Mercurial > hg > nginx-tests
view lib/Test/Nginx/HTTP2.pm @ 1406:6404fd77f367
Tests: adjusted connect timeout in HTTP/2 tests.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Thu, 29 Nov 2018 19:18:20 +0300 |
parents | d6382e557fc0 |
children | 4e48bf51714f |
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package Test::Nginx::HTTP2; # (C) Sergey Kandaurov # (C) Nginx, Inc. # Module for nginx HTTP/2 tests. ############################################################################### use warnings; use strict; use Test::More qw//; use IO::Select; use IO::Socket; use Socket qw/ CRLF /; use Data::Dumper; use Test::Nginx; my %cframe = ( 0 => { name => 'DATA', value => \&data }, 1 => { name => 'HEADERS', value => \&headers }, # 2 => { name => 'PRIORITY', value => \&priority }, 3 => { name => 'RST_STREAM', value => \&rst_stream }, 4 => { name => 'SETTINGS', value => \&settings }, 5 => { name => 'PUSH_PROMISE', value => \&push_promise }, 6 => { name => 'PING', value => \&ping }, 7 => { name => 'GOAWAY', value => \&goaway }, 8 => { name => 'WINDOW_UPDATE', value => \&window_update }, 9 => { name => 'CONTINUATION', value => \&continuation }, ); sub new { my $class = shift; my ($port, %extra) = @_; my $s = $extra{socket} || new_socket($port, %extra); my $preface = defined $extra{preface} ? $extra{preface} : 'PRI * HTTP/2.0' . CRLF . CRLF . 'SM' . CRLF . CRLF; if ($extra{proxy}) { raw_write($s, $extra{proxy}); } # preface raw_write($s, $preface); my $self = bless { socket => $s, last_stream => -1, dynamic_encode => [ static_table() ], dynamic_decode => [ static_table() ], static_table_size => scalar @{[static_table()]}, iws => 65535, conn_window => 65535, streams => {} }, $class; return $self if $extra{pure}; # update windows, if any my $frames = $self->read(all => [ { type => 'WINDOW_UPDATE' }, { type => 'SETTINGS'} ]); # 6.5.3. Settings Synchronization if (grep { $_->{type} eq "SETTINGS" && $_->{flags} == 0 } @$frames) { $self->h2_settings(1); } return $self; } sub h2_ping { my ($self, $payload) = @_; raw_write($self->{socket}, pack("x2C2x5a8", 8, 0x6, $payload)); } sub h2_rst { my ($self, $stream, $error) = @_; raw_write($self->{socket}, pack("x2C2xNN", 4, 0x3, $stream, $error)); } sub h2_goaway { my ($self, $stream, $lstream, $err, $debug, %extra) = @_; $debug = '' unless defined $debug; my $len = defined $extra{len} ? $extra{len} : 8 + length($debug); my $buf = pack("x2C2xN3A*", $len, 0x7, $stream, $lstream, $err, $debug); my @bufs = map { raw_write($self->{socket}, substr $buf, 0, $_, ""); select undef, undef, undef, 0.2; } @{$extra{split}}; raw_write($self->{socket}, $buf); } sub h2_priority { my ($self, $w, $stream, $dep, %extra) = @_; $stream = 0 unless defined $stream; $dep = 0 unless defined $dep; $dep |= $extra{excl} << 31 if exists $extra{excl}; raw_write($self->{socket}, pack("x2C2xNNC", 5, 0x2, $stream, $dep, $w)); } sub h2_window { my ($self, $win, $stream) = @_; $stream = 0 unless defined $stream; raw_write($self->{socket}, pack("x2C2xNN", 4, 0x8, $stream, $win)); } sub h2_settings { my ($self, $ack, @pairs) = @_; my $len = 6 * @pairs / 2; my $buf = pack_length($len) . pack "CCx4", 0x4, $ack ? 0x1 : 0x0; $buf .= pack "nN", splice @pairs, 0, 2 while @pairs; raw_write($self->{socket}, $buf); } sub h2_unknown { my ($self, $payload) = @_; my $buf = pack_length(length($payload)) . pack("Cx5a*", 0xa, $payload); raw_write($self->{socket}, $buf); } sub h2_continue { my ($ctx, $stream, $uri) = @_; $uri->{h2_continue} = 1; return new_stream($ctx, $uri, $stream); } sub h2_body { my ($self, $body, $extra) = @_; $extra = {} unless defined $extra; my $len = length $body; my $sid = $self->{last_stream}; if ($len > $self->{conn_window} || $len > $self->{streams}{$sid}) { $self->read(all => [{ type => 'WINDOW_UPDATE' }]); } if ($len > $self->{conn_window} || $len > $self->{streams}{$sid}) { return; } $self->{conn_window} -= $len; $self->{streams}{$sid} -= $len; my $buf; my $split = ref $extra->{body_split} && $extra->{body_split} || []; for (@$split) { $buf .