622 lines
18 KiB
JavaScript
622 lines
18 KiB
JavaScript
var fs = require('fs')
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var http = require('http')
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var qs = require('querystring')
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var path = require('path')
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var crypto = require('crypto')
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var pull = require('pull-stream')
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var paramap = require('pull-paramap')
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var sort = require('ssb-sort')
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var toPull = require('stream-to-pull-stream')
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var memo = require('asyncmemo')
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var lru = require('lrucache')
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var webresolve = require('ssb-web-resolver')
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var serveEmoji = require('emoji-server')()
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var refs = require('ssb-ref')
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var BoxStream = require('pull-box-stream')
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var h = require('hyperscript')
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var {
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MdRenderer,
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renderEmoji,
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formatMsgs,
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wrapPage,
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renderThread,
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renderAbout,
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renderShowAll,
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renderRssItem,
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wrapRss,
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} = require('./render')
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var appHash = hash([fs.readFileSync(__filename)])
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var urlIdRegex = /^(?:\/(([%&@]|%25|%26|%40)(?:[A-Za-z0-9\/+]|%2[Ff]|%2[Bb]){43}(?:=|%3[Dd])\.(?:sha256|ed25519))(?:\.([^?]*))?|(\/.*?))(?:\?(.*))?$/
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var zeros = new Buffer(24); zeros.fill(0)
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function hash(arr) {
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return arr.reduce(function (hash, item) {
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return hash.update(String(item))
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}, crypto.createHash('sha256')).digest('base64')
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}
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exports.name = 'viewer'
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exports.manifest = {}
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exports.version = require('./package').version
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exports.init = function (sbot, config) {
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var conf = config.viewer || {}
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var port = conf.port || 8807
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var host = conf.host || config.host || '::'
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var base = conf.base || '/'
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var defaultOpts = {
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base: base,
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msg_base: conf.msg_base || base,
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feed_base: conf.feed_base || base,
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blob_base: conf.blob_base || base,
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img_base: conf.img_base || base,
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emoji_base: conf.emoji_base || (base + 'emoji/'),
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requireOptIn: conf.require_opt_in == null ? true : conf.require_opt_in,
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}
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defaultOpts.marked = {
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gfm: true,
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mentions: true,
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tables: true,
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breaks: true,
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pedantic: false,
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sanitize: true,
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smartLists: true,
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smartypants: false,
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emoji: renderEmoji,
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renderer: new MdRenderer(defaultOpts)
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}
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var getMsg = memo({cache: lru(100)}, getMsgWithValue, sbot)
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var getAbout = memo({cache: lru(100)}, require('./lib/about'), sbot)
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var serveAcmeChallenge = require('ssb-acme-validator')(sbot)
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http.createServer(serve).listen(port, host, function () {
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if (/:/.test(host)) host = '[' + host + ']'
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console.log('[viewer] Listening on http://' + host + ':' + port)
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})
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function serve(req, res) {
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if (req.method !== 'GET' && req.method !== 'HEAD') {
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return respond(res, 405, 'Method must be GET or HEAD')
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}
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var m = urlIdRegex.exec(req.url)
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if (m[4] === '/robots.txt') return serveRobots(req, res, conf)
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if (req.url.startsWith('/static/')) return serveStatic(req, res, m[4])
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if (req.url.startsWith('/emoji/')) return serveEmoji(req, res, m[4])
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if (req.url.startsWith('/user-feed/')) return serveUserFeed(req, res, m[4])
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else if (req.url.startsWith('/channel/')) return serveChannel(req, res, m[4])
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else if (req.url.startsWith('/.well-known/acme-challenge')) return serveAcmeChallenge(req, res)
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else if (req.url.startsWith('/web/')) return serveWeb(req, res, m[4])
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if (m[2] && m[2].length === 3) {
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m[1] = decodeURIComponent(m[1])
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m[2] = m[1][0]
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}
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switch (m[2]) {
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case '%': return serveId(req, res, m[1], m[3], m[5])
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case '@': return serveFeed(req, res, m[1], m[3], m[5])
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case '&': return serveBlob(req, res, sbot, m[1], m[5])
