NO-ISSUE No need to allow nil

Author: Yang-33

examples/v2/echobot/Gemfile.lock

@@ -2,7 +2,8 @@ PATH
   remote: ../../..
   specs:
     line-bot-api (0.0.1.pre.test)
-      multipart-post (~> 2.4.1)
+      base64 (~> 0.2)
+      multipart-post (~> 2.4)
 
 GEM
   remote: https://rubygems.org/

examples/v2/echobot/README.md

@@ -2,13 +2,13 @@
 An example LINE bot just to echo messages
 
 ## Getting started
-```ruby
+This projects tries to set `${APP_BASE_URL}/callback` as webhook URL automatically on starting app.
+
+```sh
 $ export LINE_CHANNEL_SECRET=YOUR_CHANNEL_SECRET
 $ export LINE_CHANNEL_ACCESS_TOKEN=YOUR_CHANNEL_ACCESS_TOKEN
 $ bundle install
+$ export APP_BASE_URL="https://your.base.url:4567"
 $ bundle exec ruby app.rb
 ```
 
-```
-https://127.0.0.1:4567/callback
-```

examples/v2/echobot/app.rb

@@ -2,6 +2,7 @@
 require 'line-bot-api'
 
 set :environment, :production
+set :app_base_url, ENV.fetch('APP_BASE_URL')
 
 def client
   @client ||= Line::Bot::V2::MessagingApi::ApiClient.new(
@@ -13,6 +14,19 @@ def parser
   @parser ||= Line::Bot::V2::WebhookParser.new(channel_secret: ENV.fetch("LINE_CHANNEL_SECRET"))
 end
 
+configure do
+  webhook_endpoint = "#{settings.app_base_url}/callback"
+  body, code, _ = client.set_webhook_endpoint_with_http_info(set_webhook_endpoint_request: Line::Bot::V2::MessagingApi::SetWebhookEndpointRequest.new(
+    endpoint: webhook_endpoint
+  ))
+
+  if code == 200
+    p "✅ LINE Webhook URL set to #{webhook_endpoint}"
+  else
+    p "❌ Failed to set LINE Webhook. code=#{code}, error body=#{body}"
+  end
+end
+
 post '/callback' do
   body = request.body.read
   signature = request.env['HTTP_X_LINE_SIGNATURE']

examples/v2/kitchensink/README.md

@@ -1,18 +1,14 @@
 # Kitchen Sink Bot
 
-A kitchen-sink LINE bot example
+A kitchen-sink LINE bot example. This contains many examples of line-bot-api gem's features.
 
 ## Getting started
+This projects tries to set `${APP_BASE_URL}/callback` as webhook URL automatically on starting app.
 
-```ruby
+```sh 
 $ export LINE_CHANNEL_SECRET=YOUR_CHANNEL_SECRET
 $ export LINE_CHANNEL_ACCESS_TOKEN=YOUR_CHANNEL_ACCESS_TOKEN
 $ bundle install
 $ export APP_BASE_URL="https://your.base.url:4567"
 $ bundle exec ruby app.rb
 ```
-
-Then set url as webhook url in https://developers.line.biz/console/
-```
-https://your.base.url:4567/callback
-```

examples/v2/kitchensink/app.rb

@@ -3,7 +3,7 @@
 require 'line-bot-api'
 
 set :environment, :production
-set :app_base_url, ENV.fetch('APP_BASE_URL', nil)
+set :app_base_url, ENV.fetch('APP_BASE_URL')
 
 THUMBNAIL_URL = 'https://via.placeholder.com/1024x1024'
 HORIZONTAL_THUMBNAIL_URL = 'https://via.placeholder.com/1024x768'
@@ -40,19 +40,15 @@ def parser
 end
 
 configure do
-  if settings.app_base_url
-    webhook_endpoint = "#{settings.app_base_url}/callback"
-    body, code, _ = client.set_webhook_endpoint_with_http_info(set_webhook_endpoint_request: Line::Bot::V2::MessagingApi::SetWebhookEndpointRequest.new(
-      endpoint: webhook_endpoint
-    ))
-
-    if code == 200
-      p "✅ LINE Webhook URL set to #{webhook_endpoint}"
-    else
-      p "❌ Failed to set LINE Webhook. code=#{code}, error body=#{body}"
-    end
+  webhook_endpoint = "#{settings.app_base_url}/callback"
+  body, code, _ = client.set_webhook_endpoint_with_http_info(set_webhook_endpoint_request: Line::Bot::V2::MessagingApi::SetWebhookEndpointRequest.new(
+    endpoint: webhook_endpoint
+  ))
+
+  if code == 200
+    p "✅ LINE Webhook URL set to #{webhook_endpoint}"
   else
-    p "⚠️ APP_BASE_URL is not set; skipping LINE Webhook auto-configuration."
+    p "❌ Failed to set LINE Webhook. code=#{code}, error body=#{body}"
   end
 end