Line Messaging API: Push Message & Reply

# Workflow Description This workflow demonstrates how to use the **LINE Messaging API** to handle two scenarios: 1. Replying to a user's message using a **reply token**. 2. Sending a **push message** to a specific LINE user using their **user ID**. --- ## Key Features 1. **Webhook Integration**: Receives and processes incoming messages from LINE using a webhook. 2. **Conditional Logic**: Checks if the received event type is a message and handles it accordingly. 3. **Reply Message**: Automatically responds to the user's message using the LINE reply token. 4. **Push Message**: Sends a test message to a specific LINE user using their unique user ID. --- ## Pre-Configuration To simplify the setup process, create a **Header Auth** credential in n8n: - **Name**: `Authorization` - **Value**: `Bearer {line token}` This will authenticate all API requests to the LINE Messaging API. --- ## Node Configurations ### 1.1. Webhook from LINE Message - **Purpose**: Captures incoming events from the LINE Messaging API. - **Configuration**: - **HTTP Method**: `POST` - **Path**: `{n8n-webhook-page}` --- ### 1.2. If Condition - **Purpose**: Checks if the received event type is `message`. - **Configuration**: - **Condition**: - `{{ $json.body.events[0].type }} equals message` --- ### 1.3. Line: Reply with Token - **Purpose**: Replies to the user's message using the LINE reply token. - **Configuration**: - **Method**: `POST` - **URL**: `https://api.line.me/v2/bot/message/reply` - **JSON Body**: ```json { "replyToken": {{ $(Webhook from Line Message).item.json.body.events[0].replyToken }}, "messages": [ { "type": "text", "text": "Received: {{ $(Webhook from Line Message).item.json.body.events[0].message.text }}" } ] } ``` --- ### 2.1. Manual Trigger: Test Workflow - **Purpose**: Triggers the workflow for testing the push message functionality. - **Configuration**: No additional setup required. --- ### 2.2. Edit Fields - **Purpose**: Prepares the unique LINE user ID for the push message. - **Configuration**: - **Field**: - `line_uid`: `Uxxxxxxxxxxxx` --- ### 2.3. Line: Push Message - **Purpose**: Sends a test message to a specific LINE user. - **Configuration**: - **Method**: `POST` - **URL**: `https://api.line.me/v2/bot/message/push` - **JSON Body**: ```json { "to": {{ $json.line_uid }}, "messages": [ { "type": "text", "text": "Hello!" } ] } ```