1 'use strict'; 2 3 (function () { 4 var random_count = 0; 5 var random_count_threshold = 25; 6 var random_seed = 0.462; 7 Math.random = function() { 8 random_count++; 9 if (random_count > random_count_threshold){ 10 random_seed += 0.1; 11 random_count = 1; 12 } 13 return (random_seed % 1); 14 }; 15 if (typeof(crypto) == 'object' && 16 typeof(crypto.getRandomValues) == 'function') { 17 crypto.getRandomValues = function(arr) { 18 var scale = Math.pow(256, arr.BYTES_PER_ELEMENT); 19 for (var i = 0; i < arr.length; i++) { 20 arr[i] = Math.floor(Math.random() * scale); 21 } 22 return arr; 23 }; 24 } 25 })(); 26 (function () { 27 var date_count = 0; 28 var date_count_threshold = 25; 29 var orig_date = Date; 30 // This should be replaced by web page replay by corresponding date 31 // (usually the date when the recording was done) 32 var time_seed = {{WPR_TIME_SEED_TIMESTAMP}}; 33 Date = function() { 34 if (this instanceof Date) { 35 date_count++; 36 if (date_count > date_count_threshold){ 37 time_seed += 50; 38 date_count = 1; 39 } 40 switch (arguments.length) { 41 case 0: return new orig_date(time_seed); 42 case 1: return new orig_date(arguments[0]); 43 default: return new orig_date(arguments[0], arguments[1], 44 arguments.length >= 3 ? arguments[2] : 1, 45 arguments.length >= 4 ? arguments[3] : 0, 46 arguments.length >= 5 ? arguments[4] : 0, 47 arguments.length >= 6 ? arguments[5] : 0, 48 arguments.length >= 7 ? arguments[6] : 0); 49 } 50 } 51 return new Date().toString(); 52 }; 53 Date.__proto__ = orig_date; 54 Date.prototype = orig_date.prototype; 55 Date.prototype.constructor = Date; 56 orig_date.now = function() { 57 return new Date().getTime(); 58 }; 59 orig_date.prototype.getTimezoneOffset = function() { 60 var dst2010Start = 1268560800000; 61 var dst2010End = 1289120400000; 62 if (this.getTime() >= dst2010Start && this.getTime() < dst2010End) 63 return 420; 64 return 480; 65 }; 66 })(); 67
