Files: 857dc63ce5bae471cf7123b6ec6ace0896677b64 / index.js
14640 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 | return pull( |
117 | renderAbout(defaultOpts, about, |
118 | renderShowAll(showAll, req.url)), wrapPage(about.name) |
119 | ); |
120 | } |
121 | } |
122 | |
123 | pull( |
124 | sbot.createUserStream({ id: feedId, reverse: true, limit: showAll ? -1 : (ext == 'rss' ? 25 : 10) }), |
125 | pull.filter(function (data) { |
126 | return 'object' === typeof data.value.content |
127 | }), |
128 | pull.collect(function (err, logs) { |
129 | if (err) return respond(res, 500, err.stack || err) |
130 | res.writeHead(200, { |
131 | 'Content-Type': ctype(ext) |
132 | }) |
133 | pull( |
134 | pull.values(logs), |
135 | paramap(addAuthorAbout, 8), |
136 | paramap(addBlog, 8), |
137 | paramap(addFollowAbout, 8), |
138 | paramap(addVoteMessage, 8), |
139 | paramap(addGitLinks, 8), |
140 | render(), |
141 | toPull(res, function (err) { |
142 | if (err) console.error('[viewer]', err) |
143 | }) |
144 | ) |
145 | }) |
146 | ) |
147 | }) |
148 | } |
149 | |
150 | function serveWeb (req, res, url) { |
151 | var self = this |
152 | var id = decodeURIComponent(url.substr(1)) |
153 | |
154 | var components = url.split('/') |
155 | if (components[0] === '') components.shift() |
156 | if (components[0] === 'web') components.shift() |
157 | components[0] = decodeURIComponent(components[0]) |
158 | |
159 | webresolve(sbot, components, function (err, data) { |
160 | if (err) { |
161 | return respond(res, 404, 'ERROR: ' + err) |
162 | } |
163 | return pull( |
164 | pull.once(data), |
165 | toPull(res, function (err) { |
166 | if (err) console.error('[viewer]', err) |
167 | }) |
168 | ) |
169 | }) |
170 | } |
171 | |
172 | function serveUserFeed(req, res, url) { |
173 | var feedId = url.substring(url.lastIndexOf('user-feed/')+10, 100) |
174 | console.log("serving user feed: " + feedId) |
175 | |
176 | var following = [] |
177 | var channelSubscriptions = [] |
178 | |
179 | getAbout(feedId, function (err, about) { |
180 | pull( |
181 | sbot.createUserStream({ id: feedId }), |
182 | pull.filter((msg) => { |
183 | return !msg.value || |
184 | msg.value.content.type == 'contact' || |
185 | (msg.value.content.type == 'channel' && |
186 | typeof msg.value.content.subscribed != 'undefined') |
187 | }), |
188 | pull.collect(function (err, msgs) { |
189 | msgs.forEach((msg) => { |
190 | if (msg.value.content.type == 'contact') |
191 | { |
192 | if (msg.value.content.following) |
193 | following[msg.value.content.contact] = 1 |
194 | else |
195 | delete following[msg.value.content.contact] |
196 | } |
197 | else // channel subscription |
198 | { |
199 | if (msg.value.content.subscribed) |
200 | channelSubscriptions[msg.value.content.channel] = 1 |
201 | else |
202 | delete channelSubscriptions[msg.value.content.channel] |
203 | } |
204 | }) |
205 | |
206 | serveFeeds(req, res, following, channelSubscriptions, feedId, |
207 | 'user feed ' + (about ? about.name : "")) |
208 | }) |
209 | ) |
210 | }) |
211 | } |
212 | |
213 | function serveFeeds(req, res, following, channelSubscriptions, feedId, name) { |
214 | var feedOpts = Object.assign({}, defaultOpts, { |
215 | renderPrivate: false, |
216 | renderSubscribe: false, |
217 | renderVote: false, |
218 | renderTalenet: false, |
219 | renderChess: false, |
220 | renderFollow: false, |
221 | renderPub: false, |
222 | renderAbout: false |
223 | }) |
224 | |
225 | pull( |
226 | sbot.createLogStream({ reverse: true, limit: 5000 }), |
227 | pull.filter((msg) => { |
228 | return !msg.value || |
229 | (msg.value.author in following || |
230 | msg.value.content.channel in channelSubscriptions) |
231 | }), |
232 | pull.take(150), |
233 | pull.collect(function (err, logs) { |
234 | if (err) return respond(res, 500, err.stack || err) |
235 | res.writeHead(200, { |
236 | 'Content-Type': ctype("html") |
237 | }) |
238 | pull( |
239 | pull.values(logs), |
240 | paramap(addAuthorAbout, 8), |
241 | paramap(addBlog, 8), |
242 | paramap(addFollowAbout, 8), |
243 | paramap(addVoteMessage, 8), |
244 | paramap(addGitLinks, 8), |
245 | pull(renderThread(feedOpts), wrapPage(name)), |
246 | toPull(res, function (err) { |
247 | if (err) console.error('[viewer]', err) |