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}
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if (m[4] === '/') return serveHome(req, res, m[5])
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return respond(res, 404, 'Not found')
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}
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function serveFeed(req, res, feedId, ext) {
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console.log('serving feed: ' + feedId)
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var showAll = req.url.endsWith('?showAll')
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getAbout(feedId, function (err, about) {
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if (err) return respond(res, 500, err.stack || err)
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function render() {
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switch (ext) {
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case 'rss':
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return pull(
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// formatMsgs(feedId, ext, defaultOpts)
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renderRssItem(defaultOpts), wrapRss(about.name, defaultOpts)
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)
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default:
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var publicWebHosting = about.publicWebHosting == null
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? !defaultOpts.requireOptIn : about.publicWebHosting
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var name = publicWebHosting ? about.name : feedId.substr(0, 10) + '…'
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return pull(
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renderAbout(defaultOpts, about,
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renderShowAll(showAll, req.url)), wrapPage(name)
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)
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}
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}
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pull(
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sbot.createUserStream({ id: feedId, reverse: true, limit: showAll ? -1 : (ext == 'rss' ? 25 : 10) }),
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pull.filter(function (data) {
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return 'object' === typeof data.value.content
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}),
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pull.collect(function (err, logs) {
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if (err) return respond(res, 500, err.stack || err)
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res.writeHead(200, {
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'Content-Type': ctype(ext)
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})
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pull(
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pull.values(logs),
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paramap(addAuthorAbout, 8),
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paramap(addBlog, 8),
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paramap(addFollowAbout, 8),
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paramap(addVoteMessage, 8),
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paramap(addGitLinks, 8),
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paramap(addGatheringAbout, 8),
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render(),
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toPull(res, function (err) {
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if (err) console.error('[viewer]', err)
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})
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)
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})
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)
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})
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}
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function serveWeb (req, res, url) {
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var self = this
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var id = decodeURIComponent(url.substr(1))
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var components = url.split('/')
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if (components[0] === '') components.shift()
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if (components[0] === 'web') components.shift()
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components[0] = decodeURIComponent(components[0])
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webresolve(sbot, components, function (err, data) {
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if (err) {
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return respond(res, 404, 'ERROR: ' + err)
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}
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return pull(
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pull.once(data),
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toPull(res, function (err) {
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if (err) console.error('[viewer]', err)
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})
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)
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})
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}
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function serveUserFeed(req, res, url) {
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var feedId = url.substring(url.lastIndexOf('user-feed/')+10, 100)
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console.log('serving user feed: ' + feedId)
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var following = []
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var channelSubscriptions = []
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getAbout(feedId, function (err, about) {
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pull(
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sbot.createUserStream({ id: feedId }),
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pull.filter((msg) => {
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return !msg.value ||
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msg.value.content.type == 'contact' ||
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(msg.value.content.type == 'channel' &&
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typeof msg.value.content.subscribed != 'undefined')
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}),
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pull.collect(function (err, msgs) {
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msgs.forEach((msg) => {
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if (msg.value.content.type == 'contact')
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{
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if (msg.value.content.following)
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following[msg.value.content.contact] = 1
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else
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delete following[msg.value.content.contact]
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}
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else // channel subscription
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{
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if (msg.value.content.subscribed)
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channelSubscriptions[msg.value.content.channel] = 1
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else
