Function parseLinkHeaderURL

src/registry/http.ts:87–130

(link: string, baseURL: string)

}

function parseLinkHeaderURL(link: string, baseURL: string): URL | null {
  for (const linkValue of splitLinkHeaderValues(link)) {
    const targetStart = linkValue.indexOf("<");
    const targetEnd = linkValue.indexOf(">", targetStart + 1);
    if (targetStart === -1 || targetEnd === -1) {
      continue;
    }

    const params = linkValue
      .slice(targetEnd + 1)
      .split(";")
      .map((param) => param.trim())
      .filter((param) => param.length > 0);
    const isNext = params.some((param) => {
      const [name, ...valueParts] = param.split("=");
      if (name.toLowerCase() !== "rel" || valueParts.length === 0) {
        return false;
      }

      const value = valueParts.join("=").trim().replace(/^"|"$/g, "");
      return value.split(/\s+/).includes("next");
    });
    if (!isNext) {
      continue;
    }

    const href = linkValue.slice(targetStart + 1, targetEnd).trim();
    try {
      return new URL(href);
    } catch {
      if (baseURL.length === 0) {
        return null;
      }

      try {
        return new URL(href, baseURL);
      } catch {
        return null;
      }
    }
  }

  return null;
}

function isOpaqueReferrersCursor(cursor: string): boolean {
  return cursor.startsWith("/v2/");