I want to store PDF using postgresql bytea in Node.js - node.js

Question

I want to store PDF using PostgreSQL bytea in Node.js
How can I convert PDF to datatype bytea ?
My code is:
request.get('https://www.cbconnexus.com/upload/settings/black/data.pdf', function (error, response, body) {
if (!error && response.statusCode == 200) {
data = "data:" + response.headers["content-type"] + ";base64," + Buffer.from(body).toString('base64');
console.log(data);
}
});

Answer 1

A node http server accepting a post of a PDF and storing it in a postgresql table. Listens on fixed IP address 192.168.1.3, port 8888 by default but you can specify the port as the first parameter.
Uses pg and formidable.
var myArgs = process.argv.slice(2);
var http = require('http');
var fs = require('fs');
var port = 8888;
const { IncomingForm } = require('formidable');
const { Client } = require('pg');
const dbc = new Client({
host: '127.0.0.1',
user: 'ghp',
password: 'zevrepdm',
database: 'ghp',
port: 5434,
});
dbc.connect();
if (myArgs[0]) {
port = myArgs[0];
}
http.createServer(function (req, res) {
const chunks = [];
if (req.url === '/' && req.method.toLowerCase() === 'post') {
const form = new IncomingForm({ multiples: true });
form.parse(req, (err, fields, files) => {
if (files.userfile.type == "application/pdf") {
var rawData = fs.readFileSync(files.userfile.path) ;
dbc
.query(
'insert into files(name,type,size,data) values ($1,$2,$3,$4)'
+ ' returning name',
[ files.userfile.name, files.userfile.type, files.userfile.size,
rawData ]
).then(res => {
var insMessage = 'file ' + res.rows[0].name + ' inserted' ;
console.log( insMessage );
}).catch(err => {
var insMessage = 'Error inserting file ' + files.userfile.name ;
console.error( insMessage );
console.error( err.stack );
});
}
});
}
req.on('data', chunk => chunks.push(chunk));
req.on('end', () => {
res.writeHead(200, [['Content-Type', 'text/html'],
['Cache-Control', 'maxage=120, s-maxage=60, public'],
['X-Accel-Expires', '86400'],
['X-BEVar', req.url] ]);
res.write('Hello ' + req.headers['user-agent'] + '!<br>');
res.write('<br>I\'m the one listening on port ' + port + '!<br>');
res.write(" <FORM ACTION='");
res.write(req.url);
res.write("' METHOD='post' enctype='multipart/form-data'> \
<input type='hidden' name='MAX_FILE_SIZE' value='128000000'> \
<input name='userfile' type='file' size='50'> \
<input type='submit' value='Send File'> \
</FORM>");
res.end('Do you know it\'s already ' + Date() + '?');
})
}).listen(port,"192.168.1.3");