Untitled

tArgs = {...}
if #tArgs < 1 then
  print('Usage: print_urls <url>')
  return
end

url = tArgs[1]

page = http.get(url)
h = html.parsestr(page.readAll())
root = h

function search(obj)
  local res = {}
  if type(obj) == 'table' then
    if(obj._tag and (obj._tag == 'a') ) then
      if type(obj[1]) == 'string' then
        table.insert(res, {obj[1], obj._attr.href})
      end
    else
      for i,v in ipairs(obj) do
        local res2 = search(v)
        for j,w in ipairs(res2) do
          table.insert(res, w)
        end
      end
    end
  end
  return res
end

local urls = search(root)
textutils.tabulate( unpack(urls) )