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1 | 'use strict' | |
2 | ||
3 | const config = require('config') | |
4 | const each = require('async/each') | |
5 | const eachLimit = require('async/eachLimit') | |
6 | const eachSeries = require('async/eachSeries') | |
7 | const fs = require('fs') | |
8 | const mongoose = require('mongoose') | |
9 | const request = require('request') | |
10 | const waterfall = require('async/waterfall') | |
11 | ||
12 | const constants = require('../initializers/constants') | |
13 | const logger = require('../helpers/logger') | |
14 | const peertubeCrypto = require('../helpers/peertube-crypto') | |
15 | const requests = require('../helpers/requests') | |
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 | const Pod = mongoose.model('Pod') | |
21 | const Request = mongoose.model('Request') | |
22 | const Video = mongoose.model('Video') | |
23 | ||
24 | const friends = { | |
25 | addVideoToFriends: addVideoToFriends, | |
26 | hasFriends: hasFriends, | |
27 | getMyCertificate: getMyCertificate, | |
28 | makeFriends: makeFriends, | |
29 | quitFriends: quitFriends, | |
30 | removeVideoToFriends: removeVideoToFriends, | |
31 | sendOwnedVideosToPod: sendOwnedVideosToPod | |
32 | } | |
33 | ||
34 | function addVideoToFriends (video) { | |
35 | createRequest('add', video) | |
36 | } | |
37 | ||
38 | function hasFriends (callback) { | |
39 | Pod.countAll(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 | eachSeries(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 | Request.deactivate() | |
80 | // Flush pool requests | |
81 | Request.flush() | |
82 | ||
83 | waterfall([ | |
84 | function getPodsList (callbackAsync) { | |
85 | return Pod.list(callbackAsync) | |
86 | }, | |
87 | ||
88 | function announceIQuitMyFriends (pods, callbackAsync) { | |
89 | const requestParams = { | |
90 | method: 'POST', | |
91 | path: '/api/' + constants.API_VERSION + '/pods/remove', | |
92 | sign: true | |
93 | } | |
94 | ||
95 | // Announce we quit them | |
96 | // We don't care if the request fails | |
97 | // The other pod will exclude us automatically after a while | |
98 | eachLimit(pods, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) { | |
99 | requestParams.toPod = pod | |
100 | requests.makeSecureRequest(requestParams, callbackEach) | |
101 | }, function (err) { | |
102 | if (err) { | |
103 | logger.error('Some errors while quitting friends.', { err: err }) | |
104 | // Don't stop the process | |
105 | } | |
106 | ||
107 | return callbackAsync() | |
108 | }) | |
109 | }, | |
110 | ||
111 | function removePodsFromDB (callbackAsync) { | |
112 | Pod.removeAll(function (err) { | |
113 | return callbackAsync(err) | |
114 | }) | |
115 | }, | |
116 | ||
117 | function listRemoteVideos (callbackAsync) { | |
118 | logger.info('Broke friends, so sad :(') | |
119 | ||
120 | Video.listRemotes(callbackAsync) | |
121 | }, | |
122 | ||
123 | function removeTheRemoteVideos (videosList, callbackAsync) { | |
124 | each(videosList, function (video, callbackEach) { | |
125 | video.remove(callbackEach) | |
126 | }, callbackAsync) | |
127 | } | |
128 | ], function (err) { | |
129 | // Don't forget to re activate the scheduler, even if there was an error | |
130 | Request.activate() | |
131 | ||
132 | if (err) return callback(err) | |
133 | ||
134 | logger.info('Removed all remote videos.') | |
135 | return callback(null) | |
136 | }) | |
137 | } | |
138 | ||
139 | function removeVideoToFriends (videoParams) { | |
140 | createRequest('remove', videoParams) | |
141 | } | |
142 | ||
143 | function sendOwnedVideosToPod (podId) { | |
144 | Video.listOwned(function (err, videosList) { | |
145 | if (err) { | |
146 | logger.error('Cannot get the list of videos we own.') | |
147 | return | |
148 | } | |
149 | ||
150 | videosList.forEach(function (video) { | |
151 | video.toRemoteJSON(function (err, remoteVideo) { | |
152 | if (err) { | |
153 | logger.error('Cannot convert video to remote.', { error: err }) | |
