Nightmareで郵便局から住所をスクレイピング ref: http://qiita.com/piyo7/items/d771559c0fb1386f1ffa

file0.html

<tr>
  <td class="data"><small>100-0001</small></td>
  <td class="data"><small>東京都</small></td>
  <td class="data"><small>千代田区</small></td>
  <td>
  <div class="data">
    <p><small><a href="zipcode.php?pref=13&city=1131010&id=46366&merge=">千代田</a></small></p>
    <p class="comment"><small>チヨダ</small></p>
  </div>
</td>

file2.txt

> node main.js 1000001

〒100-0001 東京都千代田区千代田

file4.txt

> node -v
v4.2.1

main.js

'use strict';

var Nightmare = require('nightmare');
var nightmare = Nightmare();

Promise.resolve(
  nightmare.
    goto('http://www.post.japanpost.jp/zipcode/index.html').
    type('input[name="zip"]', process.argv[2]).
    click('input[src="/img/zipcode/btn_add_search_s.gif"]').
    wait('.data').
    evaluate(() => {
      var data = document.getElementsByClassName('data');
      return {
        zip:  data[0].innerText,
        pref: data[1].innerText,
        city: data[2].innerText,
        aza:  data[3].children[0].innerText
      };
    }
  )
).
  then((address) => {
    console.log('〒' + address.zip + ' ' + address.pref + address.city + address.aza);
  }).
  catch(console.error);

nightmare.end();

pacakge.json

{
  "dependencies": {
    "nightmare": "^2.0.7"
  }
}