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#!perl
# Created by Hauke Daempfling 2018
use strict;
use warnings;
use IO::Compress::Gzip qw/$GzipError Z_PARTIAL_FLUSH/;
our $VERSION = '0.67';
my $app = sub {
my $env = shift;
die "This app needs a server that supports psgi.streaming"
unless $env->{'psgi.streaming'};
die "The client did not send the 'Accept-Encoding: gzip' header"
unless defined $env->{HTTP_ACCEPT_ENCODING}
&& $env->{HTTP_ACCEPT_ENCODING} =~ /\bgzip\b/;
# Note some browsers don't correctly support gzip correctly,
# see e.g. https://metacpan.org/pod/Plack::Middleware::Deflater
# but we're not checking that here (and we don't set the Vary header)
return sub {
my $respond = shift;
my $zipped;
my $z = IO::Compress::Gzip->new(\$zipped)
or die "IO::Compress::Gzip: $GzipError";
my $w = $respond->([ 200, [
'Content-Type' => 'text/plain; charset=ascii',
'Content-Encoding' => 'gzip',
] ]);
for (1..10) {
$z->print("Hello, it is ".gmtime." GMT\n");
$z->flush(Z_PARTIAL_FLUSH);
$w->write($zipped) if defined $zipped;
$zipped = undef;
sleep 1;
}
$z->print("Goodbye!\n");
$z->close;
$w->write($zipped) if defined $zipped;
$w->close;
};
};
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