File size: 3,071 Bytes
abfcf57 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | 'use strict'
const {
PoolBase,
kClients,
kNeedDrain,
kAddClient,
kGetDispatcher
} = require('./pool-base')
const Client = require('./client')
const {
InvalidArgumentError
} = require('./core/errors')
const util = require('./core/util')
const { kUrl, kInterceptors } = require('./core/symbols')
const buildConnector = require('./core/connect')
const kOptions = Symbol('options')
const kConnections = Symbol('connections')
const kFactory = Symbol('factory')
function defaultFactory (origin, opts) {
return new Client(origin, opts)
}
class Pool extends PoolBase {
constructor (origin, {
connections,
factory = defaultFactory,
connect,
connectTimeout,
tls,
maxCachedSessions,
socketPath,
autoSelectFamily,
autoSelectFamilyAttemptTimeout,
allowH2,
...options
} = {}) {
super()
if (connections != null && (!Number.isFinite(connections) || connections < 0)) {
throw new InvalidArgumentError('invalid connections')
}
if (typeof factory !== 'function') {
throw new InvalidArgumentError('factory must be a function.')
}
if (connect != null && typeof connect !== 'function' && typeof connect !== 'object') {
throw new InvalidArgumentError('connect must be a function or an object')
}
if (typeof connect !== 'function') {
connect = buildConnector({
...tls,
maxCachedSessions,
allowH2,
socketPath,
timeout: connectTimeout,
...(util.nodeHasAutoSelectFamily && autoSelectFamily ? { autoSelectFamily, autoSelectFamilyAttemptTimeout } : undefined),
...connect
})
}
this[kInterceptors] = options.interceptors && options.interceptors.Pool && Array.isArray(options.interceptors.Pool)
? options.interceptors.Pool
: []
this[kConnections] = connections || null
this[kUrl] = util.parseOrigin(origin)
this[kOptions] = { ...util.deepClone(options), connect, allowH2 }
this[kOptions].interceptors = options.interceptors
? { ...options.interceptors }
: undefined
this[kFactory] = factory
this.on('connectionError', (origin, targets, error) => {
// If a connection error occurs, we remove the client from the pool,
// and emit a connectionError event. They will not be re-used.
// Fixes https://github.com/nodejs/undici/issues/3895
for (const target of targets) {
// Do not use kRemoveClient here, as it will close the client,
// but the client cannot be closed in this state.
const idx = this[kClients].indexOf(target)
if (idx !== -1) {
this[kClients].splice(idx, 1)
}
}
})
}
[kGetDispatcher] () {
let dispatcher = this[kClients].find(dispatcher => !dispatcher[kNeedDrain])
if (dispatcher) {
return dispatcher
}
if (!this[kConnections] || this[kClients].length < this[kConnections]) {
dispatcher = this[kFactory](this[kUrl], this[kOptions])
this[kAddClient](dispatcher)
}
return dispatcher
}
}
module.exports = Pool
|