_M.parseResolvConf = function()

in kong/kong/resty/dns/utils.lua [152:196]

• 45 lines of code
• 14 McCabe index (conditional complexity)

_M.parseResolvConf = function(filename)
  local lines
  if type(filename) == "table" then
    lines = filename
  else
    local err
    lines, err = utils.readlines(filename or _M.DEFAULT_RESOLV_CONF)
    if not lines then return lines, err end
  end
  local result = {}
  for _,line in ipairs(lines) do
    local data, _ = line:match(PATT_COMMENT)
    if data then
      local option, details = data:match("^%s*(%a+)%s+(.-)%s*$")
      if option == "nameserver" then
        result.nameserver = result.nameserver or {}
        if #result.nameserver < _M.MAXNS then
          tinsert(result.nameserver, details:lower())
        end
      elseif option == "domain" then
        result.search = nil  
        result.domain = details:lower()
      elseif option == "search" then
        result.domain = nil  
        local search = {}
        result.search = search
        for host in details:gmatch("%S+") do
          if #search < _M.MAXSEARCH then
            tinsert(search, host:lower())
          end
        end
      elseif option == "sortlist" then
        local list = {}
        result.sortlist = list
        for ips in details:gmatch("%S+") do
          tinsert(list, ips)
        end
      elseif option == "options" then
        result.options = result.options or {}
        parseOption(result.options, details)
      end
    end
  end
  return result
end