154 | // Don't break the process | |
155 | return | |
156 | } | |
157 | ||
158 | createRequest('add', remoteVideo, [ podId ]) | |
159 | }) | |
160 | }) | |
161 | }) | |
162 | } | |
163 | ||
164 | // --------------------------------------------------------------------------- | |
165 | ||
166 | module.exports = friends | |
167 | ||
168 | // --------------------------------------------------------------------------- | |
169 | ||
170 | function computeForeignPodsList (url, podsScore, callback) { | |
171 | getForeignPodsList(url, function (err, foreignPodsList) { | |
172 | if (err) return callback(err) | |
173 | ||
174 | if (!foreignPodsList) foreignPodsList = [] | |
175 | ||
176 | // Let's give 1 point to the pod we ask the friends list | |
177 | foreignPodsList.push({ url: url }) | |
178 | ||
179 | foreignPodsList.forEach(function (foreignPod) { | |
180 | const foreignPodUrl = foreignPod.url | |
181 | ||
182 | if (podsScore[foreignPodUrl]) podsScore[foreignPodUrl]++ | |
183 | else podsScore[foreignPodUrl] = 1 | |
184 | }) | |
185 | ||
186 | callback() | |
187 | }) | |
188 | } | |
189 | ||
190 | function computeWinningPods (urls, podsScore) { | |
191 | // Build the list of pods to add | |
192 | // Only add a pod if it exists in more than a half base pods | |
193 | const podsList = [] | |
194 | const baseScore = urls.length / 2 | |
195 | Object.keys(podsScore).forEach(function (pod) { | |
196 | if (podsScore[pod] > baseScore) podsList.push({ url: pod }) | |
197 | }) | |
198 | ||
199 | return podsList | |
200 | } | |
201 | ||
202 | function getForeignPodsList (url, callback) { | |
203 | const path = '/api/' + constants.API_VERSION + '/pods' | |
204 | ||
205 | request.get(url + path, function (err, response, body) { | |
206 | if (err) return callback(err) | |
207 | ||
208 | callback(null, JSON.parse(body)) | |
209 | }) | |
210 | } | |
211 | ||
212 | function makeRequestsToWinningPods (cert, podsList, callback) { | |
213 | // Stop pool requests | |
214 | Request.deactivate() | |
215 | // Flush pool requests | |
216 | Request.forceSend() | |
217 | ||
218 | eachLimit(podsList, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) { | |
219 | const params = { | |
220 | url: pod.url + '/api/' + constants.API_VERSION + '/pods/', | |
221 | method: 'POST', | |
222 | json: { | |
223 | url: http + '://' + host + ':' + port, | |
224 | publicKey: cert | |
225 | } | |
226 | } | |
227 | ||
228 | requests.makeRetryRequest(params, function (err, res, body) { | |
229 | if (err) { | |
230 | logger.error('Error with adding %s pod.', pod.url, { error: err }) | |
231 | // Don't break the process | |
232 | return callbackEach() | |
233 | } | |
234 | ||
235 | if (res.statusCode === 200) { | |
236 | const podObj = new Pod({ url: pod.url, publicKey: body.cert }) | |
237 | podObj.save(function (err, podCreated) { | |
238 | if (err) { | |
239 | logger.error('Cannot add friend %s pod.', pod.url, { error: err }) | |
240 | return callbackEach() | |
241 | } | |
242 | ||
243 | // Add our videos to the request scheduler | |
244 | sendOwnedVideosToPod(podCreated._id) | |
245 | ||
246 | return callbackEach() | |
247 | }) | |
248 | } else { | |
249 | logger.error('Status not 200 for %s pod.', pod.url) | |
250 | return callbackEach() | |
251 | } | |
252 | }) | |
253 | }, function endRequests () { | |
254 | // Final callback, we've ended all the requests | |
255 | // Now we made new friends, we can re activate the pool of requests | |
256 | Request.activate() | |
257 | ||
258 | logger.debug('makeRequestsToWinningPods finished.') | |
259 | return callback() | |
260 | }) | |
261 | } | |
262 | ||
263 | function createRequest (type, data, to) { | |
264 | const req = new Request({ | |
265 | request: { | |
266 | type: type, | |
267 | data: data | |
268 | } | |
269 | }) | |
270 | ||
271 | if (to) { | |
272 | req.to = to | |
273 | } | |
274 | ||
275 | req.save(function (err) { | |
276 | if (err) logger.error('Cannot save the request.', { error: err }) | |
277 | }) | |
278 | } |