From 7483d3b229aeba6dfae03d15c3e71d05a71e18b5 Mon Sep 17 00:00:00 2001
From: cschwinne <dev.aircoookie@gmail.com>
Date: Wed, 30 Jun 2021 18:21:56 +0200
Subject: [PATCH] Fixed settings page broken by using "%" in input fields
 (fixes #1516 )

---
 CHANGELOG.md   |  4 ++++
 wled00/wled.h  |  2 +-
 wled00/xml.cpp | 17 ++++++++++++++---
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 88ced99ca..c53f4e744 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ### Builds after release 0.12.0
 
+#### Build 2106302
+
+-   Fixed settings page broken by using "%" in input fields
+
 #### Build 2106301
 
 -   Fixed a problem with disabled buttons reverting to pin 0 causing conflict
diff --git a/wled00/wled.h b/wled00/wled.h
index 2bcfa6b61..662f84b0f 100644
--- a/wled00/wled.h
+++ b/wled00/wled.h
@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2106301
+#define VERSION 2106302
 
 //uncomment this if you have a "my_config.h" file you'd like to use
 //#define WLED_USE_MY_CONFIG
diff --git a/wled00/xml.cpp b/wled00/xml.cpp
index c12991fe6..aef0ec297 100644
--- a/wled00/xml.cpp
+++ b/wled00/xml.cpp
@@ -158,13 +158,24 @@ void sappends(char stype, const char* key, char* val)
 {
   switch(stype)
   {
-    case 's': //string (we can interpret val as char*)
+    case 's': { //string (we can interpret val as char*)
       oappend("d.Sf.");
       oappend(key);
       oappend(".value=\"");
-      oappend(val);
+      //convert "%" to "%%" to make EspAsyncWebServer happy
+      char buf[130];
+      uint8_t len = strlen(val) +1;
+      uint8_t s = 0;
+      for (uint8_t i = 0; i < len; i++) {
+        buf[i+s] = val[i];
+        if (val[i] == '%') {
+          s++; buf[i+s] = '%';
+        }
+      }
+
+      oappend(buf);
       oappend("\";");
-      break;
+      break; }
     case 'm': //message
       oappend(SET_F("d.getElementsByClassName"));
       oappend(key);