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 Business Center.
You can find the Channel secret and Channel access token on the Basic information page on the Channel Console which you can access from the LINE Business Center.
Use this documentation and the LINE Developers documentation to get you 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.
See also the API reference of this method: https://developers.line.biz/en/reference/messaging-api/#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.
The last parameter $options
is an HashRef with a list of key-values
pairs to fine-tune the behaviour of this message. At the moment, the
only defined configurable option is "retry_key"
, which requires an
UUID string for its value. See the section "Handling Retries" for
the meaning of this particular option.
For mor detail, read the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#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.
The last parameter $options
is an HashRef with a list of key-values
pairs to fine-tune the behaviour of this message. At the moment, the
only defined configurable option is "retry_key"
, which requires an
UUID string for its value. See the section "Handling Retries" for
the meaning of this particular option.
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#send-multicast-messages
Sends push messages to multiple users at any time.
my $messages = LINE::Bot::API::Builder::SendMessage->new;
$messages->add_text( text => 'Example push text' );
$bot->broadcast($messages->build);
The last parameter $options
is an HashRef with a list of key-values
pairs to fine-tune the behaviour of this message. At the moment, the
only defined configurable option is "retry_key"
, which requires an
UUID string for its value. See the section "Handling Retries" for
the meaning of this particular option.
See also the LINE Developers API reference of thi smethod: https://developers.line.biz/en/reference/messaging-api/#send-broadcast-message
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
by 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.
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-content
Gets the target limit for additional messages in the current month.
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-quota
Gets the number of messages sent in the current month.
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-consumption
Get the number of messages sent from LINE official account on a specified day.
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-number-of-delivery-messages
The argument is a HashRef with one pair of mandatory key-values;
{ date => "20191231" }
The formate of date is "yyyyMMdd", that is, year in 4 digits, month in 2 digits, and date-of-month in 2 digits.
The return value $res
is a response object with the following read-only accessors
(see the API documentation for the meaning of each.)
$res->status(); #=> Str
$res->broadcast(); #=> Num
$res->targeting(); #=> Num
Notice that the "status" does not mean HTTP status. To inspect actual
HTTP status, invoke $res-
http_status()>.
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;
say $ret->language;
}
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-profile
Retrieves the demographic attributes for a LINE Official Account's friends.
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-demographic
Get group user profile information.
my $ret = $bot->get_group_member_profile($group_id, $user_id);
if ($ret->is_success) {
say $ret->display_name;
say $ret->user_id;
say $ret->picture_url;
}
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-group-member-profile
Gets the count of members in a room. You can get the member in room count even if the user hasn't added the LINE Official Account as a friend or has blocked the LINE Official Account.
my $ret = $bot->get_member_in_room_count($room_id);
if ($ret->is_success) {
say $ret->count;
}
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-members-room-count
Gets the count of members in a group. You can get the member in group count even if the user hasn't added the LINE Official Account as a friend or has blocked the LINE Official Account.
my $ret = $bot->get_member_in_group_count($group_id);
if ($ret->is_success) {
say $ret->count;
}
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-members-group-count
Gets the group ID, group name, and group icon URL of a group where the LINE Official Account is a member.
my $ret = $bot->get_group_summary($group_id);
if ($ret->is_success) {
say $ret->group_id;
say $ret->group_name;
say $ret->picture_url;
}
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-group-summary
Get room user profile information. A room is like a group without a group name. The response is similar to get_group_member_profile.
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-room-member-profile
Gets the number of messages sent with the /bot/message/reply
endpoint.
The number of messages retrieved by this operation does not include the number of messages sent from LINE@ Manager.
The $date
parameter is "yyyyMMdd" format.
Gets the number of messages sent with the /bot/message/push
endpoint.
The number of messages retrieved by this operation does not include the number of messages sent from LINE@ Manager.
-
date
Date the messages were sent
Format: yyyyMMdd (Example: 20191231) Timezone: UTC+9
Gets the number of messages sent with the /bot/message/multicast
endpoint.
The number of messages retrieved by this operation does not include the number of messages sent from LINE@ Manager.
-
date
Date the messages were sent
Format: yyyyMMdd (Example: 20191231) Timezone: UTC+9
Gets the number of messages sent with the /bot/message/broadcast
endpoint.
