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paiza.ioでelixirAdvent Calendar 2022

Day 20

paiza.ioでelixir その95

Last updated at Posted at 2022-11-24

概要

paiza.ioでelixirやってみた。
練習問題やってみた。

練習問題

api叩いて、郵便番号から、住所を求めよ。

サンプルコード


:inets.start
:ssl.start


defmodule Main do
	require Record
	Record.defrecord :xmlElement, Record.extract(:xmlElement, from_lib: "xmerl/include/xmerl.hrl")
	Record.defrecord :xmlAttribute, Record.extract(:xmlAttribute, from_lib: "xmerl/include/xmerl.hrl")
	@targets [:state, :city, :address, :state_kana, :city_kana, :address_kana]
	def is_target?(attribute) do
		xmlAttribute(attribute, :name) in @targets
	end
	def parse_address(address_node) do
		attributes = :xmerl_xpath.string('//value', address_node)
			|> Enum.map(&(xmlElement(&1, :attributes)))
			|> Enum.map(fn elems ->
				elems
				|> Enum.filter(&is_target?/1)
			end)
			|> List.flatten
		keys = attributes
			|> Enum.map(&(xmlAttribute(&1, :name)))
		values = attributes
			|> Enum.map(&(to_string xmlAttribute(&1, :value)))
		Enum.into(List.zip([keys, values]), %{})
	end
	def parse_xml(body) do
		{document, _} = body
			|> :binary.bin_to_list
			|> :xmerl_scan.string
		parsed = :xmerl_xpath.string('//ADDRESS_value', document)
			|> Enum.map(&parse_address/1)
	end
    def main() do
        {:ok, {_status, _headers, body}} = :httpc.request('http://zip.cgis.biz/xml/zip.php?zn=9980001')
        body
        body = IO.iodata_to_binary(body)
        parse_xml(body)
        |> IO.inspect
    end
end
Main.main



実行結果

[
  %{
    address: "穂積(その他)",
    address_kana: "ホヅミ(ソノタ)",
    city: "酒田市",
    city_kana: "サカタシ",
    state: "山形県",
    state_kana: "ヤマガタケン"
  }
]

成果物

以上。

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