使用Socket.io + Puppeteer + Node.js用HTML和CSS创建PDF

问题描述

我目前正在尝试使用HTML的Node.js在服务器端创建PDF文件，而CSS仍在工作。然后，我想将其附加到我没有找到方法的电子邮件中，但遇到了一个更大的问题。

我是Node.js的新手，我无法使用函数。服务器端有我的代码。

const fs = require('fs');
const puppeteer = require('puppeteer')
const ConnectionPort = 8080;
const path = require('path');
const app = require('express')();
const http = require('http').createServer(app);
const io = require('socket.io')(http);

io.on('connection',(socket) => {

  console.log('a user connected'); 

  socket.on('disconnect',() => {
    console.log('user disconnected');   
  });
  socket.on('Creation of PDF Document',(PageHTML,NumberOfTheFile,HeadHTML) => {
    console.log('A creation was requested'); // I see that on the console
    (async function(){
      try{
        console.log('Got in the try') // I can't see that on the console
        const browser = await puppeteer.launch();
        const page = await browser.newPage();

        await page.setContent('<head>' + HeadHTML + '</head><body>' + PageHTML + '</body>');
        await page.emulateMedia('screen');
        await page.pdf({
          path: path.join(__dirname,'Files',NumberOfTheFile + '.pdf'),format: "Legal",printBackground: true
        });

        console.log('Creation done!');
        await browser.close();
        process.exit();

      } catch (e)
      {
        console.log('Error: ',e)
      }
    })
  });
  ///////////////   Other stuff I was going for that works   ////////////////////
  socket.on('Asking ID',() => {

    console.log('a user is trying to ask for an ID');

    var array = fs.readFileSync('ID_Liste.txt').toString().split("\n");
    var i = 0;
    
    for(i in array) 
    {
        console.log(array[i]);
    }
    
    var ID_BonCommande = parseInt(array[i]) + 1;
    
    fs.appendFile('ID_Liste.txt'," \n  \n  \n" + "Operation Time  : " + "\n" + Date() + "  \n\n"  + "ID_BonCommande : " + "\n"  + ID_BonCommande + '',function (err) {
     if (err) throw err;
     console.log('ID added : ' + ID_BonCommande);
    });

    
    io.emit('Reception ID',ID_BonCommande);
  });
////////////////////////////////////////////////////////////////////////////////
});

http.listen(ConnectionPort,() => {
  console.log('listening on *: ' +ConnectionPort );
});

这是我在客户端调用函数的方式：

 socket.emit('Creation of PDF Document',document.getElementById('Page').innerHTML,document.getElementById(NumberOfThePage).innerHTML,document.getElementsByTagName('head').innerHTML // I need the head for the CSS
);

function AddID()
{           
    socket.emit('Asking ID');   
}
        
var receive = function(ID_Receved){
        
document.getElementById('PlaceToPutID').innerHTML = ID_Receved.toString();
            
}
socket.on('Reception ID',receive)

The Youtube video that helped me

解决方法

我尝试过：

  socket.on('Creation of PDF Document',(PageHTML,NumberOfTheFile,HeadHTML) => {
    console.log('A creation was requested'); // can't go further
    
    async function Test(){
      try{
        console.log('Got in the try')
        const browser = await puppeteer.launch();
        const page = await browser.newPage();
    
        await page.setContent('<head>' + HeadHTML + '</head><body>' + PageHTML + '</body>');
        await page.emulateMedia('screen');
        await page.pdf({
          path: path.join(__dirname,'Files',NumberOfTheFile + '.pdf'),format: "Legal",printBackground: true
        });
    
        console.log('Creation done!');
    
      } catch (e)
      {
        console.log('Error: ',e)
      }
    }
    Test();
  });

它没有按预期工作...我没有在PDF上获取CSS，但是仍然可以。

我需要CSS才能真正使用它。我们可以这样在客户端使用标签名称样式吗？

document.getElementsByTagName('style').innerHTML

或任何可以将CSS传输到服务器的内容。我的CSS目前处于“样式”标签中，但我不确定这是正确的决定。

我走错了方向？

已编辑*

知道了！

我只是将样式标签放在主体中并能够使用它。

javascript nodemailer socket.io

使用Socket.io + Puppeteer + Node.js用HTML和CSS创建PDF

问题描述

解决方法

相关问答