Files: ba6d7cd3abf79e5283853b32cbebf218dae8c981 / index.js
15836 bytesRaw
1 | var fs = require('fs') |
2 | var http = require('http') |
3 | var qs = require('querystring') |
4 | var path = require('path') |
5 | var crypto = require('crypto') |
6 | var pull = require('pull-stream') |
7 | var paramap = require('pull-paramap') |
8 | var sort = require('ssb-sort') |
9 | var toPull = require('stream-to-pull-stream') |
10 | var memo = require('asyncmemo') |
11 | var lru = require('lrucache') |
12 | var webresolve = require('ssb-web-resolver') |
13 | var serveEmoji = require('emoji-server')() |
14 | var { |
15 | MdRenderer, |
16 | renderEmoji, |
17 | formatMsgs, |
18 | wrapPage, |
19 | renderThread, |
20 | renderAbout, |
21 | renderShowAll, |
22 | renderRssItem, |
23 | wrapRss, |
24 | } = require('./render'); |
25 | |
26 | var appHash = hash([fs.readFileSync(__filename)]) |
27 | |
28 | var urlIdRegex = /^(?:\/(([%&@]|%25|%26|%40)(?:[A-Za-z0-9\/+]|%2[Ff]|%2[Bb]){43}(?:=|%3[Dd])\.(?:sha256|ed25519))(?:\.([^?]*))?|(\/.*?))(?:\?(.*))?$/ |
29 | |
30 | function hash(arr) { |
31 | return arr.reduce(function (hash, item) { |
32 | return hash.update(String(item)) |
33 | }, crypto.createHash('sha256')).digest('base64') |
34 | } |
35 | |
36 | exports.name = 'viewer' |
37 | exports.manifest = {} |
38 | exports.version = require('./package').version |
39 | |
40 | exports.init = function (sbot, config) { |
41 | var conf = config.viewer || {} |
42 | var port = conf.port || 8807 |
43 | var host = conf.host || config.host || '::' |
44 | |
45 | var base = conf.base || '/' |
46 | var defaultOpts = { |
47 | base: base, |
48 | msg_base: conf.msg_base || base, |
49 | feed_base: conf.feed_base || base, |
50 | blob_base: conf.blob_base || base, |
51 | img_base: conf.img_base || base, |
52 | emoji_base: conf.emoji_base || (base + 'emoji/'), |
53 | } |
54 | |
55 | defaultOpts.marked = { |
56 | gfm: true, |
57 | mentions: true, |
58 | tables: true, |
59 | breaks: true, |
60 | pedantic: false, |
61 | sanitize: true, |
62 | smartLists: true, |
63 | smartypants: false, |
64 | emoji: renderEmoji, |
65 | renderer: new MdRenderer(defaultOpts) |
66 | } |
67 | |
68 | var getMsg = memo({cache: lru(100)}, getMsgWithValue, sbot) |
69 | var getAbout = memo({cache: lru(100)}, require('./lib/about'), sbot) |
70 | var serveAcmeChallenge = require('ssb-acme-validator')(sbot) |
71 | |
72 | http.createServer(serve).listen(port, host, function () { |
73 | console.log('[viewer] Listening on http://' + host + ':' + port) |
74 | }) |
75 | |
76 | function serve(req, res) { |
77 | if (req.method !== 'GET' && req.method !== 'HEAD') { |
78 | return respond(res, 405, 'Method must be GET or HEAD') |
79 | } |
80 | |
81 | var m = urlIdRegex.exec(req.url) |
82 | |
83 | if (req.url.startsWith('/user-feed/')) return serveUserFeed(req, res, m[4]) |
84 | else if (req.url.startsWith('/channel/')) return serveChannel(req, res, m[4]) |
85 | else if (req.url.startsWith('/.well-known/acme-challenge')) return serveAcmeChallenge(req, res) |
86 | else if (req.url.startsWith('/web/')) return serveWeb(req, res, m[4]) |
87 | |
88 | if (m[2] && m[2].length === 3) { |
89 | m[1] = decodeURIComponent(m[1]) |
90 | m[2] = m[1][0] |
91 | } |
92 | switch (m[2]) { |
93 | case '%': return serveId(req, res, m[1], m[3], m[5]) |
94 | case '@': return serveFeed(req, res, m[1], m[3], m[5]) |
95 | case '&': return serveBlob(req, res, sbot, m[1]) |
96 | default: return servePath(req, res, m[4], conf) |
97 | } |
98 | } |
99 | |
100 | function serveFeed(req, res, feedId, ext) { |
