使用 Laravel 9.0 建立 LINE Bot 聊天機器人

Laravel
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做法

建立專案。

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laravel new line-bot-laravel
cd line-bot-laravel

安裝 LINE Bot SDK 套件。

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composer require linecorp/line-bot-sdk:^7.6

安裝 laravel-dump-server 測試工具。

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composer require --dev beyondcode/laravel-dump-server

修改 .env 檔。

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LINE_CHANNEL_ACCESS_TOKEN=line-channel-access-token
LINE_CHANNEL_SECRET=line-channel-secret

建立控制器。

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artisan make:controller WebhookController

修改 WebhookController.php 檔。

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namespace App\Http\Controllers;

use Exception;
use Illuminate\Http\Request;
use LINE\LINEBot;
use LINE\LINEBot\Constant\HTTPHeader;
use LINE\LINEBot\Event\MessageEvent\TextMessage;
use LINE\LINEBot\HTTPClient\CurlHTTPClient;
use Symfony\Component\HttpFoundation\Response;

class WebhookController extends Controller
{
    function handleEvents(Request $request) {
        $channelToken = env('LINE_CHANNEL_ACCESS_TOKEN');
        $channelSecret = env('LINE_CHANNEL_SECRET');

        $httpClient = new CurlHTTPClient($channelToken);
        $bot = new LINEBot($httpClient, ['channelSecret' => $channelSecret]);

        $signature = $request->header(HTTPHeader::LINE_SIGNATURE);
        if (!$signature) {
            return response()->json(null, Response::HTTP_BAD_REQUEST);
        }

        try {
            $events = $bot->parseEventRequest($request->getContent(), $signature);
        } catch (Exception) {
            return response()->json(null, Response::HTTP_BAD_REQUEST);
        }

        collect($events)
            ->filter(fn ($event) => $event instanceof TextMessage)
            ->each(function ($event) use ($bot) {
                $replyText = $event->getText();
                try {
                    $bot->replyText($event->getReplyToken(), $replyText);
                } catch (Exception) {
                    response()->json(null, Response::HTTP_INTERNAL_SERVER_ERROR);
                }
            });

        return response()->json([], Response::HTTP_OK);
    }
}

修改 routes/api.php 檔。

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use App\Http\Controllers\WebhookController;
use Illuminate\Support\Facades\Route;

Route::post('/webhook', [WebhookController::class, 'handleEvents']);

啟動日誌工具。

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artisan dump-server

啟動本地伺服器。

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artisan server

使用 ngrok 指令，啟動一個 HTTP 代理伺服器，將本地埠映射到外部網址。

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ngrok http 8000

在 LINE 平台上，修改 Webhook URL：https://xxx.jp.ngrok.io/api/webhook

認證 Webhook URL，並使用手機測試訊息。

程式碼

參考資料