private void replaceHeaders ( URLRewritingConfig config , HeaderMap headers ) { for ( Entry < String , String > entry : headers ) { String key = entry . getKey ( ) ; String value = entry . getValue ( ) ; value = doHeaderReplaceAll ( value , config . getFromRegex ( ) , config . getToReplacement ( ) ) ; if ( value != null ) { headers . put ( key , value ) ; } } }
Perform replacement .