From eaab4698ebdb80e71abeee329762011076fd0054 Mon Sep 17 00:00:00 2001
From: bicarus <202771338+bicarus-dev@users.noreply.github.com>
Date: Sat, 5 Sep 2026 05:32:50 -0700
Subject: [PATCH] api: log JSON parse error (#904)

---
 src/spice2x/api/controller.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/spice2x/api/controller.cpp b/src/spice2x/api/controller.cpp
index 1a6c4ddd..c437ba8c 100644
--- a/src/spice2x/api/controller.cpp
+++ b/src/spice2x/api/controller.cpp
@@ -8,6 +8,7 @@
 #include "client.h"
 #include "cfg/configurator.h"
 #include "external/rapidjson/document.h"
+#include "external/rapidjson/error/en.h"
 #include "util/crypt.h"
 #include "util/logging.h"
 #include "util/utils.h"
@@ -312,6 +313,8 @@ bool Controller::process_request(ClientState *state, const char *in, size_t in_s
 
     // check for parse error
     if (document.HasParseError()) {
+        log_warning("api", "Request JSON parse error: {} (byte offset {}, decrypted request length {} bytes)",
+            GetParseError_En(document.GetParseError()), document.GetErrorOffset(), in_size);
 
         // return empty response and close connection
         out->push_back(0);