7701edd657
templates.js and renderer.js content extracted via direct line-slicing (not retyped) given their size (~660-line HTML/CSS template functions) -- avoids transcription risk on template-literal-heavy code. Verified via smoke-test harness (28/28 match). server.js: 4492 -> 3784 lines (6838 originally -- 45% reduction so far).
66 lines
2.2 KiB
JavaScript
66 lines
2.2 KiB
JavaScript
// PDF Export: lazy puppeteer loader + response cache + renderer
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// ── PDF Export: lazy puppeteer loader ────────────────────────────────────────
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let _puppeteerBrowser = null;
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let _puppeteerLoading = false;
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async function getPuppeteerBrowser() {
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if (_puppeteerBrowser) return _puppeteerBrowser;
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if (_puppeteerLoading) {
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// Wait for in-flight launch
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await new Promise(r => setTimeout(r, 2000));
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return _puppeteerBrowser;
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}
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_puppeteerLoading = true;
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try {
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const puppeteer = require("puppeteer");
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_puppeteerBrowser = await puppeteer.launch({
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headless: true,
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args: ["--no-sandbox", "--disable-setuid-sandbox", "--disable-dev-shm-usage", "--disable-gpu"]
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});
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console.log("[PDF] Puppeteer browser launched");
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_puppeteerBrowser.on("disconnected", () => {
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console.log("[PDF] Browser disconnected — will relaunch on next request");
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_puppeteerBrowser = null;
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_puppeteerLoading = false;
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});
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} catch (e) {
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console.error("[PDF] Puppeteer unavailable:", e.message);
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_puppeteerBrowser = null;
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}
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_puppeteerLoading = false;
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return _puppeteerBrowser;
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}
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// PDF response cache: key = "asn:format" or "compare:asn1:asn2" → {buf, ts}
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const pdfCache = new Map();
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const PDF_CACHE_TTL = 5 * 60 * 1000; // 5 minutes
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function pdfCacheGet(key) {
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const e = pdfCache.get(key);
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if (e && (Date.now() - e.ts) < PDF_CACHE_TTL) return e.buf;
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return null;
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}
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function pdfCacheSet(key, buf) {
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if (pdfCache.size > 100) pdfCache.delete(pdfCache.keys().next().value);
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pdfCache.set(key, { buf, ts: Date.now() });
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}
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async function renderHtmlToPdf(html) {
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const browser = await getPuppeteerBrowser();
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if (!browser) throw new Error('PDF renderer unavailable (puppeteer not installed)');
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const page = await browser.newPage();
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try {
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await page.setContent(html, { waitUntil: 'domcontentloaded', timeout: 15000 });
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const buf = await page.pdf({
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format: 'A4',
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printBackground: true,
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margin: { top: '18mm', bottom: '18mm', left: '16mm', right: '16mm' },
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});
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return buf;
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} finally {
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await page.close();
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}
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}
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module.exports = { getPuppeteerBrowser, pdfCacheGet, pdfCacheSet, renderHtmlToPdf };
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