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annotate js/modules/cache.js @ 82:03bf0a1b85da

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made 'storage' point to sessionStorage instead of localStorage
author Atul Varma <avarma@mozilla.com>
date Mon, 26 Apr 2010 04:32:50 -0700
parents e3de1fe32f40
children 00d23d6d41b4
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1 Require.modules["cache"] = function(exports, require) {
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2 const CACHE_NAME = "cache";
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3
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4 var storage = require("storage");
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5 var cache = storage.getItem(CACHE_NAME);
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6
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7 if (cache)
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8 cache = JSON.parse(cache);
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9 else
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10 cache = {};
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12 exports.set = function set(key, value) {
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13 cache[key] = value;
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14
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15 // Remove the key first, to get around a strange iPad
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16 // issue: http://stackoverflow.com/questions/2603682/is-anyone-else-receiving-a-quota-exceeded-err-on-their-ipad-when-accessing-locals
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17 storage.removeItem(CACHE_NAME);
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18
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19 // TODO: We should really catch QUOTA_EXCEEDED_ERR here,
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20 // which could be thrown if the user is in private
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21 // browsing mode.
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22 storage.setItem(CACHE_NAME, JSON.stringify(cache));
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23 };
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24
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25 exports.get = function get(key) {
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26 return cache[key];
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27 };
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29 exports.clear = function clear() {
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30 storage.removeItem(CACHE_NAME);
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31 cache = {};
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32 };
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33 };