[solved] Qt application crashes when accessing QList<QLlnkedList<QUrl>* > from NetworkAccessManager->get() callback

[_nik]

I am currently trying to map redirect urls back to their original urls when using QNetworkAccessManager since I haven't found a built in function.

My application crashes when I am trying to access a QList<QLinkedList<QUrl>* > within the replyFinished(QNetworkReply* networkReply); slot of a QNetworkAccessManager.

If the url is a redirect url, I basically loop once over the list add the redirect url to the list, load the redirected url and then exit the function:

@foreach (QLinkedList<QUrl>* list, mList) {
if (list->front() == url) {
list->prepend(someUrl);
mNetworkAccessManager->get(someUrl);
return;
}
}@

If the url I got is not a redirect url, I execute the following code:

@QList<QLinkedList<QUrl>* >::iterator it = mList.begin();
while (it != mList.end()) {
QLinkedList<QUrl>* list = *it;

if (list->front() == networkReply->url()) {
    QUrl originalUrl = list->back();
    this->someOperation(originalUrl);
    mList.erase(it);
    delete list;
    break;
}

}@

The code above basically looks up the original url in the QLinkedList. The reason I use a QList around the QLinkedList is that I can have multiple requests running at the same time.

Somehow my application freezes and I can't do anything. Is it because replyFinished() gets called in a different Thread and it's trying to access things in the Main Thread or what's the reason behind it?