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package CouchDB; |
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|
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# http://wiki.apache.org/couchdb/Getting_started_with_Perl |
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|
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use strict; |
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use warnings; |
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|
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use LWP::UserAgent; |
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use JSON; |
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use Data::Dump qw/dump/; |
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use Data::Structure::Util qw(unbless); |
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use Scalar::Util qw/blessed/; |
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use Storable qw/dclone/; |
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use Carp qw/carp/; |
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|
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sub new { |
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my ($class, $host, $port, $options) = @_; |
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|
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my $ua = LWP::UserAgent->new; |
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$ua->timeout(10); |
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$ua->env_proxy; |
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|
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$host ||= 'localhost'; |
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$port ||= 5984; |
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|
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return bless { |
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ua => $ua, |
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host => $host, |
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port => $port, |
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base_uri => "http://$host:$port/", |
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}, $class; |
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} |
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|
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sub ua { shift->{ua} } |
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sub base { shift->{base_uri} } |
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|
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sub request { |
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my ($self, $method, $uri, $content) = @_; |
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|
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my $full_uri = $self->base . $uri; |
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my $req; |
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|
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if (defined $content) { |
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#Content-Type: application/json |
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|
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$req = HTTP::Request->new( $method, $full_uri, undef, $content ); |
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$req->header('Content-Type' => 'application/json'); |
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} else { |
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$req = HTTP::Request->new( $method, $full_uri ); |
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} |
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|
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my $response = $self->ua->request($req); |
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|
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if ($response->is_success) { |
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return $response->content; |
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} else { |
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die($response->status_line . ":" . $response->content); |
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} |
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} |
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|
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our $rev; |
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|
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sub rev { |
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my ($self,$url) = @_; |
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my $rev = $rev->{$url}; |
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$rev ||= eval { $self->get( $url )->{_rev} }; |
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# warn "# rev $url $rev"; |
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return $rev; |
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} |
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|
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sub delete { |
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my ($self, $url) = @_; |
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|
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$self->request(DELETE => $url . '?rev=' . $self->rev($url) ); |
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} |
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|
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sub get { |
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my ($self, $url) = @_; |
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|
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JSON->new->utf8->decode( $self->request(GET => $url) ); |
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} |
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|
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sub put { |
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my ($self, $url, $json) = @_; |
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|
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$json->{_rev} = $rev->{$url} if defined $rev->{$url}; |
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|
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my $data = dclone $json; |
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$data = unbless $data if blessed $data; |
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|
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# warn "# put ",dump( $data ); |
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|
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$json = JSON->new->utf8->encode( $data ); |
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|
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carp "# put ",$json; |
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|
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do { |
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my $json = eval { $self->request(PUT => $url, $json) }; |
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if ( $@ ) { |
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$rev->{$url} = $self->rev( $url ); |
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warn "refresh rev $url = ", $rev->{$url}; |
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} else { |
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$rev->{$url} = JSON->new->decode( $json )->{rev}; |
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} |
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} until ! $@; |
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} |
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|
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sub post { |
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my ($self, $url, $json) = @_; |
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|
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$self->request(POST => $url, $json); |
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} |
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|
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our $audit = __PACKAGE__->new; |
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|
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sub _store_audit { |
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my ( $id, $data ) = @_; |
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$audit->put( "pxelator/$id", $data ); |
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} |
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|
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1; |