[Qt-interest] Html parsing

[Gordon Schumacher]

Frédéric LECONTE wrote:
> It sounds like a complicated way to do a simple thing... 
> No simpliest code ?
>   

Don't try and parse the page - that's by far the hard way.  Use the
Google API... it hands you XML!

Something like this:


class myClass : public QObject
{
public:
   QHttp m_http;

   myClass()
   {
      connect(&m_http, SIGNAL(readyRead(const QHttpResponseHeader &)),
this, SLOT(readResponse(const QHttpResponseHeader &)));
   }

   void doTranslate(void)
   {
      QUrl
siteQuery(QLatin1String("http://ajax.googleapis.com/ajax/services/language/translate"));
      siteQuery.addQueryItem(QLatin1String("v"), QLatin1String("1.0"));
      siteQuery.addQueryItem(QLatin1String("langpair"),
         QString::fromUtf8(QUrl::toPercentEncoding(QLatin1String("fr|en")));
      #if defined(GOOGLE_KEY) // optional - define GOOGLE_KEY to your
API key
         siteQuery.addQueryItem(QLatin1String("key"),
QLatin1String(GOOGLE_KEY));
      #endif
      header.setValue(QLatin1String("Referrer"),
QLatin1String("http://your-site"));
      header.setValue(QLatin1String("Connection"),
QLatin1String("Keep-Alive"));
      header.setRequest(QLatin1String("GET"),
siteQuery.toString(QUrl::RemoveScheme | QUrl::RemoveAuthority));
      int connId = m_http.request(header);
   }

public slots:
   void readResponse(const QHttpResponseHeader & resp)
   {
      QString buildXlateObj = QLatin1String("var xlateObject = ");
      QScriptEngine engine;
      QString translation;

      // Fetch the translation out of the returned JSON object
      buildXlateObj += QString::fromUtf8(m_http.readAll()) +
QLatin1String(";");
      engine.evaluate(buildXlateObj);
      if (!engine.hasUncaughtException())
         translation = engine.evaluate(QLatin1String("return
xlateObject.responseData.translatedText;")).toString();
      if (!engine.hasUncaughtException())
         qDebug() << translation;
    }
}



I don't promise this builds and runs, it's taken out of code I have
written elsewhere.  But it should get you close!