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##################################################################
## APIClientV4.pm - General Perl client for the API ##
## By Martijn van Oosterhout <kleptog@svana.org> ##
## ##
## Currently only supports uploading. Note the package actually ##
## creates a package named Geo::OSM::APIClient so upgrades to ##
## later versions will be easier. ##
## Licence: LGPL ##
##################################################################
use LWP::UserAgent;
use strict;
package Geo::OSM::APIClient;
use Geo::OSM::OsmReaderV3;
use MIME::Base64;
use HTTP::Request;
use Carp;
use Encode;
use POSIX qw(sigprocmask);
sub new
{
my( $class, %attr ) = @_;
my $obj = bless {}, $class;
my $url = $attr{api};
if( not defined $url )
{
croak "Did not specify aip url";
}
$url =~ s,/$,,; # Strip trailing slash
$obj->{url} = $url;
$obj->{client} = new LWP::UserAgent(agent => 'Geo::OSM::APIClientV4', timeout => 1200);
if( defined $attr{username} and defined $attr{password} )
{
if( $obj->{url} =~ m,http://([\w.]+)/, )
{
$obj->{client}->credentials( "$1:80", "Web Password", $attr{username}, $attr{password} );
}
my $encoded = MIME::Base64::encode_base64("$attr{username}:$attr{password}","");
$obj->{client}->default_header( "Authorization", "Basic $encoded" );
}
$obj->{reader} = init Geo::OSM::OsmReader( sub { _process($obj,@_) } );
return $obj;
}
# This is the callback from the parser. If checks if the buffer is defined.
# If the buffer is an array, append the new object. If the buffer is a proc,
# call it.
sub _process
{
my($obj,$ent) = @_;
if( not defined $obj->{buffer} )
{ die "Internal error: Received object with buffer" }
if( ref $obj->{buffer} eq "ARRAY" )
{ push @{$obj->{buffer}}, $ent; return }
if( ref $obj->{buffer} eq "CODE" )
{ $obj->{buffer}->($ent); return }
die "Internal error: don't know what to do with buffer $obj->{buffer}";
}
# Utility function to handle the temporary blocking of signals in a way that
# works with exception handling.
sub _with_blocked_sigs(&)
{
my $ss = new POSIX::SigSet( &POSIX::SIGINT );
my $func = shift;
my $os = new POSIX::SigSet;
sigprocmask( &POSIX::SIG_BLOCK, $ss, $os );
my $ret = eval { &$func };
sigprocmask( &POSIX::SIG_SETMASK, $os );
die $@ if $@;
return $ret;
}
sub _request
{
my $self = shift;
my $req = shift;
return _with_blocked_sigs { $self->{client}->request($req) };
}
sub last_error_code
{
return shift->{last_error}->code;
}
sub last_error_message
{
return shift->{last_error}->message;
}
sub create
{
my( $self, $ent ) = @_;
my $oldid = $ent->id;
$ent->set_id(0);
my $content = encode("utf-8", $ent->full_xml);
$ent->set_id($oldid);
my $req = new HTTP::Request PUT => $self->{url}."/".$ent->type()."/create";
$req->content($content);
# print $req->as_string;
my $res = $self->_request($req);
# print $res->as_string;
if( $res->code == 200 )
{
return $res->content
}
$self->{last_error} = $res;
return undef;
}
sub modify
{
my( $self, $ent ) = @_;
my $content = encode("utf-8", $ent->full_xml);
my $req = new HTTP::Request PUT => $self->{url}."/".$ent->type()."/".$ent->id();
$req->content($content);
# print $req->as_string;
my $res = $self->_request($req);
return $ent->id() if $res->code == 200;
$self->{last_error} = $res;
return undef;
}
sub delete
{
my( $self, $ent ) = @_;
my $content = encode("utf-8", $ent->full_xml);
my $req = new HTTP::Request DELETE => $self->{url}."/".$ent->type()."/".$ent->id();
# $req->content($content);
# print $req->as_string;
my $res = $self->_request($req);
return $ent->id() if $res->code == 200;
$self->{last_error} = $res;
return undef;
}
sub get($$)
{
my $self = shift;
my $type = shift;
my $id = shift;
my $req = new HTTP::Request GET => $self->{url}."/$type/$id";
my $res = $self->_request($req);
if( $res->code != 200 )
{
$self->{last_error} = $res;
return undef;
}
my @res;
$self->{buffer} = \@res;
$self->{reader}->parse($res->content);
undef $self->{buffer};
if( scalar(@res) != 1 )
{
die "Unexpected response for get_$type [".$res->content()."]\n";
}
return $res[0];
}
sub get_node($)
{
my $self = shift;
return $self->get("node",shift);
}
sub get_way($)
{
my $self = shift;
return $self->get("way",shift);
}
sub get_segment($)
{
my $self = shift;
return $self->get("segment",shift);
}
sub map($$$$)
{
my $self = shift;
my @bbox = @_;
my $req = new HTTP::Request GET => $self->{url}."/map?bbox=$bbox[0],$bbox[1],$bbox[2],$bbox[3]";
my $res = $self->_request($req);
if( $res->code != 200 )
{
$self->{last_error} = $res;
return undef;
}
my @res;
$self->{buffer} = \@res;
$self->{reader}->parse($res->content);
undef $self->{buffer};
return \@res;
}
1;
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