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1 | ;(function () { | |
2 | 'use strict' | |
3 | ||
4 | var async = require('async') | |
5 | var config = require('config') | |
6 | var fs = require('fs') | |
7 | var request = require('request') | |
8 | ||
9 | var constants = require('./constants') | |
10 | var logger = require('./logger') | |
11 | var PodsDB = require('./database').PodsDB | |
12 | var poolRequests = require('./poolRequests') | |
13 | var utils = require('./utils') | |
14 | ||
15 | var pods = {} | |
16 | ||
17 | var http = config.get('webserver.https') ? 'https' : 'http' | |
18 | var host = config.get('webserver.host') | |
19 | var port = config.get('webserver.port') | |
20 | ||
21 | // ----------- Private functions ----------- | |
22 | ||
23 | function getForeignPodsList (url, callback) { | |
24 | var path = '/api/' + constants.API_VERSION + '/pods' | |
25 | ||
26 | request.get(url + path, function (err, response, body) { | |
27 | if (err) throw err | |
28 | callback(JSON.parse(body)) | |
29 | }) | |
30 | } | |
31 | ||
32 | // ----------- Public functions ----------- | |
33 | ||
34 | pods.list = function (callback) { | |
35 | PodsDB.find(function (err, pods_list) { | |
36 | if (err) { | |
37 | logger.error('Cannot get the list of the pods.', { error: err }) | |
38 | return callback(err) | |
39 | } | |
40 | ||
41 | return callback(null, pods_list) | |
42 | }) | |
43 | } | |
44 | ||
45 | // { url } | |
46 | // TODO: check if the pod is not already a friend | |
47 | pods.add = function (data, callback) { | |
48 | var videos = require('./videos') | |
49 | logger.info('Adding pod: %s', data.url) | |
50 | ||
51 | var params = { | |
52 | url: data.url, | |
53 | publicKey: data.publicKey, | |
54 | score: constants.FRIEND_BASE_SCORE | |
55 | } | |
56 | ||
57 | PodsDB.create(params, function (err, pod) { | |
58 | if (err) { | |
59 | logger.error('Cannot insert the pod.', { error: err }) | |
60 | return callback(err) | |
61 | } | |
62 | ||
63 | videos.addRemotes(data.videos) | |
64 | ||
65 | fs.readFile(utils.certDir + 'peertube.pub', 'utf8', function (err, cert) { | |
66 | if (err) { | |
67 | logger.error('Cannot read cert file.', { error: err }) | |
68 | return callback(err) | |
69 | } | |
70 | ||
71 | videos.listOwned(function (err, videos_list) { | |
72 | if (err) { | |
73 | logger.error('Cannot get the list of owned videos.', { error: err }) | |
74 | return callback(err) | |
75 | } | |
76 | ||
77 | return callback(null, { cert: cert, videos: videos_list }) | |
78 | }) | |
79 | }) | |
80 | }) | |
81 | } | |
82 | ||
83 | pods.remove = function (url, callback) { | |
84 | var videos = require('./videos') | |
85 | logger.info('Removing %s pod.', url) | |
86 | ||
87 | videos.removeAllRemotesOf(url, function (err) { | |
88 | if (err) logger.error('Cannot remove all remote videos of %s.', url) | |
89 | ||
90 | PodsDB.remove({ url: url }, function (err) { | |
91 | if (err) return callback(err) | |
92 | ||
93 | logger.info('%s pod removed.', url) | |
94 | callback(null) | |
95 | }) | |
96 | }) | |
97 | } | |
98 | ||
99 | pods.addVideoToFriends = function (video) { | |
100 | // To avoid duplicates | |
101 | var id = video.name + video.magnetUri | |
102 | poolRequests.addToPoolRequests(id, 'add', video) | |
103 | } | |
104 | ||
105 | pods.removeVideoToFriends = function (video) { | |
106 | // To avoid duplicates | |
107 | var id = video.name + video.magnetUri | |
108 | poolRequests.addToPoolRequests(id, 'remove', video) | |
109 | } | |
110 | ||
111 | pods.makeFriends = function (callback) { | |
112 | var videos = require('./videos') | |
113 | var pods_score = {} | |
114 | ||
115 | logger.info('Make friends!') | |
116 | fs.readFile(utils.certDir + 'peertube.pub', 'utf8', function (err, cert) { | |
117 | if (err) { | |
118 | logger.error('Cannot read public cert.', { error: err }) | |
119 | return callback(err) | |
120 | } | |
121 | ||
122 | var urls = config.get('network.friends') | |
123 | ||
124 | async.each(urls, computeForeignPodsList, function () { | |
125 | logger.debug('Pods scores computed.', { pods_score: pods_score }) | |
126 | var pods_list = computeWinningPods(urls, pods_score) | |
127 | logger.debug('Pods that we keep computed.', { pods_to_keep: pods_list }) | |
128 | ||
129 | makeRequestsToWinningPods(cert, pods_list) | |
130 | }) | |
131 | }) | |
132 | ||
133 | // ----------------------------------------------------------------------- | |
134 | ||
135 | function computeForeignPodsList (url, callback) { | |
136 | // Let's give 1 point to the pod we ask the friends list | |
