Files: e6bc3b037ac455d656641e9e03e1ccba0a440ea0 / index.js
12800 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 serveEmoji = require('emoji-server')() |
13 | var { |
14 | MdRenderer, |
15 | renderEmoji, |
16 | formatMsgs, |
17 | wrapPage, |
18 | renderThread, |
19 | renderAbout, |
20 | renderShowAll, |
21 | renderRssItem, |
22 | wrapRss, |
23 | } = require('./render'); |
24 | |
25 | var appHash = hash([fs.readFileSync(__filename)]) |
26 | |
27 | var urlIdRegex = /^(?:\/(([%&@]|%25|%26|%40)(?:[A-Za-z0-9\/+]|%2[Ff]|%2[Bb]){43}(?:=|%3[Dd])\.(?:sha256|ed25519))(?:\.([^?]*))?|(\/.*?))(?:\?(.*))?$/ |
28 | |
29 | function hash(arr) { |
30 | return arr.reduce(function (hash, item) { |
31 | return hash.update(String(item)) |
32 | }, crypto.createHash('sha256')).digest('base64') |
33 | } |
34 | |
35 | exports.name = 'viewer' |
36 | exports.manifest = {} |
37 | exports.version = require('./package').version |
38 | |
39 | exports.init = function (sbot, config) { |
40 | var conf = config.viewer || {} |
41 | var port = conf.port || 8807 |
42 | var host = conf.host || config.host || '::' |
43 | |
44 | var base = conf.base || '/' |
45 | var defaultOpts = { |
46 | base: base, |
47 | msg_base: conf.msg_base || base, |
48 | feed_base: conf.feed_base || base, |
49 | blob_base: conf.blob_base || base, |
50 | img_base: conf.img_base || base, |
51 | emoji_base: conf.emoji_base || (base + 'emoji/'), |
52 | } |
53 | |
54 | defaultOpts.marked = { |
55 | gfm: true, |
56 | mentions: true, |
57 | tables: true, |
58 | breaks: true, |
59 | pedantic: false, |
60 | sanitize: true, |
61 | smartLists: true, |
62 | smartypants: false, |
63 | emoji: renderEmoji, |
64 | renderer: new MdRenderer(defaultOpts) |
65 | } |
66 | |
67 | var getMsg = memo({cache: lru(100)}, getMsgWithValue, sbot) |
68 | var getAbout = memo({cache: lru(100)}, require('./lib/about'), sbot) |
69 | var serveAcmeChallenge = require('ssb-acme-validator')(sbot) |
70 | |
71 | http.createServer(serve).listen(port, host, function () { |
72 | console.log('[viewer] Listening on http://' + host + ':' + port) |
73 | }) |
74 | |
75 | function serve(req, res) { |
76 | if (req.method !== 'GET' && req.method !== 'HEAD') { |
77 | return respond(res, 405, 'Method must be GET or HEAD') |
78 | } |
79 | |
80 | var m = urlIdRegex.exec(req.url) |
81 | |
82 | if (req.url.startsWith('/user-feed/')) return serveUserFeed(req, res, m[4]) |
83 | else if (req.url.startsWith('/channel/')) return serveChannel(req, res, m[4]) |
84 | else if (req.url.startsWith('/.well-known/acme-challenge')) return serveAcmeChallenge(req, res) |
85 | |
86 | if (m[2] && m[2].length === 3) { |
87 | m[1] = decodeURIComponent(m[1]) |
88 | m[2] = m[1][0] |
89 | } |
90 | switch (m[2]) { |
91 | case '%': return serveId(req, res, m[1], m[3], m[5]) |
92 | case '@': return serveFeed(req, res, m[1], m[3], m[5]) |
93 | case '&': return serveBlob(req, res, sbot, m[1]) |
94 | default: return servePath(req, res, m[4]) |
95 | } |
96 | } |
97 | |
98 | function serveFeed(req, res, feedId, ext) { |
99 | console.log("serving feed: " + feedId) |
100 | |
101 | var showAll = req.url.endsWith("?showAll"); |
102 | |
103 | getAbout(feedId, function (err, about) { |
104 | if (err) return respond(res, 500, err.stack || err) |
105 | |
106 | function render() { |
107 | switch (ext) { |
108 | case 'rss': |
109 | return pull( |
110 | // formatMsgs(feedId, ext, defaultOpts) |
111 | renderRssItem(defaultOpts), wrapRss(about.name, defaultOpts) |
112 | ); |
113 | default: |
