How to use Node to read PUT file? - node.js

Question

I'm trying to replicate the functionality of bashupload.com but using node. I want the simplicity of just doing curl host -T file but I ran into some problems because I can't seem to understand how to read the PUT file. Curl uses a PUT request when you use the -T option, so it has to be PUT.
I tried using packages like multiparty:
receiveAndUploadFile: function (req, res) {
var multiparty = require('multiparty');
var form = new multiparty.Form();
// var fs = require('fs');
form.parse(req, function(err, fields, files) {
console.log('The files', files)
console.log('The fields', fields)
})
res.send("Okay, bye.")
}
But this prints undefined values for files and fields.
I also tried using express-fileupload middleware
app.use(fileUpload({}));
but still, if I try to print req.files then I will get undefined.
Is there any specific way to read the file?
Thanks a lot!
This is my main file, index.js::
const express = require("express");
const path = require("path");
const app = express();
const port = 8080;
const tools = require("./tools");
const fileUpload = require("express-fileupload");
app.use(fileUpload());
app.use(express.static(__dirname + "/assets"));
app.get("/", (req, res) => {
res.sendFile(path.join(__dirname + "/index.html"));
});
app.get("/f", (req, res) => {
res.send("This route is only available as a POST route.");
});
app.put("/f", tools.receiveAndUploadFile);
app.listen(port, () => {
console.log(`Server started listening on port: ${port}`);
});
And the tools.js file:
const fs = require("fs");
const path = require("path");
module.exports = {
receiveAndUploadFile: function (req, res) {
console.log("Files: ", req.files);
res.send("Okay bye");
},
};
This is printing "Files: undefined" to the console.

Answer 1

A PUT and a POST are effectively the same thing. To upload arbitrary data, just read the data stream and write it to a file. Node provides a .pipe method on streams to easily pipe data from one stream into another, for example a file stream here:
const fs = require('fs')
const express = require('express')
const app = express()
const PORT = 8080
app.get('/*', (req, res) => res.status(401).send(req.url + ': This route is only available as a POST route'))
app.put('/*', function (req, res, next) {
console.log('Now uploading', req.url, ': ', req.get('content-length'), 'bytes')
req.pipe(fs.createWriteStream(__dirname + req.url))
req.on('end', function () { // Done reading!
res.sendStatus(200)
console.log('Uploaded!')
next()
})
})
app.listen(8080, () => console.log('Started on :8080'))
If you do a PUT to /file.mp4, it will upload all the data over to the script dir (__dirname) + the URL file path.
via curl, curl http://localhost:8080/ -T hello.txt