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delete channelSubscriptions[msg.value.content.channel]
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}
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})
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serveFeeds(req, res, following, channelSubscriptions, feedId,
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'user feed ' + (about ? about.name : ''))
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})
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)
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})
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}
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function serveFeeds(req, res, following, channelSubscriptions, feedId, name) {
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var feedOpts = Object.assign({}, defaultOpts, {
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renderPrivate: false,
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renderSubscribe: false,
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renderVote: false,
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renderTalenet: false,
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renderChess: false,
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renderFollow: false,
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renderPub: false,
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renderAbout: false
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})
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pull(
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sbot.createLogStream({ reverse: true, limit: 5000 }),
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pull.filter((msg) => {
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return !msg.value ||
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(msg.value.author in following ||
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msg.value.content.channel in channelSubscriptions)
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}),
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pull.take(150),
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pull.collect(function (err, logs) {
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if (err) return respond(res, 500, err.stack || err)
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res.writeHead(200, {
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'Content-Type': ctype('html')
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})
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pull(
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pull.values(logs),
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paramap(addAuthorAbout, 8),
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paramap(addBlog, 8),
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paramap(addFollowAbout, 8),
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paramap(addVoteMessage, 8),
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paramap(addGitLinks, 8),
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paramap(addGatheringAbout, 8),
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pull(renderThread(feedOpts), wrapPage(name)),
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toPull(res, function (err) {
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if (err) console.error('[viewer]', err)
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})
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)
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})
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)
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}
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function serveChannel(req, res, url) {
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var channelId = url.substring(url.lastIndexOf('channel/')+8, 100)
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console.log('serving channel: ' + channelId)
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var showAll = req.url.endsWith('?showAll')
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pull(
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sbot.query.read({ limit: showAll ? 300 : 10, reverse: true, query: [{$filter: { value: { content: { channel: channelId }}}}]}),
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pull.collect(function (err, logs) {
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if (err) return respond(res, 500, err.stack || err)
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res.writeHead(200, {
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'Content-Type': ctype('html')
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})
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pull(
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pull.values(logs),
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paramap(addAuthorAbout, 8),
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paramap(addBlog, 8),
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paramap(addVoteMessage, 8),
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paramap(addGatheringAbout, 8),
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pull(renderThread(defaultOpts, '', renderShowAll(showAll, req.url)),
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wrapPage('#' + channelId)),
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toPull(res, function (err) {
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if (err) console.error('[viewer]', err)
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})
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)
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})
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)
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}
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function serveId(req, res, id, ext, query) {
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var q = query ? qs.parse(query) : {}
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var includeRoot = !('noroot' in q)
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var base = q.base || conf.base
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var baseToken
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if (!base) {
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if (ext === 'js') base = baseToken = '__BASE_' + Math.random() + '_'
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else base = '/'
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}
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var opts = {
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base: base,
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base_token: baseToken,
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msg_base: q.msg_base || conf.msg_base || base,
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feed_base: q.feed_base || conf.feed_base || base,
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blob_base: q.blob_base || conf.blob_base || base,
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img_base: q.img_base || conf.img_base || base,
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emoji_base: q.emoji_base || conf.emoji_base || (base + 'emoji/'),
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requireOptIn: defaultOpts.requireOptIn,
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}
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opts.marked = {
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gfm: true,
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mentions: true,
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tables: true,
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breaks: true,
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pedantic: false,
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sanitize: true,