114 | return pull( |
115 | renderAbout(defaultOpts, about, |
116 | renderShowAll(showAll, req.url)), wrapPage(about.name) |
117 | ); |
118 | } |
119 | } |
120 | |
121 | pull( |
122 | sbot.createUserStream({ id: feedId, reverse: true, limit: showAll ? -1 : (ext == 'rss' ? 25 : 10) }), |
123 | pull.collect(function (err, logs) { |
124 | if (err) return respond(res, 500, err.stack || err) |
125 | res.writeHead(200, { |
126 | 'Content-Type': ctype(ext) |
127 | }) |
128 | pull( |
129 | pull.values(logs), |
130 | paramap(addAuthorAbout, 8), |
131 | paramap(addFollowAbout, 8), |
132 | paramap(addVoteMessage, 8), |
133 | paramap(addGitLinks, 8), |
134 | render(), |
135 | toPull(res, function (err) { |
136 | if (err) console.error('[viewer]', err) |
137 | }) |
138 | ) |
139 | }) |
140 | ) |
141 | }) |
142 | } |
143 | |
144 | function serveUserFeed(req, res, url) { |
145 | var feedId = url.substring(url.lastIndexOf('user-feed/')+10, 100) |
146 | console.log("serving user feed: " + feedId) |
147 | |
148 | var following = [] |
149 | var channelSubscriptions = [] |
150 | |
151 | getAbout(feedId, function (err, about) { |
152 | pull( |
153 | sbot.createUserStream({ id: feedId }), |
154 | pull.filter((msg) => { |
155 | return !msg.value || |
156 | msg.value.content.type == 'contact' || |
157 | (msg.value.content.type == 'channel' && |
158 | typeof msg.value.content.subscribed != 'undefined') |
159 | }), |
160 | pull.collect(function (err, msgs) { |
161 | msgs.forEach((msg) => { |
162 | if (msg.value.content.type == 'contact') |
163 | { |
164 | if (msg.value.content.following) |
165 | following[msg.value.content.contact] = 1 |
166 | else |
167 | delete following[msg.value.content.contact] |
168 | } |
169 | else // channel subscription |
170 | { |
171 | if (msg.value.content.subscribed) |
172 | channelSubscriptions[msg.value.content.channel] = 1 |
173 | else |
174 | delete channelSubscriptions[msg.value.content.channel] |
175 | } |
176 | }) |
177 | |
178 | serveFeeds(req, res, following, channelSubscriptions, feedId, |
179 | 'user feed ' + (about ? about.name : "")) |
180 | }) |
181 | ) |
182 | }) |
183 | } |
184 | |
185 | function serveFeeds(req, res, following, channelSubscriptions, feedId, name) { |
186 | var feedOpts = Object.assign({}, defaultOpts, { |
187 | renderPrivate: false, |
188 | renderSubscribe: false |
189 | }) |
190 | |
191 | pull( |
192 | sbot.createLogStream({ reverse: true, limit: 5000 }), |
193 | pull.filter((msg) => { |
194 | return !msg.value || |
195 | (msg.value.author in following || |
196 | msg.value.content.channel in channelSubscriptions) |
197 | }), |
198 | pull.take(150), |
199 | pull.collect(function (err, logs) { |
200 | if (err) return respond(res, 500, err.stack || err) |
201 | res.writeHead(200, { |
202 | 'Content-Type': ctype("html") |
203 | }) |
204 | pull( |
205 | pull.values(logs), |
206 | paramap(addAuthorAbout, 8), |
207 | paramap(addFollowAbout, 8), |
208 | paramap(addVoteMessage, 8), |
209 | paramap(addGitLinks, 8), |
210 | pull(renderThread(feedOpts), wrapPage(name)), |
211 | toPull(res, function (err) { |
212 | if (err) console.error('[viewer]', err) |
213 | }) |
214 | ) |
215 | }) |
216 | ) |
217 | } |
218 | |
219 | function serveChannel(req, res, url) { |
220 | var channelId = url.substring(url.lastIndexOf('channel/')+8, 100) |
221 | console.log("serving channel: " + channelId) |
222 | |
223 | var showAll = req.url.endsWith("?showAll") |
224 | |
225 | pull( |
