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Line::Bot::API - SDK of the LINE Messaging API for Ruby.
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Line::Bot::API - SDK of the LINE Messaging API for Ruby.

About the LINE Messaging API

See the official API reference documentation for more information.



# app.rb
require 'sinatra'
require 'line/bot'

def client
  @client ||= { |config|
    config.channel_secret = ENV["LINE_CHANNEL_SECRET"]
    config.channel_token = ENV["LINE_CHANNEL_TOKEN"]

post '/callback' do
  body =

  signature = request.env['HTTP_X_LINE_SIGNATURE']
  unless client.validate_signature(body, signature)
    error 400 do 'Bad Request' end

  events = client.parse_events_from(body)
  events.each { |event|
    case event
    when Line::Bot::Event::Message
      case event.type
      when Line::Bot::Event::MessageType::Text
        message = {
          type: 'text',
          text: event.message['text']
        client.reply_message(event['replyToken'], message)
      when Line::Bot::Event::MessageType::Image, Line::Bot::Event::MessageType::Video
        response = client.get_message_content(event.message['id'])
        tf ="content")



Add this line to your application's Gemfile:

gem 'line-bot-api'

And then execute:

$ bundle

Or install it yourself as:

$ gem install line-bot-api


Copyright (C) 2016 LINE Corporation.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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