Deploy pdf-api

.dockerignore

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+node_modules
+.git
+.env
+*.log

.env.example

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+# --- Authentication (set at least one before any public deploy) ---
+# RapidAPI sends this secret on every proxied request via the header
+# X-RapidAPI-Proxy-Secret. Set it so ONLY RapidAPI's gateway can reach you.
+RAPIDAPI_PROXY_SECRET=
+
+# Simple key for direct/local access. Clients send header: x-api-key: <value>
+API_KEY=
+
+# If BOTH are empty the API is OPEN (local testing only) and logs a warning.
+
+# Port the server listens on. Cloud Run / Render inject this automatically.
+PORT=8080

.gitignore

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+node_modules/
+.env
+*.log
+samples/

Dockerfile

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+# Base image ships Chromium matching Playwright 1.60.0 (keep both in sync).
+FROM mcr.microsoft.com/playwright:v1.60.0-jammy
+WORKDIR /app
+COPY package.json ./
+RUN npm install --omit=dev
+COPY . .
+# HF Spaces runs the container as UID 1000 and routes traffic to app_port (7860);
+# HOME must be writable for Chromium. (On Render, PORT is injected and overrides this.)
+ENV HOME=/tmp
+ENV PORT=7860
+EXPOSE 7860
+CMD ["npm", "start"]

README.md

@@ -1,12 +1,125 @@
 ---
-title: Pdf Api
-emoji: 👀
-colorFrom: yellow
-colorTo: yellow
+title: PDF API
+emoji: 📄
+colorFrom: indigo
+colorTo: blue
 sdk: docker
+app_port: 7860
 pinned: false
-license: other
-short_description: Developer API to generate invoices, PDFs, and screenshots fr
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# PDF API
+
+API sederhana untuk mengubah **HTML atau URL menjadi PDF**, ditenagai Express + Playwright (Chromium).
+Tujuan: dijual sebagai API di RapidAPI dengan biaya infra minimal.
+
+## Endpoint
+
+| Method | Path          | Auth   | Keterangan                                   |
+| ------ | ------------- | ------ | -------------------------------------------- |
+| GET    | `/health`     | publik | Cek status (untuk health check)              |
+| POST   | `/pdf`        | ya     | PDF dari `html` atau `url`                    |
+| POST   | `/screenshot` | ya     | Tangkapan layar (PNG/JPEG) dari `html`/`url` |
+
+Auth: kirim header `X-RapidAPI-Proxy-Secret` (lewat RapidAPI) atau `x-api-key`.
+
+Body `POST /pdf` (JSON):
+
+```json
+{ "html": "<h1>Halo</h1>", "format": "A4", "landscape": false }
+```
+
+Body `POST /screenshot` (JSON):
+
+```json
+{ "url": "https://example.com", "fullPage": true, "type": "png" }
+```
+
+Pakai **template + data** (Handlebars) untuk dokumen seperti invoice — pembeli cukup kirim data:
+
+```json
+{
+  "template": "<h1>Invoice {{number}}</h1>{{#each items}}<p>{{name}}: {{price}}</p>{{/each}}<b>Total: {{total}}</b>",
+  "data": { "number": "INV-001", "items": [{ "name": "Design", "price": "$50" }], "total": "$50" }
+}
+```
+
+Pilih salah satu dari `html`, `url`, atau `template` (+ `data`) — berlaku untuk `/pdf` dan `/screenshot`.
+
+Atau pakai **template bawaan** (`templateName`) — pembeli cukup kirim `data`, tanpa menyusun HTML. Tersedia: `invoice`.
+
+```json
+{
+  "templateName": "invoice",
+  "data": {
+    "company": { "name": "Acme Co", "email": "billing@acme.co" },
+    "client": { "name": "John Doe" },
+    "invoice": { "number": "INV-001", "date": "2026-06-01", "due": "2026-06-15" },
+    "items": [{ "description": "Design work", "quantity": 2, "price": "$25", "amount": "$50" }],
+    "subtotal": "$50", "tax": "$5", "total": "$55",
+    "notes": "Thank you!"
+  }
+}
+```
+
+Response: `application/pdf`, atau `image/png` | `image/jpeg` (binary).
+
+## Jalan lokal
+
+```bash
+npm install
+npx playwright install chromium   # unduh browser sekali saja
+npm start                          # default http://localhost:8080
+```
+
+Tes cepat (hasil tersimpan ke out.pdf):
+
+```bash
+curl -X POST http://localhost:8080/pdf \
+  -H "Content-Type: application/json" \
+  -d "{\"html\":\"<h1>Halo PDF</h1>\"}" \
+  --output out.pdf
+```
+
+## Deploy gratis (pilih salah satu)
+
+**Render / Railway / Fly.io / Google Cloud Run** — semuanya membaca `Dockerfile`:
+
+1. Push repo ini ke GitHub.
+2. Buat service baru dari repo, pilih environment **Docker**.
+3. Set environment variable `API_KEY` dengan nilai rahasia.
+
+Cloud Run cocok karena scale-to-zero (tidak ada tagihan saat sepi) dan free tier besar.
+
+## Integrasi RapidAPI
+
+1. Deploy dulu, catat URL publik backend (mis. `https://xxx.onrender.com`).
+2. Di RapidAPI: **Add New API** → arahkan Base URL ke backend Anda.
+3. Aktifkan opsi RapidAPI yang mengirim header rahasia `X-RapidAPI-Proxy-Secret`,
+   lalu ubah autentikasi backend untuk memverifikasi header itu (lihat catatan keamanan).
+4. Tetapkan paket harga (mis. freemium + bayar per request).
+
+## Keamanan
+
+Sudah terpasang:
+
+- **Autentikasi:** set `RAPIDAPI_PROXY_SECRET` (diverifikasi dari header
+  `X-RapidAPI-Proxy-Secret`) agar hanya gateway RapidAPI yang bisa mengakses
+  backend, dan/atau `API_KEY` (header `x-api-key`) untuk akses langsung.
+  Perbandingan rahasia memakai constant-time. Jika keduanya kosong, API TERBUKA
+  (hanya untuk tes lokal) dan server menampilkan peringatan saat start.
+- **Proteksi SSRF:** setiap request jaringan yang dibuat halaman (navigasi awal,
+  redirect, dan sub-resource) divalidasi; alamat privat/loopback/link-local
+  (termasuk metadata cloud `169.254.169.254`) serta skema non-http(s) seperti
+  `file:` diblokir.
+
+Disarankan sebelum skala besar:
+
+- **Timeout render** agar tidak mudah di-abuse (body HTML sudah dibatasi 2 MB).
+- **DNS rebinding:** validasi saat ini mengecek IP hasil resolve; untuk hardening
+  penuh, pin IP yang sudah divalidasi saat fetch.
+
+## Langkah berikutnya
+
+- Tambah opsi margin, ukuran halaman kustom, dan header/footer untuk PDF.
+- Tambah timeout render dan rate limiting agar tahan abuse.

