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1 | 'use strict' | |
2 | ||
3 | const each = require('async/each') | |
4 | const eachLimit = require('async/eachLimit') | |
5 | const eachSeries = require('async/eachSeries') | |
6 | const fs = require('fs') | |
7 | const request = require('request') | |
8 | const waterfall = require('async/waterfall') | |
9 | ||
10 | const constants = require('../initializers/constants') | |
11 | const db = require('../initializers/database') | |
12 | const logger = require('../helpers/logger') | |
13 | const requests = require('../helpers/requests') | |
14 | ||
15 | const friends = { | |
16 | addVideoToFriends, | |
17 | hasFriends, | |
18 | getMyCertificate, | |
19 | makeFriends, | |
20 | quitFriends, | |
21 | removeVideoToFriends, | |
22 | sendOwnedVideosToPod | |
23 | } | |
24 | ||
25 | function addVideoToFriends (video) { | |
26 | createRequest('add', constants.REQUEST_ENDPOINTS.VIDEOS, video) | |
27 | } | |
28 | ||
29 | function hasFriends (callback) { | |
30 | db.Pod.countAll(function (err, count) { | |
31 | if (err) return callback(err) | |
32 | ||
33 | const hasFriends = (count !== 0) | |
34 | callback(null, hasFriends) | |
35 | }) | |
36 | } | |
37 | ||
38 | function getMyCertificate (callback) { | |
39 | fs.readFile(constants.CONFIG.STORAGE.CERT_DIR + 'peertube.pub', 'utf8', callback) | |
40 | } | |
41 | ||
42 | function makeFriends (hosts, callback) { | |
43 | const podsScore = {} | |
44 | ||
45 | logger.info('Make friends!') | |
46 | getMyCertificate(function (err, cert) { | |
47 | if (err) { | |
48 | logger.error('Cannot read public cert.') | |
49 | return callback(err) | |
50 | } | |
51 | ||
52 | eachSeries(hosts, function (host, callbackEach) { | |
53 | computeForeignPodsList(host, podsScore, callbackEach) | |
54 | }, function (err) { | |
55 | if (err) return callback(err) | |
56 | ||
57 | logger.debug('Pods scores computed.', { podsScore: podsScore }) | |
58 | const podsList = computeWinningPods(hosts, podsScore) | |
59 | logger.debug('Pods that we keep.', { podsToKeep: podsList }) | |
60 | ||
61 | makeRequestsToWinningPods(cert, podsList, callback) | |
62 | }) | |
63 | }) | |
64 | } | |
65 | ||
66 | function quitFriends (callback) { | |
67 | // Stop pool requests | |
68 | db.Request.deactivate() | |
69 | ||
70 | waterfall([ | |
71 | function flushRequests (callbackAsync) { | |
72 | db.Request.flush(callbackAsync) | |
73 | }, | |
74 | ||
75 | function getPodsList (callbackAsync) { | |
76 | return db.Pod.list(callbackAsync) | |
77 | }, | |
78 | ||
79 | function announceIQuitMyFriends (pods, callbackAsync) { | |
80 | const requestParams = { | |
81 | method: 'POST', | |
82 | path: '/api/' + constants.API_VERSION + '/pods/remove', | |
83 | sign: true | |
84 | } | |
85 | ||
86 | // Announce we quit them | |
87 | // We don't care if the request fails | |
88 | // The other pod will exclude us automatically after a while | |
89 | eachLimit(pods, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) { | |
90 | requestParams.toPod = pod | |
91 | requests.makeSecureRequest(requestParams, callbackEach) | |
92 | }, function (err) { | |
93 | if (err) { | |
94 | logger.error('Some errors while quitting friends.', { err: err }) | |
95 | // Don't stop the process | |
96 | } | |
97 | ||
98 | return callbackAsync(null, pods) | |
99 | }) | |
100 | }, | |
101 | ||
102 | function removePodsFromDB (pods, callbackAsync) { | |
103 | each(pods, function (pod, callbackEach) { | |
104 | pod.destroy().asCallback(callbackEach) | |
105 | }, callbackAsync) | |
106 | } | |
107 | ], function (err) { | |
108 | // Don't forget to re activate the scheduler, even if there was an error | |
109 | db.Request.activate() | |
110 | ||
111 | if (err) return callback(err) | |
112 | ||
113 | logger.info('Removed all remote videos.') | |
114 | return callback(null) | |
115 | }) | |
116 | } | |
117 | ||
118 | function removeVideoToFriends (videoParams) { | |
119 | createRequest('remove', constants.REQUEST_ENDPOINTS.VIDEOS, videoParams) | |
120 | } | |
121 | ||
122 | function sendOwnedVideosToPod (podId) { | |
123 | db.Video.listOwnedAndPopulateAuthorAndTags(function (err, videosList) { | |
124 | if (err) { | |
125 | logger.error('Cannot get the list of videos we own.') | |
126 | return | |
127 | } | |
128 | ||
129 | videosList.forEach(function (video) { | |
130 | video.toRemoteJSON(function (err, remoteVideo) { | |
131 | if (err) { | |
132 | logger.error('Cannot convert video to remote.', { error: err }) | |
133 | // Don't break the process | |
134 | return | |
135 | } | |
136 | ||
137 | createRequest('add', constants.REQUEST_ENDPOINTS.VIDEOS, remoteVideo, [ podId ]) | |
138 | }) | |
139 | }) | |
140 | }) | |
141 | } | |
142 | ||
143 | // --------------------------------------------------------------------------- | |
144 | ||
145 | module.exports = friends | |
146 | ||
147 | // --------------------------------------------------------------------------- | |
148 | ||
149 | function computeForeignPodsList (host, podsScore, callback) { | |
150 | getForeignPodsList(host, function (err, foreignPodsList) { | |
