Im struggling with uploading my pdf file to my server with nodejs help.
My code:
app.post("/sendFile", function(req, res) {
var stream = fs.createWriteStream(path.join(__dirname, 'public', req.body.name + ".pdf"));
stream.once('open', function () {
stream.write(req.body.file);
stream.end();
});
});
However, the file which is being uploaded, is a Blob. Nodejs docs say that .write function accepts <string> | <Buffer> | <Uint8Array> as the first argument. Will it acept also a Blob? If not, which other function should I use to properly upload a Blob into my server?
Thank you.
Edit: or maybe I should change Blob into something else?
Im struggling with uploading my pdf file to my server with nodejs help.
My code:
app.post("/sendFile", function(req, res) {
var stream = fs.createWriteStream(path.join(__dirname, 'public', req.body.name + ".pdf"));
stream.once('open', function () {
stream.write(req.body.file);
stream.end();
});
});
However, the file which is being uploaded, is a Blob. Nodejs docs say that .write function accepts <string> | <Buffer> | <Uint8Array> as the first argument. Will it acept also a Blob? If not, which other function should I use to properly upload a Blob into my server?
Thank you.
Edit: or maybe I should change Blob into something else?
-
@JC97 I dont want to encode my
Blobinto base64. It will be an overkill (hundreds of bits which need to be stored somewhere) – Patrickkx Commented Aug 13, 2018 at 14:57 -
1
It appears you might be using
express. If so, are you usingmulterto process the upload? – Jason Cust Commented Aug 13, 2018 at 15:06 -
@JasonCust I edited my post, thats all I have there. Should I include
multer? Will it help me? – Patrickkx Commented Aug 13, 2018 at 15:56 - 1 May be it is resolved in: stackoverflow./questions/39677993/… – Cesar Morillas Commented Nov 11, 2022 at 0:15
1 Answer
Reset to default 12This is very easy to do with the multer module for Express. We'll also add a test .html file to the directory (client side JavaScript).
To test this out, run node server.js, then navigate to http://localhost:8081 in your browser.
server.js
const express = require('express');
const multer = require('multer');
const upload = multer();
const fs = require('fs');
var app = express();
app.use(express.static(__dirname));
app.post('/post_pdf/', upload.any(), (req, res) => {
console.log('POST /post_pdf/');
console.log('Files: ', req.files);
fs.writeFile(req.files[0].originalname, req.files[0].buffer, (err) => {
if (err) {
console.log('Error: ', err);
res.status(500).send('An error occurred: ' + err.message);
} else {
res.status(200).send('ok');
}
});
});
app.listen(process.env.PORT || 8081);
index.html
<html>
<head>
<script src="https://code.jquery./jquery-3.3.1.js"></script>
<script>
var fileData = null;
function loadFile() {
var preview = document.querySelector('file');
var file = document.querySelector('input[type=file]').files[0];
var reader = new FileReader();
reader.onloadend = function () {
fileData = file;
}
if (file) {
reader.readAsDataURL(file);
}
}
function uploadFile() {
data = new FormData();
data.append('file', fileData);
$.ajax({
url: "/post_pdf/",
type: "POST",
data: data,
enctype: 'multipart/form-data',
processData: false,
contentType: false,
success: function(data) {
document.getElementById("result").innerHTML = 'Result: Upload successful';
},
error: function(e) {
document.getElementById("result").innerHTML = 'Result: Error occurred: ' + e.message;
}
});
}
</script>
</head>
<body>
<input type="file" onchange="loadFile()"><br>
<button onclick="uploadFile()">Upload..</button>
<div id='result'></div>
</body>
</html>