How to read string as XML with QDomDocument object in QT

StackOverflow https://stackoverflow.com/questions/8993345

  •  13-11-2019
  •  | 
  •  

Question

I am receiving string as a XML document with this function:

void HttpWindow::replyFinished(QNetworkReply *reply)
{
     QString data = reply->readAll().trimmed();
     bool value=document->setContent(&data);
}

and here is my slot and signal:

connect(reply, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*)));

When I put above code I get error that there is not pre-defined function that receive one string as I have sended...Can somone try to correct this so I can see how to put this Qstring value into xml document. So I can read XML

Thank you

EDIT: these are the functions that I have to choose, I have tried all but it seems I am not sending right paremeters:

 // Qt extensions
    bool setContent(const QByteArray& text, bool namespaceProcessing, QString *errorMsg=0, int *errorLine=0, int *errorColumn=0 );
    bool setContent(const QString& text, bool namespaceProcessing, QString *errorMsg=0, int *errorLine=0, int *errorColumn=0 );
    bool setContent(QIODevice* dev, bool namespaceProcessing, QString *errorMsg=0, int *errorLine=0, int *errorColumn=0 );
    bool setContent(QXmlInputSource *source, bool namespaceProcessing, QString *errorMsg=0, int *errorLine=0, int *errorColumn=0 );
    bool setContent(const QByteArray& text, QString *errorMsg=0, int *errorLine=0, int *errorColumn=0 );
    bool setContent(const QString& text, QString *errorMsg=0, int *errorLine=0, int *errorColumn=0 );
    bool setContent(QIODevice* dev, QString *errorMsg=0, int *errorLine=0, int *errorColumn=0 );
    bool setContent(QXmlInputSource *source, QXmlReader *reader, QString *errorMsg=0, int *errorLine=0, int *errorColumn=0 );

EDIT 2: I can't compile it, I can give you this code:

httpwindow.cpp: In member function 'void HttpWindow::replyFinished(QNetworkReply*)':
httpwindow.cpp:140: error: no matching function for call to 'QDomDocument::setContent(QString*)'
..\..\..\..\Desktop\Qt\4.7.4\mingw\include/QtXml/qdom.h:343: note: candidates are: bool QDomDocument::setContent(const QByteArray&, bool, QString*, int*, int*)
..\..\..\..\Desktop\Qt\4.7.4\mingw\include/QtXml/qdom.h:344: note:                 bool QDomDocument::setContent(const QString&, bool, QString*, int*, int*)
..\..\..\..\Desktop\Qt\4.7.4\mingw\include/QtXml/qdom.h:345: note:                 bool QDomDocument::setContent(QIODevice*, bool, QString*, int*, int*)
..\..\..\..\Desktop\Qt\4.7.4\mingw\include/QtXml/qdom.h:346: note:                 bool QDomDocument::setContent(QXmlInputSource*, bool, QString*, int*, int*)
..\..\..\..\Desktop\Qt\4.7.4\mingw\include/QtXml/qdom.h:347: note:                 bool QDomDocument::setContent(const QByteArray&, QString*, int*, int*)
..\..\..\..\Desktop\Qt\4.7.4\mingw\include/QtXml/qdom.h:348: note:                 bool QDomDocument::setContent(const QString&, QString*, int*, int*)
..\..\..\..\Desktop\Qt\4.7.4\mingw\include/QtXml/qdom.h:349: note:                 bool QDomDocument::setContent(QIODevice*, QString*, int*, int*)
..\..\..\..\Desktop\Qt\4.7.4\mingw\include/QtXml/qdom.h:350: note:                 bool QDomDocument::setContent(QXmlInputSource*, QXmlReader*, QString*, int*, int*)

Or tell me what to do to get that Qdebug output. You mean like Qdebug<<data ?

Was it helpful?

Solution

There is indeed no overload of QDomDocument::setContent() which takes a QString pointer, passing by value would fix the error.

However there is another serious issue in your code which is that you are trying to convert from a QByteArray (the result of readAll()) to a QString. This is not only unnecessary but dangerous, since the conversion is done assuming the content is ascii. You can just call document->setContent(reply).

Licensed under: CC-BY-SA with attribution
Not affiliated with StackOverflow
scroll top