248 | }) |
249 | ) |
250 | }) |
251 | ) |
252 | } |
253 | |
254 | function serveChannel(req, res, url) { |
255 | var channelId = url.substring(url.lastIndexOf('channel/')+8, 100) |
256 | console.log("serving channel: " + channelId) |
257 | |
258 | var showAll = req.url.endsWith("?showAll") |
259 | |
260 | pull( |
261 | sbot.query.read({ limit: showAll ? 300 : 10, reverse: true, query: [{$filter: { value: { content: { channel: channelId }}}}]}), |
262 | pull.collect(function (err, logs) { |
263 | if (err) return respond(res, 500, err.stack || err) |
264 | res.writeHead(200, { |
265 | 'Content-Type': ctype("html") |
266 | }) |
267 | pull( |
268 | pull.values(logs), |
269 | paramap(addAuthorAbout, 8), |
270 | paramap(addBlog, 8), |
271 | paramap(addVoteMessage, 8), |
272 | pull(renderThread(defaultOpts, '', renderShowAll(showAll, req.url)), |
273 | wrapPage('#' + channelId)), |
274 | toPull(res, function (err) { |
275 | if (err) console.error('[viewer]', err) |
276 | }) |
277 | ) |
278 | }) |
279 | ) |
280 | } |
281 | |
282 | function serveId(req, res, id, ext, query) { |
283 | var q = query ? qs.parse(query) : {} |
284 | var includeRoot = !('noroot' in q) |
285 | var base = q.base || conf.base |
286 | var baseToken |
287 | if (!base) { |
288 | if (ext === 'js') base = baseToken = '__BASE_' + Math.random() + '_' |
289 | else base = '/' |
290 | } |
291 | var opts = { |
292 | base: base, |
293 | base_token: baseToken, |
294 | msg_base: q.msg_base || conf.msg_base || base, |
295 | feed_base: q.feed_base || conf.feed_base || base, |
296 | blob_base: q.blob_base || conf.blob_base || base, |
297 | img_base: q.img_base || conf.img_base || base, |
298 | emoji_base: q.emoji_base || conf.emoji_base || (base + 'emoji/'), |
299 | } |
300 | opts.marked = { |
301 | gfm: true, |
302 | mentions: true, |
303 | tables: true, |
304 | breaks: true, |
305 | pedantic: false, |
306 | sanitize: true, |
307 | smartLists: true, |
308 | smartypants: false, |
309 | emoji: renderEmoji, |
310 | renderer: new MdRenderer(opts) |
311 | } |
312 | |
313 | var format = formatMsgs(id, ext, opts) |
314 | if (format === null) return respond(res, 415, 'Invalid format') |
315 | |
316 | function render (links) { |
317 | var etag = hash(sort.heads(links).concat(appHash, ext, qs)) |
318 | if (req.headers['if-none-match'] === etag) return respond(res, 304) |
319 | res.writeHead(200, { |
320 | 'Content-Type': ctype(ext), |
321 | 'etag': etag |
322 | }) |
323 | pull( |
324 | pull.values(sort(links)), |
325 | paramap(addAuthorAbout, 8), |
326 | paramap(addBlog, 8), |
327 | format, |
328 | toPull(res, function (err) { |
329 | if (err) console.error('[viewer]', err) |
330 | }) |
331 | ) |
332 | } |
333 | |
334 | getMsgWithValue(sbot, id, function (err, root) { |
335 | if (err) return respond(res, 500, err.stack || err) |
336 | if('string' === typeof root.value.content) |
337 | return render([root]) |
338 | |
339 | pull( |
340 | sbot.links({dest: id, values: true, rel: 'root' }), |
341 | pull.unique('key'), |
342 | pull.collect(function (err, links) { |
343 | if (err) return respond(res, 500, err.stack || err) |
344 | if(includeRoot) |
345 | links.unshift(root) |
346 | render(links) |
347 | }) |
348 | ) |
349 | }) |
350 | } |
351 | |
352 | function addFollowAbout(msg, cb) { |
353 | if (msg.value.content.contact) |
354 | getAbout(msg.value.content.contact, function (err, about) { |
355 | if (err) return cb(err) |
356 | msg.value.content.contactAbout = about |
357 | cb(null, msg) |
358 | }) |
359 | else |
360 | cb(null, msg) |
361 | } |
362 | |
363 | function addVoteMessage(msg, cb) { |
364 | if (msg.value.content.type == 'vote' && msg.value.content.vote && msg.value.content.vote.link[0] == '%') |
365 | getMsg(msg.value.content.vote.link, function (err, linkedMsg) { |
366 | if (linkedMsg) |
367 | msg.value.content.vote.linkedText = linkedMsg.value.content.text |
368 | cb(null, msg) |
369 | }) |
370 | else |
371 | cb(null, msg) |
372 | } |
373 | |
374 | function addBlog(msg, cb) { |
375 | if (msg.value && msg.value.content.type == "blog") { |
376 | pull( |
377 | sbot.blobs.get(msg.value.content.blog), |
378 | pull.collect(function(err, blob) { |
379 | msg.value.content.blogContent = blob |
380 | cb(null, msg) |
