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ngcp-api-tools/lib/NGCP/API/Client.pm

435 lines
9.7 KiB

package NGCP::API::Client;
use strict;
use warnings;
use feature qw(state);
use Carp;
use Config::Tiny;
use JSON::XS;
use IO::Socket::SSL;
use LWP::UserAgent;
use Readonly;
use URI;
sub _load_config_defaults {
my $cfg_file = '/etc/default/ngcp-api';
my $cfg;
if (-e $cfg_file) {
$cfg = Config::Tiny->read($cfg_file)
or croak("Cannot read $cfg_file: $!");
}
Readonly my $config => {
host => $cfg->{_}->{NGCP_API_IP} // '127.0.0.1',
port => $cfg->{_}->{NGCP_API_PORT} // 80,
iface => $cfg->{_}->{NGCP_API_IFACE} // 'lo',
sslverify => $cfg->{_}->{NGCP_API_SSLVERIFY} // 'yes',
sslverify_lb => $cfg->{_}->{NGCP_API_SSLVERIFY_LOOPBACK} // 'no',
read_timeout => $cfg->{_}->{NGCP_API_READ_TIMEOUT} // 180,
page_rows => $cfg->{_}->{NGCP_API_PAGE_ROWS} // 10,
auth_user => $cfg->{_}->{AUTH_SYSTEM_LOGIN},
auth_pass => $cfg->{_}->{AUTH_SYSTEM_PASSWORD},
verbose => 0,
};
return $config;
}
sub _get_config_defaults {
state $config = _load_config_defaults();
return $config;
}
sub _create_ua {
my $self = shift;
my $ua = LWP::UserAgent->new();
if ($self->{_opts}{sslverify} eq 'no' ||
($self->{_opts}{sslverify_lb} eq 'no' &&
$self->{_opts}{iface} =~ /^(lo|dummy)/)) {
$ua->ssl_opts(
verify_hostname => 0,
SSL_verify_mode => IO::Socket::SSL::SSL_VERIFY_NONE,
);
}
my $urlbase = URI->new();
$urlbase->scheme('https');
$urlbase->host($self->{_opts}{host});
$urlbase->port($self->{_opts}{port});
if (defined $self->{_opts}{auth_user}) {
$ua->credentials($urlbase->host_port,
'api_admin_system', #'api_admin_http'
@{$self->{_opts}}{qw(auth_user auth_pass)});
}
$ua->timeout($self->{_opts}{read_timeout});
$self->{_ua} = $ua;
$self->{_urlbase} = $urlbase;
$self->set_verbose($self->{_opts}{verbose});
return ($ua, $urlbase);
}
sub _create_req {
my ($self, $method, $url) = @_;
my $req = HTTP::Request->new($method, $url->canonical);
if ($method eq 'PATCH') {
$req->content_type("application/json-patch+json; charset='utf8'");
} else {
$req->content_type("application/json; charset='utf8'");
}
$req->header('Prefer' => 'return=representation');
$req->header('NGCP-UserAgent' => 'NGCP::API::Client'); #remove for 'api_admin_http'
return $req;
}
sub _get_url {
my ($self, $uri) = @_;
my $url = $self->{_urlbase}->clone();
$url->path_query($uri);
return $url;
}
sub new {
my ($class, %opts) = @_;
my $self = {
_opts => { %opts },
};
bless $self, $class;
my $default_opts = _get_config_defaults();
foreach my $opt (keys %{$default_opts}) {
$self->{_opts}{$opt} //= $default_opts->{$opt};
}
$self->_create_ua();
return $self;
}
sub request {
my ($self, $method, $uri, $data) = @_;
my $req = $self->_create_req($method, $self->_get_url($uri));
if ($data) {
$req->content(encode_json($data));
}
my $res = $self->{_ua}->request($req);
return NGCP::API::Client::Result->new($res);
}
sub next_page {
my ($self, $uri) = @_;
my $collection_url;
if ($self->{_collection_iter}) {
$collection_url = $self->{_collection_url};
} else {
$collection_url = $self->_get_url($uri);
my %params = $collection_url->query_form;
$params{page} //= 1;
$params{rows} //= $self->{_opts}{page_rows};
$collection_url->query_form(\%params);
$self->{_collection_url} = $collection_url;
$self->{_collection_iter} = 1;
}
return unless $self->{_collection_url};
my $req = $self->_create_req('GET', $collection_url);
my $res = NGCP::API::Client::Result->new($self->{_ua}->request($req));
undef $self->{_collection_url};
return $res unless $res->is_success;
my $data = $res->as_hash();
if ($data && ref($data) eq 'HASH') {
my $new_url = URI->new($data->{_links}->{next}->{href});
return $res unless $new_url;
my %params = $new_url->query_form;
return $res unless grep { $_ eq 'page' } keys %params;
%params = ( $collection_url->query_form, $new_url->query_form );
$new_url->query_form(\%params);
$self->{_collection_url} = $self->_get_url($new_url->canonical);
}
return $res;
}
sub set_page_rows {
my ($self, $rows) = @_;
$self->{_opts}{page_rows} = $rows;
undef $self->{_collection_url};
undef $self->{_collection_iter};
