@loaders.gl/core/dist/lib/fetch/fetch-file.js

The core API for working with loaders.gl loaders and writers

// loaders.gl
// SPDX-License-Identifier: MIT
// Copyright (c) vis.gl contributors
import { resolvePath } from '@loaders.gl/loader-utils';
import { makeResponse } from "../utils/response-utils.js";
// import {FetchError} from './fetch-error';
export function isNodePath(url) {
    return !isRequestURL(url) && !isDataURL(url);
}
export function isRequestURL(url) {
    return url.startsWith('http:') || url.startsWith('https:');
}
export function isDataURL(url) {
    return url.startsWith('data:');
}
/**
 * fetch API compatible function
 * - Supports fetching from Node.js local file system paths
 * - Respects pathPrefix and file aliases
 */
export async function fetchFile(urlOrData, fetchOptions) {
    if (typeof urlOrData === 'string') {
        const url = resolvePath(urlOrData);
        // Support fetching from local file system
        if (isNodePath(url)) {
            if (globalThis.loaders?.fetchNode) {
                return globalThis.loaders?.fetchNode(url, fetchOptions);
            }
            // throw new Error(
            //   'fetchFile: globalThis.loaders.fetchNode not defined. Install @loaders.gl/polyfills'
            // );
        }
        // Call global fetch
        return await fetch(url, fetchOptions);
    }
    // TODO - should we still call fetch on non-URL inputs?
    return await makeResponse(urlOrData);
}