381 | }) |
382 | ) |
383 | } else |
384 | cb(null, msg) |
385 | } |
386 | |
387 | function addAuthorAbout(msg, cb) { |
388 | getAbout(msg.value.author, function (err, about) { |
389 | if (err) return cb(err) |
390 | msg.author = about |
391 | cb(null, msg) |
392 | }) |
393 | } |
394 | |
395 | function addGitLinks(msg, cb) { |
396 | if (msg.value.content.type == 'git-update') |
397 | getMsg(msg.value.content.repo, function (err, gitRepo) { |
398 | if (gitRepo) |
399 | msg.value.content.repoName = gitRepo.value.content.name |
400 | cb(null, msg) |
401 | }) |
402 | else if (msg.value.content.type == 'issue') |
403 | getMsg(msg.value.content.project, function (err, gitRepo) { |
404 | if (gitRepo) |
405 | msg.value.content.repoName = gitRepo.value.content.name |
406 | cb(null, msg) |
407 | }) |
408 | else |
409 | cb(null, msg) |
410 | } |
411 | } |
412 | |
413 | function serveBlob(req, res, sbot, id) { |
414 | if (req.headers['if-none-match'] === id) return respond(res, 304) |
415 | sbot.blobs.has(id, function (err, has) { |
416 | if (err) { |
417 | if (/^invalid/.test(err.message)) return respond(res, 400, err.message) |
418 | else return respond(res, 500, err.message || err) |
419 | } |
420 | if (!has) return respond(res, 404, 'Not found') |
421 | res.writeHead(200, { |
422 | 'Cache-Control': 'public, max-age=315360000', |
423 | 'etag': id |
424 | }) |
425 | pull( |
426 | sbot.blobs.get(id), |
427 | toPull(res, function (err) { |
428 | if (err) console.error('[viewer]', err) |
429 | }) |
430 | ) |
431 | }) |
432 | } |
433 | |
434 | function getMsgWithValue(sbot, id, cb) { |
435 | sbot.get(id, function (err, value) { |
436 | if (err) return cb(err) |
437 | cb(null, {key: id, value: value}) |
438 | }) |
439 | } |
440 | |
441 | function respond(res, status, message) { |
442 | res.writeHead(status) |
443 | res.end(message) |
444 | } |
445 | |
446 | function ctype(name) { |
447 | switch (name && /[^.\/]*$/.exec(name)[0] || 'html') { |
448 | case 'html': return 'text/html' |
449 | case 'js': return 'text/javascript' |
450 | case 'css': return 'text/css' |
451 | case 'json': return 'application/json' |
452 | case 'rss': return 'text/xml' |
453 | } |
454 | } |
455 | |
456 | function servePath(req, res, url, conf) { |
457 | switch (url) { |
458 | case '/robots.txt': return serveRobots(req, res, conf) |
459 | } |
460 | var m = /^(\/?[^\/]*)(\/.*)?$/.exec(url) |
461 | switch (m[1]) { |
462 | case '/static': return serveStatic(req, res, m[2]) |
463 | case '/emoji': return serveEmoji(req, res, m[2]) |
464 | } |
465 | return respond(res, 404, 'Not found') |
466 | } |
467 | |
468 | function ifModified(req, lastMod) { |
469 | var ifModSince = req.headers['if-modified-since'] |
470 | if (!ifModSince) return false |
471 | var d = new Date(ifModSince) |
472 | return d && Math.floor(d/1000) >= Math.floor(lastMod/1000) |
473 | } |
474 | |
475 | function serveStatic(req, res, file) { |
476 | serveFile(req, res, path.join(__dirname, 'static', file)) |
477 | } |
478 | |
479 | function serveFile(req, res, file) { |
480 | fs.stat(file, function (err, stat) { |
481 | if (err && err.code === 'ENOENT') return respond(res, 404, 'Not found') |
482 | if (err) return respond(res, 500, err.stack || err) |
483 | if (!stat.isFile()) return respond(res, 403, 'May only load files') |
484 | if (ifModified(req, stat.mtime)) return respond(res, 304, 'Not modified') |
485 | res.writeHead(200, { |
486 | 'Content-Type': ctype(file), |
487 | 'Content-Length': stat.size, |
488 | 'Last-Modified': stat.mtime.toGMTString() |
489 | }) |
490 | fs.createReadStream(file).pipe(res) |
491 | }) |
492 | } |
493 | |
494 | function serveRobots(req, res, conf) { |
495 | res.end('User-agent: *' |
496 | + (conf.disallowRobots ? '\nDisallow: /' : '')) |
497 | } |
498 | |
499 | function prepend(fn, arg) { |
500 | return function (read) { |
501 | return function (abort, cb) { |
502 | if (fn && !abort) { |
503 | var _fn = fn |
504 | fn = null |
505 | return _fn(arg, function (err, value) { |
506 | if (err) return read(err, function (err) { |
507 | cb(err || true) |
508 | }) |
509 | cb(null, value) |
510 | }) |
511 | } |
512 | read(abort, cb) |
513 | } |
514 | } |
515 | } |
516 |
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