\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5×\D6?\BDê\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2€ \00 $\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4ê\E9\F2á\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// # Time-stamp: "2004-06-20 21:47:55 ADT" require 5; package I18N::LangTags::Detect; use strict; use vars qw( @ISA $VERSION $MATCH_SUPERS $USING_LANGUAGE_TAGS $USE_LITERALS $MATCH_SUPERS_TIGHTLY); BEGIN { unless(defined &DEBUG) { *DEBUG = sub () {0} } } # define the constant 'DEBUG' at compile-time $VERSION = "1.05"; @ISA = (); use I18N::LangTags qw(alternate_language_tags locale2language_tag); sub _uniq { my %seen; return grep(!($seen{$_}++), @_); } sub _normalize { my(@languages) = map lc($_), grep $_, map {; $_, alternate_language_tags($_) } @_; return _uniq(@languages) if wantarray; return $languages[0]; } #--------------------------------------------------------------------------- # The extent of our functional interface: sub detect () { return __PACKAGE__->ambient_langprefs; } #=========================================================================== sub ambient_langprefs { # always returns things untainted my $base_class = $_[0]; return $base_class->http_accept_langs if length( $ENV{'REQUEST_METHOD'} || '' ); # I'm a CGI # it's off in its own routine because it's complicated # Not running as a CGI: try to puzzle out from the environment my @languages; foreach my $envname (qw( LANGUAGE LC_ALL LC_MESSAGES LANG )) { next unless $ENV{$envname}; DEBUG and print "Noting \$$envname: $ENV{$envname}\n"; push @languages, map locale2language_tag($_), # if it's a lg tag, fine, pass thru (untainted) # if it's a locale ID, try converting to a lg tag (untainted), # otherwise nix it. split m/[,:]/, $ENV{$envname} ; last; # first one wins } if($ENV{'IGNORE_WIN32_LOCALE'}) { # no-op } elsif(&_try_use('Win32::Locale')) { # If we have that module installed... push @languages, Win32::Locale::get_language() || '' if defined &Win32::Locale::get_language; } return _normalize @languages; } #--------------------------------------------------------------------------- sub http_accept_langs { # Deal with HTTP "Accept-Language:" stuff. Hassle. # This code is more lenient than RFC 3282, which you must read. # Hm. Should I just move this into I18N::LangTags at some point? no integer; my $in = (@_ > 1) ? $_[1] : $ENV{'HTTP_ACCEPT_LANGUAGE'}; # (always ends up untainting) return() unless defined $in and length $in; $in =~ s/\([^\)]*\)//g; # nix just about any comment if( $in =~ m/^\s*([a-zA-Z][-a-zA-Z]+)\s*$/s ) { # Very common case: just one language tag return _normalize $1; } elsif( $in =~ m/^\s*[a-zA-Z][-a-zA-Z]+(?:\s*,\s*[a-zA-Z][-a-zA-Z]+)*\s*$/s ) { # Common case these days: just "foo, bar, baz" return _normalize( $in =~ m/([a-zA-Z][-a-zA-Z]+)/g ); } # Else it's complicated... $in =~ s/\s+//g; # Yes, we can just do without the WS! my @in = $in =~ m/([^,]+)/g; my %pref; my $q; foreach my $tag (@in) { next unless $tag =~ m/^([a-zA-Z][-a-zA-Z]+) (?: ;q= ( \d* # a bit too broad of a RE, but so what. (?: \.\d+ )? ) )? $ /sx ; $q = (defined $2 and length $2) ? $2 : 1; #print "$1 with q=$q\n"; push @{ $pref{$q} }, lc $1; } return _normalize( # Read off %pref, in descending key order... map @{$pref{$_}}, sort {$b <=> $a} keys %pref ); } #=========================================================================== my %tried = (); # memoization of whether we've used this module, or found it unusable. sub _try_use { # Basically a wrapper around "require Modulename" # "Many men have tried..." "They tried and failed?" "They tried and died." return $tried{$_[0]} if exists $tried{$_[0]}; # memoization my $module = $_[0]; # ASSUME sane module name! { no strict 'refs'; no warnings 'once'; return($tried{$module} = 1) if %{$module . "::Lexicon"} or @{$module . "::ISA"}; # weird case: we never use'd it, but there it is! } print " About to use $module ...\n" if DEBUG; { local $SIG{'__DIE__'}; eval "require $module"; # used to be "use $module", but no point in that. } if($@) { print "Error using $module \: $@\n" if DEBUG > 1; return $tried{$module} = 0; } else { print " OK, $module is used\n" if DEBUG; return $tried{$module} = 1; } } #--------------------------------------------------------------------------- 1; __END__ =head1 NAME I18N::LangTags::Detect - detect the user's language preferences =head1 SYNOPSIS use I18N::LangTags::Detect; my @user_wants = I18N::LangTags::Detect::detect(); =head1 DESCRIPTION It is a common problem to want to detect what language(s) the user would prefer