diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 4b70927332010857fc45ea71e7142899d849b577..761593f6768d4f5017e9fd48b13ec7eb58a948ec 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -3560,18 +3560,22 @@ static int postProceSql(char *host, uint16_t port,
             break;
         received += bytes;
 
-        verbosePrint("%s() LN%d: received:%d resp_len:%d, response_buf:\n%s\n",
-                __func__, __LINE__, received, resp_len, response_buf);
-
-        if (((NULL != strstr(response_buf, resEncodingChunk))
-                    && (NULL != strstr(response_buf, resHttp)))
-                || ((NULL != strstr(response_buf, resHttpOk))
-                    && (NULL != strstr(response_buf, "\"status\":")))) {
-            debugPrint(
-                    "%s() LN%d: received:%d resp_len:%d, response_buf:\n%s\n",
+        response_buf[RESP_BUF_LEN - 1] = '\0';
+
+        if (strlen(response_buf)) {
+            verbosePrint("%s() LN%d: received:%d resp_len:%d, response_buf:\n%s\n",
                     __func__, __LINE__, received, resp_len, response_buf);
-            break;
-        } 
+
+            if (((NULL != strstr(response_buf, resEncodingChunk))
+                        && (NULL != strstr(response_buf, resHttp)))
+                    || ((NULL != strstr(response_buf, resHttpOk))
+                        && (NULL != strstr(response_buf, "\"status\":")))) {
+                debugPrint(
+                        "%s() LN%d: received:%d resp_len:%d, response_buf:\n%s\n",
+                        __func__, __LINE__, received, resp_len, response_buf);
+                break;
+            } 
+        }
     } while(received < resp_len);
 
     if (received == resp_len) {
@@ -3579,8 +3583,6 @@ static int postProceSql(char *host, uint16_t port,
         ERROR_EXIT("storing complete response from socket");
     }
 
-    response_buf[RESP_BUF_LEN - 1] = '\0';
-
     if (strlen(pThreadInfo->filePath) > 0) {
         appendResultBufToFile(response_buf, pThreadInfo);
     }