On Mon, Jul 02, 2018 at 08:44:30PM +0200, Gandalf Corvotempesta wrote:
> I'm trying to convert my simple bash script to a perl one (hoping
> would be included in PVE), for directly convert a Xen VM to a PVE/KVM
> on ZFS, in a single pass.
>
> I have one question: can someone tell me how to read a huge tar file
> (from a pipe) and extract one file at once?
>
> Something like the following pseudocode:
>
> $myTarFile = TAR::read(my_http_stream)
> foreach ( $myTarFile->extract() as $singleFIle ) {
> doSomeThing($singleFile)
> }
I'd recommend looking at libarchive's API (Archive::Libarchive), that
should be capable of dealing with a stream.
>
> I can't read all files inside the tarball, because this would require
> to download the whole file at first,
> then read it's content and then read each file one by one. It's too
> time consuming.
Or you just extract the files while downloading by piping to tar/bsdtar.
Also, seeing how this isn't a task you do 100 times a day every day,
time shouldn't be that much of an issue.
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