first commit

app_vue/node_modules/fast-uri/lib/utils.js

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+'use strict'
+
+const { HEX } = require('./scopedChars')
+
+const IPV4_REG = /^(?:(?:25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|\d)\.){3}(?:25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|\d)$/u
+
+function normalizeIPv4 (host) {
+  if (findToken(host, '.') < 3) { return { host, isIPV4: false } }
+  const matches = host.match(IPV4_REG) || []
+  const [address] = matches
+  if (address) {
+    return { host: stripLeadingZeros(address, '.'), isIPV4: true }
+  } else {
+    return { host, isIPV4: false }
+  }
+}
+
+/**
+ * @param {string[]} input
+ * @param {boolean} [keepZero=false]
+ * @returns {string|undefined}
+ */
+function stringArrayToHexStripped (input, keepZero = false) {
+  let acc = ''
+  let strip = true
+  for (const c of input) {
+    if (HEX[c] === undefined) return undefined
+    if (c !== '0' && strip === true) strip = false
+    if (!strip) acc += c
+  }
+  if (keepZero && acc.length === 0) acc = '0'
+  return acc
+}
+
+function getIPV6 (input) {
+  let tokenCount = 0
+  const output = { error: false, address: '', zone: '' }
+  const address = []
+  const buffer = []
+  let isZone = false
+  let endipv6Encountered = false
+  let endIpv6 = false
+
+  function consume () {
+    if (buffer.length) {
+      if (isZone === false) {
+        const hex = stringArrayToHexStripped(buffer)
+        if (hex !== undefined) {
+          address.push(hex)
+        } else {
+          output.error = true
+          return false
+        }
+      }
+      buffer.length = 0
+    }
+    return true
+  }
+
+  for (let i = 0; i < input.length; i++) {
+    const cursor = input[i]
+    if (cursor === '[' || cursor === ']') { continue }
+    if (cursor === ':') {
+      if (endipv6Encountered === true) {
+        endIpv6 = true
+      }
+      if (!consume()) { break }
+      tokenCount++
+      address.push(':')
+      if (tokenCount > 7) {
+        // not valid
+        output.error = true
+        break
+      }
+      if (i - 1 >= 0 && input[i - 1] === ':') {
+        endipv6Encountered = true
+      }
+      continue
+    } else if (cursor === '%') {
+      if (!consume()) { break }
+      // switch to zone detection
+      isZone = true
+    } else {
+      buffer.push(cursor)
+      continue
+    }
+  }
+  if (buffer.length) {
+    if (isZone) {
+      output.zone = buffer.join('')
+    } else if (endIpv6) {
+      address.push(buffer.join(''))
+    } else {
+      address.push(stringArrayToHexStripped(buffer))
+    }
+  }
+  output.address = address.join('')
+  return output
+}
+
+function normalizeIPv6 (host) {
+  if (findToken(host, ':') < 2) { return { host, isIPV6: false } }
+  const ipv6 = getIPV6(host)
+
+  if (!ipv6.error) {
+    let newHost = ipv6.address
+    let escapedHost = ipv6.address
+    if (ipv6.zone) {
+      newHost += '%' + ipv6.zone
+      escapedHost += '%25' + ipv6.zone
+    }
+    return { host: newHost, escapedHost, isIPV6: true }
+  } else {
+    return { host, isIPV6: false }
+  }
+}
+
+function stripLeadingZeros (str, token) {
+  let out = ''
+  let skip = true
+  const l = str.length
+  for (let i = 0; i < l; i++) {
+    const c = str[i]
+    if (c === '0' && skip) {
+      if ((i + 1 <= l && str[i + 1] === token) || i + 1 === l) {
+        out += c
+        skip = false
+      }
+    } else {
+      if (c === token) {
+        skip = true
+      } else {
+        skip = false
+      }
+      out += c
+    }
+  }
+  return out
+}
+
+function findToken (str, token) {
+  let ind = 0
+  for (let i = 0; i < str.length; i++) {
+    if (str[i] === token) ind++
+  }
+  return ind
+}
+
+const RDS1 = /^\.\.?\//u
+const RDS2 = /^\/\.(?:\/|$)/u
+const RDS3 = /^\/\.\.(?:\/|$)/u
+const RDS5 = /^\/?(?:.|\n)*?(?=\/|$)/u
+
+function removeDotSegments (input) {
+  const output = []
+
+  while (input.length) {
+    if (input.match(RDS1)) {
+      input = input.replace(RDS1, '')
+    } else if (input.match(RDS2)) {
+      input = input.replace(RDS2, '/')
+    } else if (input.match(RDS3)) {
+      input = input.replace(RDS3, '/')
+      output.pop()
+    } else if (input === '.' || input === '..') {
+      input = ''
+    } else {
+      const im = input.match(RDS5)
+      if (im) {
+        const s = im[0]
+        input = input.slice(s.length)
+        output.push(s)
+      } else {
+        throw new Error('Unexpected dot segment condition')
+      }
+    }
+  }
+  return output.join('')
+}
+
+function normalizeComponentEncoding (components, esc) {
+  const func = esc !== true ? escape : unescape
+  if (components.scheme !== undefined) {
+    components.scheme = func(components.scheme)
+  }
+  if (components.userinfo !== undefined) {
+    components.userinfo = func(components.userinfo)
+  }
+  if (components.host !== undefined) {
+    components.host = func(components.host)
+  }
+  if (components.path !== undefined) {
+    components.path = func(components.path)
+  }
+  if (components.query !== undefined) {
+    components.query = func(components.query)
+  }
+  if (components.fragment !== undefined) {
+    components.fragment = func(components.fragment)
+  }
+  return components
+}
+
+function recomposeAuthority (components) {
+  const uriTokens = []
+
+  if (components.userinfo !== undefined) {
+    uriTokens.push(components.userinfo)
+    uriTokens.push('@')
+  }
+
+  if (components.host !== undefined) {
+    let host = unescape(components.host)
+    const ipV4res = normalizeIPv4(host)
+
+    if (ipV4res.isIPV4) {
+      host = ipV4res.host
+    } else {
+      const ipV6res = normalizeIPv6(ipV4res.host)
+      if (ipV6res.isIPV6 === true) {
+        host = `[${ipV6res.escapedHost}]`
+      } else {
+        host = components.host
+      }
+    }
+    uriTokens.push(host)
+  }
+
+  if (typeof components.port === 'number' || typeof components.port === 'string') {
+    uriTokens.push(':')
+    uriTokens.push(String(components.port))
+  }
+
+  return uriTokens.length ? uriTokens.join('') : undefined
+};
+
+module.exports = {
+  recomposeAuthority,
+  normalizeComponentEncoding,
+  removeDotSegments,
+  normalizeIPv4,
+  normalizeIPv6,
+  stringArrayToHexStripped
+}