LINE::Bot::API - SDK of the LINE Messaging API for Perl
# in the synopsis.psgi
use strict;
use warnings;
use LINE::Bot::API;
use LINE::Bot::API::Builder::SendMessage;
use Plack::Request;
my $bot = LINE::Bot::API->new(
channel_secret => $channel_secret,
channel_access_token => $channel_access_token,
);
sub {
my $req = Plack::Request->new(shift);
unless ($req->method eq 'POST' && $req->path eq '/callback') {
return [200, [], ['Not Found']];
}
unless ($bot->validate_signature($req->content, $req->header('X-Line-Signature'))) {
return [200, [], ['failed to validate signature']];
}
my $events = $bot->parse_events_from_json($req->content);
for my $event (@{ $events }) {
next unless $event->is_message_event && $event->is_text_message;
my $messages = LINE::Bot::API::Builder::SendMessage->new;
$messages->add_text( text => $event->text );
$bot->reply_message($event->reply_token, $messages->build);
}
return [200, [], ["OK"]];
};
LINE::Bot::API is a client library which lets you easily start using the LINE Messaging API. You can create a bot which runs on the LINE app by registering for a LINE Messaging API account. You can create a Messaging API account from the LINE Developers site.
You can find the channel secret and channel access token on the "Channel settings" page on the LINE Developers console which you can access from the LINE Developers site.
Use this documentation and our developer documentation to get started developing your own bot!
Create a new LINE::Bot::API instance.
my $bot = LINE::Bot::API->new(
channel_secret => $channel_secret,
channel_access_token => $channel_access_token,
);
Send reply messages to a user, room or group.
my $messages = LINE::Bot::API::Builder::SendMessage->new;
$messages->add_text( text => 'Example reply text' );
my $ret = $bot->reply_message($reply_token, $messages->build);
unless ($ret->is_success) {
# error
warn $ret->message;
for my $detail (@{ $ret->details // []}) {
warn " detail: " . $detail->{message};
}
}
You can get a reply_token from a webhook event object.
See the documentation for the parse_events_from_json($json) method.
You can also see the online API reference documentation. https://developers.line.me/en/docs/messaging-api/reference/#send-reply-message
Send push messages to a user, room or group.
my $messages = LINE::Bot::API::Builder::SendMessage->new;
$messages->add_text( text => 'Example push text' );
$bot->push_message($user_id, $messages->build);
You can get a user_id, room_id or group_id from a webhook event object.
See the documentation for the parse_events_from_json($json) method.
You can also see the online API reference documentation. https://developers.line.me/en/docs/messaging-api/reference/#send-push-message
Send push messages to multiple users.
my $messages = LINE::Bot::API::Builder::SendMessage->new;
$messages->add_text( text => 'Example push text' );
$bot->multicast([ $user_id ], $messages->build);
You can get a user_id from a webhook event object.
See the documentation for the parse_events_from_json($json) method.
You can also see the online API reference documentation. https://developers.line.me/en/docs/messaging-api/reference/#send-multicast-messages
my $req = Plack::Request->new( ... );
unless ($bot->validate_signature($req->content, $req->header('X-Line-Signature'))) {
die 'failed to signature validation';
}
Parse webhook event objects and build LINE::Bot::API::Event instances.
my $req = Plack::Request->new( ... );
my $events = $bot->parse_events_from_json($req->content);
for my $event (@{ $events }) {
unless ($event->is_unfollow_event && $event->is_leave_event) {
# Get a reply_token
my $reply_token = $event->reply_token;
}
if ($event->is_user_event) {
# Get a user_id
my $user_id = $event->user_id;
}
if ($event->is_room_event) {
# Get a room_id
my $room_id = $event->room_id;
}
if ($event->is_group_event) {
# Get a group_id
my $group_id = $event->group_id;
}
if ($event->is_message_event) {
# Get a message id
my $message_id = $event->message_id;
}
}
Bot leaves a room.
$bot->leave_room($room_id);
You can get a room_id from a webhook event object.
And see also parse_events_from_json($json) method's document.
Bot leaves a group.
$bot->leave_group($group_id);
You can get a group_id from a webhook event object.
See the documentation for the parse_events_from_json($json) method.
Get the original file which was sent by user.
my $ret = $bot->get_message_content($message_id);
if ($ret->is_success) {
my $filename = $ret->fh->filename;
open my $fh, '<', $file or die "$!: $file";
...
}
You can get a message_id from a webhook event object.
See the documentation for the parse_events_from_json($json) method.
