如何告诉QWebPage不要加载特定类型的资源? [英] How to tell QWebPage not to load specific type of resources?

问题描述

如何告诉 QWebPage 不要加载特定类型的资源，例如js，css或png?

How to tell QWebPage not to load specific type of resources like js, css or png?

推荐答案

解决方案是扩展 QNetworkAccessManager 类，并覆盖其虚拟方法 QNetworkAccessManager::createRequest 在我们的实现中，我们检查请求的URL的路径，如果它是我们不想下载的URL，则我们创建并移交一个空的请求，而不是真正的请求. 下面是一个完整的可行示例.

The solution is to extend QNetworkAccessManager class and override it's virtual method QNetworkAccessManager::createRequest In our implementation we check the path of the requested url and if it's the one we don't want to download we create and hand over an empty request instead of the real one. Below is a complete, working example.

#include <QApplication>
#include <QUrl>

#include <QtWebKit/QWebPage>
#include <QtWebKit/QWebFrame>

#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkRequest>
#include <QtNetwork/QNetworkReply>
#include <QDebug>


class NAM : public QNetworkAccessManager {

    Q_OBJECT

protected:

    virtual QNetworkReply * createRequest(Operation op,
                                          const QNetworkRequest & req,
                                          QIODevice * outgoingData = 0) {

        if (req.url().path().endsWith("css")) {
            qDebug() << "skipping " << req.url();
            return QNetworkAccessManager::createRequest(QNetworkAccessManager::GetOperation,
                                                        QNetworkRequest(QUrl()));
        } else {
            return QNetworkAccessManager::createRequest(op, req, outgoingData);
        }
    }
};


int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QWebPage page;
    NAM nam;

    page.setNetworkAccessManager(&nam);
    page.mainFrame()->load(QUrl("http://google.com"));

    app.exec();
}

#include "main.moc"

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