dom/activities/src/ActivitiesServiceFilter.jsm@97036ab72558 (annotated)
dom/activities/src/ActivitiesServiceFilter.jsm
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 3 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | "use strict" |
| michael@0 | 6 | |
| michael@0 | 7 | this.EXPORTED_SYMBOLS = ['ActivitiesServiceFilter']; |
| michael@0 | 8 | |
| michael@0 | 9 | this.ActivitiesServiceFilter = { |
| michael@0 | 10 | match: function(aValues, aFilters) { |
| michael@0 | 11 | |
| michael@0 | 12 | function matchValue(aValue, aFilter, aFilterObj) { |
| michael@0 | 13 | if (aFilter !== null) { |
| michael@0 | 14 | // Custom functions for the different types. |
| michael@0 | 15 | switch (typeof(aFilter)) { |
| michael@0 | 16 | case 'boolean': |
| michael@0 | 17 | return aValue === aFilter; |
| michael@0 | 18 | |
| michael@0 | 19 | case 'number': |
| michael@0 | 20 | return Number(aValue) === aFilter; |
| michael@0 | 21 | |
| michael@0 | 22 | case 'string': |
| michael@0 | 23 | return String(aValue) === aFilter; |
| michael@0 | 24 | |
| michael@0 | 25 | default: // not supported |
| michael@0 | 26 | return false; |
| michael@0 | 27 | } |
| michael@0 | 28 | } |
| michael@0 | 29 | |
| michael@0 | 30 | // Pattern. |
| michael@0 | 31 | if (('pattern' in aFilterObj)) { |
| michael@0 | 32 | var pattern = String(aFilterObj.pattern); |
| michael@0 | 33 | |
| michael@0 | 34 | var patternFlags = ''; |
| michael@0 | 35 | if (('patternFlags' in aFilterObj)) { |
| michael@0 | 36 | patternFlags = String(aFilterObj.patternFlags); |
| michael@0 | 37 | } |
| michael@0 | 38 | |
| michael@0 | 39 | var re = new RegExp('^(?:' + pattern + ')$', patternFlags); |
| michael@0 | 40 | return re.test(aValue); |
| michael@0 | 41 | } |
| michael@0 | 42 | |
| michael@0 | 43 | // Validation of the min/Max. |
| michael@0 | 44 | if (('min' in aFilterObj) || ('max' in aFilterObj)) { |
| michael@0 | 45 | // Min value. |
| michael@0 | 46 | if (('min' in aFilterObj) && |
| michael@0 | 47 | aFilterObj.min > aValue) { |
| michael@0 | 48 | return false; |
| michael@0 | 49 | } |
| michael@0 | 50 | |
| michael@0 | 51 | // Max value. |
| michael@0 | 52 | if (('max' in aFilterObj) && |
| michael@0 | 53 | aFilterObj.max < aValue) { |
| michael@0 | 54 | return false; |
| michael@0 | 55 | } |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | return true; |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | // this function returns true if the value matches with the filter object |
| michael@0 | 62 | function matchObject(aValue, aFilterObj) { |
| michael@0 | 63 | |
| michael@0 | 64 | // Let's consider anything an array. |
| michael@0 | 65 | let filters = ('value' in aFilterObj) |
| michael@0 | 66 | ? (Array.isArray(aFilterObj.value) |
| michael@0 | 67 | ? aFilterObj.value |
| michael@0 | 68 | : [aFilterObj.value]) |
| michael@0 | 69 | : [ null ]; |
| michael@0 | 70 | let values = Array.isArray(aValue) ? aValue : [aValue]; |
| michael@0 | 71 | |
| michael@0 | 72 | for (var filterId = 0; filterId < filters.length; ++filterId) { |
| michael@0 | 73 | for (var valueId = 0; valueId < values.length; ++valueId) { |
| michael@0 | 74 | if (matchValue(values[valueId], filters[filterId], aFilterObj)) { |
| michael@0 | 75 | return true; |
| michael@0 | 76 | } |
| michael@0 | 77 | } |
| michael@0 | 78 | } |
| michael@0 | 79 | |
| michael@0 | 80 | return false; |
| michael@0 | 81 | } |
| michael@0 | 82 | |
| michael@0 | 83 | // Creation of a filter map useful to know what has been |
| michael@0 | 84 | // matched and what is not. |
| michael@0 | 85 | let filtersMap = {} |
| michael@0 | 86 | for (let filter in aFilters) { |
| michael@0 | 87 | // Convert this filter in an object if needed |
| michael@0 | 88 | let filterObj = aFilters[filter]; |
| michael@0 | 89 | |
| michael@0 | 90 | if (Array.isArray(filterObj) || typeof(filterObj) !== 'object') { |
| michael@0 | 91 | filterObj = { |
| michael@0 | 92 | required: false, |
| michael@0 | 93 | value: filterObj |
| michael@0 | 94 | } |
| michael@0 | 95 | } |
| michael@0 | 96 | |
| michael@0 | 97 | filtersMap[filter] = { filter: filterObj, |
| michael@0 | 98 | found: false }; |
| michael@0 | 99 | } |
| michael@0 | 100 | |
| michael@0 | 101 | // For any incoming property. |
| michael@0 | 102 | for (let prop in aValues) { |
| michael@0 | 103 | // If this is unknown for the app, let's continue. |
| michael@0 | 104 | if (!(prop in filtersMap)) { |
| michael@0 | 105 | continue; |
| michael@0 | 106 | } |
| michael@0 | 107 | |
| michael@0 | 108 | if (Array.isArray(aValues[prop]) && aValues[prop].length == 0) { |
| michael@0 | 109 | continue; |
| michael@0 | 110 | } |
| michael@0 | 111 | |
| michael@0 | 112 | // Otherwise, let's check the value against the filter. |
| michael@0 | 113 | if (!matchObject(aValues[prop], filtersMap[prop].filter)) { |
| michael@0 | 114 | return false; |
| michael@0 | 115 | } |
| michael@0 | 116 | |
| michael@0 | 117 | filtersMap[prop].found = true; |
| michael@0 | 118 | } |
| michael@0 | 119 | |
| michael@0 | 120 | // Required filters: |
| michael@0 | 121 | for (let filter in filtersMap) { |
| michael@0 | 122 | if (filtersMap[filter].filter.required && !filtersMap[filter].found) { |
| michael@0 | 123 | return false; |
| michael@0 | 124 | } |
| michael@0 | 125 | } |
| michael@0 | 126 | |
| michael@0 | 127 | return true; |
| michael@0 | 128 | } |
| michael@0 | 129 | } |