226 | sbot.query.read({ limit: showAll ? 300 : 10, reverse: true, query: [{$filter: { value: { content: { channel: channelId }}}}]}), |
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(addVoteMessage, 8), |
236 | pull(renderThread(defaultOpts, '', |
237 | renderShowAll(showAll, req.url)), |
238 | wrapPage('#' + channelId)), |
239 | toPull(res, function (err) { |
240 | if (err) console.error('[viewer]', err) |
241 | }) |
242 | ) |
243 | }) |
244 | ) |
245 | } |
246 | |
247 | function serveId(req, res, id, ext, query) { |
248 | var q = query ? qs.parse(query) : {} |
249 | var includeRoot = !('noroot' in q) |
250 | var base = q.base || conf.base |
251 | var baseToken |
252 | if (!base) { |
253 | if (ext === 'js') base = baseToken = '__BASE_' + Math.random() + '_' |
254 | else base = '/' |
255 | } |
256 | var opts = { |
257 | base: base, |
258 | base_token: baseToken, |
259 | msg_base: q.msg_base || conf.msg_base || base, |
260 | feed_base: q.feed_base || conf.feed_base || base, |
261 | blob_base: q.blob_base || conf.blob_base || base, |
262 | img_base: q.img_base || conf.img_base || base, |
263 | emoji_base: q.emoji_base || conf.emoji_base || (base + 'emoji/'), |
264 | } |
265 | opts.marked = { |
266 | gfm: true, |
267 | mentions: true, |
268 | tables: true, |
269 | breaks: true, |
270 | pedantic: false, |
271 | sanitize: true, |
272 | smartLists: true, |
273 | smartypants: false, |
274 | emoji: renderEmoji, |
275 | renderer: new MdRenderer(opts) |
276 | } |
277 | |
278 | var format = formatMsgs(id, ext, opts) |
279 | if (format === null) return respond(res, 415, 'Invalid format') |
280 | |
281 | pull( |
282 | sbot.links({dest: id, values: true }), |
283 | includeRoot && prepend(getMsg, id), |
284 | pull.unique('key'), |
285 | pull.collect(function (err, links) { |
286 | if (err) return respond(res, 500, err.stack || err) |
287 | var etag = hash(sort.heads(links).concat(appHash, ext, qs)) |
288 | if (req.headers['if-none-match'] === etag) return respond(res, 304) |
289 | res.writeHead(200, { |
290 | 'Content-Type': ctype(ext), |
291 | 'etag': etag |
292 | }) |
293 | pull( |
294 | pull.values(sort(links)), |
295 | paramap(addAuthorAbout, 8), |
296 | format, |
297 | toPull(res, function (err) { |
298 | if (err) console.error('[viewer]', err) |
299 | }) |
300 | ) |
301 | }) |
302 | ) |
303 | } |
304 | |
305 | function addFollowAbout(msg, cb) { |
306 | if (msg.value.content.contact) |
307 | getAbout(msg.value.content.contact, function (err, about) { |
308 | if (err) return cb(err) |
309 | msg.value.content.contactAbout = about |
310 | cb(null, msg) |
311 | }) |
312 | else |
313 | cb(null, msg) |
314 | } |
315 | |
316 | function addVoteMessage(msg, cb) { |
317 | if (msg.value.content.type == 'vote' && msg.value.content.vote.link[0] == '%') |
318 | getMsg(msg.value.content.vote.link, function (err, linkedMsg) { |
319 | if (linkedMsg) |
320 | msg.value.content.vote.linkedText = linkedMsg.value.content.text |
321 | cb(null, msg) |
322 | }) |
323 | else |
324 | cb(null, msg) |
325 | } |
326 | |
327 | function addAuthorAbout(msg, cb) { |
328 | getAbout(msg.value.author, function (err, about) { |
329 | if (err) return cb(err) |
330 | msg.author = about |
331 | cb(null, msg) |
332 | }) |
333 | } |
334 | |
335 | function addGitLinks(msg, cb) { |
336 | if (msg.value.content.type == 'git-update') |
337 | getMsg(msg.value.content.repo, function (err, gitRepo) { |
338 | if (gitRepo) |
339 | msg.value.content.repoName = gitRepo.value.content.name |
340 | cb(null, msg) |
341 | }) |
