pro sock_copy,url,out_name,_ref_extra=extra,background=background,$
             old_way=old_way

if keyword_set(background) then begin
 thread,'sock_copy',url,out_name,_extra=extra,old_way=old_way
 return
endif

extra=rem_dup_keywords(extra)
old_way=keyword_set(old_way)
if old_way then sock_copy_old,url,out_name,_extra=extra else $
 sock_get,url,out_name,_extra=extra

return & end