Vercel vs Cloudflare (Workers + Pages) 比較

// Vercel — Next.js 16 App Router、Cache Components(PPRがデフォルト)+ オンデマンドパージ
// next.config.ts
import type { NextConfig } from "next";

const nextConfig: NextConfig = {
  cacheComponents: true,
};

export default nextConfig;

// app/blog/[slug]/page.tsx — 'use cache' + cacheTagでキャッシュされるデータ
import { cacheTag } from "next/cache";

async function getPost(slug: string) {
  "use cache";
  cacheTag(`post-${slug}`);
  const res = await fetch(`https://api.example.com/posts/${slug}`);
  return res.json();
}

export default async function BlogPost({
  params,
}: {
  params: Promise<{ slug: string }>;
}) {
  const { slug } = await params;
  const post = await getPost(slug);

  return (
    <article>
      <h1>{post.title}</h1>
      <div dangerouslySetInnerHTML={{ __html: post.html }} />
    </article>
  );
}

// app/api/revalidate/route.ts — オンデマンドパージ(Vercel Data Cache)
// "max" = stale-while-revalidate;Webhookで即座に無効化するには { expire: 0 }
import { revalidateTag } from "next/cache";
import { NextRequest, NextResponse } from "next/server";

export async function POST(req: NextRequest) {
  const { slug } = await req.json();
  revalidateTag(`post-${slug}`, "max");
  return NextResponse.json({ revalidated: true });
}

// vercel.json — リージョン設定と関数のタイムアウト
{
  "regions": ["fra1"],
  "functions": {
    "app/api/revalidate/route.ts": { "maxDuration": 10 }
  }
}

// デプロイ
// $ vercel --prod

// Cloudflare — Next.js 16をWorkersにデプロイ(vinext、公式デフォルトの方法)
// 1) まず互換性を測定し、その後プロジェクトに追加(Vite設定はvinext initが生成)
// $ npx vinext check
// $ npx vinext init

// vite.config.ts — ルートレベルのISRにはWorkers Cache、データキャッシュにはKV
import { cloudflare } from "@cloudflare/vite-plugin";
import { cdnAdapter } from "@vinext/cloudflare/cache/cdn-adapter";
import { kvDataAdapter } from "@vinext/cloudflare/cache/kv-data-adapter";
import { defineConfig } from "vite";
import vinext from "vinext";

export default defineConfig({
  plugins: [
    vinext({
      // cdnAdapter yalnız wrangler.jsonc'de "cache": { "enabled": true } iken çalışır
      cache: { cdn: cdnAdapter(), data: kvDataAdapter() },
    }),
    cloudflare({
      viteEnvironment: { name: "rsc", childEnvironments: ["ssr"] },
    }),
  ],
});

// デプロイ — Worker設定は自動生成される
// $ npx @vinext/cloudflare deploy

// 代替案: OpenNextアダプター — open-next.config.ts
import { defineCloudflareConfig } from "@opennextjs/cloudflare";
import r2IncrementalCache from "@opennextjs/cloudflare/overrides/incremental-cache/r2-incremental-cache";

export default defineCloudflareConfig({ incrementalCache: r2IncrementalCache });
// $ opennextjs-cloudflare build && opennextjs-cloudflare deploy

// Access for Workers — WorkerをAccessアプリケーションに紐付け
// POST /accounts/{account_id}/access/apps
// "destinations": [{ "type": "worker", "worker_id": "<worker-id>" }]