= pack_body($self, substr($body, 0, $_, ""), 0x0, $extra); } $buf .= pack_body($self, $body, 0x1, $extra) if defined $body; $split = ref $extra->{split} && $extra->{split} || []; for (@$split) { raw_write($self->{socket}, substr($buf, 0, $_, "")); return if $extra->{abort}; select undef, undef, undef, ($extra->{split_delay} || 0.2); } raw_write($self->{socket}, $buf); } sub new_stream { my ($self, $uri, $stream) = @_; my ($input, $buf); my ($d, $status); $self->{headers} = ''; my $host = $uri->{host} || 'localhost'; my $method = $uri->{method} || 'GET'; my $scheme = $uri->{scheme} || 'http'; my $path = $uri->{path} || '/'; my $headers = $uri->{headers}; my $body = $uri->{body}; my $prio = $uri->{prio}; my $dep = $uri->{dep}; my $pad = defined $uri->{padding} ? $uri->{padding} : 0; my $padlen = defined $uri->{padding} ? 1 : 0; my $type = defined $uri->{h2_continue} ? 0x9 : 0x1; my $flags = defined $uri->{continuation} ? 0x0 : 0x4; $flags |= 0x1 unless defined $body || defined $uri->{body_more} || defined $uri->{h2_continue}; $flags |= 0x8 if $padlen; $flags |= 0x20 if defined $dep || defined $prio; if ($stream) { $self->{last_stream} = $stream; } else { $self->{last_stream} += 2; } $self->{streams}{$self->{last_stream}} = $self->{iws}; $buf = pack("xxx"); # Length stub $buf .= pack("CC", $type, $flags); # END_HEADERS $buf .= pack("N", $self->{last_stream}); # Stream-ID $dep = 0 if defined $prio and not defined $dep; $prio = 16 if defined $dep and not defined $prio; unless ($headers) { $input = hpack($self, ":method", $method); $input .= hpack($self, ":scheme", $scheme); $input .= hpack($self, ":path", $path); $input .= hpack($self, ":authority", $host); $input .= hpack($self, "content-length", length($body)) if $body; } else { $input = join '', map { hpack($self, $_->{name}, $_->{value}, mode => $_->{mode}, huff => $_->{huff}) } @$headers if $headers; } $input = pack("B*", '001' . ipack(5, $uri->{table_size})) . $input if defined $uri->{table_size}; my $split = ref $uri->{continuation} && $uri->{continuation} || []; my @input = map { substr $input, 0, $_, "" } @$split; push @input, $input; # set length, attach headers, padding, priority my $hlen = length($input[0]) + $pad + $padlen; $hlen += 5 if $flags & 0x20; $buf |= pack_length($hlen); $buf .= pack 'C', $pad if $padlen; # Pad Length? $buf .= pack 'NC', $dep, $prio if $flags & 0x20; $buf .= $input[0]; $buf .= (pack 'C', 0) x $pad if $padlen; # Padding shift @input; while (@input) { $input = shift @input; $flags = @input ? 0x0 : 0x4; $buf .= pack_length(length($input)); $buf .= pack("CC", 0x9, $flags); $buf .= pack("N", $self->{last_stream}); $buf .= $input; } $split = ref $uri->{body_split} && $uri->{body_split} || []; for (@$split) { $buf .= pack_body($self, substr($body, 0, $_, ""), 0x0, $uri); } $buf .= pack_body($self, $body, 0x1, $uri) if defined $body; $split = ref $uri->{split} && $uri->{split} || []; for (@$split) { raw_write($self->{socket}, substr($buf, 0, $_, "")); goto done if $uri->{abort}; select undef, undef, undef, ($uri->{split_delay} || 0.2); } raw_write($self->{socket}, $buf); done: return $self->{last_stream}; } sub read { my ($self, %extra) = @_; my (@got); my $s = $self->{socket}; my $buf = ''; my $wait = $extra{wait}; local $Data::Dumper::Terse = 1; while (1) { $buf = raw_read($s, $buf, 9, $wait); last if length $buf < 9; my $length = unpack_length($buf); my $type = unpack('x3C', $buf); my $flags = unpack('x4C', $buf); my $stream = unpack "x5 B32", $buf; substr($stream, 0, 1) = 0; $stream = unpack("N", pack("B32", $stream)); $buf = raw_read($s, $buf, $length + 9, $wait); last if length($buf) < $length + 9; $buf = substr($buf, 9); my $frame = $cframe{$type}{value}($self, $buf, $length, $flags, $stream); $frame->{length} = $length; $frame->{type} = $cframe{$type}{name}; $frame->{flags} = $flags; $frame->{sid} = $stream; push @got, $frame; Test::Nginx::log_core('||', $_) for split "\n", Dumper $frame; $buf = substr($buf, $length); last unless $extra{all} && test_fin($got[-1], $extra{all}); }; return \@got; } ############################################################################### sub pack_body { my ($ctx, $body, $flags, $extra) = @_; my $pad = defined $extra->{body_padding} ? $extra->{body_padding} : 0; my $padlen = defined $extra->{body_padding} ? 1 : 0; my $buf = pack_length(length($body) + $pad + $padlen); $flags |= 0x8 if $padlen; vec($flags, 0, 1) = 0 if $extra->{body_more}; $buf .= pack 'CC', 0x0, $flags; # DATA, END_STREAM $buf .= pack 'N', $ctx->{last_stream}; $buf .= pack 'C', $pad if $padlen; # DATA Pad Length? $buf .= $body; $buf .= pack "x$pad" if $padlen; # DATA Padding return $buf; } sub test_fin { my ($frame, $all) = @_; my @test = @{$all}; # wait for the specified DATA length for (@test) { if ($_->{length} && $frame->{type} eq 'DATA') { # check also for StreamID if needed if (!$_->{sid} || $_->{sid} == $frame->{sid}) { $_->{length} -= $frame->{length}; } } } @test = grep { !(defined $_->{length} && $_->{length} == 0) } @test; # wait for the fin flag @test = grep { !(defined $_->{fin} && (!defined $_->{sid} || $_->{sid} == $frame->{sid}) && $_->{fin} & $frame->{flags}) } @test if defined $frame->{flags}; # wait for the specified frame @test = grep { !($_->{type} && $_->{type} eq $frame->{type}) } @test; @{$all} = @test; } sub headers { my ($ctx, $buf, $len, $flags) = @_; $ctx->{headers} = substr($buf, 0, $len); return unless $flags & 0x4; { headers => hunpack($ctx, $buf, $len) }; } sub continuation { my ($ctx, $buf, $len, $flags) = @_; $ctx->{headers} .= substr($buf, 0, $len); return unless $flags & 0x4; { headers => hunpack($ctx, $ctx->{headers}, length($ctx->{headers})) }; } sub data { my ($ctx, $buf, $len) = @_; return { data => substr($buf, 0, $len) }; } sub settings { my ($ctx, $buf, $len) = @_; my %payload; my $skip = 0; for (1 .. $len / 6) { my $id = hex unpack "\@$skip n", $buf; $skip += 2; $payload{$id} = unpack "\@$skip N", $buf; $skip += 4; $ctx->{iws} = $payload{$id} if $id == 4; } return \%payload; } sub push_promise { my ($ctx, $buf, $len, $flags) = @_; $len -= 4; { promised => unpack("N", $buf), headers => hunpack($ctx, substr($buf, 4, $len), $len) }; } sub ping { my ($ctx, $buf, $len) = @_; return { value => unpack "A$len", $buf }; } sub rst_stream { my ($ctx, $buf, $len) = @_; return { code => unpack "N", $buf }; } sub goaway { my ($ctx, $buf, $len) = @_; my %payload; my $stream = unpack "B32", $buf; substr($stream, 0, 1) = 0; $stream = unpack("N", pack("B32", $stream)); $payload{last_sid} = $stream; $len -= 4; $payload{code} = unpack "x4 N", $buf; $payload{debug} = unpack "x8 A$len", $buf; return \%payload; } sub window_update { my ($ctx, $buf, $len, $flags, $sid) = @_; my $value = unpack "B32", $buf; substr($value, 0, 1) = 0; $value = unpack("N", pack("B32", $value)); unless ($sid) { $ctx->{conn_window} += $value; } else { $ctx->{streams}{$sid} = $ctx->{iws} unless defined $ctx->{streams}{$sid}; $ctx->{streams}{$sid} += $value; } return { wdelta => $value }; } sub pack_length { pack 'c3', unpack 'xc3', pack 'N', $_[0]; } sub unpack_length { unpack 'N', pack 'xc3', unpack 'c3', $_[0]; } sub raw_read { my ($s, $buf, $len, $timo) = @_; $timo = 5 unless $timo; my $got = ''; while (length($buf) < $len && IO::Select->new($s)->can_read($timo)) { $s->sysread($got, 16384) or last; log_in($got); $buf .= $got; } return $buf; } sub raw_write { my ($s, $message) = @_; local $SIG{PIPE} = 'IGNORE'; while (IO::Select->new($s)->can_write(0.4)) { log_out($message); my $n = $s->syswrite($message); last unless $n; $message = substr($message, $n); last unless length $message; } } sub new_socket { my ($port, %extra) = @_; my $npn = $extra{'npn'}; my $alpn = $extra{'alpn'}; my $s; $port ||= port(8080); eval { local $SIG{ALRM} = sub { die "timeout\n" }; local $SIG{PIPE} = sub { die "sigpipe\n" }; alarm(5); $s = IO::Socket::INET->new( Proto => 'tcp', PeerAddr => "127.0.0.1:$port", ); require IO::Socket::SSL if $extra{'SSL'}; IO::Socket::SSL->start_SSL($s, SSL_verify_mode => IO::Socket::SSL::SSL_VERIFY_NONE(), SSL_npn_protocols => $npn ? [ $npn ] : undef, SSL_alpn_protocols => $alpn ? [ $alpn ] : undef, SSL_error_trap => sub { die $_[1] } ) if $extra{'SSL'}; alarm(0); }; alarm(0); if ($@) { log_in("died: $@"); return undef; } return $s; } sub static_table { [ '', '' ], # unused [ ':authority', '' ], [ ':method', 'GET' ], [ ':method', 'POST' ], [ ':path', '/' ], [ ':path', '/index.html' ], [ ':scheme', 'http' ], [ ':scheme', 'https' ], [ ':status', '200' ], [ ':status', '204' ], [ ':status', '206' ], [ ':status', '304' ], [ ':status', '400' ], [ ':status', '404' ], [ ':status', '500' ], [ 'accept-charset', '' ], [ 'accept-encoding', 'gzip, deflate' ], [ 'accept-language', '' ], [ 'accept-ranges', '' ], [ 'accept', '' ], [ 'access-control-allow-origin', '' ], [ 'age', '' ], [ 'allow', '' ], [ 'authorization', '' ], [ 'cache-control', '' ], [ 'content-disposition', '' ], [ 'content-encoding', '' ], [ 'content-language', '' ], [ 'content-length', '' ], [ 'content-location', '' ], [ 'content-range', '' ], [ 'content-type', '' ], [ 'cookie', '' ], [ 'date', '' ], [ 'etag', '' ], [ 'expect', '' ], [ 'expires', '' ], [ 'from', '' ], [ 'host', '' ], [ 'if-match', '' ], [ 'if-modified-since', '' ], [ 'if-none-match', '' ], [ 'if-range', '' ], [ 'if-unmodified-since', '' ], [ 'last-modified', '' ], [ 'link', '' ], [ 'location', '' ], [ 'max-forwards', '' ], [ 'proxy-authenticate', '' ], [ 'proxy-authorization', '' ], [ 'range', '' ], [ 'referer', '' ], [ 'refresh', '' ], [ 'retry-after', '' ], [ 'server', '' ], [ 'set-cookie', '' ], [ 'strict-transport-security', '' ], [ 'transfer-encoding', '' ], [ 'user-agent', '' ], [ 'vary', '' ], [ 'via', '' ], [ 'www-authenticate', '' ], } # RFC 7541, 5.1. Integer Representation sub ipack { my ($base, $d) = @_; return sprintf("%.*b", $base, $d) if $d < 2**$base - 1; my $o = sprintf("%${base}b", 2**$base - 1); $d -= 2**$base - 1; while ($d >= 128) { $o .= sprintf("%8b", $d % 128 + 128); $d /= 128; } $o .= sprintf("%08b", $d); return $o; } sub iunpack { my ($base, $b, $s) = @_; my $len = unpack("\@$s B8", $b); $s++; my $prefix = substr($len, 0, 8 - $base); $len = '0' x (8 - $base) . substr($len, 8 - $base); $len = unpack("C", pack("B8", $len)); return ($len, $s, $prefix) if $len < 2**$base - 1; my $m = 0; my $d; do { $d = unpack("\@$s C", $b); $s++; $len += ($d & 127) * 2**$m; $m += $base; } while (($d & 128) == 128); return ($len, $s, $prefix); } sub hpack { my ($ctx, $name, $value, %extra) = @_; my $table = $ctx->{dynamic_encode}; my $mode = defined $extra{mode} ? $extra{mode} : 1; my $huff = $extra{huff}; my ($index, $buf) = 0; # 6.1. Indexed Header Field Representation if ($mode == 0) { ++$index until $index > $#$table or $table->[$index][0] eq $name and $table->[$index][1] eq $value; $buf = pack('B*', '1' . ipack(7, $index)); } # 6.2.1. Literal Header Field with Incremental Indexing if ($mode == 1) { splice @$table, $ctx->{static_table_size}, 0, [ $name, $value ]; ++$index until $index > $#$table or $table->[$index][0] eq $name; my $value = $huff ? huff($value) : $value; $buf = pack('B*', '01' . ipack(6, $index) . ($huff ? '1' : '0') . ipack(7, length($value))); $buf .= $value; } # 6.2.1. Literal Header Field with Incremental Indexing -- New Name if ($mode == 2) { splice @$table, $ctx->{static_table_size}, 0, [ $name, $value ]; my $name = $huff ? huff($name) : $name; my $value = $huff ? huff($value) : $value; my $hbit = ($huff ? '1' : '0'); $buf = pack('B*', '01000000'); $buf .= pack('B*', $hbit . ipack(7, length($name))); $buf .= $name; $buf .= pack('B*', $hbit . ipack(7, length($value))); $buf .= $value; } # 6.2.2. Literal Header Field without Indexing if ($mode == 3) { ++$index until $index > $#$table or $table->[$index][0] eq $name; my $value = $huff ? huff($value) : $value; $buf = pack('B*', '0000' . ipack(4, $index) . ($huff ? '1' : '0') . ipack(7, length($value))); $buf .= $value; } # 6.2.2. Literal Header Field without Indexing -- New Name if ($mode == 4) { my $name = $huff ? huff($name) : $name; my $value = $huff ? huff($value) : $value; my $hbit = ($huff ? '1' : '0'); $buf = pack('B*', '00000000'); $buf .= pack('B*', $hbit . ipack(7, length($name))); $buf .= $name; $buf .= pack('B*', $hbit . ipack(7, length($value))); $buf .= $value; } # 6.2.3. Literal Header Field Never Indexed if ($mode == 5) { ++$index until $index > $#$table or $table->[$index][0] eq $name; my $value = $huff ? huff($value) : $value; $buf = pack('B*', '0001' . ipack(4, $index) . ($huff ? '1' : '0') . ipack(7, length($value))); $buf .= $value; } # 6.2.3. Literal Header Field Never Indexed -- New Name if ($mode == 6) { my $name = $huff ? huff($name) : $name; my $value = $huff ? huff($value) : $value; my $hbit = ($huff ? '1' : '0'); $buf = pack('B*', '00010000'); $buf .= pack('B*', $hbit . ipack(7, length($name))); $buf .= $name; $buf .= pack('B*', $hbit . ipack(7, length($value))); $buf .= $value; } return $buf; } sub hunpack { my ($ctx, $data, $length) = @_; my $table = $ctx->{dynamic_decode}; my %headers; my $skip = 0; my ($index, $name, $value, $size); my $field = sub { my ($b) = @_; my ($len, $s, $huff) = iunpack(7, @_); my $field = substr($b, $s, $len); $field = $huff ? dehuff($field) : $field; $s += $len; return ($field, $s); }; my $add = sub { my ($h, $n, $v) = @_; return $h->{$n} = $v unless exists $h->{$n}; $h->{$n} = [ $h->{$n} ] unless ref $h->{$n}; push @{$h->{$n}}, $v; }; while ($skip < $length) { my $ib = unpack("\@$skip B8", $data); if (substr($ib, 0, 1) eq '1') { ($index, $skip) = iunpack(7, $data, $skip); $add->(\%headers, $table->[$index][0], $table->[$index][1]); next; } if (substr($ib, 0, 2) eq '01') { ($index, $skip) = iunpack(6, $data, $skip); $name = $table->[$index][0]; ($name, $skip) = $field->($data, $skip) unless $name; ($value, $skip) = $field->($data, $skip); splice @$table, $ctx->{static_table_size}, 0, [ $name, $value ]; $add->(\%headers, $name, $value); next; } if (substr($ib, 0, 4) eq '0000') { ($index, $skip) = iunpack(4, $data, $skip); $name = $table->[$index][0]; ($name, $skip) = $field->($data, $skip) unless $name; ($value, $skip) = $field->($data, $skip); $add->(\%headers, $name, $value); next; } if (substr($ib, 0, 3) eq '001') { ($size, $skip) = iunpack(5, $data, $skip); # TODO: