From 981d7c5e0231f4025ad5b3e73e9b65dd6ab39b00 Mon Sep 17 00:00:00 2001
From: slguan <slguan@taosdata.com>
Date: Tue, 14 Jan 2020 10:36:50 +0800
Subject: [PATCH] #1130 TBASE-1484

---
 src/modules/http/src/httpJson.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/modules/http/src/httpJson.c b/src/modules/http/src/httpJson.c
index 2bb768e801..ca88de59e6 100644
--- a/src/modules/http/src/httpJson.c
+++ b/src/modules/http/src/httpJson.c
@@ -310,7 +310,9 @@ void httpJsonInt(JsonBuf* buf, int num) {
 void httpJsonFloat(JsonBuf* buf, float num) {
   httpJsonItemToken(buf);
   httpJsonTestBuf(buf, MAX_NUM_STR_SZ);
-  if (num > 1E10 || num < -1E10) {
+  if (isinf(num) || isnan(num)) {
+    buf->lst += snprintf(buf->lst, MAX_NUM_STR_SZ, "null");
+  } else if (num > 1E10 || num < -1E10) {
     buf->lst += snprintf(buf->lst, MAX_NUM_STR_SZ, "%.5e", num);
   } else {
     buf->lst += snprintf(buf->lst, MAX_NUM_STR_SZ, "%.5f", num);
@@ -320,7 +322,9 @@ void httpJsonFloat(JsonBuf* buf, float num) {
 void httpJsonDouble(JsonBuf* buf, double num) {
   httpJsonItemToken(buf);
   httpJsonTestBuf(buf, MAX_NUM_STR_SZ);
-  if (num > 1E10 || num < -1E10) {
+  if (isinf(num) || isnan(num)) {
+    buf->lst += snprintf(buf->lst, MAX_NUM_STR_SZ, "null");
+  } else if (num > 1E10 || num < -1E10) {
     buf->lst += snprintf(buf->lst, MAX_NUM_STR_SZ, "%.9e", num);
   } else {
     buf->lst += snprintf(buf->lst, MAX_NUM_STR_SZ, "%.9f", num);