From c500a3d9d88ec1bf4b80b8e6843acdcb3779119c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tiago=20Rodrigo=20Cal=C3=B3gero?= <tiaguinhor@gmail.com>
Date: Tue, 6 Sep 2022 03:07:27 -0300
Subject: [PATCH 1/2] Added default user-agent (#16)

Shopify doesn't accept a CURL without `CURLOPT_USERAGENT` option, it returns `403 Forbidden` instead.
---
 src/Feed.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Feed.php b/src/Feed.php
index 8fcba58..3a59c27 100644
--- a/src/Feed.php
+++ b/src/Feed.php
@@ -218,6 +218,7 @@ private static function httpRequest($url, $user, $pass)
 			curl_setopt($curl, CURLOPT_TIMEOUT, 20);
 			curl_setopt($curl, CURLOPT_ENCODING, '');
 			curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); // no echo, just return result
+			curl_setopt($curl, CURLOPT_USERAGENT, '');
 			if (!ini_get('open_basedir')) {
 				curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); // sometime is useful :)
 			}

From ab13f8f82091d5c54206a3223e68178340a9bfc5 Mon Sep 17 00:00:00 2001
From: Zorn <tim@zornco.com>
Date: Fri, 8 Sep 2023 16:41:09 -0600
Subject: [PATCH 2/2] feat: handle broken XML documents

---
 src/Feed.php | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/Feed.php b/src/Feed.php
index 3a59c27..6a46488 100644
--- a/src/Feed.php
+++ b/src/Feed.php
@@ -193,7 +193,14 @@ private static function loadXml($url, $user, $pass)
 			throw new FeedException('Cannot load feed.');
 		}
 
-		return new SimpleXMLElement($data, LIBXML_NOWARNING | LIBXML_NOERROR | LIBXML_NOCDATA);
+		$doc = new DOMDocument();
+		$doc->loadXML($data, LIBXML_NOWARNING | LIBXML_NOERROR | LIBXML_NOCDATA);
+
+		if ($doc->documentElement !== NULL) {
+			return new SimpleXMLElement($doc->saveXML(), LIBXML_NOWARNING | LIBXML_NOERROR | LIBXML_NOCDATA);
+		} else {
+			return new SimpleXMLElement('<?xml version="1.0" encoding="UTF-8" ?><rss version="2.0"><channel><title></title><link></link><description></description></channel></rss>', LIBXML_NOWARNING | LIBXML_NOERROR);
+		}
 	}