all files / ssb-ref/ index.js

75.71% Statements 134/177
56.72% Branches 76/134
85.19% Functions 23/27
84.52% Lines 131/155
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var isCanonicalBase64 = require('canonical-base64')
var isDomain = require('is-valid-domain')
var Querystring = require('querystring')
var ip = require('ip')
var protocolRegex = /^(net|wss?|onion|rtc)$/
var parseLinkRegex = /^((@|%|&)[A-Za-z0-9\/+]{43}=\.[\w\d]+)(\?(.+))?$/
var linkRegex = exports.linkRegex = /^(@|%|&)[A-Za-z0-9\/+]{43}=\.[\w\d]+$/
 
var feedIdRegex = isCanonicalBase64('@', '\.(?:sha256|ed25519)', 32)
var blobIdRegex = isCanonicalBase64('&', '\.sha256', 32)
var msgIdRegex = isCanonicalBase64('%', '\.sha256', 32)
 
var multiServerAddressRegex = /^\w+\:.+~shs\:/
var extractRegex = /([@%&][A-Za-z0-9\/+]{43}=\.[\w\d]+)/
 
function isIP (s) {
  return ip.isV4Format(s) || ip.isV6Format(s)
}
 
var isInteger = Number.isInteger
var DEFAULT_PORT = 8008
 
function isString(s) {
  return 'string' === typeof s
}
 
var isHost = function (addr) {
  return ('string' === typeof addr && isIP(addr)) || isDomain(addr) || addr === 'localhost'
}
 
var isPort = function (p) {
  return isInteger(p) && p <= 65536
}
 
function isObject (o) {
  return o && 'object' === typeof o && !Array.isArray(o)
}
 
var isLink = exports.isLink =
  function (data) {
    return isString(data) && parseLinkRegex.test(data)
  }
 
var isFeedId = exports.isFeed = exports.isFeedId =
  function (data) {
    return isString(data) && feedIdRegex.test(data)
  }
 
var isMsgId = exports.isMsg = exports.isMsgId =
  function (data) {
    return isString(data) && msgIdRegex.test(data)
  }
 
var isBlobId = exports.isBlob = exports.isBlobId =
  function (data) {
    return isString(data) && blobIdRegex.test(data)
  }
 
exports.isBlobLink = function (s) {
  return s[0] === '&' && isLink(s)
}
 
exports.isMsgLink = function (s) {
  return s[0] === '%' && isLink(s)
}
 
 
var normalizeChannel = exports.normalizeChannel =
  function (data) {
    if (typeof data === 'string') {
      data = data.toLowerCase().replace(/\s|,|\.|\?|!|<|>|\(|\)|\[|\]|"|#/g, '')
      if (data.length > 0 && data.length < 30) {
        return data
      }
    }
  }
 
var parseMultiServerAddress = function (data) {
  Iif(!isString(data)) return false
  if(!multiServerAddressRegex.test(data)) return false
  data = data.split('~').map(function (e) {
    return e.split(':')
  })
 
  Iif(data.length != 2) return false
  Iif(!(data[0].length >= 3)) return false
  Iif(!(data[1].length == 2 || data[1].length == 3)) return false
  Iif(!protocolRegex.test(data[0][0])) return false
  Iif(data[1][0] !== 'shs') return false
 
  var port = +data[0][data[0].length - 1] //last item is port, handle ipv6
  var host = data[0].slice(1, data[0].length - 1).join(':') //ipv6
  var key = '@'+data[1][1]+'.ed25519'
  var seed = data[1][2]
 
  Iif(!(isHost(host) && isPort(+port) && isFeedId(key))) return false
  var addr = {
    host: host,
    port: port,
    key: key,
  }
  Iif(seed)
    addr.seed = seed
 
  return addr
}
 
var isAddress = exports.isAddress = function (data) {
  var host, port, id
  Iif(isObject(data)) {
    id = data.key
    host = data.host
    port = data.port
  }
  else Iif(!isString(data)) return false
  else if(parseMultiServerAddress(data)) return true
  else {
    var parts = data.split(':')
    var id = parts.pop(), port = parts.pop(), host = parts.join(':')
  }
  return (
    isFeedId(id) && isPort(+port)
    && isHost(host)
  )
}
 
var parseAddress = exports.parseAddress = function (e) {
  Eif(isString(e)) {
    if(~e.indexOf('~'))
      return parseMultiServerAddress(e)
    var parts = e.split(':')
    var id = parts.pop(), port = parts.pop(), host = parts.join(':')
    var e = {
      host: host,
      port: +(port || DEFAULT_PORT),
      key: id
    }
    return e
  }
  return e
}
 
var toAddress = exports.toAddress = function (e) {
  e = exports.parseAddress(e)
  e.port = e.port || DEFAULT_PORT
  e.host = e.host || 'localhost'
  return e
}
 
 
var legacyInviteRegex = /^[A-Za-z0-9\/+]{43}=$/
var legacyInviteFixerRegex = /#.*$/
var isLegacyInvite = exports.isLegacyInvite =
  function (data) {
    Iif(!isString(data)) return false
    data = data.replace(legacyInviteFixerRegex, '')
    var parts = data.split('~')
    return parts.length == 2 && isAddress(parts[0]) && legacyInviteRegex.test(parts[1])
  }
 
var isMultiServerInvite = exports.isMultiServerInvite =
  function (data) {
    Iif(!isString(data)) return false
    return !!parseMultiServerInvite(data)
  }
 
var isInvite = exports.isInvite =
  function (data) {
    Iif(!isString(data)) return false
    return isLegacyInvite(data) || isMultiServerInvite(data)
  }
 
exports.parseLink = function parseBlob (ref) {
  var match = parseLinkRegex.exec(ref)
  Eif (match && match[1]) {
    if (match[3]) {
      return {link: match[1], query: Querystring.parse(match[4])}
    } else {
      return {link: match[1]}
    }
  }
}
 
function parseLegacyInvite (invite) {
  var redirect = invite.split('#')
  invite = redirect.shift()
  var parts = invite.split('~')
  var addr = toAddress(parts[0])//.split(':')
  //convert legacy code to multiserver invite code.
  var protocol = 'net:'
  Iif (addr.host.endsWith(".onion"))
    protocol = 'onion:'
  var remote = protocol+addr.host+':'+addr.port+'~shs:'+addr.key.slice(1, -8)
  invite = remote+':'+parts[1]
  return {
    invite: remote + ':' + parts[1],
    key: addr.key,
    redirect: null,
    remote: remote,
    redirect: redirect.length ? '#' + redirect.join('#') : null
  }
}
 
function parseMultiServerInvite (invite) {
 
  var redirect = invite.split('#')
  Iif(!redirect.length) return null
 
  invite = redirect.shift()
 
  var parts = invite.split('~')
  .map(function (e) { return e.split(':') })
 
  Iif(parts.length !== 2) return null
  Iif(!protocolRegex.test(parts[0][0])) return null
  Iif(parts[1][0] !== 'shs') return null
  Iif(parts[1].length !== 3) return null
  var p2 = invite.split(':')
  p2.pop()
 
  return {
    invite: invite,
    remote: p2.join(':'),
    key: '@'+parts[1][1]+'.ed25519',
    redirect: redirect.length ? '#' + redirect.join('#') : null
  }
}
 
exports.parseLegacyInvite = parseLegacyInvite
exports.parseMultiServerInvite = parseMultiServerInvite
 
exports.parseInvite = function (invite) {
  return (
    isLegacyInvite(invite)
  ? parseLegacyInvite(invite)
  : isMultiServerInvite(invite)
  ? parseMultiServerInvite(invite)
  : null
  )
}
 
exports.type =
  function (id) {
    if(!isString(id)) return false
    var c = id.charAt(0)
    if (c == '@' && isFeedId(id))
      return 'feed'
    else if (c == '%' && isMsgId(id))
      return 'msg'
    else if (c == '&' && isBlobId(id))
      return 'blob'
    else if(isAddress(id)) return 'address'
    else if(isInvite(id)) return 'invite'
    else
    return false
  }
 
exports.extract =
  function (data) {
    Iif (!isString(data))
      return false
 
    var _data = data
 
    var res = extractRegex.exec(_data)
    if (res) {
      return res && res[0]
    } else {
      try { _data = decodeURIComponent(data) }
      catch (e) {} // this may fail if it's not encoded, so don't worry if it does
      _data = _data.replace(/&amp;/g, '&')
  
      var res = extractRegex.exec(_data)
      return res && res[0]
    }
  }