Question

我要求HTML页面需要转换为PDF文件并发送PDF作为对节点中api调用的响应。为此，我使用wkhtmltopdf包将HTML转换为PDF。

app.js

var express = require("express");
var http= require("http");
var app = express();
var wkhtmltopdf = require('wkhtmltopdf');
var fs = require('fs');
var res1 = fs.createWriteStream('out2.pdf');


app.get('/', function (req, res) {
  res.send('Hello World!')
});


app.get('/getPDF',function(req, res){
    wkhtmltopdf('<h1>Test</h1><p>Hello world</p>').pipe(res1);
    res.setHeader('content-type', 'application/pdf');
    res.send(res1);

});

app.listen(3000, function () {
  console.log('Example app listening on port 3000!')
});

但它正在项目文件夹中创建out2.pdf。但是我无法在浏览器中将out2.pdf作为可下载文件而不是错误

错误

Example app listening on port 3000!
events.js:163
      throw er; // Unhandled 'error' event
      ^

Error: write after end
    at writeAfterEnd (_stream_writable.js:191:12)
    at WriteStream.Writable.write (_stream_writable.js:238:5)
    at Socket.ondata (_stream_readable.js:555:20)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:191:7)
    at readableAddChunk (_stream_readable.js:176:18)
    at Socket.Readable.push (_stream_readable.js:134:10)
    at Pipe.onread (net.js:563:20)

任何想法如何实现我的要求

Answer 1

尝试，

addView

将app.get('/getPDF',function(req, res){ res.setHeader('content-type', 'application/pdf'); wkhtmltopdf('<h1>Test</h1><p>Hello world</p>').pipe(res1).pipe(res); });的结果传输到wkhtmltopdf流。

如何在节点js中将文件作为响应发送到下载

1 个答案: