Concurrent file downloading

[Lykurg]

QSignalMapper and QHash can help.

[Alir3z4]

QSignalMapper and QHash can help.

Yes, first thing came to my head was using QHash, QSignalMapper, but what should i keep in the QHash?
pointer or reference?
pointer like this?

QHash<QUrl, QHash<QNetworkReply*, QFile*> > *downloads;

QHash<QUrl, QHash<QNetworkReply*, QFile*> > *downloads;

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if pointers, what happen when i add new download and re-initialize *reply*, *file, or something like that? // or maybe i shouldn't use *reply*, *file and just make pointers add them to hash on the fly?
or i have to keep ref in it?

[Lykurg]

Pointers and file/replay aren't getting overwritten since you store it in the hash. Use QHash<QNetworkReply*, QFile*>. Just make sure you delete the pointers after the downloads are finished.

[ChrisW67]

You can also not store the reply pointer at all and use the QNetworkAccessManager::finished() signal, which passes the QNetworkReply object that finished. This is really only suitable for smaller files where the entire content is easily stored in memory and progress indication is not important.