101 | console.log("serving feed: " + feedId) |
102 | |
103 | var showAll = req.url.endsWith("?showAll"); |
104 | |
105 | getAbout(feedId, function (err, about) { |
106 | if (err) return respond(res, 500, err.stack || err) |
107 | |
108 | function render() { |
109 | switch (ext) { |
110 | case 'rss': |
111 | return pull( |
112 | // formatMsgs(feedId, ext, defaultOpts) |
113 | renderRssItem(defaultOpts), wrapRss(about.name, defaultOpts) |
114 | ); |
115 | default: |
116 | var name = about.publicWebHosting === false ? feedId.substr(0, 10) + '…' : about.name |
117 | return pull( |
118 | renderAbout(defaultOpts, about, |
119 | renderShowAll(showAll, req.url)), wrapPage(name) |
120 | ); |
121 | } |
122 | } |
123 | |
124 | pull( |
125 | sbot.createUserStream({ id: feedId, reverse: true, limit: showAll ? -1 : (ext == 'rss' ? 25 : 10) }), |
126 | pull.filter(function (data) { |
127 | return 'object' === typeof data.value.content |
128 | }), |
129 | pull.collect(function (err, logs) { |
130 | if (err) return respond(res, 500, err.stack || err) |
131 | res.writeHead(200, { |
132 | 'Content-Type': ctype(ext) |
133 | }) |
134 | pull( |
135 | pull.values(logs), |
136 | paramap(addAuthorAbout, 8), |
137 | paramap(addBlog, 8), |
138 | paramap(addFollowAbout, 8), |
139 | paramap(addVoteMessage, 8), |
140 | paramap(addGitLinks, 8), |
141 | paramap(addGatheringAbout, 8), |
142 | render(), |
143 | toPull(res, function (err) { |
144 | if (err) console.error('[viewer]', err) |
145 | }) |
146 | ) |
147 | }) |
148 | ) |
149 | }) |
150 | } |
151 | |
152 | function serveWeb (req, res, url) { |
153 | var self = this |
154 | var id = decodeURIComponent(url.substr(1)) |
155 | |
156 | var components = url.split('/') |
157 | if (components[0] === '') components.shift() |
158 | if (components[0] === 'web') components.shift() |
159 | components[0] = decodeURIComponent(components[0]) |
160 | |
161 | webresolve(sbot, components, function (err, data) { |
162 | if (err) { |
163 | return respond(res, 404, 'ERROR: ' + err) |
164 | } |
165 | return pull( |
166 | pull.once(data), |
167 | toPull(res, function (err) { |
168 | if (err) console.error('[viewer]', err) |
169 | }) |
170 | ) |
171 | }) |
172 | } |
173 | |
174 | function serveUserFeed(req, res, url) { |
175 | var feedId = url.substring(url.lastIndexOf('user-feed/')+10, 100) |
176 | console.log("serving user feed: " + feedId) |
177 | |
178 | var following = [] |
179 | var channelSubscriptions = [] |
180 | |
181 | getAbout(feedId, function (err, about) { |
182 | pull( |
183 | sbot.createUserStream({ id: feedId }), |
184 | pull.filter((msg) => { |
185 | return !msg.value || |
186 | msg.value.content.type == 'contact' || |
187 | (msg.value.content.type == 'channel' && |
188 | typeof msg.value.content.subscribed != 'undefined') |
189 | }), |
190 | pull.collect(function (err, msgs) { |
191 | msgs.forEach((msg) => { |
192 | if (msg.value.content.type == 'contact') |
193 | { |
194 | if (msg.value.content.following) |
195 | following[msg.value.content.contact] = 1 |
196 | else |
197 | delete following[msg.value.content.contact] |
198 | } |
199 | else // channel subscription |
200 | { |
201 | if (msg.value.content.subscribed) |
202 | channelSubscriptions[msg.value.content.channel] = 1 |
203 | else |
204 | delete channelSubscriptions[msg.value.content.channel] |
205 | } |
206 | }) |
207 | |
208 | serveFeeds(req, res, following, channelSubscriptions, feedId, |
209 | 'user feed ' + (about ? about.name : "")) |
210 | }) |
211 | ) |
212 | }) |
213 | } |
214 | |
215 | function serveFeeds(req, res, following, channelSubscriptions, feedId, name) { |
