-fix memory leak

src/include/taler_mhd_lib.h

@@ -124,6 +124,21 @@ TALER_MHD_reply_json (struct MHD_Connection *connection,
                       unsigned int response_code);
 
 
+/**
+ * Send JSON object as response, and free the @a json
+ * object.
+ *
+ * @param connection the MHD connection
+ * @param json the json object (freed!)
+ * @param response_code the http response code
+ * @return MHD result code
+ */
+MHD_RESULT
+TALER_MHD_reply_json_steal (struct MHD_Connection *connection,
+                            json_t *json,
+                            unsigned int response_code);
+
+
 /**
  * Function to call to handle the request by building a JSON
  * reply from a format string and varargs.
@@ -151,7 +166,7 @@ TALER_MHD_reply_json_pack (struct MHD_Connection *connection,
  * @return MHD result code
  */
 #define TALER_MHD_REPLY_JSON_PACK(connection,response_code,...) \
-  TALER_MHD_reply_json (connection, GNUNET_JSON_PACK (__VA_ARGS__), \
+  TALER_MHD_reply_json_steal (connection, GNUNET_JSON_PACK (__VA_ARGS__), \
                               response_code)
 
 

src/mhd/mhd_responses.c

@@ -219,6 +219,21 @@ TALER_MHD_reply_json (struct MHD_Connection *connection,
 }
 
 
+MHD_RESULT
+TALER_MHD_reply_json_steal (struct MHD_Connection *connection,
+                            json_t *json,
+                            unsigned int response_code)
+{
+  MHD_RESULT ret;
+
+  ret = TALER_MHD_reply_json (connection,
+                              json,
+                              response_code);
+  json_decref (json);
+  return ret;
+}
+
+
 MHD_RESULT
 TALER_MHD_reply_cors_preflight (struct MHD_Connection *connection)
 {