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47 lines
1.2 KiB
47 lines
1.2 KiB
define(function() {
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"use strict";
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// 2011/01/01 in UTC
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var epoch = 1293840000;
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var decode = function(str) {
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return atob(str + new Array((((- str.length) % 4 + 4) % 4) + 1).join("="));
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};
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var timestamp = function(str) {
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var bytes = [];
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for (var i = 0; i < str.length; i++) {
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bytes.push(str.charCodeAt(i));
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}
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var a = 0;
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for (var j = 0; j < bytes.length; j++) {
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a = a << 8 | +bytes[j];
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}
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return a + epoch;
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};
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/*
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* Load data signed with itsdangerous' URLSafeTimedSerializer.
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*
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* If no signature was found or the payload has been expired, return
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* `null`. Otherwise, return unserialized datastructure.
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*/
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return function(val, max_age) {
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var _ = val.split(".", 3),
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payload = _[0], ts = _[1], signature = _[2];
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if (typeof signature === "undefined") {
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return null;
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}
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var age = (new Date()).getTime() / 1000 - timestamp(decode(ts));
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if (typeof max_age !== "undefined" && age > max_age) {
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return null;
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}
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return JSON.parse(decode(payload));
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};
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}); |