handle dynamic table size update next; } last; } return \%headers; } sub huff_code { scalar { pack('C', 0) => '1111111111000', pack('C', 1) => '11111111111111111011000', pack('C', 2) => '1111111111111111111111100010', pack('C', 3) => '1111111111111111111111100011', pack('C', 4) => '1111111111111111111111100100', pack('C', 5) => '1111111111111111111111100101', pack('C', 6) => '1111111111111111111111100110', pack('C', 7) => '1111111111111111111111100111', pack('C', 8) => '1111111111111111111111101000', pack('C', 9) => '111111111111111111101010', pack('C', 10) => '111111111111111111111111111100', pack('C', 11) => '1111111111111111111111101001', pack('C', 12) => '1111111111111111111111101010', pack('C', 13) => '111111111111111111111111111101', pack('C', 14) => '1111111111111111111111101011', pack('C', 15) => '1111111111111111111111101100', pack('C', 16) => '1111111111111111111111101101', pack('C', 17) => '1111111111111111111111101110', pack('C', 18) => '1111111111111111111111101111', pack('C', 19) => '1111111111111111111111110000', pack('C', 20) => '1111111111111111111111110001', pack('C', 21) => '1111111111111111111111110010', pack('C', 22) => '111111111111111111111111111110', pack('C', 23) => '1111111111111111111111110011', pack('C', 24) => '1111111111111111111111110100', pack('C', 25) => '1111111111111111111111110101', pack('C', 26) => '1111111111111111111111110110', pack('C', 27) => '1111111111111111111111110111', pack('C', 28) => '1111111111111111111111111000', pack('C', 29) => '1111111111111111111111111001', pack('C', 30) => '1111111111111111111111111010', pack('C', 31) => '1111111111111111111111111011', pack('C', 32) => '010100', pack('C', 33) => '1111111000', pack('C', 34) => '1111111001', pack('C', 35) => '111111111010', pack('C', 36) => '1111111111001', pack('C', 37) => '010101', pack('C', 38) => '11111000', pack('C', 39) => '11111111010', pack('C', 40) => '1111111010', pack('C', 41) => '1111111011', pack('C', 42) => '11111001', pack('C', 43) => '11111111011', pack('C', 44) => '11111010', pack('C', 45) => '010110', pack('C', 46) => '010111', pack('C', 47) => '011000', pack('C', 48) => '00000', pack('C', 49) => '00001', pack('C', 50) => '00010', pack('C', 51) => '011001', pack('C', 52) => '011010', pack('C', 53) => '011011', pack('C', 54) => '011100', pack('C', 55) => '011101', pack('C', 56) => '011110', pack('C', 57) => '011111', pack('C', 58) => '1011100', pack('C', 59) => '11111011', pack('C', 60) => '111111111111100', pack('C', 61) => '100000', pack('C', 62) => '111111111011', pack('C', 63) => '1111111100', pack('C', 64) => '1111111111010', pack('C', 65) => '100001', pack('C', 66) => '1011101', pack('C', 67) => '1011110', pack('C', 68) => '1011111', pack('C', 69) => '1100000', pack('C', 70) => '1100001', pack('C', 71) => '1100010', pack('C', 72) => '1100011', pack('C', 73) => '1100100', pack('C', 74) => '1100101', pack('C', 75) => '1100110', pack('C', 76) => '1100111', pack('C', 77) => '1101000', pack('C', 78) => '1101001', pack('C', 79) => '1101010', pack('C', 80) => '1101011', pack('C', 81) => '1101100', pack('C', 82) => '1101101', pack('C', 83) => '1101110', pack('C', 84) => '1101111', pack('C', 85) => '1110000', pack('C', 86) => '1110001', pack('C', 87) => '1110010', pack('C', 88) => '11111100', pack('C', 89) => '1110011', pack('C', 90) => '11111101', pack('C', 91) => '1111111111011', pack('C', 92) => '1111111111111110000', pack('C', 93) => '1111111111100', pack('C', 94) => '11111111111100', pack('C', 95) => '100010', pack('C', 96) => '111111111111101', pack('C', 97) => '00011', pack('C', 98) => '100011', pack('C', 99) => '00100', pack('C', 100) => '100100', pack('C', 