v0.4.0: Remove free tier, add public demo endpoint with watermark
- Remove free account signup flow entirely - Add POST /v1/demo/html and /v1/demo/markdown (public, no auth) - Demo: 5 requests/hour per IP, 50KB body limit, watermarked PDFs - Landing page: interactive playground replaces 'Get Free API Key' - Pricing: Demo (free) + Pro (€9/mo), no more Free tier - /v1/signup returns 410 Gone with redirect to demo/pro - Keep /v1/recover for existing Pro users - Update JSON-LD, API discovery, verify page text
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DocFast Bot
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6 changed files with 299 additions and 240 deletions
25
src/index.ts
25
src/index.ts
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@ -13,7 +13,7 @@ import rateLimit from "express-rate-limit";
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import { convertRouter } from "./routes/convert.js";
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import { templatesRouter } from "./routes/templates.js";
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import { healthRouter } from "./routes/health.js";
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import { signupRouter } from "./routes/signup.js";
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import { demoRouter } from "./routes/demo.js";
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import { recoverRouter } from "./routes/recover.js";
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import { billingRouter } from "./routes/billing.js";
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import { authMiddleware } from "./middleware/auth.js";
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@ -58,7 +58,8 @@ app.use(compressionMiddleware);
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app.use((req, res, next) => {
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const isAuthBillingRoute = req.path.startsWith('/v1/signup') ||
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req.path.startsWith('/v1/recover') ||
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req.path.startsWith('/v1/billing');
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req.path.startsWith('/v1/billing') ||
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req.path.startsWith('/v1/demo');
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if (isAuthBillingRoute) {
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res.setHeader("Access-Control-Allow-Origin", "https://docfast.dev");
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@ -96,7 +97,14 @@ app.use(limiter);
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// Public routes
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app.use("/health", healthRouter);
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app.use("/v1/signup", signupRouter);
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app.use("/v1/demo", express.json({ limit: "50kb" }), pdfRateLimitMiddleware, demoRouter);
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app.use("/v1/signup", (_req, res) => {
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res.status(410).json({
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error: "Free accounts have been discontinued. Try our demo at POST /v1/demo/html or upgrade to Pro at https://docfast.dev",
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demo_endpoint: "/v1/demo/html",
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pro_url: "https://docfast.dev/#pricing"
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});
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});
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app.use("/v1/recover", recoverRouter);
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app.use("/v1/billing", billingRouter);
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@ -173,7 +181,7 @@ p{color:#7a8194;margin-bottom:24px;line-height:1.6}
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${apiKey ? `
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<div class="warning">⚠️ Save your API key securely. You can recover it via email if needed.</div>
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<div class="key-box" onclick="navigator.clipboard.writeText('${apiKey}');this.style.borderColor='#5eead4';setTimeout(()=>this.style.borderColor='#34d399',1500)">${apiKey}</div>
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<div class="links">100 free PDFs/month · <a href="/docs">Read the docs →</a></div>
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<div class="links">Upgrade to Pro for 5,000 PDFs/month · <a href="/docs">Read the docs →</a></div>
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` : `<div class="links"><a href="/">← Back to DocFast</a></div>`}
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</div></body></html>`;
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}
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@ -241,10 +249,11 @@ app.get("/api", (_req, res) => {
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name: "DocFast API",
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version: APP_VERSION,
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endpoints: [
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"POST /v1/signup/free — Get a free API key",
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"POST /v1/convert/html",
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"POST /v1/convert/markdown",
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"POST /v1/convert/url",
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"POST /v1/demo/html — Try HTML→PDF (no auth, watermarked, 5/hour)",
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"POST /v1/demo/markdown — Try Markdown→PDF (no auth, watermarked, 5/hour)",
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"POST /v1/convert/html — HTML→PDF (requires API key)",
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"POST /v1/convert/markdown — Markdown→PDF (requires API key)",
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"POST /v1/convert/url — URL→PDF (requires API key)",
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"POST /v1/templates/:id/render",
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"GET /v1/templates",
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"POST /v1/billing/checkout — Start Pro subscription",
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146
src/routes/demo.ts
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146
src/routes/demo.ts
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@ -0,0 +1,146 @@
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import { Router, Request, Response } from "express";
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import rateLimit from "express-rate-limit";
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import { renderPdf } from "../services/browser.js";
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import { markdownToHtml, wrapHtml } from "../services/markdown.js";
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import logger from "../services/logger.js";
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const router = Router();
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const WATERMARK_HTML = `<div style="position:fixed;bottom:0;left:0;right:0;background:rgba(52,211,153,0.92);color:#0b0d11;text-align:center;padding:8px;font-family:sans-serif;font-size:12px;font-weight:bold;z-index:999999;letter-spacing:0.3px;">Generated by DocFast — docfast.dev | Upgrade to Pro for clean PDFs</div>`;
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function injectWatermark(html: string): string {
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if (html.includes("</body>")) {
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return html.replace("</body>", WATERMARK_HTML + "</body>");
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}
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return html + WATERMARK_HTML;
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}
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// 5 requests per hour per IP
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const demoLimiter = rateLimit({
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windowMs: 60 * 60 * 1000,
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max: 5,
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message: { error: "Demo limit reached (5/hour). Get a Pro API key at https://docfast.dev for unlimited access." },
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standardHeaders: true,
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legacyHeaders: false,
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keyGenerator: (req) => req.ip || req.socket.remoteAddress || "unknown",
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});
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router.use(demoLimiter);
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interface DemoBody {
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html?: string;
