Aiden Cline
73 lines
2.6 KiB
TypeScript
73 lines
2.6 KiB
TypeScript
/*
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* Adapted from proxy-from-env: https://github.com/Rob--W/proxy-from-env
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*
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* The MIT License
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*
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* Copyright (C) 2016-2018 Rob Wu <rob@robwu.nl>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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const DEFAULT_PORTS: Record<string, number> = {
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ftp: 21,
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gopher: 70,
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http: 80,
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https: 443,
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ws: 80,
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wss: 443,
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}
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export function getProxyForUrl(input: string | URL) {
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const url = typeof input === "string" ? (URL.canParse(input) ? new URL(input) : undefined) : input
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if (!url) return
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const protocol = url.protocol.split(":", 1)[0]
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const hostname = url.host.replace(/:\d*$/, "")
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const port = Number.parseInt(url.port) || DEFAULT_PORTS[protocol] || 0
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if (!shouldProxy(hostname, port)) return
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const proxy = env(`${protocol}_proxy`) || env("all_proxy")
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if (!proxy) return
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return proxy.includes("://") ? proxy : `${protocol}://${proxy}`
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}
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function shouldProxy(hostname: string, port: number) {
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const noProxy = env("no_proxy").toLowerCase()
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if (!noProxy) return true
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if (noProxy === "*") return false
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return noProxy.split(/[,\s]/).every((proxy) => {
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if (!proxy) return true
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const parsed = proxy.match(/^(.+):(\d+)$/)
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const proxyHostname = parsed ? parsed[1] : proxy
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const proxyPort = parsed ? Number.parseInt(parsed[2]) : 0
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if (proxyPort && proxyPort !== port) return true
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if (!/^[.*]/.test(proxyHostname)) return hostname !== proxyHostname
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return !hostname.endsWith(proxyHostname.startsWith("*") ? proxyHostname.slice(1) : proxyHostname)
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})
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}
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function env(key: string) {
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return process.env[key.toLowerCase()] || process.env[key.toUpperCase()] || ""
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}
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export * as ProxyEnv from "./proxy-env"
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