How to modify and XML on the fly? - node.js

Question

I am reading a XML file and send it to a REST API. However before sending it I would like to modify some values.
This is how I send the data:
data = await readFile(path.resolve(__dirname, file), 'utf8');
const config = {
headers: {
'Content-Type': 'text/plain',
'Content-Length': data.length,
},
};
result = await axios.post(
'https://someRestapi.com/',
data, config,
);
And I want to change the name Simon to Zimon in the author name for example.
<?xml version="1.0" encoding="UTF-8"?>
<Document schemaVersion="12"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Author>
<Name>
<First>Simon</First>
<Second>SomeName</Second>
</Name>
</Author>
</Document>
Is there an easy solution to do this?

Answer 1

Had to do something similar recently and ended up using fast-xml-parser. Applied to your case, you could do:
const xmlString = `<?xml version="1.0" encoding="UTF-8"?>
<Document schemaVersion="12"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Author>
<Name>
<First>Simon</First>
<Second>SomeName</Second>
</Name>
</Author>
</Document>`;
const xmlToJsonParser = require('fast-xml-parser');
const J2xParser = require("fast-xml-parser").j2xParser;
const tObj = xmlToJsonParser.getTraversalObj(xmlString,{ignoreAttributes :false});
const jsonObj = xmlToJsonParser.convertToJson(tObj,{ignoreAttributes :false});
jsonObj.Document.Author.Name.First = "Zimon";
let result = new J2xParser({format:true, ignoreAttributes :false}).parse(jsonObj);
result = `<?xml version="1.0" encoding="UTF-8"?>\n${result}`;
console.log(result);
This will print:
<?xml version="1.0" encoding="UTF-8"?>
<Document schemaVersion="12" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Author>
<Name>
<First>Zimon</First>
<Second>SomeName</Second>
</Name>
</Author>
</Document>