1 |
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2 | exports.lineEmitter = lineEmitter
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3 | exports.uuid4 = uuid4
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4 | exports.rand = rand
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5 | exports.round = round
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6 | exports.wait = wait
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7 | exports.Storage = Storage
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8 |
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9 | exports.urlRe = /^([-.\da-z]+:)?\/\/(([\da-z.]*)(?::(\d+))?)(\/.*?)(\?.*?)?(#.*)?$/
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10 | exports.domainRe = /^(?:(?:xn-|[a-z\d]+)(?:-[a-z\d]+)*(?:\.(?=.)|$)){2,}/i
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11 | exports.ipv4Re = /^(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(?:\.(?=.)|$)){4}$/
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12 | exports.ipv6Re = /^((?=.*::)(([1-9a-f][\da-f]{0,3}|0|)(:(?=[^:])|::(?!.*::)|$)){1,8}|([\da-f]{1,4}(:(?=[^:])|$)){8})$/i
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13 | exports.ip2int = ip2int
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14 | exports.int2ip = int2ip
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15 | exports.ipInNet = ipInNet
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16 |
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17 |
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18 |
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19 |
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20 |
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21 |
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22 | function lineEmitter(emitter, opts) {
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23 | opts = opts || {}
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24 |
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25 | var leftover = ""
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26 | , separator = opts.separator || /\r?\n/
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27 | , emit = opts.emit || "line"
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28 | , listen = opts.listen || "data"
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29 | , end = opts.end || "end"
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30 |
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31 | emitter
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32 | .on(listen, lineEmitterData)
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33 | .on(end, lineEmitterEnd)
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34 |
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35 | function lineEmitterData(data){
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36 | var lines = (leftover + data).split(separator)
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37 |
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38 |
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39 | leftover = lines.pop()
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40 |
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41 | for (var i = 0, len = lines.length; i < len; ) {
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42 | this.emit(emit, lines[i++], len)
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43 | }
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44 | }
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45 | function lineEmitterEnd() {
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46 | if (leftover) {
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47 | this.emit(emit, leftover)
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48 | }
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49 | leftover = ""
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50 | emitter
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51 | .removeListener(listen, lineEmitterData)
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52 | .removeListener(end, lineEmitterEnd)
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53 | }
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54 | return emitter
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55 | }
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56 |
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57 | function uuid4(a, b) {
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58 | for (a = b = ""; a++ < 36; ) {
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59 | b += a*51&52 ? ( a^15 ? 8 ^ Math.random() * (a^20?16:4) : 4 ).toString(16) : "-";
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60 | }
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61 | return b
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62 | }
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63 |
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64 | function rand(len) {
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65 | for (var out = ""; out.length < len; ) {
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66 | out += (Date.now() * Math.random()).toString(36).split(".")[0]
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67 | }
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68 | return out.slice(-len)
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69 | }
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70 |
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71 | // Rounding Errors
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72 | // Number((1.005).toFixed(2)); // 1 instead of 1.01
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73 | // Math.round(1.005*100)/100; // 1 instead of 1.01
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74 | // http://www.jacklmoore.com/notes/rounding-in-javascript/
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75 | // The rounding problem can be avoided by using numbers represented in exponential notation:
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76 |
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77 | function round(value, decimals) {
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78 | return +(Math.round(value + "e" + decimals) + "e-" + decimals)
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79 | }
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80 |
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81 |
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82 | function wait(fn, _pending) {
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83 | var pending = _pending || 0
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84 | , result = [null]
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85 |
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86 | if (typeof fn !== "function") throw TypeError("Not a function")
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87 |
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88 | function resume() {
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89 | if (--pending === 0) {
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90 | fn.apply(this, result)
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91 | }
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92 | }
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93 | resume.wait = function(pos) {
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94 | ++pending
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95 | if (pos === void 0) pos = pending
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96 | return function(err, res) {
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97 | if (err) {
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98 | pending = 0
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99 | fn.call(this, err)
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100 | } else {
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101 | result[pos] = res
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102 | resume()
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103 | }
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104 | }
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105 | }
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106 | return resume
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107 | }
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108 |
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109 | function ip2int(str) {
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110 | var t = str.split(".")
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111 | return ((t[0] << 24) | (t[1] << 16) | (t[2] << 8 ) | (t[3]))>>>0
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112 | }
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113 |
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114 | function int2ip(i) {
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115 | return [i>>>24, (i>>>16)&255, (i>>>8)&255, i&255].join(".")
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116 | }
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117 |
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118 | // var re = /^((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])(?:\.(?=.)|$)){4}$/
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119 | function ipInNet(ip, cidr) {
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120 | var junks = cidr.split("/")
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121 | , bits = junks[1] || 8 * junks[0].split(".").length
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122 | , mask = bits < 31 ? (-1 << (32 - bits)) >>> 0 : ip2int(bits)
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123 | //, netInt = (ip2int(cidr) & mask) >>> 0
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124 | //, size = 1 << (32 - bits)
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125 | //, last = netInt + size - 1
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126 |
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127 | return (ip2int(ip) & mask) >>> 0 === (ip2int(junks[0]) & mask) >>> 0
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128 | }
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129 |
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130 | function Storage() {
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131 | this.data = {}
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132 | }
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133 |
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134 | Storage.prototype = {
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135 | get: function(key, next) {
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136 | var obj = this.data[key]
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137 | , err = obj ? null : "Item not found"
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138 | next(err, obj)
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139 | },
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140 | set: function(key, val, next) {
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141 | this.data[key] = val
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142 | next(null)
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143 | },
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144 | rename: function(key, newKey, next) {
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145 | this.data[newKey] = this.data[key]
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146 | delete this.data[key]
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147 | next(null)
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148 | }
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149 | }
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150 |
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151 |
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\ | No newline at end of file |