问题描述
我开发了一种功能，该功能接受一页HTML，使用htmp-pdf软件包将其转换为PDF，然后上传到Firebase存储。当我从我的PC运行此功能时，它花费不到5秒，但是当我从Firebase功能运行时，它需要花费6分钟。这是代码：
pdf.create(estadoCuenta,{ orientation: 'portrait',type: 'pdf',timeout: '360000' }).toStream(function(err,stream) {
console.log('Nombre del archivo generado: ' + file.name);
stream.pipe(file.createWriteStream({
Metadata: {
contentType: 'application/pdf',Metadata: {
origin: 'created by ...'
}
},public: true,validation: "md5"
}))
.on('error',function(err) {
console.log('error en la carga de archivo: ' + err);
})
.on('finish',function() {
// The file upload is complete.
let estadoCuentaPDF = file.name.replace('/','%2F');
console.log('estadoCuentaPDF:' + estadoCuentaPDF);
});
});
变量“ estadoCuenta”包含要转换的html。
这是我的package.json：
{
"name": "dialogflowFirebaseFulfillment","description": "This is the default fulfillment for a Dialogflow agents using Cloud Functions for Firebase","version": "0.0.1","author": "xxx","repository": "https://yyy@bitbucket.org/zzz/www.git","license": "xxx","private": true,"scripts": {
"start": "firebase serve --only functions:dialogflowFirebaseFulfillment","deploy": "firebase deploy --only functions:dialogflowFirebaseFulfillment"
},"engines": {
"node": "10"
},"dependencies": {
"-": "0.0.1","@google-cloud/firestore": "^3.7.5","actions-on-google": "^2.10.0","cors": "^2.8.5","dialogflow": "^1.2.0","dialogflow-fulfillment": "^0.6.1","dotenv": "^8.2.0","envfile": "^6.9.0","express": "^4.17.1","firebase-admin": "^8.0.0","firebase-functions": "^3.6.1","firebase-tools": "^7.4.0","html-pdf": "^2.2.0","isomorphic-fetch": "^2.2.1","node-env-file": "^0.1.8","nodejs-base64": "^1.0.3","nodemailer": "^6.3.0","pg": "^7.18.2","string-similarity": "^3.0.0","twilio": "^3.31.1","unirest": "^0.6.0"
}
}
非常感谢您的帮助。
解决方法
这是因为分配给功能的计算资源无法与您的本地设备相比。
云功能上的CPU速度与此document中提到的分配的内存成正比，请尝试为您的功能设置2GB内存。
拥有更多处理资源，您的功能将更快。
如果该功能没有在可接受的时间内响应您，则下一步是使用另一种无服务器产品，例如App Engine或Cloud Run，该产品允许您为应用程序设置更多资源。 / p>
这些更改将影响您的账单。
,我调整了您的示例，它对我非常有用，因为它的HTML文件非常小，内存分配为256MB。我保留了您的包裹，以尝试重新使用。我使用了一个内联的非常小的HTML文档，使用了Node.JS 12并替换了例如file与fs。我不是Node.JS开发人员，所以对糟糕的代码表示歉意。
/* jshint esversion: 6 */
/* globals exports,require */
const pdf = require("html-pdf");
const fs = require("fs");
const estadoCuenta = `<html><head><title>Stackoverflow: 63688028</title></head><body><div id="content">Hello Freddie!</div></body></html>`;
const convertor = (req,res) => {
// Write it
const options = { orientation: 'portrait',type: 'pdf',timeout: '360000' };
pdf.create(estadoCuenta,options).toStream(function (err,stream) {
var writeStream = fs.createWriteStream("/tmp/file.pdf");
stream.pipe(writeStream).on('error',function (err) {
console.log(`[stream.pipe] Error: ${err}`);
}).on('finish',function () {
// Read it
var readStream = fs.createReadStream('/tmp/file.pdf');
var filename = encodeURIComponent("converted.pdf");
res.setHeader('Content-disposition',`inline; filename="${filename}"`);
res.setHeader('Content-type','application/pdf');
readStream.pipe(res);
console.log(`Done`);
});
});
};
exports.convertor = convertor;
对于本地调试，我添加了以下内容：
const express = require("express");
const app = express();
const port = 3000;
app.get("/",convertor);
app.listen(port,() => {
console.log(`Listening: http://localhost:${port}`);
});
package.json中有很多依赖项，我想您都需要它们。部署到Cloud Functions时，无需导入express。
注意 html-pdf包括严重的外伤：
=== npm audit security report ===
Manual Review
Some vulnerabilities require your attention to resolve
Visit https://go.npm.me/audit-guide for additional guidance
Critical Arbitrary File Read
Package html-pdf
Patched in No patch available
Dependency of html-pdf
Path html-pdf
More info https://npmjs.com/advisories/1095
found 1 critical severity vulnerability in 750 scanned packages
1 vulnerability requires manual review. See the full report for details.