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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 mongoose = require('mongoose') | |
8 | const request = require('request') | |
9 | const waterfall = require('async/waterfall') | |
10 | ||
11 | const constants = require('../initializers/constants') | |
12 | const logger = require('../helpers/logger') | |
13 | const requests = require('../helpers/requests') | |
14 | ||
15 | const Pod = mongoose.model('Pod') | |
16 | const Request = mongoose.model('Request') | |
17 | const Video = mongoose.model('Video') | |
18 | ||
19 | const friends = { | |
20 | addVideoToFriends, | |
21 | hasFriends, | |
22 | getMyCertificate, | |
23 | makeFriends, | |
24 | quitFriends, | |
25 | removeVideoToFriends, | |
26 | sendOwnedVideosToPod | |
27 | } | |
28 | ||
29 | function addVideoToFriends (video) { | |
30 | createRequest('add', constants.REQUEST_ENDPOINTS.VIDEOS, video) | |
31 | } | |
32 | ||
33 | function hasFriends (callback) { | |
34 | Pod.countAll(function (err, count) { | |
35 | if (err) return callback(err) | |
36 | ||
37 | const hasFriends = (count !== 0) | |
38 | callback(null, hasFriends) | |
39 | }) | |
40 | } | |
41 | ||
42 | function getMyCertificate (callback) { | |
43 | fs.readFile(constants.CONFIG.STORAGE.CERT_DIR + 'peertube.pub', 'utf8', callback) | |
44 | } | |
45 | ||
46 | function makeFriends (hosts, callback) { | |
47 | const podsScore = {} | |
48 | ||
49 | logger.info('Make friends!') | |
50 | getMyCertificate(function (err, cert) { | |
51 | if (err) { | |
52 | logger.error('Cannot read public cert.') | |
53 | return callback(err) | |
54 | } | |
55 | ||
56 | eachSeries(hosts, function (host, callbackEach) { | |
57 | computeForeignPodsList(host, podsScore, callbackEach) | |
58 | }, function (err) { | |
59 | if (err) return callback(err) | |
60 | ||
61 | logger.debug('Pods scores computed.', { podsScore: podsScore }) | |
62 | const podsList = computeWinningPods(hosts, podsScore) | |
63 | logger.debug('Pods that we keep.', { podsToKeep: podsList }) | |
64 | ||
65 | makeRequestsToWinningPods(cert, podsList, callback) | |
66 | }) | |
67 | }) | |
68 | } | |
69 | ||
70 | function quitFriends (callback) { | |
71 | // Stop pool requests | |
72 | Request.deactivate() | |
73 | // Flush pool requests | |
74 | Request.flush() | |
75 | ||
76 | waterfall([ | |
77 | function getPodsList (callbackAsync) { | |
78 | return Pod.list(callbackAsync) | |
79 | }, | |
80 | ||
81 | function announceIQuitMyFriends (pods, callbackAsync) { | |
82 | const requestParams = { | |
83 | method: 'POST', | |
84 | path: '/api/' + constants.API_VERSION + '/pods/remove', | |
85 | sign: true | |
86 | } | |
87 | ||
88 | // Announce we quit them | |
89 | // We don't care if the request fails | |
90 | // The other pod will exclude us automatically after a while | |
91 | eachLimit(pods, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) { | |
92 | requestParams.toPod = pod | |
93 | requests.makeSecureRequest(requestParams, callbackEach) | |
94 | }, function (err) { | |
95 | if (err) { | |
96 | logger.error('Some errors while quitting friends.', { err: err }) | |
97 | // Don't stop the process | |
98 | } | |
99 | ||
100 | return callbackAsync(null, pods) | |
101 | }) | |
102 | }, | |
103 | ||
104 | function removePodsFromDB (pods, callbackAsync) { | |
105 | each(pods, function (pod, callbackEach) { | |
106 | pod.remove(callbackEach) | |
107 | }, callbackAsync) | |
108 | } | |
109 | ], function (err) { | |
110 | // Don't forget to re activate the scheduler, even if there was an error | |
111 | Request.activate() | |
112 | ||
113 | if (err) return callback(err) | |
114 | ||
115 | logger.info('Removed all remote videos.') | |
116 | return callback(null) | |
117 | }) | |
118 | } | |
119 | ||
120 | function removeVideoToFriends (videoParams) { | |
121 | createRequest('remove', constants.REQUEST_ENDPOINTS.VIDEOS, videoParams) | |
122 | } | |
123 | ||
124 | function sendOwnedVideosToPod (podId) { | |
125 | Video.listOwned(function (err, videosList) { | |
126 | if (err) { | |
127 | logger.error('Cannot get the list of videos we own.') | |
128 | return | |
129 | } | |
130 | ||
131 | videosList.forEach(function (video) { | |
132 | video.toRemoteJSON(function (err, remoteVideo) { | |
133 | if (err) { | |
134 | logger.error('Cannot convert video to remote.', { error: err }) | |
135 | // Don't break the process | |
136 | return | |
137 | } | |
138 | ||
