Node.js 在nodejs中使用xmlbuilder包中的内置streamWriter

我想创建XML文件，为此我使用xmlbuilder包。 初始代码工作正常，如下所示：

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);

writableStream.end();

但是我在包的wiki中看到，streamwriter中有一个内置的。 我想将其添加到项目中，并删除我在代码中所做的一些自定义操作

我尝试了以下方法：

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);

---

不幸的是，这不起作用，我做错了什么或忘记了什么？

缺少的代码行如下：

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);

writableStream.end();

最终结果如下所示：

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
    });