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1 | 'use strict' | |
2 | ||
3 | const async = require('async') | |
4 | const config = require('config') | |
5 | const fs = require('fs') | |
6 | const request = require('request') | |
7 | ||
8 | const constants = require('../initializers/constants') | |
9 | const logger = require('../helpers/logger') | |
10 | const peertubeCrypto = require('../helpers/peertubeCrypto') | |
11 | const Pods = require('../models/pods') | |
12 | const requestsScheduler = require('../lib/requestsScheduler') | |
13 | const requests = require('../helpers/requests') | |
14 | const videos = require('../lib/videos') | |
15 | const Videos = require('../models/videos') | |
16 | ||
17 | const http = config.get('webserver.https') ? 'https' : 'http' | |
18 | const host = config.get('webserver.host') | |
19 | const port = config.get('webserver.port') | |
20 | ||
21 | const pods = { | |
22 | addVideoToFriends: addVideoToFriends, | |
23 | hasFriends: hasFriends, | |
24 | getMyCertificate: getMyCertificate, | |
25 | makeFriends: makeFriends, | |
26 | quitFriends: quitFriends, | |
27 | removeVideoToFriends: removeVideoToFriends | |
28 | } | |
29 | ||
30 | function addVideoToFriends (video) { | |
31 | // To avoid duplicates | |
32 | const id = video.name + video.magnetUri | |
33 | // ensure namePath is null | |
34 | video.namePath = null | |
35 | requestsScheduler.addRequest(id, 'add', video) | |
36 | } | |
37 | ||
38 | function hasFriends (callback) { | |
39 | Pods.count(function (err, count) { | |
40 | if (err) return callback(err) | |
41 | ||
42 | const hasFriends = (count !== 0) | |
43 | callback(null, hasFriends) | |
44 | }) | |
45 | } | |
46 | ||
47 | function getMyCertificate (callback) { | |
48 | fs.readFile(peertubeCrypto.getCertDir() + 'peertube.pub', 'utf8', callback) | |
49 | } | |
50 | ||
51 | function makeFriends (callback) { | |
52 | const podsScore = {} | |
53 | ||
54 | logger.info('Make friends!') | |
55 | getMyCertificate(function (err, cert) { | |
56 | if (err) { | |
57 | logger.error('Cannot read public cert.') | |
58 | return callback(err) | |
59 | } | |
60 | ||
61 | const urls = config.get('network.friends') | |
62 | ||
63 | async.each(urls, function (url, callbackEach) { | |
64 | computeForeignPodsList(url, podsScore, callbackEach) | |
65 | }, function (err) { | |
66 | if (err) return callback(err) | |
67 | ||
68 | logger.debug('Pods scores computed.', { podsScore: podsScore }) | |
69 | const podsList = computeWinningPods(urls, podsScore) | |
70 | logger.debug('Pods that we keep.', { podsToKeep: podsList }) | |
71 | ||
72 | makeRequestsToWinningPods(cert, podsList, callback) | |
73 | }) | |
74 | }) | |
75 | } | |
76 | ||
77 | function quitFriends (callback) { | |
78 | // Stop pool requests | |
79 | requestsScheduler.deactivate() | |
80 | // Flush pool requests | |
81 | requestsScheduler.forceSend() | |
82 | ||
83 | async.waterfall([ | |
84 | function getPodsList (callbackAsync) { | |
85 | return Pods.list(callbackAsync) | |
86 | }, | |
87 | ||
88 | function announceIQuitMyFriends (pods, callbackAsync) { | |
89 | const request = { | |
90 | method: 'POST', | |
91 | path: '/api/' + constants.API_VERSION + '/pods/remove', | |
92 | sign: true, | |
93 | encrypt: true, | |
94 | data: { | |
95 | url: 'me' // Fake data | |
96 | } | |
97 | } | |
98 | ||
99 | // Announce we quit them | |
100 | requests.makeMultipleRetryRequest(request, pods, function (err) { | |
101 | return callbackAsync(err) | |
102 | }) | |
103 | }, | |
104 | ||
105 | function removePodsFromDB (callbackAsync) { | |
106 | Pods.removeAll(function (err) { | |
107 | return callbackAsync(err) | |
108 | }) | |
109 | }, | |
110 | ||
111 | function listRemoteVideos (callbackAsync) { | |
112 | logger.info('Broke friends, so sad :(') | |
113 | ||
114 | Videos.listFromRemotes(callbackAsync) | |
115 | }, | |
116 | ||
117 | function removeTheRemoteVideos (videosList, callbackAsync) { | |
118 | videos.removeRemoteVideos(videosList, function (err) { | |
119 | if (err) { | |
120 | logger.error('Cannot remove remote videos.', { error: err }) | |
121 | return callbackAsync(err) | |
122 | } | |
123 | ||
124 | return callbackAsync(null) | |
125 | }) | |
126 | } | |
127 | ], function (err) { | |
128 | // Don't forget to re activate the scheduler, even if there was an error | |
129 | requestsScheduler.activate() | |
