Files: 07dd6934bb87b5461859bed91c1e7761f254db75 / index.js
13006 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 | |
42 | var getMsg = memo({cache: lru(100)}, getMsgWithValue, sbot) |
43 | var getAbout = memo({cache: lru(100)}, require('./lib/about'), sbot) |
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 | exports.serveFeed = function(req, res, feedId, ext) { |
69 | console.log("serving feed: " + feedId) |
70 | |
71 | var showAll = req.url.endsWith("?showAll"); |
72 | |
73 | getAbout(feedId, function (err, about) { |
74 | if (err) return respond(res, 500, err.stack || err) |
75 | |
76 | function render() { |
77 | switch (ext) { |
78 | case 'rss': |
79 | return pull( |
80 | // formatMsgs(feedId, ext, defaultOpts) |
81 | renderRssItem(defaultOpts), wrapRss(about.name, defaultOpts) |
82 | ); |
83 | default: |
84 | return pull( |
85 | renderAbout(defaultOpts, about, |
86 | renderShowAll(req.url)), wrapPage(about.name) |
87 | ); |
88 | } |
89 | } |
90 | |
91 | pull( |
92 | sbot.createUserStream({ id: feedId, reverse: true, |
93 | limit: showAll ? -1 : (ext == 'rss' ? 25 : 10) }), |
94 | pull.collect(function (err, logs) { |
95 | if (err) return respond(res, 500, err.stack || err) |
96 | res.writeHead(200, { |
97 | 'Content-Type': ctype(ext) |
98 | }) |
99 | pull( |
100 | pull.values(logs), |
101 | paramap(addAuthorAbout, 8), |
102 | paramap(addFollowAbout, 8), |
103 | paramap(addVoteMessage, 8), |
104 | paramap(addGitLinks, 8), |
105 | render(), |
106 | toPull(res, function (err) { |
107 | if (err) console.error('[viewer]', err) |
108 | }) |
109 | ) |
110 | }) |
111 | ) |
112 | }) |
113 | } |
114 | |
115 | exports.serveUserFeed = function(req, res) { |
116 | var feedId = req.url.substring(req.url.lastIndexOf('user-feed/')+10, 100) |
117 | console.log("serving user feed: " + feedId) |
118 | |
119 | var following = [] |
120 | var channelSubscriptions = [] |
121 | |
122 | getAbout(feedId, function (err, about) { |
123 | pull( |
124 | sbot.createUserStream({ id: feedId }), |
125 | pull.filter((msg) => { |
126 | return !msg.value || |
127 | msg.value.content.type == 'contact' || |
128 | (msg.value.content.type == 'channel' && |
129 | typeof msg.value.content.subscribed != 'undefined') |
130 | }), |
131 | pull.collect(function (err, msgs) { |
132 | msgs.forEach((msg) => { |
133 | if (msg.value.content.type == 'contact') |
134 | { |
135 | if (msg.value.content.following) |
136 | following[msg.value.content.contact] = 1 |
137 | else |
138 | delete following[msg.value.content.contact] |
139 | } |
140 | else // channel subscription |
141 | { |
142 | if (msg.value.content.subscribed) |
143 | channelSubscriptions[msg.value.content.channel] = 1 |
144 | else |
145 | delete channelSubscriptions[msg.value.content.channel] |
146 | } |
147 | }) |
148 | |
149 | serveFeeds(req, res, following, channelSubscriptions, feedId, |
150 | 'user feed ' + (about ? about.name : "")) |
151 | }) |
152 | ) |
153 | }) |
154 | } |
155 | |
156 | function serveFeeds(req, res, following, channelSubscriptions, feedId, name) { |
157 | var feedOpts = Object.assign({}, defaultOpts, { |
158 | renderPrivate: false, |
159 | renderSubscribe: false, |
160 | renderAbout: false |
161 | }) |
162 | |
163 | pull( |