package-lock.json

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+      "license": "MIT",
+      "engines": {
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+      "license": "MIT"
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+}

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "pdf-api",
+  "version": "0.1.0",
+  "private": true,
+  "description": "HTML/URL to PDF generation API",
+  "main": "src/index.js",
+  "scripts": {
+    "start": "node src/index.js"
+  },
+  "dependencies": {
+    "express": "4.22.2",
+    "handlebars": "4.7.9",
+    "playwright": "1.60.0"
+  }
+}

render.yaml

@@ -0,0 +1,12 @@
+services:
+  - type: web
+    name: pdf-api
+    runtime: docker
+    plan: free
+    region: singapore
+    healthCheckPath: /health
+    envVars:
+      # Set this secret in the Render dashboard (kept out of the repo).
+      # Use the SAME value as RapidAPI's proxy secret so only RapidAPI can reach the backend.
+      - key: RAPIDAPI_PROXY_SECRET
+        sync: false

src/index.js

@@ -0,0 +1,154 @@
+const express = require('express');
+const fs = require('fs');
+const path = require('path');
+const dns = require('dns').promises;
+const net = require('net');
+const crypto = require('crypto');
+const Handlebars = require('handlebars');
+const { chromium } = require('playwright');
+
+const app = express();
+app.use(express.json({ limit: '2mb' }));
+
+const API_KEY = process.env.API_KEY;
+const RAPIDAPI_PROXY_SECRET = process.env.RAPIDAPI_PROXY_SECRET;
+let browser;
+
+// Built-in templates: every .html in src/templates is registered by filename.
+const TEMPLATES_DIR = path.join(__dirname, 'templates');
+const TEMPLATES = {};
+if (fs.existsSync(TEMPLATES_DIR)) {
+  for (const f of fs.readdirSync(TEMPLATES_DIR)) {
+    if (f.endsWith('.html')) TEMPLATES[path.basename(f, '.html')] = fs.readFileSync(path.join(TEMPLATES_DIR, f), 'utf8');
+  }
+}
+
+// --- Auth -------------------------------------------------------------
+function safeEqual(a, b) {
+  if (typeof a !== 'string' || typeof b !== 'string') return false;
+  const ab = Buffer.from(a);
+  const bb = Buffer.from(b);
+  return ab.length === bb.length && crypto.timingSafeEqual(ab, bb);
+}
+
+function authorized(req) {
+  // No auth configured => allow (local/dev only).
+  if (!API_KEY && !RAPIDAPI_PROXY_SECRET) return true;
+  if (RAPIDAPI_PROXY_SECRET && safeEqual(req.get('x-rapidapi-proxy-secret'), RAPIDAPI_PROXY_SECRET)) return true;
+  if (API_KEY && safeEqual(req.get('x-api-key'), API_KEY)) return true;
+  return false;
+}
+
+// --- SSRF guard -------------------------------------------------------
+function isPrivateIp(ip) {
+  const v4 = ip.startsWith('::ffff:') ? ip.slice(7) : ip;
+  if (net.isIPv4(v4)) {
+    const [a, b] = v4.split('.').map(Number);
+    return (
+      a === 0 || a === 10 || a === 127 ||
+      (a === 169 && b === 254) || // link-local + cloud metadata
+      (a === 172 && b >= 16 && b <= 31) ||
+      (a === 192 && b === 168) ||
+      (a === 100 && b >= 64 && b <= 127) // CGNAT
+    );
+  }
+  const v6 = ip.toLowerCase();
+  return v6 === '::1' || v6 === '::' || v6.startsWith('fe80') || v6.startsWith('fc') || v6.startsWith('fd');
+}
+
+async function hostIsPrivate(hostname) {
+  if (net.isIP(hostname)) return isPrivateIp(hostname);
+  const records = await dns.lookup(hostname, { all: true });
+  return records.some((r) => isPrivateIp(r.address));
+}
+
+// Validate EVERY request the page makes (initial nav, redirects, sub-resources).
+// NOTE: a determined attacker could still attempt DNS rebinding between this
+// check and the actual fetch; pin the resolved IP if you need more hardening.
