From d1573c6218c073ef930f183372dcd4a6c1a42420 Mon Sep 17 00:00:00 2001
From: King_DuckZ <king_duckz@gmx.com>
Date: Fri, 4 Sep 2020 02:29:26 +0100
Subject: [PATCH] Header entries should be case insensitive

---
 src/oro/api_nap.cpp | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/src/oro/api_nap.cpp b/src/oro/api_nap.cpp
index 62d5564..72b14f4 100644
--- a/src/oro/api_nap.cpp
+++ b/src/oro/api_nap.cpp
@@ -21,6 +21,8 @@
 #include "duckhandy/int_conv.hpp"
 #include "api_nap_exception.hpp"
 #include <optional>
+#include <algorithm>
+#include <cctype>
 
 namespace sjd = simdjson::dom;
 namespace sj = simdjson;
@@ -28,22 +30,30 @@ namespace sj = simdjson;
 namespace oro {
 
 namespace {
+bool equal (std::string_view a, std::string_view b) {
+	return a.size() == b.size() and std::equal(
+		a.begin(), a.end(),
+		b.begin(),
+		[](auto c1, auto c2) {return std::tolower(c1) == std::tolower(c2); }
+	);
+}
+
 Header to_header (const nap::HttpResponse& resp) {
 	using dhandy::int_conv;
 
 	Header ret;
 	for (const auto& entry : resp.header) {
-		if (entry.first == "Date")
+		if (equal(entry.first, "Date"))
 			ret.date = from_header_timestamp(std::string(entry.second));
-		else if (entry.first == "X-RateLimit-Limit")
+		else if (equal(entry.first, "X-RateLimit-Limit"))
 			ret.rate_limit = int_conv<decltype(ret.rate_limit)>(entry.second);
-		else if (entry.first == "X-RateLimit-Remaining")
+		else if (equal(entry.first, "X-RateLimit-Remaining"))
 			ret.rate_limit_remaining = int_conv<decltype(ret.rate_limit_remaining)>(entry.second);
-		else if (entry.first == "X-RateLimit-Reset")
+		else if (equal(entry.first, "X-RateLimit-Reset"))
 			ret.rate_limit_reset = int_conv<decltype(ret.rate_limit_reset)>(entry.second);
-		else if (entry.first == "Retry-After")
+		else if (equal(entry.first, "Retry-After"))
 			ret.retry_after = int_conv<decltype(ret.retry_after)>(entry.second);
-		else if (entry.first == "Server")
+		else if (equal(entry.first, "Server"))
 			ret.server = std::string(entry.second);
 	}
 	return ret;