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Re^4: Lost in compressed encodings

by Skeeve (Parson)
on Apr 06, 2020 at 09:19 UTC ( [id://11115126]=note: print w/replies, xml ) Need Help??


in reply to Re^3: Lost in compressed encodings
in thread Lost in compressed encodings

Thanks for all your suggestions, Corion.

As my usecase is a module which reads a (kind of) CSV file, there are just 2 places, where I read a line from the file.

So I decied to do the "manual" decoding: 

open my $in, '<:raw', $filename or die "Can't read $filename: $!\n";
if ($filename=~/\.gz$/) {
    $in= new IO::Uncompress::Gunzip $in, { AutoClose => 1 };
}
# later on
$_= <$in>;
chomp;
@headers= split /\t/, lc decode('UTF-8' => $_);
# That's not really required as the header will always be
# ASCII-characters… But for completeness sake…

# further down I have a loop
while (<$in>) {
    chomp;
    # …
    @line{@headers}= split /\t/, decode('UTF-8' => $_);

[download]
s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
+.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e

Replies are listed 'Best First'.
Re^5: Lost in compressed encodings
by Tux (Canon) on Apr 06, 2020 at 10:49 UTC

    I would suggest using Text::CSV_XS to read/parse the CSV. It already knows how to deal with UTF-8.

    It is capable of using a TAB as separation character:

    use Text::CSV_XS;

my $csv = Text::CSV_XS->new ({ binary => 1, sep_char => "\t", auto_dia
+g => 1 });
my @headers = $csv->header ($in); # Read the docs, there are options p
+ossible here
while (my $row = $csv->getline ($in)) {
    # ...
    }

    [download]

    update: I realized later that Text::CSV_XS' csv function already supports gzip as part of the encoding attribute.

    use Text::CSV_XS qw( csv );
use PerlIO::via::gzip;

my $aoa = csv (in => "test.csv.gz",  encoding => ":via(gzip)");

    [download]

    Enjoy, Have FUN! H.Merijn
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