From 4536d45a9e18def8d88a41b95b4fa17bc5e574d6 Mon Sep 17 00:00:00 2001
From: hkr04 <hyde_2002@foxmail.com>
Date: Thu, 20 Mar 2025 01:10:34 +0800
Subject: [PATCH] sse_client: fix bug with json

---
 src/mcp_sse_client.cpp | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/mcp_sse_client.cpp b/src/mcp_sse_client.cpp
index 95efa4e..669a33e 100644
--- a/src/mcp_sse_client.cpp
+++ b/src/mcp_sse_client.cpp
@@ -542,11 +542,14 @@ json sse_client::send_jsonrpc(const request& req) {
         if (status == std::future_status::ready) {
             json response = response_future.get();
             
-            if (response.contains("isError") && response["isError"].get<bool>()) {
-                int code = response["error"]["code"];
-                std::string message = response["error"]["message"];
-                
-                throw mcp_exception(static_cast<error_code>(code), message);
+            if (response.contains("isError") && response["isError"].is_boolean() && response["isError"].get<bool>()) {
+                if (response.contains("error") && response["error"].is_object()) {
+                    const auto& err_obj = response["error"];
+                    int code = err_obj.contains("code") ? err_obj["code"].get<int>() : static_cast<int>(error_code::internal_error);
+                    std::string message = err_obj.value("message", "");
+                    // Handle error
+                    throw mcp_exception(static_cast<error_code>(code), message);
+                }
             }
             
             return response;