inspector: log response and requests in the inspector for debugging

Logs the raw messages from the inspector when NODE_DEBUG_NATIVE
is set to inspector_server to facilitate debugging.

PR-URL: #46941
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>

Author: joyeecheung

src/inspector_agent.cc

@@ -245,6 +245,9 @@ class ChannelImpl final : public v8_inspector::V8Inspector::Channel,
 
   void dispatchProtocolMessage(const StringView& message) {
     std::string raw_message = protocol::StringUtil::StringViewToUtf8(message);
+    per_process::Debug(DebugCategory::INSPECTOR_SERVER,
+                       "[inspector received] %s\n",
+                       raw_message);
     std::unique_ptr<protocol::DictionaryValue> value =
         protocol::DictionaryValue::cast(protocol::StringUtil::parseMessage(
             raw_message, false));
@@ -293,6 +296,13 @@ class ChannelImpl final : public v8_inspector::V8Inspector::Channel,
   void flushProtocolNotifications() override { }
 
   void sendMessageToFrontend(const StringView& message) {
+    if (per_process::enabled_debug_list.enabled(
+            DebugCategory::INSPECTOR_SERVER)) {
+      std::string raw_message = protocol::StringUtil::StringViewToUtf8(message);
+      per_process::Debug(DebugCategory::INSPECTOR_SERVER,
+                         "[inspector send] %s\n",
+                         raw_message);
+    }
     delegate_->SendMessageToFrontend(message);
   }