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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 | pods.add = function (data, callback) { | |
47 | logger.info('Adding pod: %s', data.url) | |
48 | ||
49 | var params = { | |
50 | url: data.url, | |
51 | publicKey: data.publicKey, | |
52 | score: constants.FRIEND_BASE_SCORE | |
53 | } | |
54 | ||
55 | PodsDB.create(params, function (err, pod) { | |
56 | if (err) { | |
57 | logger.error('Cannot insert the pod.', { error: err }) | |
58 | return callback(err) | |
59 | } | |
60 | ||
61 | fs.readFile(utils.certDir + 'peertube.pub', 'utf8', function (err, cert) { | |
62 | if (err) { | |
63 | logger.error('Cannot read cert file.', { error: err }) | |
64 | return callback(err) | |
65 | } | |
66 | ||
67 | return callback(null, { cert: cert }) | |
68 | }) | |
69 | }) | |
70 | } | |
71 | ||
72 | pods.addVideoToFriends = function (video) { | |
73 | // To avoid duplicates | |
74 | var id = video.name + video.magnetUri | |
75 | poolRequests.addToPoolRequests(id, 'add', video) | |
76 | } | |
77 | ||
78 | pods.removeVideoToFriends = function (video) { | |
79 | // To avoid duplicates | |
80 | var id = video.name + video.magnetUri | |
81 | poolRequests.addToPoolRequests(id, 'remove', video) | |
82 | } | |
83 | ||
84 | pods.makeFriends = function (callback) { | |
85 | var pods_score = {} | |
86 | ||
87 | logger.info('Make friends!') | |
88 | fs.readFile(utils.certDir + 'peertube.pub', 'utf8', function (err, cert) { | |
89 | if (err) { | |
90 | logger.error('Cannot read public cert.', { error: err }) | |
91 | return callback(err) | |
92 | } | |
93 | ||
94 | var urls = config.get('network.friends') | |
95 | ||
96 | async.each(urls, computeForeignPodsList, function () { | |
97 | logger.debug('Pods scores computed.', { pods_score: pods_score }) | |
98 | var pods_list = computeWinningPods(urls, pods_score) | |
99 | logger.debug('Pods that we keep computed.', { pods_to_keep: pods_list }) | |
100 | ||
101 | makeRequestsToWinningPods(cert, pods_list) | |
102 | }) | |
103 | }) | |
104 | ||
105 | // ----------------------------------------------------------------------- | |
106 | ||
107 | function computeForeignPodsList (url, callback) { | |
108 | // Let's give 1 point to the pod we ask the friends list | |
109 | pods_score[url] = 1 | |
110 | ||
111 | getForeignPodsList(url, function (foreign_pods_list) { | |
112 | if (foreign_pods_list.length === 0) return callback() | |
113 | ||
114 | async.each(foreign_pods_list, function (foreign_pod, callback_each) { | |
115 | var foreign_url = foreign_pod.url | |
116 | ||
117 | if (pods_score[foreign_url]) pods_score[foreign_url]++ | |
118 | else pods_score[foreign_url] = 1 | |
119 | ||
120 | callback_each() | |
121 | }, function () { | |
122 | callback() | |
123 | }) | |
124 | }) | |
125 | } | |
126 | ||
127 | function computeWinningPods (urls, pods_score) { | |
128 | // Build the list of pods to add | |
129 | // Only add a pod if it exists in more than a half base pods | |
130 | var pods_list = [] | |
131 | var base_score = urls.length / 2 | |
132 | Object.keys(pods_score).forEach(function (pod) { | |
133 | if (pods_score[pod] > base_score) pods_list.push({ url: pod }) | |
134 | }) | |
135 | ||
136 | return pods_list | |
137 | } | |
138 | ||
139 | function makeRequestsToWinningPods (cert, pods_list) { | |
140 | var data = { | |
141 | url: http + '://' + host + ':' + port, | |
142 | publicKey: cert | |
143 | } | |
144 | ||
145 | utils.makeMultipleRetryRequest( | |
146 | { method: 'POST', path: '/api/' + constants.API_VERSION + '/pods/', data: data }, | |
147 | ||
148 | pods_list, | |
149 | ||
150 | function eachRequest (err, response, body, url, pod, callback_each_request) { | |
151 | // We add the pod if it responded correctly with its public certificate | |
152 | if (!err && response.statusCode === 200) { | |
153 | pods.add({ url: pod.url, publicKey: body.cert, score: constants.FRIEND_BASE_SCORE }, function (err) { | |
154 | if (err) { | |
155 | logger.error('Error with adding %s pod.', pod.url, { error: err }) | |
156 | } | |
157 | ||
158 | return callback_each_request() | |
159 | }) | |
160 | } else { | |
161 | logger.error('Error with adding %s pod.', pod.url, { error: err || new Error('Status not 200') }) | |
162 | return callback_each_request() | |
163 | } | |
164 | }, | |
165 | ||
166 | function endRequests (err) { | |
167 | if (err) { | |
168 | logger.error('There was some errors when we wanted to make friends.', { error: err }) | |
169 | return callback(err) | |
170 | } | |
171 | ||
172 | logger.debug('makeRequestsToWinningPods finished.') | |
173 | return callback(null) | |
174 | } | |
175 | ) | |
176 | } | |
177 | } | |
178 | ||
179 | module.exports = pods | |
180 | })() |