include <QJson/Parser>
#include "logindialog.h"
#include "oauth2.h"
OAuth2::OAuth2(QWidget* parent)
{
m_strEndPoint = "https://accounts.google.com/o/oauth2/auth";
m_strScope = "https://www.googleapis.com/auth/latitude.all.best"
"+https://www.googleapis.com/auth/userinfo.email"
; //Access to Latitude service
m_strClientID = "YOUR_CLIENT_ID_HERE";
m_strClientSecret = "YOUR_CLIENT_SECRET_HERE";
m_strRedirectURI = "YOUR_REDIRECT_URI_HERE";
m_apiKeyGeocoding = "YOUR_API_KEY_HERE";
m_pLoginDialog = NULL;
m_pParent = parent;
m_pSettings = NULL;
m_pNetworkAccessManager = new QNetworkAccessManager(this);
connect(m_pNetworkAccessManager, SIGNAL(finished(QNetworkReply*)),
this, SLOT(replyFinished(QNetworkReply*)));
}
QString OAuth2::geocodingKey()
{
return m_apiKeyGeocoding;
}
QString OAuth2::loginUrl()
{
QString str = QString("%1?client_id=%2&redirect_uri=%3&response_type=token&scope=%4")
.arg(m_strEndPoint,m_strClientID,m_strRedirectURI,m_strScope);
return str;
}
QString OAuth2::permanentLoginUrl()
{
QString str = QString("%1?client_id=%2&redirect_uri=%3&response_type=code&scope=%4&approval_prompt=force&access_type=offline").
arg(m_strEndPoint,m_strClientID,m_strRedirectURI,m_strScope);
return str;
}
bool OAuth2::isAuthorized()
{
return m_strAccessToken != "";
}
void OAuth2::startLogin(bool bForce)
{
if(m_strClientID == "YOUR_CLIENT_ID_HERE" || m_strRedirectURI == "YOUR_REDIRECT_URI_HERE" ||
m_strClientSecret == "YOUR_CLIENT_SECRET_HERE")
{
QMessageBox::warning(m_pParent, "Warning",
"To work with application you need to register your own application in <b>Google</b>.\n"
"Learn more from <a href='http://code.google.com/p/qt-google-latitude/wiki/HowToRegisterYourApplicationInGoogle'>here</a>");
return;
}
if(m_strRefreshToken.isEmpty() || bForce)
{
if (m_pLoginDialog != NULL) {
delete m_pLoginDialog;
}
m_pLoginDialog = new LoginDialog(m_pParent);
connect(m_pLoginDialog, SIGNAL(accessTokenObtained()), this, SLOT(accessTokenObtained()));
connect(m_pLoginDialog, SIGNAL(codeObtained()), this, SLOT(codeObtained()));
m_pLoginDialog->setLoginUrl(permanentLoginUrl());
m_pLoginDialog->show();
}
else
{
getAccessTokenFromRefreshToken();
}
}
/*! \brief This slot called only form Google Login dialog in case of response_type=token
*
*/
void OAuth2::accessTokenObtained()
{
m_strAccessToken = m_pLoginDialog->accessToken();
emit loginDone();
if (m_pLoginDialog != NULL) {
m_pLoginDialog->deleteLater();
m_pLoginDialog = NULL;
}
}
/*! \brief This slot called only form Google Login dialog in case of response_type=code
*
*/
void OAuth2::codeObtained()
{
m_strCode = m_pLoginDialog->code();
QUrl url("https://accounts.google.com/o/oauth2/token");
QNetworkRequest request;
request.setUrl(url);
request.setRawHeader("Content-Type", "application/x-www-form-urlencoded");
QString str = "client_id=" + m_strClientID;
str += "&redirect_uri=" + m_strRedirectURI;
str += "&client_secret=" + m_strClientSecret;
str += "&grant_type=authorization_code";
str += "&code=" + m_strCode;
QByteArray params = str.toLatin1();
m_pNetworkAccessManager->post(request, params);
}
void OAuth2::replyFinished(QNetworkReply* reply)
{
QString json = reply->readAll();
QJson::Parser parser;
bool ok;
// json is a QString containing the data to convert
QVariant result = parser.parse (json.toLatin1(), &ok);
if( !ok )
{
emit sigErrorOccured(QString("Cannot convert to QJson object: %1").arg(json));
return;
}
if (result.toMap().contains("error")) {
emit sigErrorOccured(result.toMap()["error"].toString());
return;
}
QString str = result.toMap()["refresh_token"].toString();
if (!str.isEmpty() && str != m_strRefreshToken) {
m_strRefreshToken = str;
if (m_pSettings != NULL) {
m_pSettings->setValue("refresh_token",m_strRefreshToken);
}
}
QString prevAccessToken = m_strAccessToken;
str = result.toMap()["access_token"].toString();
int expires_in = result.toMap()["expires_in"].toInt();
if(!str.isEmpty())
{
//After 55 min update access_token
QTimer::singleShot ( (expires_in - 120)*1000, this, SLOT(getAccessTokenFromRefreshToken()) );
}
if(!str.isEmpty() && str != prevAccessToken)
{
m_strAccessToken = str;
if (m_pSettings != NULL) {
m_pSettings->setValue("access_token",m_strAccessToken);
}
emit loginDone();
}
if (m_pLoginDialog != NULL) {
delete m_pLoginDialog;
m_pLoginDialog = NULL;
}
}
void OAuth2::getAccessTokenFromRefreshToken()
{
QUrl url("https://accounts.google.com/o/oauth2/token");
QNetworkRequest request;
request.setUrl(url);
request.setRawHeader("Content-Type", "application/x-www-form-urlencoded");
QString params = "client_id=" + m_strClientID;
params += "&client_secret=" + m_strClientSecret;
params += "&grant_type=refresh_token";
params += "&refresh_token=" + m_strRefreshToken;
m_pNetworkAccessManager->post(request, params.toLatin1());
}