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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: addVideoToFriends, | |
21 | hasFriends: hasFriends, | |
22 | getMyCertificate: getMyCertificate, | |
23 | makeFriends: makeFriends, | |
24 | quitFriends: quitFriends, | |
25 | removeVideoToFriends: removeVideoToFriends, | |
26 | sendOwnedVideosToPod: sendOwnedVideosToPod | |
27 | } | |
28 | ||
29 | function addVideoToFriends (video) { | |
30 | createRequest('add', 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 (urls, 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(urls, function (url, callbackEach) { | |
57 | computeForeignPodsList(url, podsScore, callbackEach) | |
58 | }, function (err) { | |
59 | if (err) return callback(err) | |
60 | ||
61 | logger.debug('Pods scores computed.', { podsScore: podsScore }) | |
62 | const podsList = computeWinningPods(urls, 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() | |
101 | }) | |
102 | }, | |
103 | ||
104 | function removePodsFromDB (callbackAsync) { | |
105 | Pod.removeAll(function (err) { | |
106 | return callbackAsync(err) | |
107 | }) | |
108 | }, | |
109 | ||
110 | function listRemoteVideos (callbackAsync) { | |
111 | logger.info('Broke friends, so sad :(') | |
112 | ||
113 | Video.listRemotes(callbackAsync) | |
114 | }, | |
115 | ||
116 | function removeTheRemoteVideos (videosList, callbackAsync) { | |
117 | each(videosList, function (video, callbackEach) { | |
118 | video.remove(callbackEach) | |
119 | }, callbackAsync) | |
120 | } | |
121 | ], function (err) { | |
122 | // Don't forget to re activate the scheduler, even if there was an error | |
123 | Request.activate() | |
124 | ||
125 | if (err) return callback(err) | |
126 | ||
127 | logger.info('Removed all remote videos.') | |
128 | return callback(null) | |
129 | }) | |
130 | } | |
131 | ||
132 | function removeVideoToFriends (videoParams) { | |
133 | createRequest('remove', videoParams) | |
134 | } | |
135 | ||
136 | function sendOwnedVideosToPod (podId) { | |
137 | Video.listOwned(function (err, videosList) { | |
138 | if (err) { | |
139 | logger.error('Cannot get the list of videos we own.') | |
140 | return | |
141 | } | |
142 | ||
143 | videosList.forEach(function (video) { | |
144 | video.toRemoteJSON(function (err, remoteVideo) { | |
145 | if (err) { | |
146 | logger.error('Cannot convert video to remote.', { error: err }) | |
147 | // Don't break the process | |
148 | return | |
149 | } | |
150 | ||
151 | createRequest('add', remoteVideo, [ podId ]) | |
152 | }) | |
153 | }) | |
154 | }) | |
155 | } | |
156 | ||
157 | // --------------------------------------------------------------------------- | |
158 | ||
159 | module.exports = friends | |
160 | ||
161 | // --------------------------------------------------------------------------- | |
162 | ||
163 | function computeForeignPodsList (url, podsScore, callback) { | |
164 | getForeignPodsList(url, function (err, foreignPodsList) { | |
165 | if (err) return callback(err) | |
166 | ||
167 | if (!foreignPodsList) foreignPodsList = [] | |
168 | ||
169 | // Let's give 1 point to the pod we ask the friends list | |
170 | foreignPodsList.push({ url: url }) | |
171 | ||
172 | foreignPodsList.forEach(function (foreignPod) { | |
173 | const foreignPodUrl = foreignPod.url | |
174 | ||
175 | if (podsScore[foreignPodUrl]) podsScore[foreignPodUrl]++ | |
176 | else podsScore[foreignPodUrl] = 1 | |
177 | }) | |
178 | ||
179 | callback() | |
180 | }) | |
181 | } | |
182 | ||
183 | function computeWinningPods (urls, podsScore) { | |
184 | // Build the list of pods to add | |
185 | // Only add a pod if it exists in more than a half base pods | |
186 | const podsList = [] | |
187 | const baseScore = urls.length / 2 | |
188 | Object.keys(podsScore).forEach(function (pod) { | |
189 | if (podsScore[pod] > baseScore) podsList.push({ url: pod }) | |
190 | }) | |
191 | ||
192 | return podsList | |
193 | } | |
194 | ||
195 | function getForeignPodsList (url, callback) { | |
196 | const path = '/api/' + constants.API_VERSION + '/pods' | |
197 | ||
198 | request.get(url + path, function (err, response, body) { | |
199 | if (err) return callback(err) | |
200 | ||
201 | try { | |
202 | const json = JSON.parse(body) | |
203 | return callback(null, json) | |
204 | } catch (err) { | |
205 | return callback(err) | |
206 | } | |
207 | }) | |
208 | } | |
209 | ||
210 | function makeRequestsToWinningPods (cert, podsList, callback) { | |
211 | // Stop pool requests | |
212 | Request.deactivate() | |
213 | // Flush pool requests | |
214 | Request.forceSend() | |
215 | ||
216 | eachLimit(podsList, constants.REQUESTS_IN_PARALLEL, function (pod, callbackEach) { | |
217 | const params = { | |
218 | url: pod.url + '/api/' + constants.API_VERSION + '/pods/', | |
219 | method: 'POST', | |
220 | json: { | |
221 | url: constants.CONFIG.WEBSERVER.URL, | |
222 | publicKey: cert | |
223 | } | |
224 | } | |
225 | ||
226 | requests.makeRetryRequest(params, function (err, res, body) { | |
227 | if (err) { | |
228 | logger.error('Error with adding %s pod.', pod.url, { error: err }) | |
229 | // Don't break the process | |
230 | return callbackEach() | |
231 | } | |
232 | ||
233 | if (res.statusCode === 200) { | |
234 | const podObj = new Pod({ url: pod.url, publicKey: body.cert }) | |
235 | podObj.save(function (err, podCreated) { | |
236 | if (err) { | |
237 | logger.error('Cannot add friend %s pod.', pod.url, { error: err }) | |
238 | return callbackEach() | |
239 | } | |
240 | ||
241 | // Add our videos to the request scheduler | |
242 | sendOwnedVideosToPod(podCreated._id) | |
243 | ||
244 | return callbackEach() | |
245 | }) | |
246 | } else { | |
247 | logger.error('Status not 200 for %s pod.', pod.url) | |
248 | return callbackEach() | |
249 | } | |
250 | }) | |
251 | }, function endRequests () { | |
252 | // Final callback, we've ended all the requests | |
253 | // Now we made new friends, we can re activate the pool of requests | |
254 | Request.activate() | |
255 | ||
256 | logger.debug('makeRequestsToWinningPods finished.') | |
257 | return callback() | |
258 | }) | |
259 | } | |
260 | ||
261 | function createRequest (type, data, to) { | |
262 | const req = new Request({ | |
263 | request: { | |
264 | type: type, | |
265 | data: data | |
266 | } | |
267 | }) | |
268 | ||
269 | if (to) { | |
270 | req.to = to | |
271 | } | |
272 | ||
273 | req.save(function (err) { | |
274 | if (err) logger.error('Cannot save the request.', { error: err }) | |
275 | }) | |
276 | } |