342 | else if (msg.value.content.type == 'issue') |
343 | getMsg(msg.value.content.project, function (err, gitRepo) { |
344 | if (gitRepo) |
345 | msg.value.content.repoName = gitRepo.value.content.name |
346 | cb(null, msg) |
347 | }) |
348 | else |
349 | cb(null, msg) |
350 | } |
351 | } |
352 | |
353 | function serveBlob(req, res, sbot, id) { |
354 | if (req.headers['if-none-match'] === id) return respond(res, 304) |
355 | sbot.blobs.has(id, function (err, has) { |
356 | if (err) { |
357 | if (/^invalid/.test(err.message)) return respond(res, 400, err.message) |
358 | else return respond(res, 500, err.message || err) |
359 | } |
360 | if (!has) return respond(res, 404, 'Not found') |
361 | res.writeHead(200, { |
362 | 'Cache-Control': 'public, max-age=315360000', |
363 | 'etag': id |
364 | }) |
365 | pull( |
366 | sbot.blobs.get(id), |
367 | toPull(res, function (err) { |
368 | if (err) console.error('[viewer]', err) |
369 | }) |
370 | ) |
371 | }) |
372 | } |
373 | |
374 | function getMsgWithValue(sbot, id, cb) { |
375 | sbot.get(id, function (err, value) { |
376 | if (err) return cb(err) |
377 | cb(null, {key: id, value: value}) |
378 | }) |
379 | } |
380 | |
381 | function respond(res, status, message) { |
382 | res.writeHead(status) |
383 | res.end(message) |
384 | } |
385 | |
386 | function ctype(name) { |
387 | switch (name && /[^.\/]*$/.exec(name)[0] || 'html') { |
388 | case 'html': return 'text/html' |
389 | case 'js': return 'text/javascript' |
390 | case 'css': return 'text/css' |
391 | case 'json': return 'application/json' |
392 | case 'rss': return 'text/xml' |
393 | } |
394 | } |
395 | |
396 | function servePath(req, res, url) { |
397 | switch (url) { |
398 | case '/robots.txt': return res.end('User-agent: *') |
399 | } |
400 | var m = /^(\/?[^\/]*)(\/.*)?$/.exec(url) |
401 | switch (m[1]) { |
402 | case '/static': return serveStatic(req, res, m[2]) |
403 | case '/emoji': return serveEmoji(req, res, m[2]) |
404 | } |
405 | return respond(res, 404, 'Not found') |
406 | } |
407 | |
408 | function ifModified(req, lastMod) { |
409 | var ifModSince = req.headers['if-modified-since'] |
410 | if (!ifModSince) return false |
411 | var d = new Date(ifModSince) |
412 | return d && Math.floor(d/1000) >= Math.floor(lastMod/1000) |
413 | } |
414 | |
415 | function serveStatic(req, res, file) { |
416 | serveFile(req, res, path.join(__dirname, 'static', file)) |
417 | } |
418 | |
419 | function serveFile(req, res, file) { |
420 | fs.stat(file, function (err, stat) { |
421 | if (err && err.code === 'ENOENT') return respond(res, 404, 'Not found') |
422 | if (err) return respond(res, 500, err.stack || err) |
423 | if (!stat.isFile()) return respond(res, 403, 'May only load files') |
424 | if (ifModified(req, stat.mtime)) return respond(res, 304, 'Not modified') |
425 | res.writeHead(200, { |
426 | 'Content-Type': ctype(file), |
427 | 'Content-Length': stat.size, |
428 | 'Last-Modified': stat.mtime.toGMTString() |
429 | }) |
430 | fs.createReadStream(file).pipe(res) |
431 | }) |
432 | } |
433 | |
434 | function prepend(fn, arg) { |
435 | return function (read) { |
436 | return function (abort, cb) { |
437 | if (fn && !abort) { |
438 | var _fn = fn |
439 | fn = null |
440 | return _fn(arg, function (err, value) { |
441 | if (err) return read(err, function (err) { |
442 | cb(err || true) |
443 | }) |
444 | cb(null, value) |
445 | }) |
446 | } |
447 | read(abort, cb) |
448 | } |
449 | } |
450 | } |
451 |
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