use strict;
use IO::Socket::INET;
-use Data::Dump qw/dump/;
+use Data::Dumper;
+use Carp qw/confess/;
+use Encode;
=head1 NAME
-Redis - The great new Redis!
+Redis - perl binding for Redis database
=cut
-our $VERSION = '0.01';
+our $VERSION = '1.2001';
-=head1 SYNOPSIS
+=head1 DESCRIPTION
Pure perl bindings for L<http://code.google.com/p/redis/>
- use Redis;
-
- my $r = Redis->new();
-
+This version supports protocol 1.2 or later of Redis available at
+L<git://github.com/antirez/redis>
+This documentation
+lists commands which are exercised in test suite, but
+additinal commands will work correctly since protocol
+specifies enough information to support almost all commands
+with same peace of code with a little help of C<AUTOLOAD>.
=head1 FUNCTIONS
=head2 new
-=cut
+ my $r = Redis->new; # $ENV{REDIS_SERVER} or 127.0.0.1:6379
+
+ my $r = Redis->new( server => '192.168.0.1:6379', debug = 0 );
-our $sock;
-my $server = '127.0.0.1:6379';
+=cut
sub new {
my $class = shift;
- my $self = {};
- bless($self, $class);
+ my $self = {@_};
- warn "# opening socket to $server";
+ $self->{debug} ||= $ENV{REDIS_DEBUG};
+ $self->{encoding} ||= 'utf8'; ## default to lax utf8
- $sock ||= IO::Socket::INET->new(
- PeerAddr => $server,
+ $self->{server} ||= $ENV{REDIS_SERVER} || '127.0.0.1:6379';
+ $self->{sock} = IO::Socket::INET->new(
+ PeerAddr => $self->{server},
Proto => 'tcp',
- ) || die $!;
+ ) || confess("Could not connect to Redis server at $self->{server}: $!");
- $self;
+ return bless($self, $class);
}
-=head1 Connection Handling
+# we don't want DESTROY to fallback into AUTOLOAD
+sub DESTROY {}
-=head2 quit
- $r->quit;
+### Deal with common, general case, Redis commands
+our $AUTOLOAD;
+sub AUTOLOAD {
+ my $self = shift;
+ my $sock = $self->{sock} || confess("Not connected to any server");
+ my $enc = $self->{encoding};
+ my $deb = $self->{debug};
+
+ my $command = $AUTOLOAD;
+ $command =~ s/.*://;
+
+ $self->__send_command($command, @_);
+
+ my $result = <$sock> || confess("Can't read socket: $!");
+ my $type = substr($result,0,1);
+ $result = substr($result,1,-2);
+
+ $result = decode($enc, $result) if $enc;
+ warn "[RECV] '$type$result'" if $deb;
+
+ if ( $command eq 'info' ) {
+ my $hash;
+ foreach my $l ( split(/\r\n/, $self->__read_bulk($result) ) ) {
+ my ($n,$v) = split(/:/, $l, 2);
+ $hash->{$n} = $v;
+ }
+ return $hash;
+ } elsif ( $command eq 'keys' ) {
+ return $self->__read_multi_bulk($result)
+ if $type eq '*';
+ my $keys = $self->__read_bulk($result);
+ return split(/\s/, $keys) if $keys;
+ return;
+ }
+
+ if ( $type eq '-' ) {
+ confess "[$command] $result";
+ } elsif ( $type eq '+' ) {
+ return $result;
+ } elsif ( $type eq '$' ) {
+ return $self->__read_bulk($result);
+ } elsif ( $type eq '*' ) {
+ return $self->__read_multi_bulk($result);
+ } elsif ( $type eq ':' ) {
+ return $result; # FIXME check if int?
+ } else {
+ confess "unknown type: $type", $self->__read_line();
+ }
+}
-=cut
+
+### Commands with extra logic
sub quit {
- my $self = shift;
+ my ($self) = @_;
+
+ $self->__send_command('QUIT');
- close( $sock ) || warn $!;
+ close(delete $self->{sock}) || confess("Can't close socket: $!");
+ return 1;
}
-=head2 ping
- $r->ping || die "no server?";
+### Socket operations
-=cut
+sub __send_command {
+ my $self = shift;
+ my $cmd = uc(shift);
+ my $enc = $self->{encoding};
+ my $deb = $self->{debug};
-sub ping {
- print $sock "PING\r\n";
- my $pong = <$sock>;
- die "ping failed, got ", dump($pong) unless $pong eq "+PONG\r\n";
+ warn "[SEND] $cmd ", Dumper([@_]) if $deb;
+
+ ## Encode command using multi-bulk format
+ my $n_elems = scalar(@_) + 1;
+ my $buf = "\*$n_elems\r\n";
+ for my $elem ($cmd, @_) {
+ my $bin = $enc ? encode($enc, $elem) : $elem;
+ $buf .= defined($bin) ? '$' . length($bin) . "\r\n$bin\r\n" : "\$-1\r\n";
+ }
+
+ ## Send command, take care for partial writes
+ warn "[SEND RAW] $buf" if $deb;
+ my $sock = $self->{sock} || confess("Not connected to any server");
+ while ($buf) {
+ my $len = syswrite $sock, $buf, length $buf;
+ confess("Could not write to Redis server: $!")