return;
}
sub set_verbose {
my ($self, $verbose) = @_;
$self->{_ua}->show_progress($verbose);
my $handler_op = $verbose ? 'add_handler' : 'remove_handler';
foreach my $phase (qw(request_send response_done)) {
$self->{_ua}->$handler_op($phase, sub { shift->dump; return },
owner => 'NGCP::API::Client::set_verbose');
}
$self->{_opts}{verbose} = $verbose // 0;
return;
}
package NGCP::API::Client::Result;
use warnings;
use strict;
use parent qw(HTTP::Response);
use JSON::XS;
sub new {
my ($class, $res_obj) = @_;
my $self = $class->SUPER::new($res_obj->code,
$res_obj->message,
$res_obj->headers,
$res_obj->content);
$self->{_cached} = undef;
return $self;
}
sub as_hash {
my $self = shift;
return $self->{_cached} if $self->{_cached};
$self->{_cached} = decode_json($self->content);
return $self->{_cached};
}
sub result {
my $self = shift;
my $content;
if ($self->is_success) {
$content = $self->headers->header('Location') // '';
} else {
$content = $self->content;
}
return sprintf '%s %s', $self->status_line, $content;
}
1;
__END__
=pod
=head1 NAME
NGCP::API::Client - Client interface for the REST API
=head1 VERSION
See the package changelog
=head1 COMPATIBILITY
The version is compatible with NGCP platforms version >= mr4.3.x
=head1 SYNOPSIS
=head2
my $client = NGCP::API::Client->new();
# GET (list)
my $uri = '/api/customers/';
my $res = $client->request('GET', $uri);
# POST (create)
my $uri = '/api/customers/';
my $data = {
contact_id => 4,
status => 'test',
billing_profile_id => 4,
type => 'sipaccount',
};
my $res = $client->request('POST', $uri, $data);
# PUT (update)
my $uri = '/api/customers/2';
my $data = {
contact_id => 4,
status => 'test',
billing_profile_id => 4,
type => 'sipaccount',
};
my $res = $client->request('POST', $uri, $data);
# PATCH (update fields)
my $uri = '/api/customers/2';
my $data = [
{
op => 'remove',
path => '/add_vat',
},
{
op => 'replace',
path => '/contact_id',
value => 5,
},
];
my $res = $client->request('PATCH', $uri, $data);
# DELETE (remove)
my $uri = '/api/customers/2';
my $res = $client->request('DELETE', $uri);
# $res - response is an NGCP::API::Client::Result object
=head1 DESCRIPTION
The client is for internal NGCP REST API usage, primarily by internal
scripts and modules.
=head2 $client = NGCP::API::Client->new(%opts)
Creates a new NGCP::API::Client object.
The following options are supported:
=over
=item B<host>
Sets the IP to connect to.
Defaults to I<127.0.0.1>.
=item B<port>
Sets the port to connect to.
Defaults to I<80>.
=item B<iface>
Sets the network interface name.
Defaults to I<lo>.
=item B<sslverify>
Sets whether the TLS certificates should be verified.
Defaults to I<yes>.
=item B<sslverify_lb>
Sets whether the TLS certificates should be verified for the loopback
interface.
This setting will override the B<sslverify> if the B<iface> is set to I<lo>.
Defaults to I<no>.
=item B<read_timeout>
Sets the connection read timeout.
Defaults to I<180> seconds.
=item B<page_rows>
Sets the number of page rows to use on each next_page iteration.
Defaults to I<10>.
=item B<auth_user>
Sets the authentication user.
=item B<auth_pass>
Sets the authentication password.
=item B<verbose>
Set the verbose level.
Defaults to I<0>.
=back
=head2 $res = $client->request($method, $uri)
Sends a REST API request provided by a method (GET, POST, PUT, PATCH, DELETE).
Returns an NGCP::API::Client::Result object which inherits from HTTP:Respone.
=head2 $client->set_verbose(0|1)
Sets the verbosity of request and response operations, by enabling or
disabling debugging traces.
=head2 $res = NGCP::API::Client::Result->new()
Creates a new NGCP::API::Client::Result object.
=head2 $href = $res->as_hash()
Returns the result as a hash reference.
=head2 $str = $res->result()
Returns the result as a string based on the request success.
=head1 BUGS AND LIMITATIONS
L<https://bugtracker.sipwise.com>
=head1 AUTHOR
Kirill Solomko <ksolomko@sipwise.com>
=head1 LICENSE
Copyright (c) 2016-2019 Sipwise GmbH, Austria.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
=cut
# vim: sw=4 ts=4 et