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