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SteamService.getGroupMembers = function(steam_id, callback) {
  callback = callback || noop;
  var url = 'http://steamcommunity.com';
  if (/\d{3,10}/.test(steam_id)) {
    steam_id = calculateSteamGroupId64(steam_id);
    url += '/gid/';
  } else {
    url += '/groups/';
  }
  url += steam_id + '/memberslistxml/?xml=1';
  getMemberList(url, 5, callback);
};

function getMemberList(url, retries_left, callback) {
  var d = domain.create();
  function parseMemberList(data) {
    if (steamGroupError) {
      console.log("No group found, quitting");
      return callback(new Error("Invalid URL for group"), []);
    }
    d.run(function() {
      parseString(data, function(err, result) {
        if (err) {
          console.error("Error while parsing xml, retrying");
          setImmediate(getMemberList.bind(null, url, retries_left - 1, callback));
        } else {
          callback(null, result.memberList.members[0].steamID64);
        }
      });
    });
  }

  d.on('error', function(err) {
    console.error("Error while parsing xml, retrying");
    getMemberList.bind(null, url, retries_left - 1, callback);
  });

  if (retries_left > 0) {
    rest.get(url).on('complete', parseMemberList);
  } else {
    return callback(new Error("Problem with Steam API, please try again"), []);
  }
}