130 | ||
131 | if (err) return callback(err) | |
132 | ||
133 | logger.info('Removed all remote videos.') | |
134 | return callback(null) | |
135 | }) | |
136 | } | |
137 | ||
138 | function removeVideoToFriends (video) { | |
139 | // To avoid duplicates | |
140 | const id = video.name + video.magnetUri | |
141 | requestsScheduler.addRequest(id, 'remove', video) | |
142 | } | |
143 | ||
144 | // --------------------------------------------------------------------------- | |
145 | ||
146 | module.exports = pods | |
147 | ||
148 | // --------------------------------------------------------------------------- | |
149 | ||
150 | function computeForeignPodsList (url, podsScore, callback) { | |
151 | // Let's give 1 point to the pod we ask the friends list | |
152 | podsScore[url] = 1 | |
153 | ||
154 | getForeignPodsList(url, function (err, foreignPodsList) { | |
155 | if (err) return callback(err) | |
156 | if (foreignPodsList.length === 0) return callback() | |
157 | ||
158 | foreignPodsList.forEach(function (foreignPod) { | |
159 | const foreignUrl = foreignPod.url | |
160 | ||
161 | if (podsScore[foreignUrl]) podsScore[foreignUrl]++ | |
162 | else podsScore[foreignUrl] = 1 | |
163 | }) | |
164 | ||
165 | callback() | |
166 | }) | |
167 | } | |
168 | ||
169 | function computeWinningPods (urls, 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 = urls.length / 2 | |
174 | Object.keys(podsScore).forEach(function (pod) { | |
175 | if (podsScore[pod] > baseScore) podsList.push({ url: pod }) | |
176 | }) | |
177 | ||
178 | return podsList | |
179 | } | |
180 | ||
181 | function getForeignPodsList (url, callback) { | |
182 | const path = '/api/' + constants.API_VERSION + '/pods' | |
183 | ||
184 | request.get(url + path, function (err, response, body) { | |
185 | if (err) return callback(err) | |
186 | ||
187 | callback(null, JSON.parse(body)) | |
188 | }) | |
189 | } | |
190 | ||
191 | function makeRequestsToWinningPods (cert, podsList, callback) { | |
192 | // Stop pool requests | |
193 | requestsScheduler.deactivate() | |
194 | // Flush pool requests | |
195 | requestsScheduler.forceSend() | |
196 | ||
197 | // Get the list of our videos to send to our new friends | |
198 | Videos.listOwned(function (err, videosList) { | |
199 | if (err) { | |
200 | logger.error('Cannot get the list of videos we own.') | |
201 | return callback(err) | |
202 | } | |
203 | ||
204 | const data = { | |
205 | url: http + '://' + host + ':' + port, | |
206 | publicKey: cert, | |
207 | videos: videosList | |
208 | } | |
209 | ||
210 | requests.makeMultipleRetryRequest( | |
211 | { method: 'POST', path: '/api/' + constants.API_VERSION + '/pods/', data: data }, | |
212 | ||
213 | podsList, | |
214 | ||
215 | // Callback called after each request | |
216 | function eachRequest (err, response, body, url, pod, callbackEachRequest) { | |
217 | // We add the pod if it responded correctly with its public certificate | |
218 | if (!err && response.statusCode === 200) { | |
219 | Pods.add({ url: pod.url, publicKey: body.cert, score: constants.FRIEND_BASE_SCORE }, function (err) { | |
220 | if (err) { | |
221 | logger.error('Error with adding %s pod.', pod.url, { error: err }) | |
222 | return callbackEachRequest() | |
223 | } | |
224 | ||
225 | videos.createRemoteVideos(body.videos, function (err) { | |
226 | if (err) { | |
227 | logger.error('Error with adding videos of pod.', pod.url, { error: err }) | |
228 | return callbackEachRequest() | |
229 | } | |
230 | ||
231 | logger.debug('Adding remote videos from %s.', pod.url, { videos: body.videos }) | |
232 | return callbackEachRequest() | |
233 | }) | |
234 | }) | |
235 | } else { | |
236 | logger.error('Error with adding %s pod.', pod.url, { error: err || new Error('Status not 200') }) | |
237 | return callbackEachRequest() | |
238 | } | |
239 | }, | |
240 | ||
241 | // Final callback, we've ended all the requests | |
242 | function endRequests (err) { | |
243 | // Now we made new friends, we can re activate the pool of requests | |
244 | requestsScheduler.activate() | |
245 | ||
246 | if (err) { | |
247 | logger.error('There was some errors when we wanted to make friends.') | |
248 | return callback(err) | |
249 | } | |
250 | ||
251 | logger.debug('makeRequestsToWinningPods finished.') | |
252 | return callback(null) | |
253 | } | |
254 | ) | |
255 | }) | |
256 | } |