QWebView中的覆盖页面回复 [英] Overriding page replies in QWebView

问题描述

我试图在Qt的QWebView中拦截页面/表单请求，并在某些情况下以其他内容作为响应.

I'm attempting to intercept a page/form request within Qt's QWebView and respond in some cases with alternative content.

QNetworkReply* ngcBrowser::createRequest(Operation operation, const QNetworkRequest& request, QIODevice* ioDevice)
{
        view->page()->setNetworkAccessManager(this);

        QNetworkReply* response = NULL;

        if (request.url().path().endsWith("ajax")) 
        {
            response = QNetworkAccessManager::createRequest(operation, request, ioDevice);

            response->write("{ success: true }");
        }
        else
        {
            response = QNetworkAccessManager::createRequest(operation, request, ioDevice);
        }

        return response;
}

正如您在上面看到的，我已经重写了QNAM createRequest方法，以接收所有页面请求，如果Url以.ajax扩展名结尾，则使用JSON对象进行响应.但是我发现很难将数据写回到网络流中.

As you can see above I've overridden the QNAM createRequest method to receive all page requests and respond with a JSON object if the Url ends with a .ajax extension. However i'm finding it hard to write data back into the network stream.

有关如何进行此操作的任何提示或提示?

Any hints or tips on how to go about this?

干杯， 本

更新:

阿比吉斯， 我已经尝试过您的解决方案，但是它无法将信号连接到插槽.

Hi Abhijith, I've attempted your solution however it fails to connect the signal to the slot.

QNetworkAccessManager* nam = view->page()->networkAccessManager();

bool status = QObject::connect(nam, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyReceived(QNetworkReply*)));

if(!status)
{
QErrorMessage errorMessage;
errorMessage.showMessage("connect failed");
errorMessage.exec();
}

错误:

Object :: connect:没有此类插槽ngcBrowser :: replyRecieved(QNetworkReply *)

Object::connect: No such slot ngcBrowser::replyRecieved(QNetworkReply*)

更新:

好了，但是我设法写IODevice时失败了，表明它是ReadOnly设备.

Ok I've managed to get his working however when i attempt to write to the IODevice is fails indicating its a ReadOnly device.

感谢所有帮助.

推荐答案

有很多方法可以做到这一点.这是一种方式.

There are many ways of doing this . This is one way.

connect(networkAccessManager,SIGNAL(finished(QNetworkReply*)),this,SLOT(replyReceived(QNetworkReply*)))
....

void replyReceived(QNetworkReply* reply)    // reply slot
{
    if(reply->request().url().path().endsWith("ajax"))
    {
      QByteArray array = reply->readll();/*reply is cleared after this call and will not contains anything.*/
      /*Write the JSON wherever you want to in the array*/
      reply->write(array);

    }
}

您必须根据要收听的信号进行微调-从QNAM完成答复，或从QNetworkReply完成答复.

You Have to fine tune this depending on which signal you want to listen to - replyfinished from QNAM or finished from QNetworkReply etc.

这篇关于QWebView中的覆盖页面回复的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！