Files: 1eb1be440d662e83405d844c8ae88402c56c92a6 / index.js
13918 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]) |
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(addFollowAbout, 8), |
137 | paramap(addVoteMessage, 8), |
138 | paramap(addGitLinks, 8), |
139 | render(), |
140 | toPull(res, function (err) { |
141 | if (err) console.error('[viewer]', err) |
142 | }) |
143 | ) |
144 | }) |
145 | ) |
146 | }) |
147 | } |
148 | |
149 | function serveWeb (req, res, url) { |
150 | var self = this |
151 | var id = decodeURIComponent(url.substr(1)) |
152 | |
153 | var components = url.split('/') |
154 | if (components[0] === '') components.shift() |
155 | if (components[0] === 'web') components.shift() |
156 | components[0] = decodeURIComponent(components[0]) |
157 | |
158 | webresolve(sbot, components, function (err, data) { |
159 | if (err) { |
160 | return respond(res, 404, 'ERROR: ' + err) |
161 | } |
162 | return pull( |
163 | pull.once(data), |
164 | toPull(res, function (err) { |
165 | if (err) console.error('[viewer]', err) |
166 | }) |
167 | ) |
168 | }) |
169 | } |
170 | |
171 | function serveUserFeed(req, res, url) { |
172 | var feedId = url.substring(url.lastIndexOf('user-feed/')+10, 100) |
173 | console.log("serving user feed: " + feedId) |
174 | |
175 | var following = [] |
176 | var channelSubscriptions = [] |
177 | |
178 | getAbout(feedId, function (err, about) { |
179 | pull( |
180 | sbot.createUserStream({ id: feedId }), |
181 | pull.filter((msg) => { |
182 | return !msg.value || |
183 | msg.value.content.type == 'contact' || |
184 | (msg.value.content.type == 'channel' && |
185 | typeof msg.value.content.subscribed != 'undefined') |
186 | }), |
187 | pull.collect(function (err, msgs) { |
188 | msgs.forEach((msg) => { |
189 | if (msg.value.content.type == 'contact') |
190 | { |
191 | if (msg.value.content.following) |
192 | following[msg.value.content.contact] = 1 |
193 | else |
194 | delete following[msg.value.content.contact] |
195 | } |
196 | else // channel subscription |
197 | { |
198 | if (msg.value.content.subscribed) |
199 | channelSubscriptions[msg.value.content.channel] = 1 |
200 | else |
201 | delete channelSubscriptions[msg.value.content.channel] |
202 | } |
203 | }) |
204 | |
205 | serveFeeds(req, res, following, channelSubscriptions, feedId, |
206 | 'user feed ' + (about ? about.name : "")) |
207 | }) |
208 | ) |
209 | }) |
210 | } |
211 | |
212 | function serveFeeds(req, res, following, channelSubscriptions, feedId, name) { |
213 | var feedOpts = Object.assign({}, defaultOpts, { |
214 | renderPrivate: false, |
215 | renderSubscribe: false, |
216 | renderAbout: false |
217 | }) |
218 | |
219 | pull( |
220 | sbot.createLogStream({ reverse: true, limit: 5000 }), |
221 | pull.filter((msg) => { |
222 | return !msg.value || |
223 | (msg.value.author in following || |
224 | msg.value.content.channel in channelSubscriptions) |
225 | }), |
226 | pull.take(150), |
227 | pull.collect(function (err, logs) { |
228 | if (err) return respond(res, 500, err.stack || err) |
229 | res.writeHead(200, { |
230 | 'Content-Type': ctype("html") |
231 | }) |
232 | pull( |
233 | pull.values(logs), |
234 | paramap(addAuthorAbout, 8), |
235 | paramap(addFollowAbout, 8), |
236 | paramap(addVoteMessage, 8), |
237 | paramap(addGitLinks, 8), |
238 | pull(renderThread(feedOpts), wrapPage(name)), |
239 | toPull(res, function (err) { |
240 | if (err) console.error('[viewer]', err) |
241 | }) |
242 | ) |
243 | }) |
244 | ) |
245 | } |
246 | |
247 | function serveChannel(req, res, url) { |
248 | var channelId = url.substring(url.lastIndexOf('channel/')+8, 100) |
249 | console.log("serving channel: " + channelId) |
250 | |
251 | var showAll = req.url.endsWith("?showAll") |
252 | |
253 | pull( |
