[Qt-interest] Problem with RegExp extraction value from Json kind of response

[Meir Yanovich]

Thanks  very much

On Thu, Mar 25, 2010 at 12:25 PM, Christopher Probst <cprobst at ics.com>wrote:

> Hello Meir
>
> Using the regexp tester provided by Qt in
>
> $QTDIR/examples/tools/regexp
>
> the following works for me:
>
> #include <QDebug>
> #include <QRegExp>
>
> int main(int argc, char *argv[])
> {
>
>     QString http_response =
> "{\"key\":\"a99fdd865c2-10000\",\"oid\":1000055,\"expires\":0000,\"secret\":\"509c03edfdc7\",\"sign\":\"f0dd9e5226d0e77\"}";
>
>     QRegExp rx("\"key\":\"(.*)\",");
>     rx.setMinimal(true);
>     int yy = rx.indexIn(http_response);
>
>      qDebug() << yy;
>      qDebug() << rx.cap(0);
>      qDebug() << rx.cap(1);
>
> }
>
> gives me
> 1
> ""key":"a99fdd865c2-10000","
> "a99fdd865c2-10000"
>
>
> For more details see:
> http://doc.trolltech.com/4.6/tools-regexp.html
>
> Thanks,
> Christo
>
> On 25 Mar 2010, at 07:32, Meir Yanovich wrote:
>
> Hello all
> im trying to extract value by key from http Json kind of struct by  using
> simple RegExp
> here is my code i like to extract the key value from the string:
>
> QString http_response =
> "{\"key\":\"a99fdd865c2-10000\",\"oid\":1000055,\"expires\":0000,\"secret\":\"509c03edfdc7\",\"sign\":\"f0dd9e5226d0e77\"}";
> // or even if i use QRegExp::escape on the string it dosn't work
> QRegExp rx("\"key\"\:(.*?)\",");
> int yy = rx.indexIn(http_response);
> QString cap = rx.cap(1);
>
> but i cant capture the string and the yy variable always gives me -1
> i tested this regexp in this regexp tester : http://gskinner.com/RegExr/and its working fine
> what im doing wrong here ?
>
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