101) => '00101', pack('C', 102) => '100101', pack('C', 103) => '100110', pack('C', 104) => '100111', pack('C', 105) => '00110', pack('C', 106) => '1110100', pack('C', 107) => '1110101', pack('C', 108) => '101000', pack('C', 109) => '101001', pack('C', 110) => '101010', pack('C', 111) => '00111', pack('C', 112) => '101011', pack('C', 113) => '1110110', pack('C', 114) => '101100', pack('C', 115) => '01000', pack('C', 116) => '01001', pack('C', 117) => '101101', pack('C', 118) => '1110111', pack('C', 119) => '1111000', pack('C', 120) => '1111001', pack('C', 121) => '1111010', pack('C', 122) => '1111011', pack('C', 123) => '111111111111110', pack('C', 124) => '11111111100', pack('C', 125) => '11111111111101', pack('C', 126) => '1111111111101', pack('C', 127) => '1111111111111111111111111100', pack('C', 128) => '11111111111111100110', pack('C', 129) => '1111111111111111010010', pack('C', 130) => '11111111111111100111', pack('C', 131) => '11111111111111101000', pack('C', 132) => '1111111111111111010011', pack('C', 133) => '1111111111111111010100', pack('C', 134) => '1111111111111111010101', pack('C', 135) => '11111111111111111011001', pack('C', 136) => '1111111111111111010110', pack('C', 137) => '11111111111111111011010', pack('C', 138) => '11111111111111111011011', pack('C', 139) => '11111111111111111011100', pack('C', 140) => '11111111111111111011101', pack('C', 141) => '11111111111111111011110', pack('C', 142) => '111111111111111111101011', pack('C', 143) => '11111111111111111011111', pack('C', 144) => '111111111111111111101100', pack('C', 145) => '111111111111111111101101', pack('C', 146) => '1111111111111111010111', pack('C', 147) => '11111111111111111100000', pack('C', 148) => '111111111111111111101110', pack('C', 149) => '11111111111111111100001', pack('C', 150) => '11111111111111111100010', pack('C', 151) => '11111111111111111100011', pack('C', 152) => '11111111111111111100100', pack('C', 153) => '111111111111111011100', pack('C', 154) => '1111111111111111011000', pack('C', 155) => '11111111111111111100101', pack('C', 156) => '1111111111111111011001', pack('C', 157) => '11111111111111111100110', pack('C', 158) => '11111111111111111100111', pack('C', 159) => '111111111111111111101111', pack('C', 160) => '1111111111111111011010', pack('C', 161) => '111111111111111011101', pack('C', 162) => '11111111111111101001', pack('C', 163) => '1111111111111111011011', pack('C', 164) => '1111111111111111011100', pack('C', 165) => '11111111111111111101000', pack('C', 166) => '11111111111111111101001', pack('C', 167) => '111111111111111011110', pack('C', 168) => '11111111111111111101010', pack('C', 169) => '1111111111111111011101', pack('C', 170) => '1111111111111111011110', pack('C', 171) => '111111111111111111110000', pack('C', 172) => '111111111111111011111', pack('C', 173) => '1111111111111111011111', pack('C', 174) => '11111111111111111101011', pack('C', 175) => '11111111111111111101100', pack('C', 176) => '111111111111111100000', pack('C', 177) => '111111111111111100001', pack('C', 178) => '1111111111111111100000', pack('C', 179) => '111111111111111100010', pack('C', 180) => '11111111111111111101101', pack('C', 181) => '1111111111111111100001', pack('C', 182) => '11111111111111111101110', pack('C', 183) => '11111111111111111101111', pack('C', 184) => '11111111111111101010', pack('C', 185) => '1111111111111111100010', pack('C', 186) => '1111111111111111100011', pack('C', 187) => '1111111111111111100100', pack('C', 188) => '11111111111111111110000', pack('C', 189) => '1111111111111111100101', pack('C', 190) => '1111111111111111100110', pack('C', 191) => '11111111111111111110001', pack('C', 