update

package/node_modules/@npmcli/agent/lib/proxy.js

@@ -0,0 +1,88 @@
+'use strict'
+
+const { HttpProxyAgent } = require('http-proxy-agent')
+const { HttpsProxyAgent } = require('https-proxy-agent')
+const { SocksProxyAgent } = require('socks-proxy-agent')
+const { LRUCache } = require('lru-cache')
+const { InvalidProxyProtocolError } = require('./errors.js')
+
+const PROXY_CACHE = new LRUCache({ max: 20 })
+
+const SOCKS_PROTOCOLS = new Set(SocksProxyAgent.protocols)
+
+const PROXY_ENV_KEYS = new Set(['https_proxy', 'http_proxy', 'proxy', 'no_proxy'])
+
+const PROXY_ENV = Object.entries(process.env).reduce((acc, [key, value]) => {
+  key = key.toLowerCase()
+  if (PROXY_ENV_KEYS.has(key)) {
+    acc[key] = value
+  }
+  return acc
+}, {})
+
+const getProxyAgent = (url) => {
+  url = new URL(url)
+
+  const protocol = url.protocol.slice(0, -1)
+  if (SOCKS_PROTOCOLS.has(protocol)) {
+    return SocksProxyAgent
+  }
+  if (protocol === 'https' || protocol === 'http') {
+    return [HttpProxyAgent, HttpsProxyAgent]
+  }
+
+  throw new InvalidProxyProtocolError(url)
+}
+
+const isNoProxy = (url, noProxy) => {
+  if (typeof noProxy === 'string') {
+    noProxy = noProxy.split(',').map((p) => p.trim()).filter(Boolean)
+  }
+
+  if (!noProxy || !noProxy.length) {
+    return false
+  }
+
+  const hostSegments = url.hostname.split('.').reverse()
+
+  return noProxy.some((no) => {
+    const noSegments = no.split('.').filter(Boolean).reverse()
+    if (!noSegments.length) {
+      return false
+    }
+
+    for (let i = 0; i < noSegments.length; i++) {
+      if (hostSegments[i] !== noSegments[i]) {
+        return false
+      }
+    }
+
+    return true
+  })
+}
+
+const getProxy = (url, { proxy, noProxy }) => {
+  url = new URL(url)
+
+  if (!proxy) {
+    proxy = url.protocol === 'https:'
+      ? PROXY_ENV.https_proxy
+      : PROXY_ENV.https_proxy || PROXY_ENV.http_proxy || PROXY_ENV.proxy
+  }
+
+  if (!noProxy) {
+    noProxy = PROXY_ENV.no_proxy
+  }
+
+  if (!proxy || isNoProxy(url, noProxy)) {
+    return null
+  }
+
+  return new URL(proxy)
+}
+
+module.exports = {
+  getProxyAgent,
+  getProxy,
+  proxyCache: PROXY_CACHE,
+}