164 | sbot.createLogStream({ reverse: true, limit: 5000 }), |
165 | pull.filter((msg) => { |
166 | return !msg.value || |
167 | (msg.value.author in following || |
168 | msg.value.content.channel in channelSubscriptions) |
169 | }), |
170 | pull.take(150), |
171 | pull.collect(function (err, logs) { |
172 | if (err) return respond(res, 500, err.stack || err) |
173 | res.writeHead(200, { |
174 | 'Content-Type': ctype("html") |
175 | }) |
176 | pull( |
177 | pull.values(logs), |
178 | paramap(addAuthorAbout, 8), |
179 | paramap(addFollowAbout, 8), |
180 | paramap(addVoteMessage, 8), |
181 | paramap(addGitLinks, 8), |
182 | pull(renderThread(feedOpts), wrapPage(name)), |
183 | toPull(res, function (err) { |
184 | if (err) console.error('[viewer]', err) |
185 | }) |
186 | ) |
187 | }) |
188 | ) |
189 | } |
190 | |
191 | exports.serveChannel = function(req, res) { |
192 | var channelId = req.url.substring(req.url.lastIndexOf('channel/')+8, 100) |
193 | console.log("serving channel: " + channelId) |
194 | |
195 | var showAll = req.url.endsWith("?showAll") |
196 | |
197 | pull( |
198 | sbot.query.read({ limit: showAll ? 300 : 10, reverse: true, |
199 | query: [{$filter: { value: { content: { channel: channelId }}}}]}), |
200 | pull.collect(function (err, logs) { |
201 | if (err) return respond(res, 500, err.stack || err) |
202 | res.writeHead(200, { |
203 | 'Content-Type': ctype("html") |
204 | }) |
205 | pull( |
206 | pull.values(logs), |
207 | paramap(addAuthorAbout, 8), |
208 | paramap(addVoteMessage, 8), |
209 | pull(renderThread(defaultOpts, '', renderShowAll(req.url)), |
210 | wrapPage('#' + channelId)), |
211 | toPull(res, function (err) { |
212 | if (err) console.error('[viewer]', err) |
213 | }) |
214 | ) |
215 | }) |
216 | ) |
217 | } |
218 | |
219 | exports.serveId = function(req, res, id, ext, query) { |
220 | var q = query ? qs.parse(query) : {} |
221 | var includeRoot = !('noroot' in q) |
222 | var base = q.base || conf.base |
223 | var baseToken |
224 | if (!base) { |
225 | if (ext === 'js') base = baseToken = '__BASE_' + Math.random() + '_' |
226 | else base = '/' |
227 | } |
228 | var opts = { |
229 | base: base, |
230 | base_token: baseToken, |
231 | msg_base: q.msg_base || conf.msg_base || base, |
232 | feed_base: q.feed_base || conf.feed_base || base, |
233 | blob_base: q.blob_base || conf.blob_base || base, |
234 | img_base: q.img_base || conf.img_base || base, |
235 | emoji_base: q.emoji_base || conf.emoji_base || (base + 'emoji/'), |
236 | } |
237 | opts.marked = { |
238 | gfm: true, |
239 | mentions: true, |
240 | tables: true, |
241 | breaks: true, |
242 | pedantic: false, |
243 | sanitize: true, |
244 | smartLists: true, |
245 | smartypants: false, |
246 | emoji: renderEmoji, |
247 | renderer: new MdRenderer(opts) |
248 | } |
249 | |
250 | var format = formatMsgs(id, ext, opts) |
251 | if (format === null) return respond(res, 415, 'Invalid format') |
252 | |
253 | pull( |
254 | sbot.links({dest: id, values: true }), |
255 | includeRoot && prepend(getMsg, id), |
256 | pull.unique('key'), |
257 | pull.collect(function (err, links) { |
258 | if (err) return respond(res, 500, err.stack || err) |
259 | var etag = hash(sort.heads(links).concat(appHash, ext, qs)) |
