From 07805e249d17a59c7c056cfb886b9b3e39870d71 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Thu, 6 Apr 2023 19:48:37 +0100
Subject: If Accept header specifies no preference first, shortcut to default
 serializer

---
 icespider/core/ihttpRequest.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/icespider/core/ihttpRequest.cpp b/icespider/core/ihttpRequest.cpp
index 97cdcd7..c575c82 100644
--- a/icespider/core/ihttpRequest.cpp
+++ b/icespider/core/ihttpRequest.cpp
@@ -114,6 +114,12 @@ namespace IceSpider {
 		if (acceptHdr) {
 			auto accepts = parseAccept(*acceptHdr);
 			auto & strm = getOutputStream();
+			if (accepts.empty()) {
+				throw Http400_BadRequest();
+			}
+			if (!accepts.front().group && !accepts.front().type) {
+				return handler->defaultSerializer(strm);
+			}
 			for (auto & a : accepts) {
 				ContentTypeSerializer serializer = handler->getSerializer(a, strm);
 				if (serializer.second) {
-- 
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