+async function installSsrfGuard(page) {
+  await page.route('**/*', async (route) => {
+    let u;
+    try { u = new URL(route.request().url()); } catch { return route.abort(); }
+    if (u.protocol === 'data:' || u.protocol === 'blob:' || u.protocol === 'about:') return route.continue();
+    if (u.protocol !== 'http:' && u.protocol !== 'https:') return route.abort();
+    try {
+      return (await hostIsPrivate(u.hostname)) ? route.abort() : route.continue();
+    } catch {
+      return route.abort();
+    }
+  });
+}
+
+// --- Routes -----------------------------------------------------------
+// Health check is public (no auth) so platforms can probe it.
+app.get('/health', (_req, res) => res.json({ status: 'ok' }));
+
+app.use((req, res, next) => (authorized(req) ? next() : res.status(401).json({ error: 'Unauthorized' })));
+
+// Shared: validate input, SSRF pre-check, open page, navigate, then `produce` output.
+async function render(req, res, produce) {
+  let { html, url, template, templateName, data } = req.body || {};
+  if (templateName) {
+    if (!TEMPLATES[templateName]) {
+      return res.status(400).json({ error: 'Unknown templateName. Available: ' + (Object.keys(TEMPLATES).join(', ') || 'none') });
+    }
+    template = TEMPLATES[templateName];
+  }
+  if (template) {
+    try {
+      html = Handlebars.compile(String(template))(data || {});
+    } catch (e) {
+      return res.status(400).json({ error: 'Template error: ' + e.message });
+    }
+  }
+  if (!html && !url) return res.status(400).json({ error: 'Provide "html", "url", "template", or "templateName".' });
+
+  // Fast pre-check for a clean error before launching a page.
+  if (url) {
+    try {
+      const u = new URL(url);
+      if (u.protocol !== 'http:' && u.protocol !== 'https:') throw new Error('Only http/https URLs are allowed.');
+      if (await hostIsPrivate(u.hostname)) throw new Error('Target address is not allowed.');
+    } catch (e) {
+      return res.status(400).json({ error: e.message });
+    }
+  }
+
+  const page = await browser.newPage();
+  try {
+    await installSsrfGuard(page);
+    await (url
+      ? page.goto(url, { waitUntil: 'networkidle' })
+      : page.setContent(html, { waitUntil: 'networkidle' }));
+    await produce(page);
+  } catch (err) {
+    res.status(500).json({ error: 'Render failed', detail: err.message });
+  } finally {
+    await page.close();
+  }
+}
+
+// POST /pdf         body: { html?, url?, format?, landscape? } -> application/pdf
+app.post('/pdf', (req, res) => render(req, res, async (page) => {
+  const { format = 'A4', landscape = false } = req.body;
+  const pdf = await page.pdf({ format, landscape, printBackground: true });
+  res.type('application/pdf').send(pdf);
+}));
+
+// POST /screenshot  body: { html?, url?, fullPage?, type?, width?, height? } -> image/png|jpeg
+app.post('/screenshot', (req, res) => render(req, res, async (page) => {
+  const { fullPage = false, type, width, height } = req.body;
+  if (width && height) await page.setViewportSize({ width: Number(width), height: Number(height) });
+  const jpeg = type === 'jpeg';
+  const img = await page.screenshot({ fullPage: !!fullPage, type: jpeg ? 'jpeg' : 'png' });
+  res.type(jpeg ? 'image/jpeg' : 'image/png').send(img);
+}));
+
+const PORT = process.env.PORT || 8080;
+chromium.launch({ args: ['--no-sandbox'] }).then((b) => {
+  browser = b;
+  if (!API_KEY && !RAPIDAPI_PROXY_SECRET) {
+    console.warn('WARNING: no API_KEY or RAPIDAPI_PROXY_SECRET set — API is OPEN. Do not expose publicly.');
+  }
+  app.listen(PORT, () => console.log(`PDF API listening on :${PORT}`));
+});