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smartLists: true,
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smartypants: false,
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emoji: renderEmoji,
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renderer: new MdRenderer(opts)
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}
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var format = formatMsgs(id, ext, opts)
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if (format === null) return respond(res, 415, 'Invalid format')
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function render (links) {
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var etag = hash(sort.heads(links).concat(appHash, ext, qs))
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if (req.headers['if-none-match'] === etag) return respond(res, 304)
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res.writeHead(200, {
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'Content-Type': ctype(ext),
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'etag': etag
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})
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pull(
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pull.values(sort(links)),
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paramap(addAuthorAbout, 8),
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paramap(addVoteMessage, 8),
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paramap(addBlog, 8),
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paramap(addGatheringAbout, 8),
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format,
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toPull(res, function (err) {
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if (err) console.error('[viewer]', err)
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})
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)
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}
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getMsgWithValue(sbot, id, function (err, root) {
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if (err) return respond(res, 500, err.stack || err)
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if('string' === typeof root.value.content)
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return render([root])
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pull(
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sbot.links({dest: id, values: true, rel: 'root' }),
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pull.unique('key'),
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pull.collect(function (err, links) {
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if (err) return respond(res, 500, err.stack || err)
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if(includeRoot)
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links.unshift(root)
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render(links)
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})
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)
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})
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}
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function addFollowAbout(msg, cb) {
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if (msg.value.content.contact)
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getAbout(msg.value.content.contact, function (err, about) {
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if (err) return cb(err)
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msg.value.content.contactAbout = about
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cb(null, msg)
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})
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else
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cb(null, msg)
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}
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function addVoteMessage(msg, cb) {
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if (msg.value.content.type == 'vote' && msg.value.content.vote && msg.value.content.vote.link[0] == '%')
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getMsg(msg.value.content.vote.link, function (err, linkedMsg) {
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var linkedC = linkedMsg && linkedMsg.value.content
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if (linkedMsg)
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msg.value.content.vote.linkedText =
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(typeof linkedC.contentWarning === 'string' ? '[CW: ' + linkedC.contentWarning + '] ' : '') +
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linkedC.text
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cb(null, msg)
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})
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else
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cb(null, msg)
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}
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function addBlog(msg, cb) {
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if (msg.value && msg.value.content.type == 'blog') {
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pull(
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sbot.blobs.get(msg.value.content.blog),
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pull.collect(function(err, blob) {
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msg.value.content.blogContent = blob
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cb(null, msg)
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})
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)
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} else
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cb(null, msg)
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}
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function addAuthorAbout(msg, cb) {
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getAbout(msg.value.author, function (err, about) {
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if (err) return cb(err)
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msg.author = about
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cb(null, msg)
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})
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}
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function addGatheringAbout(msg, cb) {
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if (msg.value && msg.value.content.type === 'gathering') {
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getAbout(msg.key, (err, about) => {
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if (err) { cb(err) }
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msg.value.content.about = about
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pull(
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sbot.backlinks.read({
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query: [{ $filter: {
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dest: msg.key,
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value: { content: { type: 'about' }},
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}}],
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index: 'DTA'
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}),
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// Only grab messages about attendance
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pull.filter(o => o.value.content.attendee !== undefined),
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// Filter "can't attend"-messages
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pull.filter(o => !o.value.content.attendee.remove),
