Interpretting javascript using QScriptEngine

[Saranakumardb]

Hi there,

I'm trying to use use QScriptEngine to call a java script method.

Please refer below code, And I mentioned return values of each statement in comments.
Please correct me if my usage is wrong... My requirement is simple, I need to execute a method(which returns a string) present in javascript file and need to use returned string in my Qt program.

Thanks in advance...

int main(int argc, char *argv[])
{
	 QCoreApplication a(argc, argv);
 
	 QScriptEngine engine;
	 QScriptValue global = engine.globalObject();
	 QString str, str1, str2; int i=0;
	 QFile scriptFile("javascript.js");
	 // QFile scriptFile("New.html");
 
                 bool bRes = scriptFile.open(QIODevice::ReadOnly); // returns true
	 str = scriptFile.readAll(); // returns correct file content /script
	 bRes = engine.canEvaluate(str); // returns true
                 QScriptValue ctor = engine.evaluate(str); 
                 scriptFile.close();
	 bRes = ctor.isError(); // returns false
	 str1 = ctor.toString(); // returns "undefined"
	 bRes = ctor.isString();// returns false
 
	 ctor = engine.evaluate("Hello"); 
	 bRes = ctor.isString(); // returns false
	 bRes = ctor.isValid();// returns true
	 bRes = ctor.isUndefined();// returns false
	 bRes = ctor.isError();// returns true
	 str2 = ctor.toString();// returns "ReferenceError: Hello is not defined"
                 i = ctor.toInt32(); // returns 0
 
               return app.exec();
 
}

int main(int argc, char *argv[])
{
	 QCoreApplication a(argc, argv);

	 QScriptEngine engine;
	 QScriptValue global = engine.globalObject();
	 QString str, str1, str2; int i=0;
	 QFile scriptFile("javascript.js");
	 // QFile scriptFile("New.html");
	 
                 bool bRes = scriptFile.open(QIODevice::ReadOnly); // returns true
	 str = scriptFile.readAll(); // returns correct file content /script
	 bRes = engine.canEvaluate(str); // returns true
                 QScriptValue ctor = engine.evaluate(str); 
                 scriptFile.close();
	 bRes = ctor.isError(); // returns false
	 str1 = ctor.toString(); // returns "undefined"
	 bRes = ctor.isString();// returns false

	 ctor = engine.evaluate("Hello"); 
	 bRes = ctor.isString(); // returns false
	 bRes = ctor.isValid();// returns true
	 bRes = ctor.isUndefined();// returns false
	 bRes = ctor.isError();// returns true
	 str2 = ctor.toString();// returns "ReferenceError: Hello is not defined"
                 i = ctor.toInt32(); // returns 0
  
               return app.exec();

}

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javascript.js:

function hello()
{
    var testStr = "Hello";
    return testStr;
}

function hello()
{
    var testStr = "Hello";
    return testStr;
}

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Regards,
Saravana