Using the build-in streamWriter from the xmlbuilder package in nodejs - node.js

Question

I want to create XML files and for this I am using the package xmlbuilder.
The initial code works fine, which looks like following:
const xmlStructure = {
// xml structure
};
const root = builder.create(xmlStructure, { encoding: 'utf-8' });
const xml = root.end({ pretty: true });
const readableStream = new Readable();
const writableStream = file.createWriteStream();
writableStream
.on('error', error => {
throw error;
})
.on('finish', async () => {
// do something in the DB
});
readableStream._read = () => {
readableStream.push(xml);
readableStream.push(null);
};
readableStream.pipe(writableStream);
but I saw in the wiki of the package, that there is a build in streamwriter.
I would like to add this to the project and remove some of the custom things I did in the code.
I tried the following approach:
const xmlStructure = {
// xml structure
};
const writableStream = file.createWriteStream();
const writer = xmlbuilder.streamWriter(writableStream);
writableStream
.on('error', error => {
throw error;
})
.on('finish', async () => {
// do something in the DB
});
const root = builder.create(xmlStructure, { encoding: 'utf-8' });
const xml = root.end(writer);
const readableStream = new Readable();
readableStream.pipe(writableStream);
Unfortunatly this didn't work, what am I doing wrong or forgetting?

Answer 1

The missing line of code was the following:
writableStream.end();
So the end result looks like this:
const xmlStructure = {
// xml structure
};
const root = builder.create(xmlStructure, { encoding: 'utf-8' });
const writableStream = file.createWriteStream();
const writer = xmlbuilder.streamWriter(writableStream);
const xml = root.end(writer);
writableStream.end();
writableStream
.on('error', error => {
throw error;
})
.on('finish', async () => {
// do something in the DB
});