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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(/&/g, '&')
var res = extractRegex.exec(_data)
return res && res[0]
}
}
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