260 | if (req.headers['if-none-match'] === etag) return respond(res, 304) |
261 | res.writeHead(200, { |
262 | 'Content-Type': ctype(ext), |
263 | 'etag': etag |
264 | }) |
265 | pull( |
266 | pull.values(sort(links)), |
267 | paramap(addAuthorAbout, 8), |
268 | format, |
269 | toPull(res, function (err) { |
270 | if (err) console.error('[viewer]', err) |
271 | }) |
272 | ) |
273 | }) |
274 | ) |
275 | } |
276 | |
277 | function addFollowAbout(msg, cb) { |
278 | if (msg.value.content.contact) |
279 | getAbout(msg.value.content.contact, function (err, about) { |
280 | if (err) return cb(err) |
281 | msg.value.content.contactAbout = about |
282 | cb(null, msg) |
283 | }) |
284 | else |
285 | cb(null, msg) |
286 | } |
287 | |
288 | function addVoteMessage(msg, cb) { |
289 | if (msg.value.content.type == 'vote' && msg.value.content.vote.link[0] == '%') |
290 | getMsg(msg.value.content.vote.link, function (err, linkedMsg) { |
291 | if (linkedMsg) |
292 | msg.value.content.vote.linkedText = linkedMsg.value.content.text |
293 | cb(null, msg) |
294 | }) |
295 | else |
296 | cb(null, msg) |
297 | } |
298 | |
299 | function addAuthorAbout(msg, cb) { |
300 | getAbout(msg.value.author, function (err, about) { |
301 | if (err) return cb(err) |
302 | msg.author = about |
303 | cb(null, msg) |
304 | }) |
305 | } |
306 | |
307 | function addGitLinks(msg, cb) { |
308 | if (msg.value.content.type == 'git-update') |
309 | getMsg(msg.value.content.repo, function (err, gitRepo) { |
310 | if (gitRepo) |
311 | msg.value.content.repoName = gitRepo.value.content.name |
312 | cb(null, msg) |
313 | }) |
314 | else if (msg.value.content.type == 'issue') |
315 | getMsg(msg.value.content.project, function (err, gitRepo) { |
316 | if (gitRepo) |
317 | msg.value.content.repoName = gitRepo.value.content.name |
318 | cb(null, msg) |
319 | }) |
320 | else |
321 | cb(null, msg) |
322 | } |
323 | } |
324 | |
325 | exports.serveHttp = function (sbot, config) { |
326 | var conf = config.viewer || {} |
327 | var port = conf.port || 8807 |
328 | var host = conf.host || config.host || '::' |
329 | |
330 | var serveAcmeChallenge = require('ssb-acme-validator')(sbot) |
331 | |
332 | http.createServer(serve).listen(port, host, function () { |
333 | console.log('[viewer] Listening on http://' + host + ':' + port) |
334 | }) |
335 | |
336 | function serve(req, res) { |
337 | if (req.method !== 'GET' && req.method !== 'HEAD') { |
338 | return respond(res, 405, 'Method must be GET or HEAD') |
339 | } |
340 | |
341 | var m = urlIdRegex.exec(req.url) |
342 | |
343 | if (req.url.startsWith('/user-feed/')) return exports.serveUserFeed(req, res) |
344 | else if (req.url.startsWith('/channel/')) return exports.serveChannel(req, res) |
345 | else if (req.url.startsWith('/.well-known/acme-challenge')) return serveAcmeChallenge(req, res) |
346 | |
347 | if (m[2] && m[2].length === 3) { |
348 | m[1] = decodeURIComponent(m[1]) |
349 | m[2] = m[1][0] |
350 | } |
351 | switch (m[2]) { |
352 | case '%': return exports.serveId(req, res, m[1], m[3], m[5]) |
353 | case '@': return exports.serveFeed(req, res, m[1], m[3], m[5]) |
354 | case '&': return serveBlob(req, res, sbot, m[1]) |
355 | default: return servePath(req, res, m[4]) |
356 | } |
357 | } |