216 | var feedOpts = Object.assign({}, defaultOpts, { |
217 | renderPrivate: false, |
218 | renderSubscribe: false, |
219 | renderVote: false, |
220 | renderTalenet: false, |
221 | renderChess: false, |
222 | renderFollow: false, |
223 | renderPub: false, |
224 | renderAbout: false |
225 | }) |
226 | |
227 | pull( |
228 | sbot.createLogStream({ reverse: true, limit: 5000 }), |
229 | pull.filter((msg) => { |
230 | return !msg.value || |
231 | (msg.value.author in following || |
232 | msg.value.content.channel in channelSubscriptions) |
233 | }), |
234 | pull.take(150), |
235 | pull.collect(function (err, logs) { |
236 | if (err) return respond(res, 500, err.stack || err) |
237 | res.writeHead(200, { |
238 | 'Content-Type': ctype("html") |
239 | }) |
240 | pull( |
241 | pull.values(logs), |
242 | paramap(addAuthorAbout, 8), |
243 | paramap(addBlog, 8), |
244 | paramap(addFollowAbout, 8), |
245 | paramap(addVoteMessage, 8), |
246 | paramap(addGitLinks, 8), |
247 | paramap(addGatheringAbout, 8), |
248 | pull(renderThread(feedOpts), wrapPage(name)), |
249 | toPull(res, function (err) { |
250 | if (err) console.error('[viewer]', err) |
251 | }) |
252 | ) |
253 | }) |
254 | ) |
255 | } |
256 | |
257 | function serveChannel(req, res, url) { |
258 | var channelId = url.substring(url.lastIndexOf('channel/')+8, 100) |
259 | console.log("serving channel: " + channelId) |
260 | |
261 | var showAll = req.url.endsWith("?showAll") |
262 | |
263 | pull( |
264 | sbot.query.read({ limit: showAll ? 300 : 10, reverse: true, query: [{$filter: { value: { content: { channel: channelId }}}}]}), |
265 | pull.collect(function (err, logs) { |
266 | if (err) return respond(res, 500, err.stack || err) |
267 | res.writeHead(200, { |
268 | 'Content-Type': ctype("html") |
269 | }) |
270 | pull( |
271 | pull.values(logs), |
272 | paramap(addAuthorAbout, 8), |
273 | paramap(addBlog, 8), |
274 | paramap(addVoteMessage, 8), |
275 | paramap(addGatheringAbout, 8), |
276 | pull(renderThread(defaultOpts, '', renderShowAll(showAll, req.url)), |
277 | wrapPage('#' + channelId)), |
278 | toPull(res, function (err) { |
279 | if (err) console.error('[viewer]', err) |
280 | }) |
281 | ) |
282 | }) |
283 | ) |
284 | } |
285 | |
286 | function serveId(req, res, id, ext, query) { |
287 | var q = query ? qs.parse(query) : {} |
288 | var includeRoot = !('noroot' in q) |
289 | var base = q.base || conf.base |
290 | var baseToken |
291 | if (!base) { |
292 | if (ext === 'js') base = baseToken = '__BASE_' + Math.random() + '_' |
293 | else base = '/' |
294 | } |
295 | var opts = { |
296 | base: base, |
297 | base_token: baseToken, |
298 | msg_base: q.msg_base || conf.msg_base || base, |
299 | feed_base: q.feed_base || conf.feed_base || base, |
300 | blob_base: q.blob_base || conf.blob_base || base, |
301 | img_base: q.img_base || conf.img_base || base, |
302 | emoji_base: q.emoji_base || conf.emoji_base || (base + 'emoji/'), |
303 | } |
304 | opts.marked = { |
305 | gfm: true, |
306 | mentions: true, |
307 | tables: true, |
308 | breaks: true, |
309 | pedantic: false, |
310 | sanitize: true, |
311 | smartLists: true, |
312 | smartypants: false, |
313 | emoji: renderEmoji, |
314 | renderer: new MdRenderer(opts) |
315 | } |
316 | |
317 | var format = formatMsgs(id, ext, opts) |
318 | if (format === null) return respond(res, 415, 'Invalid format') |
319 | |
320 | function render (links) { |
321 | var etag = hash(sort.heads(links).concat(appHash, ext, qs)) |
322 | if (req.headers['if-none-match'] === etag) return respond(res, 304) |
