How to organize or extract info from a QByteArray - c++

Question

I have a programm that recieves a full block in a single QByteArray. This block is "divided" with 'carriage returns' followed by 'end lines' (\r\n). In the middle of all this junk I have a date. Most specifically in the third line (between the second and the third \r\n).
Every time I try to extract this date from the ByteArray I end up with some random junk. How to be more precise with the QByteArray?
What is the best way of extracting this date without altering my ByteArray? Take in consideration that I don't know the date and it can even be in the wrong format.
Just for understanding purposes, here is an example of my ByteArray:
RandomName=name\r\nRandomID=ID\r\nRandomDate=date\r\nRandomTime=time\r\nRandomWhatever=whatever(...)
EDIT:
Sorry for bad english.
Let's say I have the following text sent to me:
ProgName = Marcus
ProgID = 180
ProgDate = 15.01.16
ProgTime = 13:39
(More info)......
However, none of this information is useful to me... except the Date. Everything was stored in a single QByteArray (Let's call it 'ba'). So this is my ba:
ProgName(space)=(space)Marcus\r\nProgID(space)=(space)180\r\nProgDate(space)=(space)15.01.16\r\nProgTime(space)=(space)13:39\r\n (keeps going)
My problem is: Storing "15.01.16" (the "ProgDate") in a QString without altering or destroying ba.

Answer 1

There are a variety of ways, but try one of the following solutions.
1) using split()
foreach (auto subByte, yourByteArray.replace("\r\n", "\n").split('\n')) {
qDebug() << subByte;
foreach (auto val, subByte.split('=')) {
qDebug() << val;
}
}
2) using QRegularExpression/QRegularExpressionMatchIterator, making all pair(key, value)
QRegularExpression re("(\\w+)=(\\w+)");
QRegularExpressionMatchIterator i = re.globalMatch(yourByteArray);
while (i.hasNext()) {
QRegularExpressionMatch match = i.next();
qDebug() << match.captured(0)<< match.captured(1) << match.captured(2);
}
3) using QRegularExpression/QRegularExpressionMatch
QRegularExpression re("(RandomDate)=(\\w+)");
QRegularExpressionMatch match = re.match(yourByteArray);
if (match.hasMatch())
qDebug() << match.captured(0)<< match.captured(1) << match.captured(2);