PeerTube/server/models/request.js

349 lines
9.4 KiB
JavaScript

'use strict'
const each = require('async/each')
const eachLimit = require('async/eachLimit')
const waterfall = require('async/waterfall')
const values = require('lodash/values')
const constants = require('../initializers/constants')
const logger = require('../helpers/logger')
const requests = require('../helpers/requests')
let timer = null
let lastRequestTimestamp = 0
// ---------------------------------------------------------------------------
module.exports = function (sequelize, DataTypes) {
const Request = sequelize.define('Request',
{
request: {
type: DataTypes.JSON,
allowNull: false
},
endpoint: {
type: DataTypes.ENUM(values(constants.REQUEST_ENDPOINTS)),
allowNull: false
}
},
{
classMethods: {
associate,
activate,
countTotalRequests,
deactivate,
flush,
forceSend,
remainingMilliSeconds
}
}
)
return Request
}
// ------------------------------ STATICS ------------------------------
function associate (models) {
this.belongsToMany(models.Pod, {
foreignKey: {
name: 'requestId',
allowNull: false
},
through: models.RequestToPod,
onDelete: 'CASCADE'
})
}
function activate () {
logger.info('Requests scheduler activated.')
lastRequestTimestamp = Date.now()
const self = this
timer = setInterval(function () {
lastRequestTimestamp = Date.now()
makeRequests.call(self)
}, constants.REQUESTS_INTERVAL)
}
function countTotalRequests (callback) {
const query = {
include: [ this.sequelize.models.Pod ]
}
return this.count(query).asCallback(callback)
}
function deactivate () {
logger.info('Requests scheduler deactivated.')
clearInterval(timer)
timer = null
}
function flush (callback) {
removeAll.call(this, function (err) {
if (err) logger.error('Cannot flush the requests.', { error: err })
return callback(err)
})
}
function forceSend () {
logger.info('Force requests scheduler sending.')
makeRequests.call(this)
}
function remainingMilliSeconds () {
if (timer === null) return -1
return constants.REQUESTS_INTERVAL - (Date.now() - lastRequestTimestamp)
}
// ---------------------------------------------------------------------------
// Make a requests to friends of a certain type
function makeRequest (toPod, requestEndpoint, requestsToMake, callback) {
if (!callback) callback = function () {}
const params = {
toPod: toPod,
sign: true, // Prove our identity
method: 'POST',
path: '/api/' + constants.API_VERSION + '/remote/' + requestEndpoint,
data: requestsToMake // Requests we need to make
}
// Make multiple retry requests to all of pods
// The function fire some useful callbacks
requests.makeSecureRequest(params, function (err, res) {
if (err || (res.statusCode !== 200 && res.statusCode !== 201 && res.statusCode !== 204)) {
logger.error(
'Error sending secure request to %s pod.',
toPod.host,
{
error: err ? err.message : 'Status code not 20x : ' + res.statusCode
}
)
return callback(false)
}
return callback(true)
})
}
// Make all the requests of the scheduler
function makeRequests () {
const self = this
const RequestToPod = this.sequelize.models.RequestToPod
// We limit the size of the requests
// We don't want to stuck with the same failing requests so we get a random list
listWithLimitAndRandom.call(self, constants.REQUESTS_LIMIT_PODS, constants.REQUESTS_LIMIT_PER_POD, function (err, requests) {
if (err) {
logger.error('Cannot get the list of requests.', { err: err })
return // Abort
}
// If there are no requests, abort
if (requests.length === 0) {
logger.info('No requests to make.')
return
}
// We want to group requests by destinations pod and endpoint
const requestsToMakeGrouped = {}
Object.keys(requests).forEach(function (toPodId) {
requests[toPodId].forEach(function (data) {
const request = data.request
const pod = data.pod
const hashKey = toPodId + request.endpoint
if (!requestsToMakeGrouped[hashKey]) {
requestsToMakeGrouped[hashKey] = {
toPod: pod,
endpoint: request.endpoint,
ids: [], // request ids, to delete them from the DB in the future
datas: [] // requests data,
}
}
requestsToMakeGrouped[hashKey].ids.push(request.id)
requestsToMakeGrouped[hashKey].datas.push(request.request)
})
})
logger.info('Making requests to friends.')