The number of messages retrieved by this operation does not include the number of messages sent from LINE Official Account Manager.
-
date
Date the messages were sent
Format: yyyyMMdd (Example: 20191231) Timezone: UTC+9
This method corresponds to the API of Creating rich menu
One argument is needed: $rich_menu_object
, which is a plain HashRef representing rich menu object
This method corresponds to the API of Get rich menu
One argument is needed: $rich_menu_id -- which correspond to the
richMenuId property of the object returned by create_rich_menu
method.
This method corresponds to the API of Delete rich menu
One argument is needed: $rich_menu_id -- which correspond to the
richMenuId property of the object returned by create_rich_menu
method.
The return value is an empty RichMenu object -- only status code matters. Upon successful deletion, status code 200 is returned.
This method corresponds to the API of Get rich menu list
No arguments are needed.
This method corresponds to the API of Set default rich menu
One argument is needed: $rich_menu_id -- which correspond to the
richMenuId property of the object returned by create_rich_menu
method.
This method corresponds to the API of Get default rich menu ID
No arguments are needed. The return value is a RichMenu object with only one property: richMenuId.
This method corresponds to the API of Cancel default rich menu ID
This method corresponds to the API of Link rich menu to user
Both of $user_id
and $rich_menu_id
are required.
This method corresponds to the API of Link rich menu to multiple users
Both of $user_ids
and $rich_menu_id
are required. $user_ids
should be an ArrayRef of user ids, while $rich_menu_id
should be a
simple scalar.
This method corresponds to the API of Get rich menu ID of user
The argument $user_id
is mandatory. The return value is a RichMenu
object with only one property: richMenuId.
This method corresponds to the API of Unlink rich menu from user
The argument $user_id
is mandatory. The return value is an empty object.
This method corresponds to the API of Unlink rich menu from multiple users
The mandatory argument $user_ids
is an ArrayRef of user ids. The return value is an empty object.
This method corresponds to the API of: Issue Channel access token
The argument is a HashRef with two pairs of mandatory key-values:
{
client_id => "...",
client_secret => "...",
}
Both pieces of information can be accquired from the channel console.
When a 200 OK HTTP response is returned, a new token is issued. In this case, you may want to store the values in "access_token", "expires_in", and "token_type" attributes of the response object for future use.
Otherwise, you my examine the "error" attribute and "error_description" attribute for more information about the error.
This method corresponds to the API of: Issue Channel access token v2.1
The argument is a HashRef with a pair of mandatory key-values:
{
jwt => "...",
}
This method lets you use JWT assertion for authentication.
When a 200 OK HTTP response is returned, a new token is issued. In this case, you may want to store the values in "access_token", "expires_in", "token_type" and "key_id" attributes of the response object for future use.
Otherwise, you may examine the "error" attribute and "error_description" attribute for more information about the error.
This method corresponds to the API of: Get all valid channel access token key IDs v2.1
The argument is a HashRef with a pair of mandatory key-values:
{
jwt => "...",
}
This method is for getting all valid channel access token key IDs.
When a 200 OK HTTP response is returned, a new token is issued. In this case, you may want to store the values in "key_ids" attributes of the response object for future use.
Otherwise, you may examine the "error" attribute and "error_description" attribute for more information about the error.
This method corresponds to the API of: Revoke channel access token
The argument is a HashRef with one pair of mandatory key-values;
{ access_token => "..." }
Upon successful revocation, a 200 OK HTTP response is returned. Otherwise, you my examine the "error" attribute and "error_description" attribute for more information about the error.
This method corresponds to the API of: Get number of followers
The argument is a HashRef with one pair of mandatory key-values;
{ date => "20191231" }
The formate of date is "yyyyMMdd", that is, year in 4 digits, month in 2 digits, and date-of-month in 2 digits.
Upon successful invocation, a 200 OK HTTP response is returned. Otherwise, you my examine the "error" attribute and "error_description" attribute for more information about the error.
The return value $res
is a response object with the following read-only accessors
(see the API documentation for the meaning of each.)
$res->status(); #=> Str, one of: "ready", "unready", "out_of_service"
$res->followers(); #=> Num
$res->targetedReaches(); #=> Num
$res->blocks(); #=> Num
Notice that the "status" does not mean HTTP status. To inspect actual
HTTP status, invoke $res-
http_status()>.
