From 5419192079f1e1e499f6f36de8b50bf0bf04b53d Mon Sep 17 00:00:00 2001
From: Bofh <bofh@nogafam.es>
Date: Tue, 22 Nov 2022 02:42:07 +0100
Subject: [PATCH] API to resolve instances hostname to URL

---
 api/v1/network/resolve-instance/index.php | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 api/v1/network/resolve-instance/index.php

diff --git a/api/v1/network/resolve-instance/index.php b/api/v1/network/resolve-instance/index.php
new file mode 100644
index 0000000..48bbdc0
--- /dev/null
+++ b/api/v1/network/resolve-instance/index.php
@@ -0,0 +1,22 @@
+<?php chdir('../../../../') ?>
+<?php require 'base.php' ?>
+<?php
+
+$hostname = trim($_GET['hostname']);
+
+$ch = curl_init();
+curl_setopt($ch, CURLOPT_URL, "https://$hostname/.well-known/host-meta");
+curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
+$output = curl_exec($ch);
+curl_close($ch);
+
+preg_match('/(?<=")[^"]+\/.well-known\/webfinger/', $output, $m);
+if (count($m) === 0) {
+	apiresult([
+		'error' => 'Could not find /.well-known/webfinger URL in instance given XML'
+	]);
+}
+apiresult([
+	'instance' => 'https://'.parse_url($m[0], PHP_URL_HOST),
+]);