src/templates/invoice.html

@@ -0,0 +1,78 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8" />
+<style>
+  * { box-sizing: border-box; }
+  body { font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: #1f2937; margin: 0; padding: 40px; font-size: 14px; }
+  .header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 40px; }
+  .brand { font-size: 22px; font-weight: 700; color: #111827; }
+  .muted { color: #6b7280; }
+  h1 { font-size: 28px; margin: 0 0 4px; color: #111827; letter-spacing: 1px; }
+  .meta { text-align: right; }
+  .parties { margin-bottom: 32px; }
+  .label { text-transform: uppercase; font-size: 11px; letter-spacing: .5px; color: #9ca3af; margin-bottom: 6px; }
+  table { width: 100%; border-collapse: collapse; margin-bottom: 24px; }
+  th { text-align: left; font-size: 11px; text-transform: uppercase; letter-spacing: .5px; color: #6b7280; border-bottom: 2px solid #e5e7eb; padding: 10px 8px; }
+  td { padding: 12px 8px; border-bottom: 1px solid #f3f4f6; }
+  .right { text-align: right; }
+  .totals { width: 280px; margin-left: auto; }
+  .totals td { border: none; padding: 6px 8px; }
+  .totals .grand { font-size: 18px; font-weight: 700; color: #111827; border-top: 2px solid #e5e7eb; }
+  .notes { margin-top: 36px; color: #6b7280; font-size: 13px; }
+  .footer { margin-top: 40px; text-align: center; color: #9ca3af; font-size: 12px; }
+</style>
+</head>
+<body>
+  <div class="header">
+    <div>
+      <div class="brand">{{company.name}}</div>
+      {{#if company.address}}<div class="muted">{{company.address}}</div>{{/if}}
+      {{#if company.email}}<div class="muted">{{company.email}}</div>{{/if}}
+    </div>
+    <div class="meta">
+      <h1>INVOICE</h1>
+      {{#if invoice.number}}<div class="muted">#{{invoice.number}}</div>{{/if}}
+      {{#if invoice.date}}<div class="muted">Date: {{invoice.date}}</div>{{/if}}
+      {{#if invoice.due}}<div class="muted">Due: {{invoice.due}}</div>{{/if}}
+    </div>
+  </div>
+
+  <div class="parties">
+    <div class="label">Bill To</div>
+    <div><strong>{{client.name}}</strong></div>
+    {{#if client.address}}<div class="muted">{{client.address}}</div>{{/if}}
+    {{#if client.email}}<div class="muted">{{client.email}}</div>{{/if}}
+  </div>
+
+  <table>
+    <thead>
+      <tr>
+        <th>Description</th>
+        <th class="right">Qty</th>
+        <th class="right">Price</th>
+        <th class="right">Amount</th>
+      </tr>
+    </thead>
+    <tbody>
+      {{#each items}}
+      <tr>
+        <td>{{this.description}}</td>
+        <td class="right">{{this.quantity}}</td>
+        <td class="right">{{this.price}}</td>
+        <td class="right">{{this.amount}}</td>
+      </tr>
+      {{/each}}
+    </tbody>
+  </table>
+
+  <table class="totals">
+    {{#if subtotal}}<tr><td>Subtotal</td><td class="right">{{subtotal}}</td></tr>{{/if}}
+    {{#if tax}}<tr><td>Tax</td><td class="right">{{tax}}</td></tr>{{/if}}
+    <tr><td class="grand">Total</td><td class="right grand">{{total}}</td></tr>
+  </table>
+
+  {{#if notes}}<div class="notes">{{notes}}</div>{{/if}}
+  {{#if company.name}}<div class="footer">Thank you for your business — {{company.name}}</div>{{/if}}
+</body>
+</html>