Returns statistics about how users interact with narrowcast messages or broadcast messages sent from your LINE Official Account.
See also the LINE Developers API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-message-event
Sets the webhook endpoint to te given endpoint
, which should be an URL string.
See also the LINE Developer API reference of this method: https://developers.line.biz/en/reference/messaging-api/#set-webhook-endpoint-url
Return the information about webhook endpoint as an response object with following accessors:
$res = $api->get_webhook_endpoint_information();
$res->endpoint(); # URL as a string
$res->active(); # true or false
See also the LINE Developer API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-webhook-endpoint-information
Checks if the configured webhook endpoint can receive a test webhook event.
See also the LINE Developer API reference of this method: https://developers.line.biz/en/reference/messaging-api/#get-webhook-endpoint-information
See the LINE Developers API reference about Message objects
When the LINE::Bot::API::Builder::SendMessage
class is used, it is possible easily to build a send 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);
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 a text message with emojis inside:
my $message = LINE::Bot::API::Builder::SendMessage->new();
$message->add_text(
text => '$ LINE Emoji $',
emojis => [
+{
"index" => 0,
"productId" => "5ac1bfd5040ab15980c9b435",
"emojiId" => "001"
},
+{
"index" => 13,
"productId" => "5ac1bfd5040ab15980c9b435",
"emojiId" => "002"
}
]
);
Since 2020/04/16, text messages may contain LINE emojis. They are identified by (productId, emojiId). For more details about possible values as well as how to use these emojis, please read: https://developers.line.biz/en/reference/messaging-api/#text-message first.
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);
To build a message of imagemap type, you may use a helper module.
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);
An Imagemap message can contain a video area inside. Here is an example of one withe upper half being a video overlay:
my $imagemap_message = 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,
video => {
originalContentUrl => "https://example.com/video.mp4",
previewImageUrl => "https://example.com/video_preview.jpg",
area => {
x => 0,
y => 0,
width => 1040,
height => 585
}
}
)->build;
For more detail about Imagemap message, see: https://developers.line.biz/en/reference/messaging-api/#imagemap-message
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);
my $carousel = LINE::Bot::API::Builder::TemplateMessage->new_image_carousel(
alt_text => 'this is a image carousel template',
);
my $column1 = LINE::Bot::API::Builder::TemplateMessage::ImageColumn->new(
image_url => 'https://example.com/bot/images/item1.jpg',
)->add_postback_action(
label => 'postback',
data => 'postback data',
text => 'postback message',
);
$carousel->add_column($column1->build);
my $column2 = LINE::Bot::API::Builder::TemplateMessage::ImageColumn->new(
image_url => 'https://example.com/bot/images/item2.jpg',
)->add_message_action(
label => 'message',
text => 'message',
);
$carousel->add_column($column2->build);
my $column3 = LINE::Bot::API::Builder::TemplateMessage::ImageColumn->new(
image_url => 'https://example.com/bot/images/item3.jpg',
)->add_uri_action(
label => 'uri',
uri => 'http://example.com/',
);
$carousel->add_column($column3->build);
my $messages = LINE::Bot::API::Builder::SendMessage->new(
)->add_template($carousel->build);
$bot->reply_message($reply_token, $messages->build);
For many methods that sends outgoing messages, the last parameter
$options
is a HashRef with certain key-value pairs.
At the moment, the key 'retry_key' is recognized. It shall be provided to retry without causing duplicates.
For example, here's a short snippet to attemp to retry a push_message without resending duplicate messages:
my $k = create_UUID_as_string();
my $res = $bot->push_message(
$user_id,
$message,
{ 'retry_key' => $k }
);
unless ($res->is_success) {
while ($res->http_status ne '409') {
sleep(60);
$res = $bot->push_message(
$user_id,
$message,
{ 'retry_key' => $k }
);
}
}
The value of 'retry_key' must be an UUID string. The example above
uses the create_UUID_as_string()
function provided by UUID::Tiny
and should just work.
The value of 'retry_key' is essentially value of an HTTP header name 'X-Line-Retry-Key'. Read more about retrying a failed push_message at: https://developers.line.biz/en/reference/messaging-api/#retry-api-request
LINE Corporation.
Copyright 2016-2021
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
LINE::Bot::API::Event, https://developers.line.biz/, https://at.line.me/