From a544f162c97ef2fa66a7b39f62ea17f2f411cf83 Mon Sep 17 00:00:00 2001
From: firest <blankalupo@163.com>
Date: Wed, 26 Jan 2022 11:08:12 +0800
Subject: [PATCH] fix(emqx_coap): handle invalid query string in parse

---
 apps/emqx_gateway/src/coap/emqx_coap_frame.erl | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/apps/emqx_gateway/src/coap/emqx_coap_frame.erl b/apps/emqx_gateway/src/coap/emqx_coap_frame.erl
index ba086b1bb..cc14643da 100644
--- a/apps/emqx_gateway/src/coap/emqx_coap_frame.erl
+++ b/apps/emqx_gateway/src/coap/emqx_coap_frame.erl
@@ -266,9 +266,12 @@ parse(<<?VERSION:2, Type:2, TKL:4, Class:3, Code:5, MsgId:16, Token:TKL/binary,
 
 get_option_val(uri_query, V) ->
     KVList = lists:foldl(fun(E, Acc) ->
-                                 [Key, Val] = re:split(E, "="),
-                                 [{Key, Val} | Acc]
-
+                                 case re:split(E, "=") of
+                                     [Key, Val] ->
+                                         [{Key, Val} | Acc];
+                                     _ ->
+                                         Acc
+                                 end
                          end,
                          [],
                          V),