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79 lines
2.2 KiB
79 lines
2.2 KiB
'use strict' |
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function formatHostname (hostname) { |
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// canonicalize the hostname, so that 'oogle.com' won't match 'google.com' |
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return hostname.replace(/^\.*/, '.').toLowerCase() |
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} |
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function parseNoProxyZone (zone) { |
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zone = zone.trim().toLowerCase() |
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var zoneParts = zone.split(':', 2) |
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var zoneHost = formatHostname(zoneParts[0]) |
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var zonePort = zoneParts[1] |
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var hasPort = zone.indexOf(':') > -1 |
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return {hostname: zoneHost, port: zonePort, hasPort: hasPort} |
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} |
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function uriInNoProxy (uri, noProxy) { |
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var port = uri.port || (uri.protocol === 'https:' ? '443' : '80') |
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var hostname = formatHostname(uri.hostname) |
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var noProxyList = noProxy.split(',') |
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// iterate through the noProxyList until it finds a match. |
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return noProxyList.map(parseNoProxyZone).some(function (noProxyZone) { |
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var isMatchedAt = hostname.indexOf(noProxyZone.hostname) |
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var hostnameMatched = ( |
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isMatchedAt > -1 && |
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(isMatchedAt === hostname.length - noProxyZone.hostname.length) |
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) |
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if (noProxyZone.hasPort) { |
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return (port === noProxyZone.port) && hostnameMatched |
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} |
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return hostnameMatched |
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}) |
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} |
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function getProxyFromURI (uri) { |
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// Decide the proper request proxy to use based on the request URI object and the |
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// environmental variables (NO_PROXY, HTTP_PROXY, etc.) |
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// respect NO_PROXY environment variables (see: https://lynx.invisible-island.net/lynx2.8.7/breakout/lynx_help/keystrokes/environments.html) |
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var noProxy = process.env.NO_PROXY || process.env.no_proxy || '' |
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// if the noProxy is a wildcard then return null |
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if (noProxy === '*') { |
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return null |
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} |
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// if the noProxy is not empty and the uri is found return null |
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if (noProxy !== '' && uriInNoProxy(uri, noProxy)) { |
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return null |
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} |
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// Check for HTTP or HTTPS Proxy in environment Else default to null |
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if (uri.protocol === 'http:') { |
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return process.env.HTTP_PROXY || |
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process.env.http_proxy || null |
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} |
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if (uri.protocol === 'https:') { |
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return process.env.HTTPS_PROXY || |
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process.env.https_proxy || |
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process.env.HTTP_PROXY || |
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process.env.http_proxy || null |
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} |
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// if none of that works, return null |
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// (What uri protocol are you using then?) |
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return null |
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} |
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module.exports = getProxyFromURI
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