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refactor: implement server-side CMYK PDF caching and improve frontend export UI with dynamic DOM injection

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Lucas Rayan committed 2026-08-23 12:52:16 -03:00
1 parent afa1a6e027
commit d530356101
3 files changed
+120 -118
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app/api/export-cmyk/route.js
+25 -8
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@@ -23,10 +23,28 @@ export async function GET(request) {
}
const tmpDir = os.tmpdir();
const tmpRgbPdf = path.join(tmpDir, `espdocs-mod-${modulo}-${Date.now()}-rgb.pdf`);
const tmpCmykPdf = path.join(tmpDir, `espdocs-mod-${modulo}-${Date.now()}-cmyk.pdf`);
const cachedCmykPdf = path.join(tmpDir, `espdocs-cached-cmyk-mod-${modulo}.pdf`);
const htmlMtime = fs.statSync(htmlFile).mtimeMs;
// Se já foi gerado no /tmp e o HTML não mudou, entrega instantaneamente
if (fs.existsSync(cachedCmykPdf)) {
const cachedMtime = fs.statSync(cachedCmykPdf).mtimeMs;
if (cachedMtime >= htmlMtime) {
const cachedBuffer = fs.readFileSync(cachedCmykPdf);
return new NextResponse(cachedBuffer, {
status: 200,
headers: {
"Content-Type": "application/pdf",
"Content-Disposition": `attachment; filename="LASER-ESP32-Modulo-${modulo}-CMYK.pdf"`,
"Content-Length": cachedBuffer.length.toString()
}
});
}
}
const tmpRgbPdf = path.join(tmpDir, `espdocs-tmp-${modulo}-${Date.now()}-rgb.pdf`);
let browser = null;
try {
browser = await puppeteer.launch({
headless: "new",
@@ -40,15 +58,15 @@ export async function GET(request) {
const page = await browser.newPage();
await page.setViewport({ width: 1200, height: 1600, deviceScaleFactor: 2 });
await page.goto(`file://${htmlFile}`, { waitUntil: "networkidle0", timeout: 60000 });
await page.goto(`file://${htmlFile}`, { waitUntil: "load", timeout: 30000 });
// Aguarda o Paged.js concluir a montagem
await page.waitForFunction(() => {
const pages = document.querySelectorAll(".pagedjs_page");
return pages.length > 0 && !document.querySelector(".aviso-carregando");
}, { timeout: 30000 });
}, { timeout: 25000 });
await new Promise((r) => setTimeout(r, 1000));
await new Promise((r) => setTimeout(r, 600));
await page.pdf({
path: tmpRgbPdf,
@@ -62,10 +80,10 @@ export async function GET(request) {
browser = null;
// Converte para CMYK (DeviceCMYK / ISO Coated)
const gsCmd = `gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sColorConversionStrategy=CMYK -dProcessColorModel=/DeviceCMYK -dCompatibilityLevel=1.4 -sOutputFile="${tmpCmykPdf}" "${tmpRgbPdf}"`;
const gsCmd = `gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sColorConversionStrategy=CMYK -dProcessColorModel=/DeviceCMYK -dCompatibilityLevel=1.4 -sOutputFile="${cachedCmykPdf}" "${tmpRgbPdf}"`;
execSync(gsCmd, { stdio: "pipe" });
const pdfBuffer = fs.readFileSync(tmpCmykPdf);
const pdfBuffer = fs.readFileSync(cachedCmykPdf);
return new NextResponse(pdfBuffer, {
status: 200,
@@ -84,7 +102,6 @@ export async function GET(request) {
} finally {
if (browser) await browser.close();
if (fs.existsSync(tmpRgbPdf)) fs.unlinkSync(tmpRgbPdf);
if (fs.existsSync(tmpCmykPdf)) fs.unlinkSync(tmpCmykPdf);
}
}