POST-Request with JSON Data over HTTPS Connection with Qt5

Question

我正在尝试通过Qt5通过HTTPS连接向Web-API发送POST请求，但我不断收到以下错误消息：

失败"下载 https：//.../login 时出错 - 服务器回复：错误请求"

回复： "{"error_tag": "ARGUMENT_MISSING", "error_code": 19, "error_extra": {"argument": "email"}, "error": "Required argument is missing"}"

似乎HTTPS连接有效，但是POST请求有问题...

    void connection::sendLoginData(){
        QUrl url = QString("https://.../login");
        QNetworkRequest req(url);
//Creating the JSON-Data
        QJsonDocument json;
        QJsonObject data;
        data["email"] = QString("[e-mail]");
        data["password"] = QString("---");
        json.setObject(data);
        QByteArray jsonPost = QJsonDocument(data).toJson();
        req.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/json; charset=utf-8"));
        req.setHeader(QNetworkRequest::ContentLengthHeader, QByteArray::number(jsonPost.size()));
//Sending the Request
        QNetworkReply *reply = manager->post(req,jsonPost);
    // Connection via HTTPS
        QFile certFile(SSLCERTIFICATE);
        certFile.open(QIODevice::ReadOnly);
        QSslCertificate cert(&certFile, QSsl::Pem);
        QSslSocket * sslSocket = new QSslSocket(this);
        sslSocket->addCaCertificate(cert);
        QSslConfiguration configuration = sslSocket->sslConfiguration();
        configuration.setProtocol(QSsl::TlsV1_2);
        sslSocket->setSslConfiguration(configuration);
        reply->setSslConfiguration(configuration);
    }

这是在QNetworkReprat得到回复时调用的Slot：

void connection::onFinished(QNetworkReply *reply){
    if (reply->error() == QNetworkReply::NoError) {
        //success
        qDebug() << "Success" <<reply->readAll();
        delete reply;
    }
    else {
        //failure
        qDebug() << "Failure" <<reply->errorString();
        qDebug() << "Reply: " << reply->readAll();
        delete reply;
    }
}

QNetworkReply 的信号"完成"当然连接到"onFinish"插槽

    MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    manager = new QNetworkAccessManager;
    ui->setupUi(this);
    Connector = new connection(ui,manager);
connect(manager,SIGNAL(finished(QNetworkReply*)),Connector,SLOT(onFinished(QNetworkReply*)));
}

也许你们中的某个人可以告诉我 POST 请求有什么问题？查看服务器的回复，似乎 JSON 数据从未发送过，或者以某种方式以错误的方式格式化......

Answer 1

由于您没有提供确切的URL，因此我建议您尝试检查url.isValid()和URL。errorString() .

我刚刚遇到了一个问题，代码在Qt 4.8中运行良好，但是在Qt 5.4中，我所有的POST请求都得到了400个错误请求回复。我通过Wireshark查看了TCP转储，发现URL是错误的。就我而言url.setPath("api/register");是导致问题的线路。它应该被url.setPath("/api/register");

希望对您有所帮助。