--- func_curl.c 2019-10-16 15:50:40.000000000 +0000
+++ /usr/src/asterisk-16.6.1/funcs/func_curl.c  2020-09-02 17:48:17.049898395 +0000
@@ -711,6 +711,14 @@
         * CURLOPT_ERRORBUFFER" (62bcf005f4678a93158358265ba905bace33b834). */
        curl_easy_setopt(*curl, CURLOPT_ERRORBUFFER, (char*)NULL);
 
+       long http_code = 0;
+       ret=0;
+       curl_easy_getinfo (*curl, CURLINFO_RESPONSE_CODE, &http_code);
+       ast_log(LOG_WARNING, "Curl CURLINFO_RESPONSE_CODE (%ld).\n",http_code);
+       if (http_code == 404){
+               ret=-1;
+       }
+
        if (store) {
                AST_LIST_UNLOCK(list);
        }
@@ -720,6 +728,7 @@
        }
 
        if (args->cb_data.str && ast_str_strlen(args->cb_data.str)) {
+
                ast_str_trim_blanks(args->cb_data.str);
 
                ast_debug(3, "CURL returned str='%s'\n", ast_str_buffer(args->cb_data.str));
@@ -745,7 +754,6 @@
                        ast_free(fields);
                        ast_free(values);
                }
-               ret = 0;
        }
 
        if (chan) {
@@ -940,3 +948,4 @@
        .load_pri = AST_MODPRI_REALTIME_DEPEND2,
        .requires = "res_curl",
 );
+