Get PDF Custom Metadata in Node.js / Typescript

I am trying to get Custom Metadata from a PDF file in node (angular-universal).

The custom metadata is visible when logging the file as string, so i thought this would be an easy task.

Packages i've tried


I tried the following packages and many more, but they all resulted in some errors or did not include custom metadata

pdfjs-dist

• works in client but stops working when running Server-side-rendering (angular-universal) because of DOM-dependencies
• problems with browser dependencies like canvas and more
• installing dependencies like canvas causes errors canvas.node needs appropriate loader. to this i only found solutions adjusting webpack config, but i dont have a custom-webpack builder with angular-universal (Server-side-rendering)

pdf-parse

• has not been updated for 3 years and always goes into debug mode because it has an outdated let isDebugMode = !module.parent; in index.js (ISSUE)
• when using a patch branch ("pdf-parse": "gitlab:aduh95/pdf-parse#patch-1",) there are other errors xx is not a function.

pdf-lib

• Works but does not support Custom metadata

Example file

copied code snipet to test from This Stackoverflow Answer

• works for prepared metadata, but i got stuck trying to get the Custom metadata

document.getElementById('f').oninput = async function() {
var pdf = this.files[0];
var details = await pdfDetails(pdf);
console.log(details);
};

function pdfDetails(pdfBlob) {
return new Promise(done => {
var reader = new FileReader();
reader.onload = function() {
var raw = reader.result;
var Pages = raw.match(/\/Type[\s]*\/Page[^s]/g).length;
var regex = /<xmp.*?.*?)>(.*?)</g;
var meta = [{
Pages
}];
var matches = regex.exec(raw);
while (matches != null) {
matches.shift();
meta.push({
[matches.shift()]: matches.shift()
});
matches = regex.exec(raw);
}
done(meta);
};
reader.readAsBinaryString(pdfBlob);
});
}

<input type=file id=f accept=".pdf">

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