Cloudflare Workers: Claude Code 활용 가이드

Cloudflare Workers개발をClaude Code로 가속화하기

Cloudflare Workersは、Cloudflareのグローバル네트워크上でJavaScript/TypeScriptを実行できる서버리스プラット폼です。V8エンジンをベースとし、コールドスタートゼロで高速な응답を実現します。Claude Codeを활용すれば、Workers特有のAPIやバインディングも효율적으로扱えます。

프로젝트の立ち上げ

> Cloudflare Workersの프로젝트를 생성해줘。
> Hono프레임워크とD1데이터베이스를 사용하는구성で。

npm create cloudflare@latest my-worker -- --template=hello-world
cd my-worker
npm install hono

# wrangler.toml
name = "my-api"
main = "src/index.ts"
compatibility_date = "2024-12-01"

[[d1_databases]]
binding = "DB"
database_name = "my-database"
database_id = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"

[[kv_namespaces]]
binding = "CACHE"
id = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

[[r2_buckets]]
binding = "STORAGE"
bucket_name = "my-bucket"

Hono를 사용한API구현

> Hono프레임워크でCRUD APIを作って。
> D1데이터베이스との연동も구현して。

// src/index.ts
import { Hono } from 'hono';
import { cors } from 'hono/cors';
import { jwt } from 'hono/jwt';

type Bindings = {
  DB: D1Database;
  CACHE: KVNamespace;
  STORAGE: R2Bucket;
  JWT_SECRET: string;
};

const app = new Hono<{ Bindings: Bindings }>();

app.use('/api/*', cors());

// 글목록
app.get('/api/posts', async (c) => {
  const { results } = await c.env.DB.prepare(
    'SELECT * FROM posts ORDER BY created_at DESC LIMIT 20'
  ).all();

  return c.json({ posts: results });
});

// 글생성
app.post('/api/posts', async (c) => {
  const { title, content } = await c.req.json();

  const result = await c.env.DB.prepare(
    'INSERT INTO posts (title, content, created_at) VALUES (?, ?, datetime())'
  )
    .bind(title, content)
    .run();

  // 캐시の클리어
  await c.env.CACHE.delete('posts:latest');

  return c.json({ id: result.meta.last_row_id }, 201);
});

// 이미지업로드（R2）
app.post('/api/upload', async (c) => {
  const formData = await c.req.formData();
  const file = formData.get('file') as File;

  if (!file) {
    return c.json({ error: 'File required' }, 400);
  }

  const key = `uploads/${Date.now()}-${file.name}`;
  await c.env.STORAGE.put(key, file.stream(), {
    httpMetadata: { contentType: file.type },
  });

  return c.json({ key, url: `/api/files/${key}` });
});

export default app;

D1데이터베이스の마이그레이션

-- migrations/0001_create_tables.sql
CREATE TABLE IF NOT EXISTS posts (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  title TEXT NOT NULL,
  content TEXT NOT NULL,
  slug TEXT UNIQUE,
  published BOOLEAN DEFAULT FALSE,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
  updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX idx_posts_slug ON posts(slug);
CREATE INDEX idx_posts_published ON posts(published, created_at);

# マイグレーションの実行
npx wrangler d1 migrations apply my-database

# ローカル開発
npx wrangler d1 migrations apply my-database --local
npx wrangler dev

KV캐시の활용

// src/cache.ts
export async function getCachedData<T>(
  kv: KVNamespace,
  key: string,
  fetcher: () => Promise<T>,
  ttl = 3600
): Promise<T> {
  const cached = await kv.get(key, 'json');
  if (cached) return cached as T;

  const data = await fetcher();
  await kv.put(key, JSON.stringify(data), { expirationTtl: ttl });
  return data;
}

// Usage example
app.get('/api/stats', async (c) => {
  const stats = await getCachedData(
    c.env.CACHE,
    'stats:daily',
    async () => {
      const { results } = await c.env.DB.prepare(
        'SELECT COUNT(*) as count FROM posts WHERE published = TRUE'
      ).all();
      return results[0];
    },
    300 // 5分캐시
  );

  return c.json(stats);
});

배포と모니터링

# デプロイ
npx wrangler deploy

# ログの確認
npx wrangler tail

# シークレットの設定
npx wrangler secret put JWT_SECRET

정리

Cloudflare Workersの充実したバインディングとClaude Codeを組み合わせれば、엣지で動作する풀스택APIを효율적으로구축할 수 있습니다。서버리스함수가이드や엣지コンピューティング入門도 참고하세요.

Cloudflare Workers의 상세 정보는Cloudflare Workers공식 문서를 참고하세요.