URLのリダイレクトをたどる #rsspipes

rss-pipes-get-final-link.js

function rssPipesFilterFunction(articles) {
  var promises = [];
  articles.forEach(function(article) {
    var maxRedirects = 5;
    var loop = function() {
      var promise = getRedirectURL(article.link).then(function(link) {
        if (article.link === link || --maxRedirects < 0) {
          return article;
        } else {
          article.link = link;
          return loop();
        }
      });
      return promise;
    };
    promises.push(loop());
  });
  return Q.all(promises);
}

/*
 * Copyright (c) 2014 Daishi Kato
 * Licensed under the MIT License
 * http://www.opensource.org/licenses/mit-license.php
 */