From 50fb954e66e43e431a6dfed92d0f3638056f205e Mon Sep 17 00:00:00 2001
From: Maxence Lange <maxence@artificial-owl.com>
Date: Tue, 11 Jun 2019 19:40:16 -0100
Subject: request on host-meta

Signed-off-by: Maxence Lange <maxence@artificial-owl.com>
---
 lib/Exceptions/HostMetaException.php | 40 +++++++++++++++++++++++++++++++
 lib/Service/CurlService.php          | 46 ++++++++++++++++++++++++++++++++++--
 2 files changed, 84 insertions(+), 2 deletions(-)
 create mode 100644 lib/Exceptions/HostMetaException.php

diff --git a/lib/Exceptions/HostMetaException.php b/lib/Exceptions/HostMetaException.php
new file mode 100644
index 00000000..9c58ede4
--- /dev/null
+++ b/lib/Exceptions/HostMetaException.php
@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+
+
+/**
+ * Nextcloud - Social Support
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Maxence Lange <maxence@artificial-owl.com>
+ * @copyright 2018, Maxence Lange <maxence@artificial-owl.com>
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+namespace OCA\Social\Exceptions;
+
+
+use Exception;
+
+
+class HostMetaException extends Exception {
+
+}
+
diff --git a/lib/Service/CurlService.php b/lib/Service/CurlService.php
index cbea8819..ccf315cd 100644
--- a/lib/Service/CurlService.php
+++ b/lib/Service/CurlService.php
@@ -37,6 +37,7 @@ use daita\MySmallPhpTools\Traits\TArrayTools;
 use daita\MySmallPhpTools\Traits\TPathTools;
 use Exception;
 use OCA\Social\AP;
+use OCA\Social\Exceptions\HostMetaException;
 use OCA\Social\Exceptions\InvalidOriginException;
 use OCA\Social\Exceptions\InvalidResourceException;
 use OCA\Social\Exceptions\RedundancyLimitException;
@@ -121,7 +122,13 @@ class CurlService {
 			throw new InvalidResourceException();
 		}
 
-		$request = new Request('/.well-known/webfinger');
+		try {
+			$path = $this->hostMeta($host);
+		} catch (HostMetaException $e) {
+			$path = '/.well-known/webfinger';
+		}
+
+		$request = new Request($path);
 		$request->addData('resource', 'acct:' . $account);
 		$request->setAddress($host);
 
@@ -138,6 +145,32 @@ class CurlService {
 	}
 
 
+	/**
+	 * @param string $host
+	 *
+	 * @return string
+	 * @throws HostMetaException
+	 */
+	public function hostMeta(string &$host): string {
+		$request = new Request('/.well-known/host-meta');
+		$request->setAddress($host);
+
+		try {
+			$result = $this->request($request);
+		} catch (Exception $e) {
+			$this->miscService->log(
+				'hostMeta Exception - ' . get_class($e) . ' - ' . $e->getMessage(), 0
+			);
+			throw new HostMetaException($e->getMessage());
+		}
+
+		$url = $this->get('Link.@attributes.template', $result, '');
+		$host = parse_url($url, PHP_URL_HOST);
+
+		return parse_url($url, PHP_URL_PATH);
+	}
+
+
 	/**
 	 * @param string $account
 	 *
@@ -252,9 +285,16 @@ class CurlService {
 		}
 
 		$this->miscService->log(
-			'[>>] request: ' . json_encode($request) . ' - result: ' . $result, 1
+			'[>>] request: ' . json_encode($request) . ' - content-type: '
+			. $request->getContentType() . ' - result: ' . $result, 1
 		);
 
+		if (strpos($request->getContentType(), 'application/xrd') === 0) {
+			$xml = simplexml_load_string($result);
+			$result = json_encode($xml, JSON_UNESCAPED_SLASHES);
+			$this->miscService->log('XRD conversion to JSON: ' . $result, 1);
+		}
+
 		$result = json_decode((string)$result, true);
 		if (is_array($result)) {
 			return $result;
@@ -427,6 +467,8 @@ class CurlService {
 		$this->parseRequestResultCurl($curl, $request);
 
 		$code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
+		$contentType = curl_getinfo($curl, CURLINFO_CONTENT_TYPE);
+		$request->setContentType(($contentType === null) ? '' : $contentType);
 		$request->setResultCode($code);
 
 		$this->parseRequestResultCode301($code, $request);
-- 
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