epub.js/libs/annotator/lib/plugin/auth.js

// Generated by CoffeeScript 1.6.3
var base64Decode, base64UrlDecode, createDateFromISO8601, parseToken,
  __hasProp = {}.hasOwnProperty,
  __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

createDateFromISO8601 = function(string) {
  var d, date, offset, regexp, time, _ref;
  regexp = "([0-9]{4})(-([0-9]{2})(-([0-9]{2})" + "(T([0-9]{2}):([0-9]{2})(:([0-9]{2})(\\.([0-9]+))?)?" + "(Z|(([-+])([0-9]{2}):([0-9]{2})))?)?)?)?";
  d = string.match(new RegExp(regexp));
  offset = 0;
  date = new Date(d[1], 0, 1);
  if (d[3]) {
    date.setMonth(d[3] - 1);
  }
  if (d[5]) {
    date.setDate(d[5]);
  }
  if (d[7]) {
    date.setHours(d[7]);
  }
  if (d[8]) {
    date.setMinutes(d[8]);
  }
  if (d[10]) {
    date.setSeconds(d[10]);
  }
  if (d[12]) {
    date.setMilliseconds(Number("0." + d[12]) * 1000);
  }
  if (d[14]) {
    offset = (Number(d[16]) * 60) + Number(d[17]);
    offset *= (_ref = d[15] === '-') != null ? _ref : {
      1: -1
    };
  }
  offset -= date.getTimezoneOffset();
  time = Number(date) + (offset * 60 * 1000);
  date.setTime(Number(time));
  return date;
};

base64Decode = function(data) {
  var ac, b64, bits, dec, h1, h2, h3, h4, i, o1, o2, o3, tmp_arr;
  if (typeof atob !== "undefined" && atob !== null) {
    return atob(data);
  } else {
    b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    i = 0;
    ac = 0;
    dec = "";
    tmp_arr = [];
    if (!data) {
      return data;
    }
    data += '';
    while (i < data.length) {
      h1 = b64.indexOf(data.charAt(i++));
      h2 = b64.indexOf(data.charAt(i++));
      h3 = b64.indexOf(data.charAt(i++));
      h4 = b64.indexOf(data.charAt(i++));
      bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
      o1 = bits >> 16 & 0xff;
      o2 = bits >> 8 & 0xff;
      o3 = bits & 0xff;
      if (h3 === 64) {
        tmp_arr[ac++] = String.fromCharCode(o1);
      } else if (h4 === 64) {
        tmp_arr[ac++] = String.fromCharCode(o1, o2);
      } else {
        tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
      }
    }
    return tmp_arr.join('');
  }
};

base64UrlDecode = function(data) {
  var i, m, _i, _ref;
  m = data.length % 4;
  if (m !== 0) {
    for (i = _i = 0, _ref = 4 - m; 0 <= _ref ? _i < _ref : _i > _ref; i = 0 <= _ref ? ++_i : --_i) {
      data += '=';
    }
  }
  data = data.replace(/-/g, '+');
  data = data.replace(/_/g, '/');
  return base64Decode(data);
};

parseToken = function(token) {
  var head, payload, sig, _ref;
  _ref = token.split('.'), head = _ref[0], payload = _ref[1], sig = _ref[2];
  return JSON.parse(base64UrlDecode(payload));
};

Annotator.Plugin.Auth = (function(_super) {
  __extends(Auth, _super);

  Auth.prototype.options = {
    token: null,
    tokenUrl: '/auth/token',
    autoFetch: true
  };

  function Auth(element, options) {
    Auth.__super__.constructor.apply(this, arguments);
    this.waitingForToken = [];
    if (this.options.token) {
      this.setToken(this.options.token);
    } else {
      this.requestToken();
    }
  }

  Auth.prototype.requestToken = function() {
    var _this = this;
    this.requestInProgress = true;
    return $.ajax({
      url: this.options.tokenUrl,
      dataType: 'text',
      xhrFields: {
        withCredentials: true
      }
    }).done(function(data, status, xhr) {
      return _this.setToken(data);
    }).fail(function(xhr, status, err) {
      var msg;
      msg = Annotator._t("Couldn't get auth token:");
      console.error("" + msg + " " + err, xhr);
      return Annotator.showNotification("" + msg + " " + xhr.responseText, Annotator.Notification.ERROR);
    }).always(function() {
      return _this.requestInProgress = false;
    });
  };

  Auth.prototype.setToken = function(token) {
    var _results,
      _this = this;
    this.token = token;
    this._unsafeToken = parseToken(token);
    if (this.haveValidToken()) {
      if (this.options.autoFetch) {
        this.refreshTimeout = setTimeout((function() {
          return _this.requestToken();
        }), (this.timeToExpiry() - 2) * 1000);
      }
      this.updateHeaders();
      _results = [];
      while (this.waitingForToken.length > 0) {
        _results.push(this.waitingForToken.pop()(this._unsafeToken));
      }
      return _results;
    } else {
      console.warn(Annotator._t("Didn't get a valid token."));
      if (this.options.autoFetch) {
        console.warn(Annotator._t("Getting a new token in 10s."));
        return setTimeout((function() {
          return _this.requestToken();
        }), 10 * 1000);
      }
    }
  };

  Auth.prototype.haveValidToken = function() {
    var allFields;
    allFields = this._unsafeToken && this._unsafeToken.issuedAt && this._unsafeToken.ttl && this._unsafeToken.consumerKey;
    if (allFields && this.timeToExpiry() > 0) {
      return true;
    } else {
      return false;
    }
  };

  Auth.prototype.timeToExpiry = function() {
    var expiry, issue, now, timeToExpiry;
    now = new Date().getTime() / 1000;
    issue = createDateFromISO8601(this._unsafeToken.issuedAt).getTime() / 1000;
    expiry = issue + this._unsafeToken.ttl;
    timeToExpiry = expiry - now;
    if (timeToExpiry > 0) {
      return timeToExpiry;
    } else {
      return 0;
    }
  };

  Auth.prototype.updateHeaders = function() {
    var current;
    current = this.element.data('annotator:headers');
    return this.element.data('annotator:headers', $.extend(current, {
      'x-annotator-auth-token': this.token
    }));
  };

  Auth.prototype.withToken = function(callback) {
    if (callback == null) {
      return;
    }
    if (this.haveValidToken()) {
      return callback(this._unsafeToken);
    } else {
      this.waitingForToken.push(callback);
      if (!this.requestInProgress) {
        return this.requestToken();
      }
    }
  };

  return Auth;

})(Annotator.Plugin);

/*
//@ sourceMappingURL=auth.map
*/