You can also see the online API reference documentation. https://developers.line.me/en/docs/messaging-api/reference/#get-content
Get user profile information.
my $ret = $bot->get_profile($user_id);
if ($ret->is_success) {
say $ret->display_name;
say $ret->user_id;
say $ret->picture_url;
say $ret->status_message;
}
See the online API reference documentation. https://developers.line.me/en/docs/messaging-api/reference/#get-profile
When the LINE::Bot::API::Builder::SendMessage class is used, it is possible easily to build a message object.
That class supports a fluent interface.
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_text(
text => 'Closing the distance',
)->add_image(
image_url => 'http://example.com/image.jpg',
preview_url => 'http://example.com/image_preview.jpg',
);
$bot->reply_message($reply_token, $messages->build);
See the online API reference documentation. https://developers.line.me/en/docs/messaging-api/reference/#message-objects
Build a text type object.
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_text(
text => 'Closing the distance',
);
$bot->reply_message($reply_token, $messages->build);
Build an image type object.
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_image(
image_url => 'http://example.com/image.jpg',
preview_url => 'http://example.com/image_preview.jpg',
);
$bot->reply_message($reply_token, $messages->build);
Build a video type object.
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_video(
video_url => 'http://example.com/video.mp4',
preview_url => 'http://example.com/video_preview.jpg',
);
$bot->reply_message($reply_token, $messages->build);
Build an audio type object.
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_audio(
audio_url => 'http://example.com/image.m4a',
duration => 3601_000, # msec
);
$bot->reply_message($reply_token, $messages->build);
Build a location type object.
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_location(
title => 'LINE Corporation.',
address => 'Hikarie Shibuya-ku Tokyo 151-0002',
latitude => 35.6591,
longitude => 139.7040,
);
$bot->reply_message($reply_token, $messages->build);
Build a sticker type object.
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_sticker(
package_id => '1',
sticker_id => '2',
);
$bot->reply_message($reply_token, $messages->build);
Build an imagemap type object. You can use a helper module for the imagemap type.
my $imagemap = LINE::Bot::API::Builder::ImagemapMessage->new(
base_url => 'https://example.com/bot/images/rm001',
alt_text => 'this is an imagemap',
base_width => 1040,
base_height => 1040,
)->add_uri_action(
uri => 'http://example.com/',
area_x => 0,
area_y => 0,
area_width => 1040,
area_height => 520,
)->add_message_action(
text => 'message',
area_x => 0,
area_y => 520,
area_width => 1040,
area_height => 520,
);
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_imagemap($imagemap->build);
$bot->reply_message($reply_token, $messages->build);
Build a template type object. You can use a helper module for the template type.
my $buttons = LINE::Bot::API::Builder::TemplateMessage->new_buttons(
alt_text => 'this is a buttons template',
image_url => 'https://example.com/bot/images/image.jpg',
title => 'buttons',
text => 'description',
)->add_postback_action(
label => 'postback',
data => 'postback data',
text => 'postback message',
)->add_message_action(
label => 'message',
text => 'message',
)->add_uri_action(
label => 'uri',
uri => 'http://example.com/',
)->add_message_action(
label => 'message2',
text => 'message2',
);
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_template($buttons->build);
$bot->reply_message($reply_token, $messages->build);
my $confirm = LINE::Bot::API::Builder::TemplateMessage->new_confirm(
alt_text => 'this is a confirm template',
text => 'confirm',
)->add_postback_action(
label => 'postback',
data => 'postback data',
text => 'postback message',
)->add_message_action(
label => 'message',
text => 'message',
)->add_uri_action(
label => 'uri',
uri => 'http://example.com/',
);
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_template($confirm->build);
$bot->reply_message($reply_token, $messages->build);
my $carousel = LINE::Bot::API::Builder::TemplateMessage->new_carousel(
alt_text => 'this is a carousel template',
);
for my $i (1..5) {
my $column = LINE::Bot::API::Builder::TemplateMessage::Column->new(
image_url => 'https://example.com/bot/images/item.jpg',
title => "carousel $i",
text => "description $i",
)->add_postback_action(
label => 'postback',
data => 'postback data',
text => 'postback message',
)->add_message_action(
label => 'message',
text => 'message',
)->add_uri_action(
label => 'uri',
uri => 'http://example.com/',
);
$carousel->add_column($column->build);
}
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_template($carousel->build);
$bot->reply_message($reply_token, $messages->build);
Copyright 2016 LINE Corporation
This Software Development Kit is licensed under The Artistic License 2.0. You may obtain a copy of the License at https://opensource.org/licenses/Artistic-2.0