lib/PXElator/CouchDB.pm

package CouchDB;

# http://wiki.apache.org/couchdb/Getting_started_with_Perl

use strict;
use warnings;

use LWP::UserAgent;
use JSON;
use Data::Dump qw/dump/;
use Data::Structure::Util qw(unbless);
use Scalar::Util qw/blessed/;
use Storable qw/dclone/;
use Carp qw/carp/;

sub new {
        my ($class, $host, $port, $options) = @_;

        my $ua = LWP::UserAgent->new;
        $ua->timeout(10);
        $ua->env_proxy;

        $host ||= 'localhost';
        $port ||= 5984;

        return bless {
                ua                       => $ua,
                host             => $host,
                port             => $port,
                base_uri => "http://$host:$port/",
        }, $class;
}

sub ua { shift->{ua} }
sub base { shift->{base_uri} }

sub request {
        my ($self, $method, $uri, $content) = @_;

        my $full_uri = $self->base . $uri;
        my $req;

        if (defined $content) {
                #Content-Type: application/json

                $req = HTTP::Request->new( $method, $full_uri, undef, $content );
                $req->header('Content-Type' => 'application/json');
        } else {
                $req = HTTP::Request->new( $method, $full_uri );
        }

        my $response = $self->ua->request($req);

        if ($response->is_success) {
                return $response->content;
        } else {
                die($response->status_line . ":" . $response->content);
        }
}

our $rev;

sub rev {
        my ($self,$url) = @_;
        my $rev = $rev->{$url};
        $rev  ||= eval { $self->get( $url )->{_rev} };
#       warn "# rev $url $rev";
        return $rev;
}

sub delete {
        my ($self, $url) = @_;

        $self->request(DELETE => $url . '?rev=' . $self->rev($url) );
}

sub get {
        my ($self, $url) = @_;

        JSON->new->utf8->decode( $self->request(GET => $url) );
}

sub put {
        my ($self, $url, $json) = @_;

        $json->{_rev} = $rev->{$url} if defined $rev->{$url};

        my $data = dclone $json;
        $data = unbless $data if blessed $data;

#       warn "# put ",dump( $data );

        $json = JSON->new->utf8->encode( $data );

        carp "# put ",$json;

        do {
                my $json = eval { $self->request(PUT => $url, $json) };
                if ( $@ ) {
                        $rev->{$url} = $self->rev( $url );
                        warn "refresh rev $url = ", $rev->{$url};
                } else {
                        $rev->{$url} = JSON->new->decode( $json )->{rev};
                }
        } until ! $@;
}

sub post {
        my ($self, $url, $json) = @_;

        $self->request(POST => $url, $json);
}

our $audit = __PACKAGE__->new;

sub _store_audit {
        my ( $id, $data ) = @_;
        $audit->put( "pxelator/$id", $data );
}

1;
1	dpavlin	205	package CouchDB;
2
3			# http://wiki.apache.org/couchdb/Getting_started_with_Perl
4
5			use strict;
6			use warnings;
7
8			use LWP::UserAgent;
9			use JSON;
10			use Data::Dump qw/dump/;
11	dpavlin	206	use Data::Structure::Util qw(unbless);
12			use Scalar::Util qw/blessed/;
13			use Storable qw/dclone/;
14	dpavlin	221	use Carp qw/carp/;
15	dpavlin	205
16			sub new {
17			my ($class, $host, $port, $options) = @_;
18
19			my $ua = LWP::UserAgent->new;
20			$ua->timeout(10);
21			$ua->env_proxy;
22
23			$host \|\|= 'localhost';
24			$port \|\|= 5984;
25
26			return bless {
27			ua => $ua,
28			host => $host,
29			port => $port,
30			base_uri => "http://$host:$port/",
31			}, $class;
32			}
33
34			sub ua { shift->{ua} }
35			sub base { shift->{base_uri} }
36
37			sub request {
38			my ($self, $method, $uri, $content) = @_;
39
40			my $full_uri = $self->base . $uri;
41			my $req;
42
43			if (defined $content) {
44			#Content-Type: application/json
45
46			$req = HTTP::Request->new( $method, $full_uri, undef, $content );
47			$req->header('Content-Type' => 'application/json');
48			} else {
49			$req = HTTP::Request->new( $method, $full_uri );
50			}
51
52			my $response = $self->ua->request($req);
53
54			if ($response->is_success) {
55			return $response->content;
56			} else {
57			die($response->status_line . ":" . $response->content);
58			}
59			}
60
61			our $rev;
62
63	dpavlin	221	sub rev {
64			my ($self,$url) = @_;
65			my $rev = $rev->{$url};
66			$rev \|\|= eval { $self->get( $url )->{_rev} };
67			# warn "# rev $url $rev";
68			return $rev;
69			}
70
71	dpavlin	205	sub delete {
72			my ($self, $url) = @_;
73
74	dpavlin	221	$self->request(DELETE => $url . '?rev=' . $self->rev($url) );
75	dpavlin	205	}
76
77			sub get {
78			my ($self, $url) = @_;
79
80	dpavlin	206	JSON->new->utf8->decode( $self->request(GET => $url) );
81	dpavlin	205	}
82
83			sub put {
84			my ($self, $url, $json) = @_;
85
86	dpavlin	221	$json->{_rev} = $rev->{$url} if defined $rev->{$url};
87	dpavlin	205
88	dpavlin	210	my $data = dclone $json;
89			$data = unbless $data if blessed $data;
90	dpavlin	205
91	dpavlin	221	# warn "# put ",dump( $data );
92	dpavlin	205
93	dpavlin	210	$json = JSON->new->utf8->encode( $data );
94
95	dpavlin	221	carp "# put ",$json;
96	dpavlin	210
97			do {
98	dpavlin	221	my $json = eval { $self->request(PUT => $url, $json) };
99			if ( $@ ) {
100			$rev->{$url} = $self->rev( $url );
101			warn "refresh rev $url = ", $rev->{$url};
102			} else {
103			$rev->{$url} = JSON->new->decode( $json )->{rev};
104			}
105	dpavlin	210	} until ! $@;
106	dpavlin	205	}
107
108			sub post {
109			my ($self, $url, $json) = @_;
110
111			$self->request(POST => $url, $json);
112			}
113
114	dpavlin	206	our $audit = __PACKAGE__->new;
115
116	dpavlin	483	sub _store_audit {
117			my ( $id, $data ) = @_;
118			$audit->put( "pxelator/$id", $data );
119	dpavlin	206	}
120
121	dpavlin	205	1;