URLs are called with and without fragment identifier

[jeswr]

Issue type:

• 🐌 Performance issue

---

Description:

Running

import { QueryEngine } from '@comunica/query-sparql-link-traversal';

const fetchFn = globalThis.fetch;

// @ts-ignore
globalThis.fetch = (...args) => {
    console.log(args[0]);
    if (args[0] === 'https://w3id.org/dpv') { 
        process.exit();
    }
    return fetchFn(...args);
}

async function run() {
    const engine = new QueryEngine();
    const res = await engine.queryQuads('CONSTRUCT WHERE { ?s ?p ?o . }', { sources: ['https://w3id.org/dpv#Purpose'], lenient: true });

    res.on('data', (quad) => {
    });
}

run();

Results in

$ npx ts-node lib/traverse.ts 
https://w3id.org/dpv#Purpose
https://w3id.org/dpv

Meaning that fetch is called twice on the https://w3id.org/dpv URL during traversal. I would expect the fragment part of the URL to have been stripped on the first call to the fetch function, and for the second call to not have been made.