HTTP request logging (#6)

this change adds support for tracing http payloads when using the asio path. This was already supported when using the `--http=plugin` path and this change moves some code into a shared class for reuse.

1 files changed, 37 insertions, 0 deletions

diff --git a/src/zenhttp/servers/httptracer.cpp b/src/zenhttp/servers/httptracer.cpp
new file mode 100644
index 000000000..483307fb1
--- /dev/null
+++ b/src/zenhttp/servers/httptracer.cpp
@@ -0,0 +1,37 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#include "httptracer.h"
+
+#include <zencore/fmtutils.h>
+#include <zencore/logging.h>
+#include <zencore/session.h>
+
+namespace zen {
+
+void
+HttpServerTracer::Initialize(std::filesystem::path DataDir)
+{
+	m_DataDir	 = DataDir;
+	m_PayloadDir = DataDir / "debug" / GetSessionIdString();
+
+	ZEN_INFO("any debug payloads will be written to '{}'", m_PayloadDir);
+}
+
+void
+HttpServerTracer::WriteDebugPayload(std::string_view Filename, const std::span<const IoBuffer> Payload)
+{
+	uint64_t					 PayloadSize = 0;
+	std::vector<const IoBuffer*> Buffers;
+	for (auto& Io : Payload)
+	{
+		Buffers.push_back(&Io);
+		PayloadSize += Io.GetSize();
+	}
+
+	if (PayloadSize)
+	{
+		WriteFile(m_PayloadDir / Filename, Buffers.data(), Buffers.size());
+	}
+}
+
+}  // namespace zen