151 | if (err) return callback(err) | |
152 | ||
153 | if (!foreignPodsList) foreignPodsList = [] | |
154 | ||
155 | // Let's give 1 point to the pod we ask the friends list | |
156 | foreignPodsList.push({ host }) | |
157 | ||
158 | foreignPodsList.forEach(function (foreignPod) { | |
159 | const foreignPodHost = foreignPod.host | |
160 | ||
161 | if (podsScore[foreignPodHost]) podsScore[foreignPodHost]++ | |
162 | else podsScore[foreignPodHost] = 1 | |
163 | }) | |
164 | ||
165 | callback() | |
166 | }) | |
167 | } | |
168 | ||
169 | function computeWinningPods (hosts, podsScore) { | |
170 | // Build the list of pods to add | |
171 | // Only add a pod if it exists in more than a half base pods | |
172 | const podsList = [] | |
173 | const baseScore = hosts.length / 2 | |
174 | Object.keys(podsScore).forEach(function (podHost) { | |
175 | // If the pod is not me and with a good score we add it | |
176 | if (isMe(podHost) === false && podsScore[podHost] > baseScore) { | |
177 | podsList.push({ host: podHost }) | |
178 | } | |
179 | }) | |
180 | ||
181 | return podsList | |
182 | } | |
183 | ||
184 | function getForeignPodsList (host, callback) { | |
185 | const path = '/api/' + constants.API_VERSION + '/pods' | |
186 | ||
187 | request.get(constants.REMOTE_SCHEME.HTTP + '://' + host + path, function (err, response, body) { | |
188 | if (err) return callback(err) | |
189 | ||
190 | try { | |
191 | const json = JSON.parse(body) | |
192 | return callback(null, json) | |
193 | } catch (err) { | |
194 | return callback(err) | |
195 | } | |
196 | }) | |
197 | } | |
198 | ||
199 | function makeRequestsToWinningPods (cert, podsList, callback) { | |
200 | // Stop pool requests | |
201 | db.Request.deactivate() | |
202 | // Flush pool requests | |
203 | db.Request.forceSend() | |
204 | ||
205 | eachLimit(podsList, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) { | |
206 | const params = { | |
207 | url: constants.REMOTE_SCHEME.HTTP + '://' + pod.host + '/api/' + constants.API_VERSION + '/pods/', | |
208 | method: 'POST', | |
209 | json: { | |
210 | host: constants.CONFIG.WEBSERVER.HOST, | |
211 | publicKey: cert | |
212 | } | |
213 | } | |
214 | ||
215 | requests.makeRetryRequest(params, function (err, res, body) { | |
216 | if (err) { | |
217 | logger.error('Error with adding %s pod.', pod.host, { error: err }) | |
218 | // Don't break the process | |
219 | return callbackEach() | |
220 | } | |
221 | ||
222 | if (res.statusCode === 200) { | |
223 | const podObj = db.Pod.build({ host: pod.host, publicKey: body.cert }) | |
224 | podObj.save().asCallback(function (err, podCreated) { | |
225 | if (err) { | |
226 | logger.error('Cannot add friend %s pod.', pod.host, { error: err }) | |
227 | return callbackEach() | |
228 | } | |
229 | ||
230 | // Add our videos to the request scheduler | |
231 | sendOwnedVideosToPod(podCreated.id) | |
232 | ||
233 | return callbackEach() | |
234 | }) | |
235 | } else { | |
236 | logger.error('Status not 200 for %s pod.', pod.host) | |
237 | return callbackEach() | |
238 | } | |
239 | }) | |
240 | }, function endRequests () { | |
241 | // Final callback, we've ended all the requests | |
242 | // Now we made new friends, we can re activate the pool of requests | |
243 | db.Request.activate() | |
244 | ||
245 | logger.debug('makeRequestsToWinningPods finished.') | |
246 | return callback() | |
247 | }) | |
248 | } | |
249 | ||
250 | // Wrapper that populate "to" argument with all our friends if it is not specified | |
251 | function createRequest (type, endpoint, data, to) { | |
252 | if (to) return _createRequest(type, endpoint, data, to) | |
253 | ||
254 | // If the "to" pods is not specified, we send the request to all our friends | |
255 | db.Pod.listAllIds(function (err, podIds) { | |
256 | if (err) { | |
257 | logger.error('Cannot get pod ids', { error: err }) | |
258 | return | |
259 | } | |
260 | ||
261 | return _createRequest(type, endpoint, data, podIds) | |
262 | }) | |
263 | } | |
264 | ||
265 | function _createRequest (type, endpoint, data, to) { | |
266 | const pods = [] | |
267 | ||
268 | // If there are no destination pods abort | |
269 | if (to.length === 0) return | |
270 | ||
271 | to.forEach(function (toPod) { | |
272 | pods.push(db.Pod.build({ id: toPod })) | |
273 | }) | |
274 | ||
275 | const createQuery = { | |
276 | endpoint, | |
277 | request: { | |
278 | type: type, | |
279 | data: data | |
280 | } | |
281 | } | |
282 | ||
283 | // We run in transaction to keep coherency between Request and RequestToPod tables | |
284 | db.sequelize.transaction(function (t) { | |
285 | const dbRequestOptions = { | |
286 | transaction: t | |
287 | } | |
288 | ||
289 | return db.Request.create(createQuery, dbRequestOptions).then(function (request) { | |
290 | return request.setPods(pods, dbRequestOptions) | |
291 | }) | |
292 | }).asCallback(function (err) { | |
293 | if (err) logger.error('Error in createRequest transaction.', { error: err }) | |
294 | }) | |
295 | } | |
296 | ||
297 | function isMe (host) { | |
298 | return host === constants.CONFIG.WEBSERVER.HOST | |
299 | } |