socket hang up

[taoqf]

When I use this module for post a file stream, it fails:

const data = fs.readFileSync(file_path);
const s = contentstream(data)

// const s = fs.createReadStream(file_path); // this line works well

const formData = {
	file: s
};
request.post({
	url,
	formData
}).on('data', (data) => {
	console.log('data===', data.toString('utf8'));
}).on('error', (err) => {
	console.error(err);
});

[taoqf]

Here is the message I got:

Error: socket hang up