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pull.unique(o => o.value.content.attendee.link),
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pull.collect((err, arr) => {
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if (err) { cb(err) }
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msg.value.content.numberAttending = arr.length
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cb(null, msg)
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})
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)
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})
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} else {
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cb(null, msg)
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}
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}
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function addGitLinks(msg, cb) {
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if (msg.value.content.type == 'git-update')
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getMsg(msg.value.content.repo, function (err, gitRepo) {
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if (gitRepo)
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msg.value.content.repoName = gitRepo.value.content.name
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cb(null, msg)
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})
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else if (msg.value.content.type == 'issue')
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getMsg(msg.value.content.project, function (err, gitRepo) {
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if (gitRepo)
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msg.value.content.repoName = gitRepo.value.content.name
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cb(null, msg)
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})
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else
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cb(null, msg)
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}
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}
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function serveBlob(req, res, sbot, id, query) {
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var q = query && qs.parse(query)
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var unbox = q && typeof q.unbox === 'string' && q.unbox.replace(/\s/g, '+')
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var etag = id + (unbox || '')
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if (req.headers['if-none-match'] === etag) return respond(res, 304)
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sbot.blobs.has(id, function (err, has) {
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if (err) {
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if (/^invalid/.test(err.message)) return respond(res, 400, err.message)
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else return respond(res, 500, err.message || err)
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}
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if (!has) return respond(res, 404, 'Not found')
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var unboxKey
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if (unbox) {
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try { unboxKey = new Buffer(unbox, 'base64') }
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catch(e) { return respond(res, 400, err.message) }
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if (unboxKey.length !== 32) return respond(res, 400, 'Bad blob key')
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}
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res.writeHead(200, {
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'Cache-Control': 'public, max-age=315360000, immutable',
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'etag': etag
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})
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pull(
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sbot.blobs.get(id),
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unboxKey ? BoxStream.createUnboxStream(unboxKey, zeros) : null,
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toPull(res, function (err) {
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if (err) console.error('[viewer]', err)
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})
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)
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})
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}
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function getMsgWithValue(sbot, id, cb) {
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sbot.get(id, function (err, value) {
|
|
if (err) return cb(err)
|
|
cb(null, {key: id, value: value})
|
|
})
|
|
}
|
|
|
|
function respond(res, status, message) {
|
|
res.writeHead(status)
|
|
res.end(message)
|
|
}
|
|
|
|
function ctype(name) {
|
|
switch (name && /[^.\/]*$/.exec(name)[0] || 'html') {
|
|
case 'html': return 'text/html'
|
|
case 'js': return 'text/javascript'
|
|
case 'css': return 'text/css'
|
|
case 'json': return 'application/json'
|
|
case 'rss': return 'text/xml'
|
|
}
|
|
}
|
|
|
|
function ifModified(req, lastMod) {
|
|
var ifModSince = req.headers['if-modified-since']
|
|
if (!ifModSince) return false
|
|
var d = new Date(ifModSince)
|
|
return d && Math.floor(d/1000) >= Math.floor(lastMod/1000)
|
|
}
|
|
|
|
function serveStatic(req, res, file) {
|
|
serveFile(req, res, path.join(__dirname, 'static', file))
|
|
}
|
|
|
|
function serveFile(req, res, file) {
|
|
fs.stat(file, function (err, stat) {
|
|
if (err && err.code === 'ENOENT') return respond(res, 404, 'Not found')
|
|
if (err) return respond(res, 500, err.stack || err)
|
|
if (!stat.isFile()) return respond(res, 403, 'May only load files')
|
|
if (ifModified(req, stat.mtime)) return respond(res, 304, 'Not modified')
|
|
res.writeHead(200, {
|
|
'Content-Type': ctype(file),
|
|
'Content-Length': stat.size,
|
|
'Last-Modified': stat.mtime.toGMTString()
|
|
})
|
|
fs.createReadStream(file).pipe(res)
|
|
})
|
|
}
|
|
|
|
function asChannelLink(id) {
|
|
var channel = refs.normalizeChannel(id)
|
|
if (channel) return '#' + channel
|
|
}
|
|
|
|
function asLink(id) {
|
|
if (!id || typeof id !== 'string') return null
|
|
id = id.trim()
|
|
if (id[0] === '#') return asChannelLink(id)
|
|
if (refs.isLink(id)) return id
|
|
try {
|
|
id = decodeURIComponent(id)
|
|
} catch(e) {
|
|
return null
|
|
}
|
|
if (id[0] === '#') return asChannelLink(id)
|
|
if (refs.isLink(id)) return id
|
|
}
|
|
|
|
function serveHome(req, res, query, conf) {
|
|
var q = query ? qs.parse(query) : {}
|
|
var id = asLink(q.id)
|
|
if (id) {
|
|
res.writeHead(303, {
|
|
Location: '/' + (
|
|
id[0] === '#' ? 'channel/' + id.substr(1) :
|
|
refs.isMsgId(id) ? encodeURIComponent(id) : id)
|
|
})
|
|
return res.end()
|
|
}
|
|
res.writeHead(200, {
|
|
'Content-Type': 'text/html'
|
|
})
|
|
pull(
|
|
pull.once(h('form', {method: 'get', action: ''},
|
|
h('input', {name: 'id', placeholder: 'id', size: 60, value: q.id || ''}), ' ',
|
|
h('input', {type: 'submit', value: 'Go'})
|
|
).outerHTML),
|
|
wrapPage('ssb-viewer'),
|
|
toPull(res, function (err) {
|
|
if (err) console.error('[viewer]', err)
|
|
})
|
|
)
|
|
}
|
|
|
|
function serveRobots(req, res, conf) {
|
|
var disallow = conf.disallowRobots == null ? true : conf.disallowRobots
|
|
res.end('User-agent: *\n'
|
|
+ (disallow ? 'Disallow: /\n' : ''))
|
|
}
|
|
|
|
function prepend(fn, arg) {
|
|
return function (read) {
|
|
return function (abort, cb) {
|
|
if (fn && !abort) {
|
|
var _fn = fn
|
|
fn = null
|
|
return _fn(arg, function (err, value) {
|
|
if (err) return read(err, function (err) {
|
|
cb(err || true)
|
|
})
|
|
cb(null, value)
|
|
})
|
|
}
|
|
read(abort, cb)
|
|
}
|
|
}
|
|
}
|