| import type { OutgoingHttpHeaders } from 'http' | |
| /** | |
| * Takes an object with a hostname property (like a parsed URL) and some | |
| * headers that may contain Host and returns the preferred hostname. | |
| * @param parsed An object containing a hostname property. | |
| * @param headers A dictionary with headers containing a `host`. | |
| */ | |
| export function getHostname( | |
| parsed: { hostname?: string | null }, | |
| headers?: OutgoingHttpHeaders | |
| ): string | undefined { | |
| // Get the hostname from the headers if it exists, otherwise use the parsed | |
| // hostname. | |
| let hostname: string | |
| if (headers?.host && !Array.isArray(headers.host)) { | |
| hostname = headers.host.toString().split(':', 1)[0] | |
| } else if (parsed.hostname) { | |
| hostname = parsed.hostname | |
| } else return | |
| return hostname.toLowerCase() | |
| } | |