diff --git a/addon_installer/etc/www/update-check.cgi b/addon_installer/etc/www/update-check.cgi
index b1240f0..b774951 100644
--- a/addon_installer/etc/www/update-check.cgi
+++ b/addon_installer/etc/www/update-check.cgi
@@ -3,12 +3,27 @@
set version_url "https://raw.githubusercontent.com/thkl/hap-homematic/master/addon_installer/VERSION"
set package_url "https://github.com/thkl/hap-homematic/releases/latest"
-set cmd ""
-if {[info exists env(QUERY_STRING)]} {
- regexp {cmd=([^&]+)} $env(QUERY_STRING) match cmd
+catch {
+ set input $env(QUERY_STRING)
+ set pairs [split $input &]
+ foreach pair $pairs {
+ if {0 != [regexp "^(\[^=]*)=(.*)$" $pair dummy varname val]} {
+ set $varname $val
+ }
+ }
}
-if {$cmd == "download"} {
- puts "${package_url}"
+
+if { [info exists cmd ] && $cmd == "download"} {
+ puts -nonewline "Content-Type: text/html; charset=utf-8\r\n\r\n"
+ puts -nonewline ""
} else {
- puts [exec /usr/bin/wget -q --no-check-certificate -O- "${version_url}"]
-}
\ No newline at end of file
+ puts -nonewline "Content-Type: text/plain; charset=utf-8\r\n\r\n"
+ catch {
+ set newversion [ exec /usr/bin/wget -qO- --no-check-certificate $version_url ]
+ }
+ if { [info exists newversion] } {
+ puts $newversion
+ } else {
+ puts "n/a"
+ }
+}