fix for using in mode: set -u

cgibashopts

@@ -49,8 +49,8 @@ urldecode() {
  echo "$r"
 }
 
-if [ "$REQUEST_METHOD" = POST ]; then
- if [[ $CONTENT_TYPE =~ ^multipart/form-data\;[[:space:]]*boundary=([^\;]+) ]]; then
+if [ "${REQUEST_METHOD:-}" = POST ]; then
+ if [[ ${CONTENT_TYPE:-} =~ ^multipart/form-data\;[[:space:]]*boundary=([^\;]+) ]]; then
  sep="--${BASH_REMATCH[1]}"
  OIFS="$IFS"; IFS=$'\r'
  while read -r line; do
@@ -100,16 +100,16 @@ if [ "$REQUEST_METHOD" = POST ]; then
  declare -x FORM_$var="$val"
  fi
  done
- s="$QUERY_STRING"
+ s="${QUERY_STRING:-}"
  IFS="$OIFS"
  unset OIFS
  else
  stdin=$(cat) # indirection to avoid issues with terminating newlines
- s="${stdin}&${QUERY_STRING}"
+ s="${stdin}&${QUERY_STRING:-}"
  unset stdin
  fi
 else
- s="$QUERY_STRING"
+ s="${QUERY_STRING:-}"
 fi
 
 # regular (no file uploads) arguments processing