使用Qt4调用REST服务

有人能告诉我一个使用Qt4调用REST服务的简单方法吗？我找不到任何关于如何做到这一点的像样的文档。现在我有一些类似于：

int NetworkClient::attemptLogin( QString username, QString password, int & error ) {

  QNetworkAccessManager *manager = new QNetworkAccessManager(this);

  QObject::connect(manager, SIGNAL(finished(QNetworkReply *)), SLOT(slotRequestFinished(QNetworkReply *)));

  QNetworkRequest request;
  request.setUrl(QUrl("http://192.168.20.155:3000/api/rest/user?id=" + username));
  request.setHeader(QNetworkRequest::ContentTypeHeader, "text/xml");

  QNetworkReply *reply = 0;
  reply = manager->get(request);

  qDebug() << reply;

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您的函数与我调用REST服务时使用的函数非常接近。我要做的是为每个http谓词创建一个函数

这是我的post函数说明对SSL和基本授权的支持

void Http::post(QString &url, QString &user, QString &password, QString &data)
{
    QSslConfiguration config(QSslConfiguration::defaultConfiguration());

    QNetworkRequest request;


    request.setSslConfiguration(config);

    request.setRawHeader("Authorization", "Basic " +
                         QByteArray(QString("%1:%2").arg(user).arg(password).toAscii().toBase64())
                     );
    request.setRawHeader("Accept", "application/xml");
    request.setRawHeader("Content-Type", "application/xml");

    request.setUrl(QUrl(url));

    qDebug() << url;

    connect(netManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(finished(QNetworkReply*)));

    reply = netManager->post(request, data.toAscii());

    connect(reply, SIGNAL(downloadProgress(qint64,qint64)), this, SIGNAL(progress(qint64,qint64)));
    connect(reply, SIGNAL(sslErrors(QList<QSslError>)), this, SLOT(sslError(QList<QSslError>)));
    connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(networkError(QNetworkReply::NetworkError)));
}

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您的函数与我调用REST服务时使用的函数非常接近。我要做的是为每个http谓词创建一个函数

这是我的post函数说明对SSL和基本授权的支持

void Http::post(QString &url, QString &user, QString &password, QString &data)
{
    QSslConfiguration config(QSslConfiguration::defaultConfiguration());

    QNetworkRequest request;


    request.setSslConfiguration(config);

    request.setRawHeader("Authorization", "Basic " +
                         QByteArray(QString("%1:%2").arg(user).arg(password).toAscii().toBase64())
                     );
    request.setRawHeader("Accept", "application/xml");
    request.setRawHeader("Content-Type", "application/xml");

    request.setUrl(QUrl(url));

    qDebug() << url;

    connect(netManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(finished(QNetworkReply*)));

    reply = netManager->post(request, data.toAscii());

    connect(reply, SIGNAL(downloadProgress(qint64,qint64)), this, SIGNAL(progress(qint64,qint64)));
    connect(reply, SIGNAL(sslErrors(QList<QSslError>)), this, SLOT(sslError(QList<QSslError>)));
    connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(networkError(QNetworkReply::NetworkError)));
}

这是我的照片

QNetworkReply* Gateway::performPost(QString service, QMap<QString, QString>params)
{
    qDebug() << QString("Post with params #").append(service) << params;

    //Initialize uri
    QString uri = Gateway::SERVICE_BASE_URI;
    QNetworkAccessManager oManager;

    //Connect signal
    connect(oManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(finished(QNetworkReply*)));

    //Construct request
    QUrl res = QUrl(
        uri.append(service)
    );

    QUrl query;

    QMapIterator<QString, QString> i(params);
    while(i.hasNext()) {
        i.next();
        query.addEncodedQueryItem(QUrl::toPercentEncoding(i.key()), QUrl::toPercentEncoding(i.value()));
    }

    //Do request
    QNetworkRequest postRequest = QNetworkRequest(res);

    //Return QNetworkReply Object   
    return oManager.post(postRequest, query.encodedQuery());
}


//Implementation
QMap<QString,QString> map;

map.insert("foo", "bar");
map.insert("bar", "foo");

//Perform the POST request
oGateway.performPost("foo/bar", map);

这是我的照片

QNetworkReply* Gateway::performPost(QString service, QMap<QString, QString>params)
{
    qDebug() << QString("Post with params #").append(service) << params;

    //Initialize uri
    QString uri = Gateway::SERVICE_BASE_URI;
    QNetworkAccessManager oManager;

    //Connect signal
    connect(oManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(finished(QNetworkReply*)));

    //Construct request
    QUrl res = QUrl(
        uri.append(service)
    );

    QUrl query;

    QMapIterator<QString, QString> i(params);
    while(i.hasNext()) {
        i.next();
        query.addEncodedQueryItem(QUrl::toPercentEncoding(i.key()), QUrl::toPercentEncoding(i.value()));
    }

    //Do request
    QNetworkRequest postRequest = QNetworkRequest(res);

    //Return QNetworkReply Object   
    return oManager.post(postRequest, query.encodedQuery());
}


//Implementation
QMap<QString,QString> map;

map.insert("foo", "bar");
map.insert("bar", "foo");

//Perform the POST request
oGateway.performPost("foo/bar", map);

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以下是我最终解决问题的方式：

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谢谢大家的帮助

以下是我最终解决问题的方式：

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谢谢大家的帮助

这非常接近。我已经添加了我的呼叫代码，所以你可以看到我正在尝试做什么。这非常接近。我已经添加了我的呼叫代码，所以你可以看到我正在尝试做什么。