astro/dist/assets/utils/remotePattern.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

import { isRemotePath } from "@astrojs/internal-helpers/path";
function matchPattern(url, remotePattern) {
  return matchProtocol(url, remotePattern.protocol) && matchHostname(url, remotePattern.hostname, true) && matchPort(url, remotePattern.port) && matchPathname(url, remotePattern.pathname, true);
}
function matchPort(url, port) {
  return !port || port === url.port;
}
function matchProtocol(url, protocol) {
  return !protocol || protocol === url.protocol.slice(0, -1);
}
function matchHostname(url, hostname, allowWildcard) {
  if (!hostname) {
    return true;
  } else if (!allowWildcard || !hostname.startsWith("*")) {
    return hostname === url.hostname;
  } else if (hostname.startsWith("**.")) {
    const slicedHostname = hostname.slice(2);
    return slicedHostname !== url.hostname && url.hostname.endsWith(slicedHostname);
  } else if (hostname.startsWith("*.")) {
    const slicedHostname = hostname.slice(1);
    const additionalSubdomains = url.hostname.replace(slicedHostname, "").split(".").filter(Boolean);
    return additionalSubdomains.length === 1;
  }
  return false;
}
function matchPathname(url, pathname, allowWildcard) {
  if (!pathname) {
    return true;
  } else if (!allowWildcard || !pathname.endsWith("*")) {
    return pathname === url.pathname;
  } else if (pathname.endsWith("/**")) {
    const slicedPathname = pathname.slice(0, -2);
    return slicedPathname !== url.pathname && url.pathname.startsWith(slicedPathname);
  } else if (pathname.endsWith("/*")) {
    const slicedPathname = pathname.slice(0, -1);
    const additionalPathChunks = url.pathname.replace(slicedPathname, "").split("/").filter(Boolean);
    return additionalPathChunks.length === 1;
  }
  return false;
}
function isRemoteAllowed(src, {
  domains = [],
  remotePatterns = []
}) {
  if (!isRemotePath(src)) return false;
  const url = new URL(src);
  return domains.some((domain) => matchHostname(url, domain)) || remotePatterns.some((remotePattern) => matchPattern(url, remotePattern));
}
export {
  isRemoteAllowed,
  matchHostname,
  matchPathname,
  matchPattern,
  matchPort,
  matchProtocol
};