192) => '11111111111111111111100000', pack('C', 193) => '11111111111111111111100001', pack('C', 194) => '11111111111111101011', pack('C', 195) => '1111111111111110001', pack('C', 196) => '1111111111111111100111', pack('C', 197) => '11111111111111111110010', pack('C', 198) => '1111111111111111101000', pack('C', 199) => '1111111111111111111101100', pack('C', 200) => '11111111111111111111100010', pack('C', 201) => '11111111111111111111100011', pack('C', 202) => '11111111111111111111100100', pack('C', 203) => '111111111111111111111011110', pack('C', 204) => '111111111111111111111011111', pack('C', 205) => '11111111111111111111100101', pack('C', 206) => '111111111111111111110001', pack('C', 207) => '1111111111111111111101101', pack('C', 208) => '1111111111111110010', pack('C', 209) => '111111111111111100011', pack('C', 210) => '11111111111111111111100110', pack('C', 211) => '111111111111111111111100000', pack('C', 212) => '111111111111111111111100001', pack('C', 213) => '11111111111111111111100111', pack('C', 214) => '111111111111111111111100010', pack('C', 215) => '111111111111111111110010', pack('C', 216) => '111111111111111100100', pack('C', 217) => '111111111111111100101', pack('C', 218) => '11111111111111111111101000', pack('C', 219) => '11111111111111111111101001', pack('C', 220) => '1111111111111111111111111101', pack('C', 221) => '111111111111111111111100011', pack('C', 222) => '111111111111111111111100100', pack('C', 223) => '111111111111111111111100101', pack('C', 224) => '11111111111111101100', pack('C', 225) => '111111111111111111110011', pack('C', 226) => '11111111111111101101', pack('C', 227) => '111111111111111100110', pack('C', 228) => '1111111111111111101001', pack('C', 229) => '111111111111111100111', pack('C', 230) => '111111111111111101000', pack('C', 231) => '11111111111111111110011', pack('C', 232) => '1111111111111111101010', pack('C', 233) => '1111111111111111101011', pack('C', 234) => '1111111111111111111101110', pack('C', 235) => '1111111111111111111101111', pack('C', 236) => '111111111111111111110100', pack('C', 237) => '111111111111111111110101', pack('C', 238) => '11111111111111111111101010', pack('C', 239) => '11111111111111111110100', pack('C', 240) => '11111111111111111111101011', pack('C', 241) => '111111111111111111111100110', pack('C', 242) => '11111111111111111111101100', pack('C', 243) => '11111111111111111111101101', pack('C', 244) => '111111111111111111111100111', pack('C', 245) => '111111111111111111111101000', pack('C', 246) => '111111111111111111111101001', pack('C', 247) => '111111111111111111111101010', pack('C', 248) => '111111111111111111111101011', pack('C', 249) => '1111111111111111111111111110', pack('C', 250) => '111111111111111111111101100', pack('C', 251) => '111111111111111111111101101', pack('C', 252) => '111111111111111111111101110', pack('C', 253) => '111111111111111111111101111', pack('C', 254) => '111111111111111111111110000', pack('C', 255) => '11111111111111111111101110', '_eos' => '111111111111111111111111111111', }}; sub huff { my ($string) = @_; my $code = &huff_code; my $ret = join '', map { $code->{$_} } (split //, $string); my $len = length($ret) + (8 - length($ret) % 8); $ret .= $code->{_eos}; return pack("B$len", $ret); } sub dehuff { my ($string) = @_; my $code = &huff_code; my %decode = reverse %$code; my $ret = ''; my $c = ''; for (split //, unpack('B*', $string)) { $c .= $_; next unless exists $decode{$c}; last if $decode{$c} eq '_eos'; $ret .= $decode{$c}; $c = ''; } return $ret; } ############################################################################### 1; ###############################################################################