@helia/verified-fetch/dist/src/utils/ipfs-path-to-url.js

A fetch-like API for obtaining verified & trustless IPFS content on the web

import { InvalidParametersError } from '@libp2p/interface';
/**
 * Turns an IPFS or IPNS path into a HTTP URL. Path gateway syntax is used to
 * preserve any case sensitivity
 *
 * - `/ipfs/cid` -> `https://example.org/ipfs/cid`
 * - `/ipns/name` -> `https://example.org/ipns/name`
 */
export function ipfsPathToUrl(path) {
    if (!path.startsWith('/ipfs/') && !path.startsWith('/ipns/')) {
        throw new InvalidParametersError(`Path ${path} did not start with /ipfs/ or /ipns/`);
    }
    // trim fragment
    const fragmentIndex = path.indexOf('#');
    let fragment = '';
    if (fragmentIndex > -1) {
        fragment = path.substring(fragmentIndex);
        path = path.substring(0, fragmentIndex);
    }
    // trim query
    const queryIndex = path.indexOf('?');
    let query = '';
    if (queryIndex > -1) {
        query = path.substring(queryIndex);
        path = path.substring(0, queryIndex);
    }
    const type = path.substring(1, 5);
    const rest = path.substring(6);
    return `https://example.org/${type}/${rest}${query}${fragment}`;
}
/**
 * Turns an IPFS or IPNS URL into a HTTP URL. Path gateway syntax is used to
 * preserve and case sensitivity
 *
 * `ipfs://cid` -> `https://example.org/ipfs/cid`
 */
export function ipfsUrlToUrl(url) {
    if (!url.startsWith('ipfs://') && !url.startsWith('ipns://')) {
        throw new InvalidParametersError(`URL ${url} did not start with ipfs:// or ipns://`);
    }
    const type = url.substring(0, 4);
    const rest = url.substring(7);
    return `https://example.org/${type}/${rest}`;
}
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