@dinoboff/ims-lti/lib/redis-nonce-store.js

Module for building an LTI Tool Provider and accept LTI launch requests

// Generated by CoffeeScript 1.12.7
(function() {
  var EXPIRE_IN_SEC, NonceStore, RedisNonceStore, exports,
    extend = 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; },
    hasProp = {}.hasOwnProperty;

  NonceStore = require('./nonce-store');

  EXPIRE_IN_SEC = 5 * 60;

  RedisNonceStore = (function(superClass) {
    extend(RedisNonceStore, superClass);

    function RedisNonceStore(redisClient) {
      if (typeof redisClient === 'string' && arguments.length === 2) {
        redisClient = arguments[1];
      }
      this.redis = redisClient;
    }

    RedisNonceStore.prototype.isNew = function(nonce, timestamp, next) {
      var currentTime, freshTimestamp;
      if (next == null) {
        next = function() {};
      }
      if (typeof nonce === 'undefined' || nonce === null || typeof nonce === 'function' || typeof timestamp === 'function' || typeof timestamp === 'undefined') {
        return next(new Error('Invalid parameters'), false);
      }
      if (typeof timestamp === 'undefined' || timestamp === null) {
        return next(new Error('Timestamp required'), false);
      }
      currentTime = Math.round(Date.now() / 1000);
      freshTimestamp = (currentTime - parseInt(timestamp, 10)) <= EXPIRE_IN_SEC;
      if (!freshTimestamp) {
        return next(new Error('Expired timestamp'), false);
      }
      return this.redis.get(nonce, (function(_this) {
        return function(err, seen) {
          if (seen) {
            return next(new Error('Nonce already seen'), false);
          }
          _this.setUsed(nonce, timestamp);
          return next(null, true);
        };
      })(this));
    };

    RedisNonceStore.prototype.setUsed = function(nonce, timestamp, next) {
      if (next == null) {
        next = function() {};
      }
      this.redis.set(nonce, timestamp);
      this.redis.expire(nonce, EXPIRE_IN_SEC);
      return next(null);
    };

    return RedisNonceStore;

  })(NonceStore);

  exports = module.exports = RedisNonceStore;

}).call(this);