139 | createRequest('add', constants.REQUEST_ENDPOINTS.VIDEOS, remoteVideo, [ podId ]) | |
140 | }) | |
141 | }) | |
142 | }) | |
143 | } | |
144 | ||
145 | // --------------------------------------------------------------------------- | |
146 | ||
147 | module.exports = friends | |
148 | ||
149 | // --------------------------------------------------------------------------- | |
150 | ||
151 | function computeForeignPodsList (host, podsScore, callback) { | |
152 | getForeignPodsList(host, function (err, foreignPodsList) { | |
153 | if (err) return callback(err) | |
154 | ||
155 | if (!foreignPodsList) foreignPodsList = [] | |
156 | ||
157 | // Let's give 1 point to the pod we ask the friends list | |
158 | foreignPodsList.push({ host }) | |
159 | ||
160 | foreignPodsList.forEach(function (foreignPod) { | |
161 | const foreignPodHost = foreignPod.host | |
162 | ||
163 | if (podsScore[foreignPodHost]) podsScore[foreignPodHost]++ | |
164 | else podsScore[foreignPodHost] = 1 | |
165 | }) | |
166 | ||
167 | callback() | |
168 | }) | |
169 | } | |
170 | ||
171 | function computeWinningPods (hosts, podsScore) { | |
172 | // Build the list of pods to add | |
173 | // Only add a pod if it exists in more than a half base pods | |
174 | const podsList = [] | |
175 | const baseScore = hosts.length / 2 | |
176 | Object.keys(podsScore).forEach(function (podHost) { | |
177 | // If the pod is not me and with a good score we add it | |
178 | if (isMe(podHost) === false && podsScore[podHost] > baseScore) { | |
179 | podsList.push({ host: podHost }) | |
180 | } | |
181 | }) | |
182 | ||
183 | return podsList | |
184 | } | |
185 | ||
186 | function getForeignPodsList (host, callback) { | |
187 | const path = '/api/' + constants.API_VERSION + '/pods' | |
188 | ||
189 | request.get(constants.REMOTE_SCHEME.HTTP + '://' + host + path, function (err, response, body) { | |
190 | if (err) return callback(err) | |
191 | ||
192 | try { | |
193 | const json = JSON.parse(body) | |
194 | return callback(null, json) | |
195 | } catch (err) { | |
196 | return callback(err) | |
197 | } | |
198 | }) | |
199 | } | |
200 | ||
201 | function makeRequestsToWinningPods (cert, podsList, callback) { | |
202 | // Stop pool requests | |
203 | Request.deactivate() | |
204 | // Flush pool requests | |
205 | Request.forceSend() | |
206 | ||
207 | eachLimit(podsList, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) { | |
208 | const params = { | |
209 | url: constants.REMOTE_SCHEME.HTTP + '://' + pod.host + '/api/' + constants.API_VERSION + '/pods/', | |
210 | method: 'POST', | |
211 | json: { | |
212 | host: constants.CONFIG.WEBSERVER.HOST, | |
213 | publicKey: cert | |
214 | } | |
215 | } | |
216 | ||
217 | requests.makeRetryRequest(params, function (err, res, body) { | |
218 | if (err) { | |
219 | logger.error('Error with adding %s pod.', pod.host, { error: err }) | |
220 | // Don't break the process | |
221 | return callbackEach() | |
222 | } | |
223 | ||
224 | if (res.statusCode === 200) { | |
225 | const podObj = new Pod({ host: pod.host, publicKey: body.cert }) | |
226 | podObj.save(function (err, podCreated) { | |
227 | if (err) { | |
228 | logger.error('Cannot add friend %s pod.', pod.host, { error: err }) | |
229 | return callbackEach() | |
230 | } | |
231 | ||
232 | // Add our videos to the request scheduler | |
233 | sendOwnedVideosToPod(podCreated._id) | |
234 | ||
235 | return callbackEach() | |
236 | }) | |
237 | } else { | |
238 | logger.error('Status not 200 for %s pod.', pod.host) | |
239 | return callbackEach() | |
240 | } | |
241 | }) | |
242 | }, function endRequests () { | |
243 | // Final callback, we've ended all the requests | |
244 | // Now we made new friends, we can re activate the pool of requests | |
245 | Request.activate() | |
246 | ||
247 | logger.debug('makeRequestsToWinningPods finished.') | |
248 | return callback() | |
249 | }) | |
250 | } | |
251 | ||
252 | function createRequest (type, endpoint, data, to) { | |
253 | const req = new Request({ | |
254 | endpoint, | |
255 | request: { | |
256 | type: type, | |
257 | data: data | |
258 | } | |
259 | }) | |
260 | ||
261 | if (to) { | |
262 | req.to = to | |
263 | } | |
264 | ||
265 | req.save(function (err) { | |
266 | if (err) logger.error('Cannot save the request.', { error: err }) | |
267 | }) | |
268 | } | |
269 | ||
270 | function isMe (host) { | |
271 | return host === constants.CONFIG.WEBSERVER.HOST | |
272 | } |