Now I tried to use your script:
$_REQUEST['image'] is =
'../images/2002/09/jpg/ls006022_pettersson_johan.jpg';
<?
Header('Content-Type: application/x-gzip');
$command = 'tar -cf - ../images/' . $_REQUEST['image'] . ' | gzip -cf';
system( $command );
?>
It opens the download dialog again and lets me download the archive, but
it's named
download.gz (How can I change it to ls006022_pettersson_johan.gz?)
And if I open it with winrar it says, the content is named 'download' Size
is about
1600000 bytes, seems to be correct. when I try to extract the files there
pops up
an error message which says: Unexpected end of archive.
Have you got a sollution on that?
Grettings
Sascha
> > Hi Erwin,
>
> Hi Sascha,
>
> >
> > I tried to put the Header at top of the page. After this it opens an
> > download window
> > in the browser. But the download seems to be damaged. What can I do
> > about this?
> >
> > My commandline looks like this:
> >
> > <?
> > Header( 'Content-Type: application/x-tar' );
> > $command = 'tar -c '.$arrResult['name'].'.tgz
> > ../images/'.$arrResult['image'];
> > system($command);
> > ?>
>
> Ah...well...you are creating a tar file, named $arrResult['name'], with
> $arrResult['image'] as contents.
> You're creating this .tar file with the extension .tar.gz...which is
wrong,
> because that has to be .tar
>
> After that you are using the system() function to print the output to a
> user...the output from the tar -c command will NOT be a tarred archive,
but
> probably will return nothing...
>
> Try the following:
>
> <?
> Header( 'Content-Type: application/x-gzip); // CHANGED!!!
> $command = 'tar -cf - ../images/' . $arrResult['image'] . ' | gzip -cf'
> system( $command );
> ?>
>
> Step by step:
> tar -cf - <filename> | gzip -cf
>
> The first part: tar -cf - <filename>. With the -c argument, you'll create
a
> new archive. The -f option specifies the output. In this case, the output
is
> '-', which is STDOUT.
> The second part: gzip -cf. The -c options will print the output of the
gzip
> command to STDOUT, the -f option will force the output
>
> Between those two commands is a pipe (|). This character pipes the output
> from the first program to the second, so the output of the tar command
will
> be given to gzip, which will create a .tar.gz ( or .tgz) file for you!
>
> Also, if the arrResult['image'] file is given by a user, take a good look
at
> http://www.php.net/escapeshellarg. If you get this value from a database,
> which is secure (e.g. only contains items which you inserted), then you
> don't have to worry about that...
>
> I hope this helps?
>
> Greetz,
> Erwin
>
>
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