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|
;(function () {
'use strict'
var async = require('async')
var config = require('config')
var fs = require('fs')
var request = require('request')
var constants = require('./constants')
var logger = require('./logger')
var PodsDB = require('./database').PodsDB
var poolRequests = require('./poolRequests')
var utils = require('./utils')
var pods = {}
var http = config.get('webserver.https') ? 'https' : 'http'
var host = config.get('webserver.host')
var port = config.get('webserver.port')
// ----------- Private functions -----------
function getForeignPodsList (url, callback) {
var path = '/api/' + constants.API_VERSION + '/pods'
request.get(url + path, function (err, response, body) {
if (err) throw err
callback(JSON.parse(body))
})
}
// ----------- Public functions -----------
pods.list = function (callback) {
PodsDB.find(function (err, pods_list) {
if (err) {
logger.error('Cannot get the list of the pods.', { error: err })
return callback(err)
}
return callback(null, pods_list)
})
}
// { url }
pods.add = function (data, callback) {
logger.info('Adding pod: %s', data.url)
var params = {
url: data.url,
publicKey: data.publicKey,
score: constants.FRIEND_BASE_SCORE
}
PodsDB.create(params, function (err, pod) {
if (err) {
logger.error('Cannot insert the pod.', { error: err })
return callback(err)
}
fs.readFile(utils.certDir + 'peertube.pub', 'utf8', function (err, cert) {
if (err) {
logger.error('Cannot read cert file.', { error: err })
return callback(err)
}
return callback(null, { cert: cert })
})
})
}
pods.addVideoToFriends = function (video) {
// To avoid duplicates
var id = video.name + video.magnetUri
poolRequests.addToPoolRequests(id, 'add', video)
}
pods.removeVideoToFriends = function (video) {
// To avoid duplicates
var id = video.name + video.magnetUri
poolRequests.addToPoolRequests(id, 'remove', video)
}
pods.makeFriends = function (callback) {
var pods_score = {}
logger.info('Make friends!')
fs.readFile(utils.certDir + 'peertube.pub', 'utf8', function (err, cert) {
if (err) {
logger.error('Cannot read public cert.', { error: err })
return callback(err)
}
var urls = config.get('network.friends')
async.each(urls, computeForeignPodsList, function () {
logger.debug('Pods scores computed.', { pods_score: pods_score })
var pods_list = computeWinningPods(urls, pods_score)
logger.debug('Pods that we keep computed.', { pods_to_keep: pods_list })
makeRequestsToWinningPods(cert, pods_list)
})
})
// -----------------------------------------------------------------------
function computeForeignPodsList (url, callback) {
// Let's give 1 point to the pod we ask the friends list
pods_score[url] = 1
getForeignPodsList(url, function (foreign_pods_list) {
if (foreign_pods_list.length === 0) return callback()
async.each(foreign_pods_list, function (foreign_pod, callback_each) {
var foreign_url = foreign_pod.url
if (pods_score[foreign_url]) pods_score[foreign_url]++
else pods_score[foreign_url] = 1
callback_each()
}, function () {
callback()
})
})
}
function computeWinningPods (urls, pods_score) {
// Build the list of pods to add
// Only add a pod if it exists in more than a half base pods
var pods_list = []
var base_score = urls.length / 2
Object.keys(pods_score).forEach(function (pod) {
if (pods_score[pod] > base_score) pods_list.push({ url: pod })
})
return pods_list
}
function makeRequestsToWinningPods (cert, pods_list) {
var data = {
url: http + '://' + host + ':' + port,
publicKey: cert
}
utils.makeMultipleRetryRequest(
{ method: 'POST', path: '/api/' + constants.API_VERSION + '/pods/', data: data },
pods_list,
function eachRequest (err, response, body, url, pod, callback_each_request) {
// We add the pod if it responded correctly with its public certificate
if (!err && response.statusCode === 200) {
pods.add({ url: pod.url, publicKey: body.cert, score: constants.FRIEND_BASE_SCORE }, function (err) {
if (err) {
logger.error('Error with adding %s pod.', pod.url, { error: err })
}
return callback_each_request()
})
} else {
logger.error('Error with adding %s pod.', pod.url, { error: err || new Error('Status not 200') })
return callback_each_request()
}
},
function endRequests (err) {
if (err) {
logger.error('There was some errors when we wanted to make friends.', { error: err })
return callback(err)
}
logger.debug('makeRequestsToWinningPods finished.')
return callback(null)
}
)
}
}
module.exports = pods
})()
|
