QNetworkAccessManager, large file and memory full

[AlterX]

Hi,
i'm giving to my app the ability to download an archive from internet; tha is a very large compressed file.
When i'm downloading it, obviously i get a memory full problem (i'm using readAll).
I can use a read() to get a block of data and write it into a heap buffer (so i must enlarge the heap of the app).
After i must use qUncompress that returns a stacked object (so i've also this problem).
Is there a way to download a file without modify all at compile-time?
Or that above is wrong and there is another way?

Thanks
Gianni

[danhicksbyron]

As you receive it you need to write it to a file, and then decompress it file-to-file.

[AlterX]

As you receive it you need to write it to a file, and then decompress it file-to-file.

Yes it's right!
I've written during a receiving of bytes...but now for decompression i must use other algorithm and not qUncompress.
I found Quazip, but i prefer to use zlib...how can i specify zlib in .pro file?

[danhicksbyron]

Of course, if you're using zlib you could decompress it as you receive it, so only one file write.

zlib is just a few files -- you could either put it in a separate static library or just put the files directly into your project. (Hint, you don't need everything, just the stuff for uncompress.)

[AlterX]

Of course, if you're using zlib you could decompress it as you receive it, so only one file write.

zlib is just a few files -- you could either put it in a separate static library or just put the files directly into your project. (Hint, you don't need everything, just the stuff for uncompress.)

Yes, i've used it and a beautiful think is that only the header file is mandatory since zlib is present in the Qt core!