JSON to XML conversion in Node JS service (using xml2js) - node.js

Question

I need some help/advice with JSON to XML conversion in Node js.
I have a service that gets a JSON object in request body that needs to convert to XML. I am able to achieve this using node-xml2js for json inputs with maximum one level of nested objects. But, it gets way more complicated with nested objects having attribute values. Attributes should be identified first, prefixed with $ sign and enclosed in curly braces before parsing through xml2js to get correct xml.
Is there a better way of doing this where this complicated layer of reformatting the json input can be simplified?
xml2js can converts this:
{
"Level1":{ "$":{ "attribute":"value" },
"Level2": {"$":{"attribute1":"05/29/2020",
"attribute2":"10","attribute3":"Pizza"}}
}
to this:(which is correct):
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Level1 attribute="value">
<Level2 attribute1="05/29/2020" attribute2="10" attribute3="Pizza"/>
</Level1>
But actual json input is this:
{
"Level1":{"attribute":"value",
"Level2": {"attribute1":"05/29/2020",
"attribute2":"10","attribute3":"Pizza"} }
}
Expected same result:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Level1 attribute="value">
<Level2 attribute1="05/29/2020" attribute2="10" attribute3="Pizza"/>
</Level1>
Please let me know if you have worked on similar requirements. Appreciate any help.
Thank you.

Answer 1

This would be a way to change the object back to the format expected in the library, although it assumes that all non object keys are supposed to be attributes (is that a valid assumption for your application?)
function groupChildren(obj) {
for(prop in obj) { // consider filtering for own properties (vs from prototype: for(prop of Object.keys(obj)) {
if (typeof obj[prop] === 'object') {
groupChildren(obj[prop]);
} else {
obj['$'] = obj['$'] || {};
obj['$'][prop] = obj[prop];
delete obj[prop];
}
}
return obj;
}
and then used like so:
var xml2js = require('xml2js');
var obj = {
Level1: {
attribute: 'value',
Level2: {
attribute1: '05/29/2020',
attribute2: '10',
attribute3: 'Pizza'
}
}
};
var builder = new xml2js.Builder();
var xml = builder.buildObject(groupChildren(obj));
which prints out:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Level1 attribute="value">
<Level2 attribute1="05/29/2020" attribute2="10" attribute3="Pizza"/>
</Level1>

Answer 2

you can use this library :nashwaan/xml-js
Like This:
let xmlJ=require('xml-js');
let parseToJson=(xml)=>{
return new Promise(resolve => {
let convert;
convert=xmlJ.xml2json(xml,{compact:true});
resolve(convert);
});
};