const goodPods = []
const badPods = []
eachLimit(Object.keys(requestsToMakeGrouped), constants.REQUESTS_IN_PARALLEL, function (hashKey, callbackEach) {
const requestToMake = requestsToMakeGrouped[hashKey]
const toPod = requestToMake.toPod
// Maybe the pod is not our friend anymore so simply remove it
if (!toPod) {
const requestIdsToDelete = requestToMake.ids
logger.info('Removing %d requests of unexisting pod %s.', requestIdsToDelete.length, requestToMake.toPod.id)
RequestToPod.removePodOf.call(self, requestIdsToDelete, requestToMake.toPod.id)
return callbackEach()
}
makeRequest(toPod, requestToMake.endpoint, requestToMake.datas, function (success) {
if (success === true) {
logger.debug('Removing requests for pod %s.', requestToMake.toPod.id, { requestsIds: requestToMake.ids })
goodPods.push(requestToMake.toPod.id)
// Remove the pod id of these request ids
RequestToPod.removePodOf(requestToMake.ids, requestToMake.toPod.id, callbackEach)
} else {
badPods.push(requestToMake.toPod.id)
callbackEach()
}
})
}, function () {
// All the requests were made, we update the pods score
updatePodsScore.call(self, goodPods, badPods)
// Flush requests with no pod
removeWithEmptyTo.call(self, function (err) {
if (err) logger.error('Error when removing requests with no pods.', { error: err })
})
})
})
}
// Remove pods with a score of 0 (too many requests where they were unreachable)
function removeBadPods () {
const self = this
waterfall([
function findBadPods (callback) {
self.sequelize.models.Pod.listBadPods(function (err, pods) {
if (err) {
logger.error('Cannot find bad pods.', { error: err })
return callback(err)
}
return callback(null, pods)
})
},
function removeTheseBadPods (pods, callback) {
each(pods, function (pod, callbackEach) {
pod.destroy().asCallback(callbackEach)
}, function (err) {
return callback(err, pods.length)
})
}
], function (err, numberOfPodsRemoved) {
if (err) {
logger.error('Cannot remove bad pods.', { error: err })
} else if (numberOfPodsRemoved) {
logger.info('Removed %d pods.', numberOfPodsRemoved)
} else {
logger.info('No need to remove bad pods.')
}
})
}
function updatePodsScore (goodPods, badPods) {
const self = this
const Pod = this.sequelize.models.Pod
logger.info('Updating %d good pods and %d bad pods scores.', goodPods.length, badPods.length)
if (goodPods.length !== 0) {
Pod.incrementScores(goodPods, constants.PODS_SCORE.BONUS, function (err) {
if (err) logger.error('Cannot increment scores of good pods.', { error: err })
})
}
if (badPods.length !== 0) {
Pod.incrementScores(badPods, constants.PODS_SCORE.MALUS, function (err) {
if (err) logger.error('Cannot decrement scores of bad pods.', { error: err })
removeBadPods.call(self)
})
}
}
function listWithLimitAndRandom (limitPods, limitRequestsPerPod, callback) {
const self = this
const Pod = this.sequelize.models.Pod
Pod.listRandomPodIdsWithRequest(limitPods, function (err, podIds) {
if (err) return callback(err)
// We don't have friends that have requests
if (podIds.length === 0) return callback(null, [])
// The the first x requests of these pods
// It is very important to sort by id ASC to keep the requests order!
const query = {
order: [
[ 'id', 'ASC' ]
],
include: [
{
model: self.sequelize.models.Pod,
where: {
id: {
$in: podIds
}
}
}
]
}
self.findAll(query).asCallback(function (err, requests) {
if (err) return callback(err)
const requestsGrouped = groupAndTruncateRequests(requests, limitRequestsPerPod)
return callback(err, requestsGrouped)
})
})
}
function groupAndTruncateRequests (requests, limitRequestsPerPod) {
const requestsGrouped = {}
requests.forEach(function (request) {
request.Pods.forEach(function (pod) {
if (!requestsGrouped[pod.id]) requestsGrouped[pod.id] = []
if (requestsGrouped[pod.id].length < limitRequestsPerPod) {
requestsGrouped[pod.id].push({
request,
pod
})
}
})
})
return requestsGrouped
}
function removeAll (callback) {
// Delete all requests
this.truncate({ cascade: true }).asCallback(callback)
}
function removeWithEmptyTo (callback) {
if (!callback) callback = function () {}
const query = {
where: {
id: {
$notIn: [
this.sequelize.literal('SELECT "requestId" FROM "RequestToPods"')
]
}
}
}
this.destroy(query).asCallback(callback)
}