254 | sbot.query.read({ limit: showAll ? 300 : 10, reverse: true, query: [{$filter: { value: { content: { channel: channelId }}}}]}), |
255 | pull.collect(function (err, logs) { |
256 | if (err) return respond(res, 500, err.stack || err) |
257 | res.writeHead(200, { |
258 | 'Content-Type': ctype("html") |
259 | }) |
260 | pull( |
261 | pull.values(logs), |
262 | paramap(addAuthorAbout, 8), |
263 | paramap(addVoteMessage, 8), |
264 | pull(renderThread(defaultOpts, '', |
265 | renderShowAll(showAll, req.url)), |
266 | wrapPage('#' + channelId)), |
267 | toPull(res, function (err) { |
268 | if (err) console.error('[viewer]', err) |
269 | }) |
270 | ) |
271 | }) |
272 | ) |
273 | } |
274 | |
275 | function serveId(req, res, id, ext, query) { |
276 | var q = query ? qs.parse(query) : {} |
277 | var includeRoot = !('noroot' in q) |
278 | var base = q.base || conf.base |
279 | var baseToken |
280 | if (!base) { |
281 | if (ext === 'js') base = baseToken = '__BASE_' + Math.random() + '_' |
282 | else base = '/' |
283 | } |
284 | var opts = { |
285 | base: base, |
286 | base_token: baseToken, |
287 | msg_base: q.msg_base || conf.msg_base || base, |
288 | feed_base: q.feed_base || conf.feed_base || base, |
289 | blob_base: q.blob_base || conf.blob_base || base, |
290 | img_base: q.img_base || conf.img_base || base, |
291 | emoji_base: q.emoji_base || conf.emoji_base || (base + 'emoji/'), |
292 | } |
293 | opts.marked = { |
294 | gfm: true, |
295 | mentions: true, |
296 | tables: true, |
297 | breaks: true, |
298 | pedantic: false, |
299 | sanitize: true, |
300 | smartLists: true, |
301 | smartypants: false, |
302 | emoji: renderEmoji, |
303 | renderer: new MdRenderer(opts) |
304 | } |
305 | |
306 | var format = formatMsgs(id, ext, opts) |
307 | if (format === null) return respond(res, 415, 'Invalid format') |
308 | |
309 | function render (links) { |
310 | var etag = hash(sort.heads(links).concat(appHash, ext, qs)) |
311 | if (req.headers['if-none-match'] === etag) return respond(res, 304) |
312 | res.writeHead(200, { |
313 | 'Content-Type': ctype(ext), |
314 | 'etag': etag |
315 | }) |
316 | pull( |
317 | pull.values(sort(links)), |
318 | paramap(addAuthorAbout, 8), |
319 | format, |
320 | toPull(res, function (err) { |
321 | if (err) console.error('[viewer]', err) |
322 | }) |
323 | ) |
324 | } |
325 | |
326 | getMsgWithValue(sbot, id, function (err, root) { |
327 | if (err) return respond(res, 500, err.stack || err) |
328 | if('string' === typeof root.value.content) |
329 | return render([root]) |
330 | |
331 | pull( |
332 | sbot.links({dest: id, values: true, rel: 'root' }), |
333 | pull.unique('key'), |
334 | pull.collect(function (err, links) { |
335 | if (err) return respond(res, 500, err.stack || err) |
336 | if(includeRoot) |
337 | links.unshift(root) |
338 | render(links) |
339 | }) |
340 | ) |
341 | }) |
342 | } |
343 | |
344 | function addFollowAbout(msg, cb) { |
345 | if (msg.value.content.contact) |
346 | getAbout(msg.value.content.contact, function (err, about) { |
347 | if (err) return cb(err) |
348 | msg.value.content.contactAbout = about |
349 | cb(null, msg) |
350 | }) |
351 | else |
352 | cb(null, msg) |
353 | } |
354 | |
355 | function addVoteMessage(msg, cb) { |
356 | if (msg.value.content.type == 'vote' && msg.value.content.vote.link[0] == '%') |
357 | getMsg(msg.value.content.vote.link, function (err, linkedMsg) { |
358 | if (linkedMsg) |
359 | msg.value.content.vote.linkedText = linkedMsg.value.content.text |
360 | cb(null, msg) |
361 | }) |
362 | else |
363 | cb(null, msg) |
364 | } |
365 | |
366 | function addAuthorAbout(msg, cb) { |
367 | getAbout(msg.value.author, function (err, about) { |
368 | if (err) return cb(err) |
369 | msg.author = about |
370 | cb(null, msg) |
371 | }) |
372 | } |
373 | |
