keys, _sock_result_bulk

[perl-Redis.git] / lib / Redis.pm

diff --git a/lib/Redis.pm b/lib/Redis.pm
index c976c6b..f0b21a2 100644 (file)
--- a/lib/Redis.pm
+++ b/lib/Redis.pm
@@ -3,14 +3,14 @@ package Redis;
 use warnings;
 use strict;
 
+use IO::Socket::INET;
+use Data::Dump qw/dump/;
+use Carp qw/confess/;
+
 =head1 NAME
 
 Redis - The great new Redis!
 
-=head1 VERSION
-
-Version 0.01
-
 =cut
 
 our $VERSION = '0.01';
@@ -18,34 +18,195 @@ our $VERSION = '0.01';
 
 =head1 SYNOPSIS
 
-Quick summary of what the module does.
-
-Perhaps a little code snippet.
+Pure perl bindings for L<http://code.google.com/p/redis/>
 
     use Redis;
 
-    my $foo = Redis->new();
-    ...
+    my $r = Redis->new();
+
 
-=head1 EXPORT
 
-A list of functions that can be exported.  You can delete this section
-if you don't export anything, such as for a purely object-oriented module.
 
 =head1 FUNCTIONS
 
-=head2 function1
+=head2 new
 
 =cut
 
-sub function1 {
+our $sock;
+my $server = '127.0.0.1:6379';
+
+sub new {
+       my $class = shift;
+       my $self = {};
+       bless($self, $class);
+
+       warn "# opening socket to $server";
+
+       $sock ||= IO::Socket::INET->new(
+               PeerAddr => $server,
+               Proto => 'tcp',
+       ) || die $!;
+
+       $self;
 }
 
-=head2 function2
+sub _sock_result {
+       my $result = <$sock>;
+       warn "# result: ",dump( $result );
+       $result =~ s{\r\n$}{} || warn "can't find cr/lf";
+       return $result;
+}
+
+sub _sock_result_bulk {
+       my $len = <$sock>;
+       warn "# len: ",dump($len);
+       return undef if $len eq "nil\r\n";
+       my $v;
+       read($sock, $v, $len) || die $!;
+       warn "# v: ",dump($v);
+       my $crlf;
+       read($sock, $crlf, 2); # skip cr/lf
+       return $v;
+}
+
+=head1 Connection Handling
+
+=head2 quit
+
+  $r->quit;
+
+=cut
+
+sub quit {
+       my $self = shift;
+
+       close( $sock ) || warn $!;
+}
+
+=head2 ping
+
+  $r->ping || die "no server?";
+
+=cut
+
+sub ping {
+       print $sock "PING\r\n";
+       my $pong = <$sock>;
+       die "ping failed, got ", dump($pong) unless $pong eq "+PONG\r\n";
+}
+
+=head1 Commands operating on string values
+
+=head2 set
+
+  $r->set( foo => 'bar', $new );
+
+=cut
+
+sub set {
+       my ( $self, $k, $v, $new ) = @_;
+       print $sock ( $new ? "SETNX" : "SET" ) . " $k " . length($v) . "\r\n$v\r\n";
+       my $ok = <$sock>;
+       confess dump($ok) unless $ok eq "+OK\r\n";
+}
+
+=head2 get
+
+  my $value = $r->get( 'foo' );
+
+=cut
+
+sub get {
+       my ( $self, $k ) = @_;
+       print $sock "GET $k\r\n";
+       _sock_result_bulk();
+}
+
+=head2 incr
+
+  $r->incr('counter');
+  $r->incr('tripplets', 3);
+
+=cut
+
+       
+
+sub incr {
+       my ( $self, $key, $value ) = @_;
+       if ( defined $value ) {
+               print $sock "INCRBY $key $value\r\n";
+       } else {
+               print $sock "INCR $key\r\n";
+       }
+       _sock_result();
+}
+
+=head2 decr
+
+  $r->decr('counter');
+  $r->decr('tripplets', 3);
+
+=cut
+
+sub decr {
+       my ( $self, $key, $value ) = @_;
+       if ( defined $value ) {
+               print $sock "DECRBY $key $value\r\n";
+       } else {
+               print $sock "DECR $key\r\n";
+       }
+       _sock_result();
+}
+
+=head2 exists
+
+  $r->exists( 'key' ) && print "got key!";
+
+=cut
+
+sub exists {
+       my ( $self, $key ) = @_;
+       print $sock "EXISTS $key\r\n";
+       _sock_result();
+}
+
+=head2 del
+
+  $r->del( 'key' ) || warn "key doesn't exist";
+
+=cut
+
+sub del {
+       my ( $self, $key ) = @_;
+       print $sock "DEL $key\r\n";
+       _sock_result();
+}
+
+=head2 type
+
+  $r->type( 'key' ); # = string
+
+=cut
+
+sub type {
+       my ( $self, $key ) = @_;
+       print $sock "TYPE $key\r\n";
+       _sock_result();
+}
+
+=head1 Commands operating on the key space
+
+=head2 keys
+
+  my @keys = $r->keys( '*glob_pattern*' );
 
 =cut
 
-sub function2 {
+sub keys {
+       my ( $self, $glob ) = @_;
+       print $sock "KEYS $glob\r\n";
+       return split(/\s/, _sock_result_bulk());
 }
 
 =head1 AUTHOR