358 | } |
359 | |
360 | function serveBlob(req, res, sbot, id) { |
361 | if (req.headers['if-none-match'] === id) return respond(res, 304) |
362 | sbot.blobs.has(id, function (err, has) { |
363 | if (err) { |
364 | if (/^invalid/.test(err.message)) return respond(res, 400, err.message) |
365 | else return respond(res, 500, err.message || err) |
366 | } |
367 | if (!has) return respond(res, 404, 'Not found') |
368 | res.writeHead(200, { |
369 | 'Cache-Control': 'public, max-age=315360000', |
370 | 'etag': id |
371 | }) |
372 | pull( |
373 | sbot.blobs.get(id), |
374 | toPull(res, function (err) { |
375 | if (err) console.error('[viewer]', err) |
376 | }) |
377 | ) |
378 | }) |
379 | } |
380 | |
381 | function getMsgWithValue(sbot, id, cb) { |
382 | sbot.get(id, function (err, value) { |
383 | if (err) return cb(err) |
384 | cb(null, {key: id, value: value}) |
385 | }) |
386 | } |
387 | |
388 | function respond(res, status, message) { |
389 | res.writeHead(status) |
390 | res.end(message) |
391 | } |
392 | |
393 | function ctype(name) { |
394 | switch (name && /[^.\/]*$/.exec(name)[0] || 'html') { |
395 | case 'html': return 'text/html' |
396 | case 'js': return 'text/javascript' |
397 | case 'css': return 'text/css' |
398 | case 'json': return 'application/json' |
399 | case 'rss': return 'text/xml' |
400 | } |
401 | } |
402 | |
403 | function servePath(req, res, url) { |
404 | switch (url) { |
405 | case '/robots.txt': return res.end('User-agent: *') |
406 | } |
407 | var m = /^(\/?[^\/]*)(\/.*)?$/.exec(url) |
408 | switch (m[1]) { |
409 | case '/static': return serveStatic(req, res, m[2]) |
410 | case '/emoji': return serveEmoji(req, res, m[2]) |
411 | } |
412 | return respond(res, 404, 'Not found') |
413 | } |
414 | |
415 | function ifModified(req, lastMod) { |
416 | var ifModSince = req.headers['if-modified-since'] |
417 | if (!ifModSince) return false |
418 | var d = new Date(ifModSince) |
419 | return d && Math.floor(d/1000) >= Math.floor(lastMod/1000) |
420 | } |
421 | |
422 | function serveStatic(req, res, file) { |
423 | serveFile(req, res, path.join(__dirname, 'static', file)) |
424 | } |
425 | |
426 | function serveFile(req, res, file) { |
427 | fs.stat(file, function (err, stat) { |
428 | if (err && err.code === 'ENOENT') return respond(res, 404, 'Not found') |
429 | if (err) return respond(res, 500, err.stack || err) |
430 | if (!stat.isFile()) return respond(res, 403, 'May only load files') |
431 | if (ifModified(req, stat.mtime)) return respond(res, 304, 'Not modified') |
432 | res.writeHead(200, { |
433 | 'Content-Type': ctype(file), |
434 | 'Content-Length': stat.size, |
435 | 'Last-Modified': stat.mtime.toGMTString() |
436 | }) |
437 | fs.createReadStream(file).pipe(res) |
438 | }) |
439 | } |
440 | |
441 | function prepend(fn, arg) { |
442 | return function (read) { |
443 | return function (abort, cb) { |
444 | if (fn && !abort) { |
445 | var _fn = fn |
446 | fn = null |
447 | return _fn(arg, function (err, value) { |
448 | if (err) return read(err, function (err) { |
449 | cb(err || true) |
450 | }) |
451 | cb(null, value) |
452 | }) |
453 | } |
454 | read(abort, cb) |
455 | } |
456 | } |
457 | } |
458 |
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