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markdown?: string;
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css?: string;
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format?: string;
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landscape?: boolean;
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margin?: { top?: string; right?: string; bottom?: string; left?: string };
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printBackground?: boolean;
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filename?: string;
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}
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function sanitizeFilename(name: string): string {
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return name.replace(/[\x00-\x1f"\\\r\n]/g, "").trim() || "document.pdf";
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}
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// POST /v1/demo/html
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router.post("/html", async (req: Request & { acquirePdfSlot?: () => Promise<void>; releasePdfSlot?: () => void }, res: Response) => {
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let slotAcquired = false;
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try {
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const ct = req.headers["content-type"] || "";
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if (!ct.includes("application/json")) {
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res.status(415).json({ error: "Unsupported Content-Type. Use application/json." });
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return;
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}
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const body: DemoBody = typeof req.body === "string" ? { html: req.body } : req.body;
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if (!body.html) {
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res.status(400).json({ error: "Missing 'html' field" });
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return;
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}
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if (req.acquirePdfSlot) {
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await req.acquirePdfSlot();
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slotAcquired = true;
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}
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const fullHtml = body.html.includes("<html")
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? injectWatermark(body.html)
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: injectWatermark(wrapHtml(body.html, body.css));
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const pdf = await renderPdf(fullHtml, {
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format: body.format || "A4",
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landscape: body.landscape || false,
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printBackground: body.printBackground !== false,
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margin: body.margin || { top: "0", right: "0", bottom: "0", left: "0" },
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});
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const filename = sanitizeFilename(body.filename || "demo.pdf");
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res.setHeader("Content-Type", "application/pdf");
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res.setHeader("Content-Disposition", `attachment; filename="${filename}"`);
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res.setHeader("Content-Length", pdf.length);
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res.send(pdf);
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} catch (err: any) {
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if (err.message === "QUEUE_FULL") {
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res.status(503).json({ error: "Server busy. Please try again in a moment." });
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} else if (err.message === "PDF_TIMEOUT") {
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res.status(504).json({ error: "PDF generation timed out." });
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} else {
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logger.error({ err }, "Demo HTML conversion failed");
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res.status(500).json({ error: "PDF generation failed." });
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}
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} finally {
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if (slotAcquired && req.releasePdfSlot) req.releasePdfSlot();
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}
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});
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// POST /v1/demo/markdown
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router.post("/markdown", async (req: Request & { acquirePdfSlot?: () => Promise<void>; releasePdfSlot?: () => void }, res: Response) => {
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let slotAcquired = false;
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try {
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const ct = req.headers["content-type"] || "";
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if (!ct.includes("application/json")) {
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res.status(415).json({ error: "Unsupported Content-Type. Use application/json." });
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return;
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}
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const body: DemoBody = typeof req.body === "string" ? { markdown: req.body } : req.body;
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if (!body.markdown) {
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res.status(400).json({ error: "Missing 'markdown' field" });
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return;
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}
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if (req.acquirePdfSlot) {
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await req.acquirePdfSlot();
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slotAcquired = true;
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}
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const htmlContent = markdownToHtml(body.markdown);
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const fullHtml = injectWatermark(wrapHtml(htmlContent, body.css));
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const pdf = await renderPdf(fullHtml, {
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format: body.format || "A4",
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landscape: body.landscape || false,
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printBackground: body.printBackground !== false,
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margin: body.margin || { top: "0", right: "0", bottom: "0", left: "0" },
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});
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const filename = sanitizeFilename(body.filename || "demo.pdf");
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res.setHeader("Content-Type", "application/pdf");
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res.setHeader("Content-Disposition", `attachment; filename="${filename}"`);
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res.setHeader("Content-Length", pdf.length);
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res.send(pdf);
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} catch (err: any) {
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if (err.message === "QUEUE_FULL") {
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res.status(503).json({ error: "Server busy. Please try again in a moment." });
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} else if (err.message === "PDF_TIMEOUT") {
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res.status(504).json({ error: "PDF generation timed out." });
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} else {
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logger.error({ err }, "Demo markdown conversion failed");
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res.status(500).json({ error: "PDF generation failed." });
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}
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} finally {
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if (slotAcquired && req.releasePdfSlot) req.releasePdfSlot();
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}
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});
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export { router as demoRouter };
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