+ unless $len;
+ substr $buf, 0, $len, "";
+ }
+
+ return;
+}
+
+sub __read_bulk {
+ my ($self,$len) = @_;
+ return if $len < 0;
+
+ my $enc = $self->{encoding};
+ my $v = '';
+ if ( $len > 0 ) {
+ read($self->{sock}, $v, $len) || confess("Could not read from sock: $!");
+ $v = decode($enc, $v) if $enc;
+ }
+ my $crlf;
+ read($self->{sock}, $crlf, 2); # skip cr/lf
+
+ warn "[PARSE] read_bulk ".Dumper($v) if $self->{debug};
+ return $v;
+}
+
+sub __read_multi_bulk {
+ my ($self,$size) = @_;
+ return if $size <= 0;
+
+ my $sock = $self->{sock};
+ my $deb = $self->{debug};
+ my $enc = $self->{encoding};
+ my @list;
+ while ($size--) {
+ my $v = $self->__read_bulk( substr(<$sock>,1,-2) );
+ $v = decode($enc, $v) if $enc;
+ warn " [PARSE] read_multi_bulk ($size) ".Dumper($v) if $deb;
+ push @list, $v;
+ }
+
+ warn "[PARSE] multi_bulk ".Dumper( \@list ) if $deb;
+ return @list;
}
+1;
+
+__END__
+
+=head1 Connection Handling
+
+=head2 quit
+
+ $r->quit;
+
+=head2 ping
+
+ $r->ping || die "no server?";
+
+=head1 Commands operating on string values
+
+=head2 set
+
+ $r->set( foo => 'bar' );
+
+ $r->setnx( foo => 42 );
+
+=head2 get
+
+ my $value = $r->get( 'foo' );
+
+=head2 mget
+
+ my @values = $r->mget( 'foo', 'bar', 'baz' );
+
+=head2 incr
+
+ $r->incr('counter');
+
+ $r->incrby('tripplets', 3);
+
+=head2 decr
+
+ $r->decr('counter');
+
+ $r->decrby('tripplets', 3);
+
+=head2 exists
+
+ $r->exists( 'key' ) && print "got key!";
+
+=head2 del
+
+ $r->del( 'key' ) || warn "key doesn't exist";
+
+=head2 type
+
+ $r->type( 'key' ); # = string
+
+=head1 Commands operating on the key space
+
+=head2 keys
+
+ my @keys = $r->keys( '*glob_pattern*' );
+
+=head2 randomkey
+
+ my $key = $r->randomkey;
+
+=head2 rename
+
+ my $ok = $r->rename( 'old-key', 'new-key', $new );
+
+=head2 dbsize
+
+ my $nr_keys = $r->dbsize;
+
+=head1 Commands operating on lists
+
+See also L<Redis::List> for tie interface.
+
+=head2 rpush
+
+ $r->rpush( $key, $value );
+
+=head2 lpush
+
+ $r->lpush( $key, $value );
+
+=head2 llen
+
+ $r->llen( $key );
+
+=head2 lrange
+
+ my @list = $r->lrange( $key, $start, $end );
+
+=head2 ltrim
+
+ my $ok = $r->ltrim( $key, $start, $end );
+
+=head2 lindex
+
+ $r->lindex( $key, $index );
+
+=head2 lset
+
+ $r->lset( $key, $index, $value );
+
+=head2 lrem
+
+ my $modified_count = $r->lrem( $key, $count, $value );
+
+=head2 lpop
+
+ my $value = $r->lpop( $key );
+
+=head2 rpop
+
+ my $value = $r->rpop( $key );
+
+=head1 Commands operating on sets
+
+=head2 sadd
+
+ $r->sadd( $key, $member );
+
+=head2 srem
+
+ $r->srem( $key, $member );
+
+=head2 scard
+
+ my $elements = $r->scard( $key );
+
+=head2 sismember
+
+ $r->sismember( $key, $member );
+
+=head2 sinter
+
+ $r->sinter( $key1, $key2, ... );
+
+=head2 sinterstore
+
+ my $ok = $r->sinterstore( $dstkey, $key1, $key2, ... );
+
+=head1 Multiple databases handling commands
+
+=head2 select
+
+ $r->select( $dbindex ); # 0 for new clients
+
+=head2 move
+
+ $r->move( $key, $dbindex );
+
+=head2 flushdb
+
+ $r->flushdb;
+
+=head2 flushall
+
+ $r->flushall;
+
+=head1 Sorting
+
+=head2 sort
+
+ $r->sort("key BY pattern LIMIT start end GET pattern ASC|DESC ALPHA');
+
+=head1 Persistence control commands
+
+=head2 save
+
+ $r->save;
+
+=head2 bgsave
+
+ $r->bgsave;
+
+=head2 lastsave
+
+ $r->lastsave;
+
+=head2 shutdown
+
+ $r->shutdown;
+
+=head1 Remote server control commands
+
+=head2 info
+
+ my $info_hash = $r->info;
+
+=head1 ENCODING
+
+Since Redis knows nothing about encoding, we are forcing utf-8 flag on all data received from Redis.
+This change is introduced in 1.2001 version.
+
+This allows us to round-trip utf-8 encoded characters correctly, but might be problem if you push
+binary junk into Redis and expect to get it back without utf-8 flag turned on.
+
=head1 AUTHOR
Dobrica Pavlinusic, C<< <dpavlin at rot13.org> >>
You can find documentation for this module with the perldoc command.
perldoc Redis
+ perldoc Redis::List
+ perldoc Redis::Hash
You can also look for information at:
=head1 COPYRIGHT & LICENSE
-Copyright 2009 Dobrica Pavlinusic, all rights reserved.
+Copyright 2009-2010 Dobrica Pavlinusic, all rights reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
projects / perl-Redis.git / blobdiff