Puppeteer를 사용하여 HTML을 PDF로 변환하는 Next.js API 만들기(Vercel 호환)

npm install @sparticuz/chromium-min puppeteer-core

{
  "dependencies": {
    "@sparticuz/chromium-min": "^129.0.0",
    "puppeteer-core": "^23.5.0"
  }
}

const chromium = require("@sparticuz/chromium-min");
const puppeteer = require("puppeteer-core");

async function getBrowser() {
  return puppeteer.launch({
    args: [...chromium.args, "--hide-scrollbars", "--disable-web-security"],
    defaultViewport: chromium.defaultViewport,
    executablePath: await chromium.executablePath(
      `https://github.com/Sparticuz/chromium/releases/download/v129.0.0/chromium-v129.0.0-pack.tar`
    ),
    headless: chromium.headless,
    ignoreHTTPSErrors: true
  });
}

export async function POST(request) {
  try {
    const { html } = await request.json();

    const browser = await getBrowser();
    const page = await browser.newPage();
    await page.setContent(html, { waitUntil: "networkidle0" });
    const pdfBuffer = await page.pdf({
      format: "A4",
      printBackground: true,
      margin: { top: "1cm", right: "1cm", bottom: "1cm", left: "1cm" }
    });
    await browser.close();

    return new Response(pdfBuffer, {
      headers: {
        "Content-Type": "application/pdf",
        "Content-Disposition": 'attachment; filename="output.pdf"'
      }
    });
  } catch (error) {
    console.error("Error generating PDF:", error);
    return new Response(JSON.stringify({ error: "Failed to generate PDF" }), {
      status: 500,
      headers: { "Content-Type": "application/json" }
    });
  }
}

async function getBrowser() {
  return puppeteer.launch({
    args: [...chromium.args, "--hide-scrollbars", "--disable-web-security"],
    defaultViewport: chromium.defaultViewport,
    executablePath: await chromium.executablePath(
      `https://github.com/Sparticuz/chromium/releases/download/v129.0.0/chromium-v129.0.0-pack.tar`
    ),
    headless: chromium.headless,
    ignoreHTTPSErrors: true
  });
}

const response = await fetch('/api/html-to-pdf', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ html: '<h1>Hello, World!</h1>' }),
});

if (response.ok) {
  const blob = await response.blob();
  // Handle the PDF blob (e.g., download or display)
}