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server: Improve style of announce/filter logic

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- Filter before potentially creating a swarm that is not needed
- Unify getSwarm()/createSwarm() into a getOrCreateSwarm() function
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Feross Aboukhadijeh 2018-04-29 21:17:57 -07:00 committed by GitHub
parent c98c40abe5
commit 65c02dd153
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1 changed files with 23 additions and 19 deletions
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38
server.js
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@ -657,29 +657,33 @@ Server.prototype._onRequest = function (params, cb) {
Server.prototype._onAnnounce = function (params, cb) {
var self = this
self.getSwarm(params.info_hash, function (err, swarm) {
if (err) return cb(err)
if (self._filter) {
self._filter(params.info_hash, params, function (err) {
// Precense of err means that this torrent or user is disallowd
if (err) cb(err)
else {
if (swarm) announce(swarm)
else createSwarm()
}
})
} else {
if (swarm) announce(swarm)
else createSwarm()
}
})
// Presence of `err` means that this announce request is disallowed
if (err) return cb(err)
function createSwarm () {
self.createSwarm(params.info_hash, function (err, swarm) {
getOrCreateSwarm(function (err, swarm) {
if (err) return cb(err)
announce(swarm)
})
})
} else {
getOrCreateSwarm(function (err, swarm) {
if (err) return cb(err)
announce(swarm)
})
}
// Get existing swarm, or create one if one does not exist
function getOrCreateSwarm (cb) {
self.getSwarm(params.info_hash, function (err, swarm) {
if (err) return cb(err)
if (swarm) return cb(null, swarm)
self.createSwarm(params.info_hash, function (err, swarm) {
if (err) return cb(err)
cb(null, swarm)
})
})
}
function announce (swarm) {