适用于iOS和Android的QT C ++中的HTTPS请求

Question

I've been trying to find a way to integrate twitter to my cross platform qt project. What I want to achieve is nothing fancy. I just want to be able to use the Twitter API to fetch some tweets with a certain hashtag using app only credentials. In order to do that, I had to get a bearer token using their oauth2 authentication process. And according to their development page, SSL is required. https://dev.twitter.com/oauth/application-only

I've read that in QT, I can use QNetworkAccessManager to send QNetworkRequests but I can't seem to make it work. I get an error: "Protocol \\"\\" is unknown"

I've tried ready a lot of posts but I couldn't get what I want. I would appreciate all the help I could get to make this possible. If anyone can point me to the right direction/tutorial please do so:

Attached is my sample code:

.pro

QT += qml quick network

setup code:

m_networkManager = new QNetworkAccessManager(this);
connect(m_networkManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(requestFinished(QNetworkReply*)));

request code:

QJsonObject params;
params.insert("grant_type","client_credentials");

QUrl url("https://api.twitter.com/oauth2/token");
url.setHost("api.twitter.com");

QNetworkRequest request;
QString authorizationKey =  m_consumerKey + ":" + m_consumerSecret;
request.setRawHeader("Authorization", "Basic "+ authorizationKey.toUtf8().toBase64());
request.setRawHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
m_networkManager->post(request, QJsonDocument(params).toJson());

and finally my callback:

void NetworkClass::requestFinished(QNetworkReply *reply)
{
    cout << "header size: " + reply->readBufferSize();
    if (reply->error() == QNetworkReply::NoError) {
        //success
        QByteArray response_data = reply->readAll();
        QJsonDocument json = QJsonDocument::fromJson(response_data);
        cout <<"result: " << response_data.toStdString();
    }
    else {
        //failure
        qDebug() << "Failure" <<reply->errorString();
    }
    reply->deleteLater();
}

Note: I'm not very good with SSL and such. I'm still a new to this. Maybe that's why I feel so lost right now. Please please help me. Thanks.

UPDATE
@dutt pointed out that I forgot to set the url to the request. Yey! Finally I received a reply. However, I got this reply:
"Error transferring https://api.twitter.com/oauth2/token - server replied: Forbidden"

Answer 1

如果您可以使用Qt 5.8，则下一步可能会有所帮助： http : //blog.qt.io/blog/2017/01/25/connecting-qt-application-google-services-using-oauth-2-0/和示例https ：//github.com/qt/qtnetworkauth/tree/5.8/examples/oauth/twittertimeline （未经我测试，但为官方示例）。