Decoding URL
For encoding URL, you can use method UNESCAPE_URL from mentioned class.
 
DATA: lv_unescaped TYPE string,
      lv_escaped   TYPE string.

CALL METHOD cl_http_utility=>unescape_url
  EXPORTING
    escaped = lv_escaped
  RECEIVING
    unescaped = lv_unescaped.

   
DATA: lv_unescaped TYPE string,
      lv_escaped   TYPE string.

CALL METHOD cl_http_utility=>unescape_url
  EXPORTING
    escaped = lv_escaped
  RECEIVING
    unescaped = lv_unescaped.

OR the same simplier way as above:
lv_unescaped = cl_http_utility=>unescape_url( lv_escaped ).

 Serkan AKKAVAK
Computer Engineer
serkurumsal@yandex.com