374 | function addGitLinks(msg, cb) { |
375 | if (msg.value.content.type == 'git-update') |
376 | getMsg(msg.value.content.repo, function (err, gitRepo) { |
377 | if (gitRepo) |
378 | msg.value.content.repoName = gitRepo.value.content.name |
379 | cb(null, msg) |
380 | }) |
381 | else if (msg.value.content.type == 'issue') |
382 | getMsg(msg.value.content.project, function (err, gitRepo) { |
383 | if (gitRepo) |
384 | msg.value.content.repoName = gitRepo.value.content.name |
385 | cb(null, msg) |
386 | }) |
387 | else |
388 | cb(null, msg) |
389 | } |
390 | } |
391 | |
392 | function serveBlob(req, res, sbot, id) { |
393 | if (req.headers['if-none-match'] === id) return respond(res, 304) |
394 | sbot.blobs.has(id, function (err, has) { |
395 | if (err) { |
396 | if (/^invalid/.test(err.message)) return respond(res, 400, err.message) |
397 | else return respond(res, 500, err.message || err) |
398 | } |
399 | if (!has) return respond(res, 404, 'Not found') |
400 | res.writeHead(200, { |
401 | 'Cache-Control': 'public, max-age=315360000', |
402 | 'etag': id |
403 | }) |
404 | pull( |
405 | sbot.blobs.get(id), |
406 | toPull(res, function (err) { |
407 | if (err) console.error('[viewer]', err) |
408 | }) |
409 | ) |
410 | }) |
411 | } |
412 | |
413 | function getMsgWithValue(sbot, id, cb) { |
414 | sbot.get(id, function (err, value) { |
415 | if (err) return cb(err) |
416 | cb(null, {key: id, value: value}) |
417 | }) |
418 | } |
419 | |
420 | function respond(res, status, message) { |
421 | res.writeHead(status) |
422 | res.end(message) |
423 | } |
424 | |
425 | function ctype(name) { |
426 | switch (name && /[^.\/]*$/.exec(name)[0] || 'html') { |
427 | case 'html': return 'text/html' |
428 | case 'js': return 'text/javascript' |
429 | case 'css': return 'text/css' |
430 | case 'json': return 'application/json' |
431 | case 'rss': return 'text/xml' |
432 | } |
433 | } |
434 | |
435 | function servePath(req, res, url) { |
436 | switch (url) { |
437 | case '/robots.txt': return res.end('User-agent: *') |
438 | } |
439 | var m = /^(\/?[^\/]*)(\/.*)?$/.exec(url) |
440 | switch (m[1]) { |
441 | case '/static': return serveStatic(req, res, m[2]) |
442 | case '/emoji': return serveEmoji(req, res, m[2]) |
443 | } |
444 | return respond(res, 404, 'Not found') |
445 | } |
446 | |
447 | function ifModified(req, lastMod) { |
448 | var ifModSince = req.headers['if-modified-since'] |
449 | if (!ifModSince) return false |
450 | var d = new Date(ifModSince) |
451 | return d && Math.floor(d/1000) >= Math.floor(lastMod/1000) |
452 | } |
453 | |
454 | function serveStatic(req, res, file) { |
455 | serveFile(req, res, path.join(__dirname, 'static', file)) |
456 | } |
457 | |
458 | function serveFile(req, res, file) { |
459 | fs.stat(file, function (err, stat) { |
460 | if (err && err.code === 'ENOENT') return respond(res, 404, 'Not found') |
461 | if (err) return respond(res, 500, err.stack || err) |
462 | if (!stat.isFile()) return respond(res, 403, 'May only load files') |
463 | if (ifModified(req, stat.mtime)) return respond(res, 304, 'Not modified') |
464 | res.writeHead(200, { |
465 | 'Content-Type': ctype(file), |
466 | 'Content-Length': stat.size, |
467 | 'Last-Modified': stat.mtime.toGMTString() |
468 | }) |
469 | fs.createReadStream(file).pipe(res) |
470 | }) |
471 | } |
472 | |
473 | function prepend(fn, arg) { |
474 | return function (read) { |
475 | return function (abort, cb) { |
476 | if (fn && !abort) { |
477 | var _fn = fn |
478 | fn = null |
479 | return _fn(arg, function (err, value) { |
480 | if (err) return read(err, function (err) { |
481 | cb(err || true) |
482 | }) |
483 | cb(null, value) |
484 | }) |
485 | } |
486 | read(abort, cb) |
487 | } |
488 | } |
489 | } |
490 |
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