From b2e329e6b29d8fc67d8e0b8a4c205cba9fd0bbed Mon Sep 17 00:00:00 2001
From: Jiwoo Park <jiwoo_90@naver.com>
Date: Fri, 18 Oct 2024 20:08:20 +0900
Subject: [PATCH] Allow empty header values

---
 httplib.h    | 2 +-
 test/test.cc | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/httplib.h b/httplib.h
index 72bd2b6307..56af8f673c 100644
--- a/httplib.h
+++ b/httplib.h
@@ -4115,7 +4115,7 @@ inline bool parse_header(const char *beg, const char *end, T fn) {
     p++;
   }
 
-  if (p < end) {
+  if (p <= end) {
     auto key_len = key_end - beg;
     if (!key_len) { return false; }
 
diff --git a/test/test.cc b/test/test.cc
index 0cd450e763..612304b371 100644
--- a/test/test.cc
+++ b/test/test.cc
@@ -4922,6 +4922,15 @@ TEST(ServerRequestParsingTest, InvalidFieldValueContains_CR_LF_NUL) {
   EXPECT_EQ("HTTP/1.1 400 Bad Request", out.substr(0, 24));
 }
 
+TEST(ServerRequestParsingTest, EmptyFieldValue) {
+  std::string out;
+
+  test_raw_request("GET /header_field_value_check HTTP/1.1\r\n"
+                   "Test: \r\n\r\n",
+                   &out);
+  EXPECT_EQ("HTTP/1.1 200 OK", out.substr(0, 15));
+}
+
 TEST(ServerStopTest, StopServerWithChunkedTransmission) {
   Server svr;