--- func_curl.c 2019-10-16 15:50:40.000000000 +0000
+++ /usr/src/asterisk-16.6.1/funcs/func_curl.c  2020-09-02 15:01:43.429232772 +0000
@@ -720,8 +720,22 @@
        }
 
        if (args->cb_data.str && ast_str_strlen(args->cb_data.str)) {
+
                ast_str_trim_blanks(args->cb_data.str);
 
+               char word[80];
+               strcpy(word,"404 Not Found");
+               if(strstr(args->cb_data.str, word) != NULL) 
+               {
+                       ret=0;
+               }
+               else
+               {
+                       ast_log(LOG_WARNING, "Curl Request Not Found(404).\n");
+                       ret=-1;
+               }
+
+
                ast_debug(3, "CURL returned str='%s'\n", ast_str_buffer(args->cb_data.str));
                if (hashcompat) {
                        char *remainder = ast_str_buffer(args->cb_data.str);
@@ -745,7 +759,6 @@
                        ast_free(fields);
                        ast_free(values);
                }
-               ret = 0;
        }
 
        if (chan) {