323 | res.writeHead(200, { |
324 | 'Content-Type': ctype(ext), |
325 | 'etag': etag |
326 | }) |
327 | pull( |
328 | pull.values(sort(links)), |
329 | paramap(addAuthorAbout, 8), |
330 | paramap(addBlog, 8), |
331 | paramap(addGatheringAbout, 8), |
332 | format, |
333 | toPull(res, function (err) { |
334 | if (err) console.error('[viewer]', err) |
335 | }) |
336 | ) |
337 | } |
338 | |
339 | getMsgWithValue(sbot, id, function (err, root) { |
340 | if (err) return respond(res, 500, err.stack || err) |
341 | if('string' === typeof root.value.content) |
342 | return render([root]) |
343 | |
344 | pull( |
345 | sbot.links({dest: id, values: true, rel: 'root' }), |
346 | pull.unique('key'), |
347 | pull.collect(function (err, links) { |
348 | if (err) return respond(res, 500, err.stack || err) |
349 | if(includeRoot) |
350 | links.unshift(root) |
351 | render(links) |
352 | }) |
353 | ) |
354 | }) |
355 | } |
356 | |
357 | function addFollowAbout(msg, cb) { |
358 | if (msg.value.content.contact) |
359 | getAbout(msg.value.content.contact, function (err, about) { |
360 | if (err) return cb(err) |
361 | msg.value.content.contactAbout = about |
362 | cb(null, msg) |
363 | }) |
364 | else |
365 | cb(null, msg) |
366 | } |
367 | |
368 | function addVoteMessage(msg, cb) { |
369 | if (msg.value.content.type == 'vote' && msg.value.content.vote && msg.value.content.vote.link[0] == '%') |
370 | getMsg(msg.value.content.vote.link, function (err, linkedMsg) { |
371 | if (linkedMsg) |
372 | msg.value.content.vote.linkedText = linkedMsg.value.content.text |
373 | cb(null, msg) |
374 | }) |
375 | else |
376 | cb(null, msg) |
377 | } |
378 | |
379 | function addBlog(msg, cb) { |
380 | if (msg.value && msg.value.content.type == "blog") { |
381 | pull( |
382 | sbot.blobs.get(msg.value.content.blog), |
383 | pull.collect(function(err, blob) { |
384 | msg.value.content.blogContent = blob |
385 | cb(null, msg) |
386 | }) |
387 | ) |
388 | } else |
389 | cb(null, msg) |
390 | } |
391 | |
392 | function addAuthorAbout(msg, cb) { |
393 | getAbout(msg.value.author, function (err, about) { |
394 | if (err) return cb(err) |
395 | msg.author = about |
396 | cb(null, msg) |
397 | }) |
398 | } |
399 | |
400 | function addGatheringAbout(msg, cb) { |
401 | if (msg.value && msg.value.content.type === 'gathering') { |
402 | getAbout(msg.key, (err, about) => { |
403 | if (err) { cb(err) } |
404 | |
405 | msg.value.content.about = about |
406 | |
407 | pull( |
408 | sbot.backlinks.read({ |
409 | query: [{ $filter: { |
410 | dest: msg.key, |
411 | value: { content: { type: 'about' }}, |
412 | }}], |
413 | index: 'DTA' |
414 | }), |
415 | // Only grab messages about attendance |
416 | pull.filter(o => o.value.content.attendee !== undefined), |
417 | // Filter "can't attend"-messages |
418 | pull.filter(o => !o.value.content.attendee.remove), |
419 | pull.unique(o => o.value.content.attendee.link), |
420 | pull.collect((err, arr) => { |
421 | if (err) { cb(err) } |
422 | |
423 | msg.value.content.numberAttending = arr.length |
424 | |
425 | cb(null, msg) |
426 | }) |
427 | ) |
428 | }) |
429 | } else { |
430 | cb(null, msg) |
431 | } |
432 | } |
433 | |
434 | function addGitLinks(msg, cb) { |
435 | if (msg.value.content.type == 'git-update') |
436 | getMsg(msg.value.content.repo, function (err, gitRepo) { |
437 | if (gitRepo) |
438 | msg.value.content.repoName = gitRepo.value.content.name |
439 | cb(null, msg) |
440 | }) |
441 | else if (msg.value.content.type == 'issue') |
442 | getMsg(msg.value.content.project, function (err, gitRepo) { |
443 | if (gitRepo) |
444 | msg.value.content.repoName = gitRepo.value.content.name |
445 | cb(null, msg) |
446 | }) |
447 | else |
448 | cb(null, msg) |
449 | } |
450 | } |
451 | |
452 | function serveBlob(req, res, sbot, id) { |
453 | if (req.headers['if-none-match'] === id) return respond(res, 304) |
454 | sbot.blobs.has(id, function (err, has) { |
455 | if (err) { |
456 | if (/^invalid/.test(err.message)) return respond(res, 400, err.message) |
457 | else return respond(res, 500, err.message || err) |
458 | } |
459 | if (!has) return respond(res, 404, 'Not found') |
460 | res.writeHead(200, { |
461 | 'Cache-Control': 'public, max-age=315360000', |
462 | 'etag': id |
463 | }) |
464 | pull( |
465 | sbot.blobs.get(id), |
466 | toPull(res, function (err) { |
467 | if (err) console.error('[viewer]', err) |
468 | }) |
469 | ) |
470 | }) |
471 | } |
472 | |
473 | function getMsgWithValue(sbot, id, cb) { |
474 | sbot.get(id, function (err, value) { |
475 | if (err) return cb(err) |
476 | cb(null, {key: id, value: value}) |
477 | }) |
478 | } |
479 | |
480 | function respond(res, status, message) { |
481 | res.writeHead(status) |
482 | res.end(message) |
483 | } |
484 | |
485 | function ctype(name) { |
486 | switch (name && /[^.\/]*$/.exec(name)[0] || 'html') { |
487 | case 'html': return 'text/html' |
488 | case 'js': return 'text/javascript' |
489 | case 'css': return 'text/css' |
490 | case 'json': return 'application/json' |
491 | case 'rss': return 'text/xml' |
492 | } |
493 | } |
494 | |
495 | function servePath(req, res, url, conf) { |
496 | switch (url) { |
497 | case '/robots.txt': return serveRobots(req, res, conf) |
498 | } |
499 | var m = /^(\/?[^\/]*)(\/.*)?$/.exec(url) |
500 | switch (m[1]) { |
501 | case '/static': return serveStatic(req, res, m[2]) |
502 | case '/emoji': return serveEmoji(req, res, m[2]) |
503 | } |
504 | return respond(res, 404, 'Not found') |
505 | } |
506 | |
507 | function ifModified(req, lastMod) { |
508 | var ifModSince = req.headers['if-modified-since'] |
509 | if (!ifModSince) return false |
510 | var d = new Date(ifModSince) |
511 | return d && Math.floor(d/1000) >= Math.floor(lastMod/1000) |
512 | } |
513 | |
514 | function serveStatic(req, res, file) { |
515 | serveFile(req, res, path.join(__dirname, 'static', file)) |
516 | } |
517 | |
518 | function serveFile(req, res, file) { |
519 | fs.stat(file, function (err, stat) { |
520 | if (err && err.code === 'ENOENT') return respond(res, 404, 'Not found') |
521 | if (err) return respond(res, 500, err.stack || err) |
522 | if (!stat.isFile()) return respond(res, 403, 'May only load files') |
523 | if (ifModified(req, stat.mtime)) return respond(res, 304, 'Not modified') |
524 | res.writeHead(200, { |
525 | 'Content-Type': ctype(file), |
526 | 'Content-Length': stat.size, |
527 | 'Last-Modified': stat.mtime.toGMTString() |
528 | }) |
529 | fs.createReadStream(file).pipe(res) |
530 | }) |
531 | } |
532 | |
533 | function serveRobots(req, res, conf) { |
534 | res.end('User-agent: *' |
535 | + (conf.disallowRobots ? '\nDisallow: /' : '')) |
536 | } |
537 | |
538 | function prepend(fn, arg) { |
539 | return function (read) { |
540 | return function (abort, cb) { |
541 | if (fn && !abort) { |
542 | var _fn = fn |
543 | fn = null |
544 | return _fn(arg, function (err, value) { |
545 | if (err) return read(err, function (err) { |
546 | cb(err || true) |
547 | }) |
548 | cb(null, value) |
549 | }) |
550 | } |
551 | read(abort, cb) |
552 | } |
553 | } |
554 | } |
555 |
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