prosody
0.11.12
spec/util_throttle_spec.lua

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spec/util_throttle_spec.lua @ 12181:783056b4e448 0.11 0.11.12

util.xml: Do not allow doctypes, comments or processing instructions Yes. This is as bad as it sounds. CVE pending. In Prosody itself, this only affects mod_websocket, which uses util.xml to parse the <open/> frame, thus allowing unauthenticated remote DoS using Billion Laughs. However, third-party modules using util.xml may also be affected by this. This commit installs handlers which disallow the use of doctype declarations and processing instructions without any escape hatch. It, by default, also introduces such a handler for comments, however, there is a way to enable comments nontheless. This is because util.xml is used to parse human-facing data, where comments are generally a desirable feature, and also because comments are generally harmless.
author Jonas Schäfer <jonas@wielicki.name>
date Mon, 10 Jan 2022 18:23:54 +0100
parent 8473:f024cb5acc25
child 9993:02a41315d275
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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3 -- Mock util.time
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4 local now = 0; -- wibbly-wobbly... timey-wimey... stuff
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5 local function later(n)
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6 now = now + n; -- time passes at a different rate
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7 end
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8 package.loaded["util.time"] = {
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9 now = function() return now; end
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10 }
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13 local throttle = require "util.throttle";
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14
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15 describe("util.throttle", function()
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16 describe("#create()", function()
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17 it("should be created with correct values", function()
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18 now = 5;
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19 local a = throttle.create(3, 10);
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20 assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 });
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22 local a = throttle.create(3, 5);
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23 assert.same(a, { balance = 3, max = 3, rate = 0.6, t = 5 });
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25 local a = throttle.create(1, 1);
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26 assert.same(a, { balance = 1, max = 1, rate = 1, t = 5 });
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28 local a = throttle.create(10, 10);
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29 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 });
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31 local a = throttle.create(10, 1);
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32 assert.same(a, { balance = 10, max = 10, rate = 10, t = 5 });
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33 end);
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34 end);
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35
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36 describe("#update()", function()
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37 it("does nothing when no time has passed, even if balance is not full", function()
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38 now = 5;
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39 local a = throttle.create(10, 10);
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40 for i=1,5 do
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41 a:update();
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42 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 });
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43 end
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44 a.balance = 0;
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45 for i=1,5 do
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46 a:update();
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47 assert.same(a, { balance = 0, max = 10, rate = 1, t = 5 });
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48 end
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49 end);
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50 it("updates only time when time passes but balance is full", function()
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51 now = 5;
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52 local a = throttle.create(10, 10);
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53 for i=1,5 do
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54 later(5);
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55 a:update();
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56 assert.same(a, { balance = 10, max = 10, rate = 1, t = 5 + i*5 });
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57 end
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58 end);
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59 it("updates balance when balance has room to grow as time passes", function()
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60 now = 5;
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61 local a = throttle.create(10, 10);
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62 a.balance = 0;
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63 assert.same(a, { balance = 0, max = 10, rate = 1, t = 5 });
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64
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65 later(1);
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66 a:update();
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67 assert.same(a, { balance = 1, max = 10, rate = 1, t = 6 });
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68
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69 later(3);
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70 a:update();
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71 assert.same(a, { balance = 4, max = 10, rate = 1, t = 9 });
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72
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73 later(10);
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74 a:update();
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75 assert.same(a, { balance = 10, max = 10, rate = 1, t = 19 });
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76 end);
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77 it("handles 10 x 0.1s updates the same as 1 x 1s update ", function()
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78 now = 5;
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79 local a = throttle.create(1, 1);
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80
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81 a.balance = 0;
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82 later(1);
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83 a:update();
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84 assert.same(a, { balance = 1, max = 1, rate = 1, t = now });
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85
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86 a.balance = 0;
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87 for i=1,10 do
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88 later(0.1);
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89 a:update();
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90 end
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91 assert(math.abs(a.balance - 1) < 0.0001); -- incremental updates cause rouding errors
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92 end);
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93 end);
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94
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95 -- describe("po")
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96
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97 describe("#poll()", function()
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98 it("should only allow successful polls until cost is hit", function()
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99 now = 5;
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100
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101 local a = throttle.create(3, 10);
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102 assert.same(a, { balance = 3, max = 3, rate = 0.3, t = 5 });
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103
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104 assert.is_true(a:poll(1)); -- 3 -> 2
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105 assert.same(a, { balance = 2, max = 3, rate = 0.3, t = 5 });
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106
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107 assert.is_true(a:poll(2)); -- 2 -> 1
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108 assert.same(a, { balance = 0, max = 3, rate = 0.3, t = 5 });
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109
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110 assert.is_false(a:poll(1)); -- MEEP, out of credits!
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111 assert.is_false(a:poll(1)); -- MEEP, out of credits!
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112 assert.same(a, { balance = 0, max = 3, rate = 0.3, t = 5 });
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113 end);
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114
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115 it("should not allow polls more than the cost", function()
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116 now = 0;
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117
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118 local a = throttle.create(10, 10);
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119 assert.same(a, { balance = 10, max = 10, rate = 1, t = 0 });
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120
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121 assert.is_false(a:poll(11));
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122 assert.same(a, { balance = 10, max = 10, rate = 1, t = 0 });
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123
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124 assert.is_true(a:poll(6));
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125 assert.same(a, { balance = 4, max = 10, rate = 1, t = 0 });
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126
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127 assert.is_false(a:poll(5));
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128 assert.same(a, { balance = 4, max = 10, rate = 1, t = 0 });
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129
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130 -- fractional
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131 assert.is_true(a:poll(3.5));
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132 assert.same(a, { balance = 0.5, max = 10, rate = 1, t = 0 });
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133
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134 assert.is_true(a:poll(0.25));
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135 assert.same(a, { balance = 0.25, max = 10, rate = 1, t = 0 });
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136
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137 assert.is_false(a:poll(0.3));
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138 assert.same(a, { balance = 0.25, max = 10, rate = 1, t = 0 });
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139
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140 assert.is_true(a:poll(0.25));
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141 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
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142
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143 assert.is_false(a:poll(0.1));
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144 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
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145
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146 assert.is_true(a:poll(0));
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147 assert.same(a, { balance = 0, max = 10, rate = 1, t = 0 });
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148 end);
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149 end);
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150 end);