@redocly/openapi-core/lib/utils/read-file-from-url.js

See https://github.com/Redocly/redocly-cli

import * as picomatch from 'picomatch';
import { env } from '../env.js';
export async function readFileFromUrl(url, config) {
    const headers = {};
    for (const header of config.headers) {
        if (match(url, header.matches)) {
            headers[header.name] =
                header.envVariable !== undefined ? env[header.envVariable] || '' : header.value;
        }
    }
    const req = await (config.customFetch || fetch)(url, {
        headers: headers,
    });
    if (!req.ok) {
        throw new Error(`Failed to load ${url}: ${req.status} ${req.statusText}`);
    }
    return { body: await req.text(), mimeType: req.headers.get('content-type') };
}
function match(url, pattern) {
    if (!pattern.match(/^https?:\/\//)) {
        // if pattern doesn't specify protocol directly, do not match against it
        url = url.replace(/^https?:\/\//, '');
    }
    return picomatch.isMatch(url, pattern);
}
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