index.js•1.26 kB
'use strict'
const { LRUCache } = require('lru-cache')
const { normalizeOptions, cacheOptions } = require('./options')
const { getProxy, proxyCache } = require('./proxy.js')
const dns = require('./dns.js')
const Agent = require('./agents.js')
const agentCache = new LRUCache({ max: 20 })
const getAgent = (url, { agent, proxy, noProxy, ...options } = {}) => {
// false has meaning so this can't be a simple truthiness check
if (agent != null) {
return agent
}
url = new URL(url)
const proxyForUrl = getProxy(url, { proxy, noProxy })
const normalizedOptions = {
...normalizeOptions(options),
proxy: proxyForUrl,
}
const cacheKey = cacheOptions({
...normalizedOptions,
secureEndpoint: url.protocol === 'https:',
})
if (agentCache.has(cacheKey)) {
return agentCache.get(cacheKey)
}
const newAgent = new Agent(normalizedOptions)
agentCache.set(cacheKey, newAgent)
return newAgent
}
module.exports = {
getAgent,
Agent,
// these are exported for backwards compatability
HttpAgent: Agent,
HttpsAgent: Agent,
cache: {
proxy: proxyCache,
agent: agentCache,
dns: dns.cache,
clear: () => {
proxyCache.clear()
agentCache.clear()
dns.cache.clear()
},
},
}