137 | pods_score[url] = 1 | |
138 | ||
139 | getForeignPodsList(url, function (foreign_pods_list) { | |
140 | if (foreign_pods_list.length === 0) return callback() | |
141 | ||
142 | async.each(foreign_pods_list, function (foreign_pod, callback_each) { | |
143 | var foreign_url = foreign_pod.url | |
144 | ||
145 | if (pods_score[foreign_url]) pods_score[foreign_url]++ | |
146 | else pods_score[foreign_url] = 1 | |
147 | ||
148 | callback_each() | |
149 | }, function () { | |
150 | callback() | |
151 | }) | |
152 | }) | |
153 | } | |
154 | ||
155 | function computeWinningPods (urls, pods_score) { | |
156 | // Build the list of pods to add | |
157 | // Only add a pod if it exists in more than a half base pods | |
158 | var pods_list = [] | |
159 | var base_score = urls.length / 2 | |
160 | Object.keys(pods_score).forEach(function (pod) { | |
161 | if (pods_score[pod] > base_score) pods_list.push({ url: pod }) | |
162 | }) | |
163 | ||
164 | return pods_list | |
165 | } | |
166 | ||
167 | function makeRequestsToWinningPods (cert, pods_list) { | |
168 | // Stop pool requests | |
169 | poolRequests.deactivate() | |
170 | // Flush pool requests | |
171 | poolRequests.forceSend() | |
172 | ||
173 | // Get the list of our videos to send to our new friends | |
174 | videos.listOwned(function (err, videos_list) { | |
175 | if (err) throw err | |
176 | ||
177 | var data = { | |
178 | url: http + '://' + host + ':' + port, | |
179 | publicKey: cert, | |
180 | videos: videos_list | |
181 | } | |
182 | ||
183 | utils.makeMultipleRetryRequest( | |
184 | { method: 'POST', path: '/api/' + constants.API_VERSION + '/pods/', data: data }, | |
185 | ||
186 | pods_list, | |
187 | ||
188 | function eachRequest (err, response, body, url, pod, callback_each_request) { | |
189 | // We add the pod if it responded correctly with its public certificate | |
190 | if (!err && response.statusCode === 200) { | |
191 | pods.add({ url: pod.url, publicKey: body.cert, score: constants.FRIEND_BASE_SCORE }, function (err) { | |
192 | if (err) logger.error('Error with adding %s pod.', pod.url, { error: err }) | |
193 | ||
194 | videos.addRemotes(body.videos, function (err) { | |
195 | if (err) logger.error('Error with adding videos of pod.', pod.url, { error: err }) | |
196 | ||
197 | logger.debug('Adding remote videos from %s.', pod.url, { videos: body.videos }) | |
198 | return callback_each_request() | |
199 | }) | |
200 | }) | |
201 | } else { | |
202 | logger.error('Error with adding %s pod.', pod.url, { error: err || new Error('Status not 200') }) | |
203 | return callback_each_request() | |
204 | } | |
205 | }, | |
206 | ||
207 | function endRequests (err) { | |
208 | // Now we made new friends, we can re activate the pool of requests | |
209 | poolRequests.activate() | |
210 | ||
211 | if (err) { | |
212 | logger.error('There was some errors when we wanted to make friends.', { error: err }) | |
213 | return callback(err) | |
214 | } | |
215 | ||
216 | logger.debug('makeRequestsToWinningPods finished.') | |
217 | return callback(null) | |
218 | } | |
219 | ) | |
220 | }) | |
221 | } | |
222 | } | |
223 | ||
224 | pods.quitFriends = function (callback) { | |
225 | // Stop pool requests | |
226 | poolRequests.deactivate() | |
227 | // Flush pool requests | |
228 | poolRequests.forceSend() | |
229 | ||
230 | PodsDB.find(function (err, pods) { | |
231 | if (err) return callback(err) | |
232 | ||
233 | var request = { | |
234 | method: 'POST', | |
235 | path: '/api/' + constants.API_VERSION + '/pods/remove', | |
236 | sign: true, | |
237 | encrypt: true, | |
238 | data: { | |
239 | url: 'me' // Fake data | |
240 | } | |
241 | } | |
242 | ||
243 | // Announce we quit them | |
244 | utils.makeMultipleRetryRequest(request, pods, function () { | |
245 | PodsDB.remove(function (err) { | |
246 | poolRequests.activate() | |
247 | ||
248 | if (err) return callback(err) | |
249 | ||
250 | logger.info('Broke friends, so sad :(') | |
251 | ||
252 | var videos = require('./videos') | |
253 | videos.removeAllRemotes(function (err) { | |
254 | if (err) return callback(err) | |
255 | ||
256 | logger.info('Removed all remote videos.') | |
257 | callback(null) | |
258 | }) | |
259 | }) | |
260 | }) | |
261 | }) | |
262 | } | |
263 | ||
264 | pods.hasFriends = function (callback) { | |
265 | PodsDB.count(function (err, count) { | |
266 | if (err) return callback(err) | |
267 | ||
268 | var has_friends = (count !== 0) | |
269 | callback(null, has_friends) | |
270 | }) | |
271 | } | |
272 | ||
273 | module.exports = pods | |
274 | })() |