1 | 'use strict'
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2 |
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3 | const UUID_REG = /^[\da-f]{8}\b-[\da-f]{4}\b-[\da-f]{4}\b-[\da-f]{4}\b-[\da-f]{12}$/iu
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4 | const URN_REG = /([\da-z][\d\-a-z]{0,31}):((?:[\w!$'()*+,\-.:;=@]|%[\da-f]{2})+)/iu
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5 |
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6 | function isSecure (wsComponents) {
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7 | return typeof wsComponents.secure === 'boolean' ? wsComponents.secure : String(wsComponents.scheme).toLowerCase() === 'wss'
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8 | }
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9 |
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10 | function httpParse (components) {
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11 | if (!components.host) {
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12 | components.error = components.error || 'HTTP URIs must have a host.'
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13 | }
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14 |
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15 | return components
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16 | }
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17 |
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18 | function httpSerialize (components) {
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19 | const secure = String(components.scheme).toLowerCase() === 'https'
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20 |
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21 | // normalize the default port
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22 | if (components.port === (secure ? 443 : 80) || components.port === '') {
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23 | components.port = undefined
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24 | }
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25 |
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26 | // normalize the empty path
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27 | if (!components.path) {
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28 | components.path = '/'
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29 | }
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30 |
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31 | // NOTE: We do not parse query strings for HTTP URIs
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32 | // as WWW Form Url Encoded query strings are part of the HTML4+ spec,
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33 | // and not the HTTP spec.
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34 |
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35 | return components
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36 | }
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37 |
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38 | function wsParse (wsComponents) {
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39 | // indicate if the secure flag is set
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40 | wsComponents.secure = isSecure(wsComponents)
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41 |
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42 | // construct resouce name
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43 | wsComponents.resourceName = (wsComponents.path || '/') + (wsComponents.query ? '?' + wsComponents.query : '')
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44 | wsComponents.path = undefined
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45 | wsComponents.query = undefined
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46 |
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47 | return wsComponents
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48 | }
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49 |
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50 | function wsSerialize (wsComponents) {
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51 | // normalize the default port
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52 | if (wsComponents.port === (isSecure(wsComponents) ? 443 : 80) || wsComponents.port === '') {
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53 | wsComponents.port = undefined
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54 | }
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55 |
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56 | // ensure scheme matches secure flag
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57 | if (typeof wsComponents.secure === 'boolean') {
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58 | wsComponents.scheme = (wsComponents.secure ? 'wss' : 'ws')
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59 | wsComponents.secure = undefined
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60 | }
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61 |
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62 | // reconstruct path from resource name
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63 | if (wsComponents.resourceName) {
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64 | const [path, query] = wsComponents.resourceName.split('?')
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65 | wsComponents.path = (path && path !== '/' ? path : undefined)
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66 | wsComponents.query = query
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67 | wsComponents.resourceName = undefined
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68 | }
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69 |
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70 | // forbid fragment component
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71 | wsComponents.fragment = undefined
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72 |
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73 | return wsComponents
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74 | }
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75 |
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76 | function urnParse (urnComponents, options) {
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77 | if (!urnComponents.path) {
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78 | urnComponents.error = 'URN can not be parsed'
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79 | return urnComponents
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80 | }
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81 | const matches = urnComponents.path.match(URN_REG)
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82 | if (matches) {
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83 | const scheme = options.scheme || urnComponents.scheme || 'urn'
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84 | urnComponents.nid = matches[1].toLowerCase()
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85 | urnComponents.nss = matches[2]
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86 | const urnScheme = `${scheme}:${options.nid || urnComponents.nid}`
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87 | const schemeHandler = SCHEMES[urnScheme]
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88 | urnComponents.path = undefined
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89 |
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90 | if (schemeHandler) {
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91 | urnComponents = schemeHandler.parse(urnComponents, options)
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92 | }
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93 | } else {
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94 | urnComponents.error = urnComponents.error || 'URN can not be parsed.'
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95 | }
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96 |
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97 | return urnComponents
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98 | }
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99 |
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100 | function urnSerialize (urnComponents, options) {
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101 | const scheme = options.scheme || urnComponents.scheme || 'urn'
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102 | const nid = urnComponents.nid.toLowerCase()
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103 | const urnScheme = `${scheme}:${options.nid || nid}`
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104 | const schemeHandler = SCHEMES[urnScheme]
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105 |
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106 | if (schemeHandler) {
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107 | urnComponents = schemeHandler.serialize(urnComponents, options)
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108 | }
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109 |
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110 | const uriComponents = urnComponents
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111 | const nss = urnComponents.nss
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112 | uriComponents.path = `${nid || options.nid}:${nss}`
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113 |
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114 | options.skipEscape = true
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115 | return uriComponents
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116 | }
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117 |
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118 | function urnuuidParse (urnComponents, options) {
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119 | const uuidComponents = urnComponents
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120 | uuidComponents.uuid = uuidComponents.nss
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121 | uuidComponents.nss = undefined
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122 |
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123 | if (!options.tolerant && (!uuidComponents.uuid || !UUID_REG.test(uuidComponents.uuid))) {
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124 | uuidComponents.error = uuidComponents.error || 'UUID is not valid.'
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125 | }
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126 |
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127 | return uuidComponents
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128 | }
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129 |
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130 | function urnuuidSerialize (uuidComponents) {
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131 | const urnComponents = uuidComponents
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132 | // normalize UUID
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133 | urnComponents.nss = (uuidComponents.uuid || '').toLowerCase()
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134 | return urnComponents
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135 | }
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136 |
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137 | const http = {
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138 | scheme: 'http',
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139 | domainHost: true,
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140 | parse: httpParse,
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141 | serialize: httpSerialize
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142 | }
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143 |
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144 | const https = {
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145 | scheme: 'https',
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146 | domainHost: http.domainHost,
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147 | parse: httpParse,
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148 | serialize: httpSerialize
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149 | }
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150 |
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151 | const ws = {
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152 | scheme: 'ws',
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153 | domainHost: true,
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154 | parse: wsParse,
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155 | serialize: wsSerialize
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156 | }
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157 |
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158 | const wss = {
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159 | scheme: 'wss',
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160 | domainHost: ws.domainHost,
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161 | parse: ws.parse,
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162 | serialize: ws.serialize
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163 | }
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164 |
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165 | const urn = {
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166 | scheme: 'urn',
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167 | parse: urnParse,
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168 | serialize: urnSerialize,
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169 | skipNormalize: true
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170 | }
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171 |
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172 | const urnuuid = {
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173 | scheme: 'urn:uuid',
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174 | parse: urnuuidParse,
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175 | serialize: urnuuidSerialize,
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176 | skipNormalize: true
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177 | }
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178 |
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179 | const SCHEMES = {
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180 | http,
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181 | https,
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182 | ws,
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183 | wss,
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184 | urn,
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185 | 'urn:uuid': urnuuid
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186 | }
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187 |
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188 | module.exports = SCHEMES
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