1 files changed, 56 insertions, 0 deletions
diff --git a/src/zenhttp/httpclient.cpp b/src/zenhttp/httpclient.cpp
index 9d5846f71..b6a07250e 100644
--- a/src/zenhttp/httpclient.cpp
+++ b/src/zenhttp/httpclient.cpp
@@ -320,6 +320,62 @@ HttpClient::Response::IsSuccess() const noexcept
 	return !Error && IsHttpSuccessCode(StatusCode);
 }
 
+std::string_view
+HttpClient::Response::FindHeader(std::string_view Name) const
+{
+	// Scan the raw arena first - the async client populates this and leaves
+	// Header empty by default. Lines are "Key: Value\r\n" (the trailing \r\n
+	// is what curl hands the HEADER callback; we keep it verbatim).
+	if (!HeaderArena.empty())
+	{
+		std::string_view View(HeaderArena);
+		while (!View.empty())
+		{
+			const size_t	 LineEnd = View.find('\n');
+			std::string_view Line	 = LineEnd == std::string_view::npos ? View : View.substr(0, LineEnd);
+			View					 = LineEnd == std::string_view::npos ? std::string_view{} : View.substr(LineEnd + 1);
+
+			while (!Line.empty() && (Line.back() == '\r' || Line.back() == '\n'))
+			{
+				Line.remove_suffix(1);
+			}
+			if (Line.empty())
+			{
+				continue;
+			}
+			const size_t Colon = Line.find(':');
+			if (Colon == std::string_view::npos)
+			{
+				continue;  // HTTP status line or malformed
+			}
+			std::string_view K = Line.substr(0, Colon);
+			std::string_view V = Line.substr(Colon + 1);
+			while (!K.empty() && K.back() == ' ')
+			{
+				K.remove_suffix(1);
+			}
+			while (!V.empty() && V.front() == ' ')
+			{
+				V.remove_prefix(1);
+			}
+			if (StrCaseEquals(K, Name))
+			{
+				return V;
+			}
+		}
+	}
+
+	// Fall back to the parsed map (sync client populates this).
+	for (const auto& [K, V] : *Header)
+	{
+		if (StrCaseEquals(K, Name))
+		{
+			return V;
+		}
+	}
+	return {};
+}
+
 std::string
 HttpClient::Response::ErrorMessage(std::string_view Prefix) const
 {