HTML 转 PDF
我正在 AWS Lamda 上使用 Nodejs16 环境并将 HTML 转换为 PDF。
我使用了很多库，例如 puppeteer 和 chrome-aws-lambda。
puppeteer 正在本地或服务器上工作。但它不适用于 aws-lambda 或无服务器。
const chromium = require('chrome-aws-lambda');
const puppeteer = require('puppeteer-core');
exports.handler = async (event) => {
try {
const browser = await puppeteer.launch({
executablePath: await chromium.executablePath,
args: chromium.args,
headless: true,
});
const page = await browser.newPage();
await page.setContent("<html><body><h5>Hello World!</h5></body></html>")
const pdf = await page.pdf({
format: "A4",
path: "output.pdf"
});
return {statusCode: 200};
} catch (error) {
console.error(error);
return {statusCode: 500};
}
};
出现此错误
Failed to launch the browser process!\n/tmp/chromium: error while loading shared libraries: libnss3.so: cannot open shared object file: No such file or directory\n\n\nTROUBLESHOOTING:
您遇到的错误
(libnss3.so: cannot open shared object file: No such file or directory)要解决此问题，您可以尝试将必要的依赖项与 Lambda 函数捆绑在一起。这是代码的修改版本，其中包含所需的文件：
const chromium = require('chrome-aws-lambda');
const puppeteer = require('puppeteer-core');
const fs = require('fs');
exports.handler = async (event) => {
try {
// Ensure the required directories exist
fs.mkdirSync('/tmp/fonts', { recursive: true });
fs.mkdirSync('/tmp/chromium', { recursive: true });
// Copy fonts and chromium to /tmp
fs.copyFileSync('/opt/fonts/NotoSansCJKjp-Regular.otf', '/tmp/fonts/NotoSansCJKjp-Regular.otf');
fs.copyFileSync('/opt/chromium/headless_shell', '/tmp/chromium/headless_shell');
const browser = await puppeteer.launch({
executablePath: '/tmp/chromium/headless_shell',
args: [
'--disable-gpu',
'--disable-dev-shm-usage',
'--disable-software-rasterizer',
'--disable-features=site-per-process',
'--no-zygote',
'--single-process',
'--no-sandbox',
],
headless: true,
});
const page = await browser.newPage();
await page.setContent("<html><body><h5>Hello World!</h5></body></html>");
const pdf = await page.pdf({
format: "A4",
path: "/tmp/output.pdf", // Save the file in /tmp directory
});
// Perform any additional operations with the PDF if needed
await browser.close();
return {
statusCode: 200,
body: JSON.stringify('PDF generated successfully'),
};
} catch (error) {
console.error(error);
return {
statusCode: 500,
body: JSON.stringify('Internal Server Error'),
};
}
};
确保在 Lambda 部署包的
(NotoSansCJKjp-Regular.otf)/opt/fonts/headless_shell/opt/chromium/请务必小心处理依赖项，因为 Lambda 环境对部署包的大小有一些限制。目标是仅包含应用程序正常运行所需的必要文件和库。