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Merge pull request #1346 from seanstrom/support/extract-getProxyFromURI
getProxyFromURI Extraction Refactor
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'use strict' | ||
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function formatHostname(hostname) { | ||
// canonicalize the hostname, so that 'oogle.com' won't match 'google.com' | ||
return hostname.replace(/^\.*/, '.').toLowerCase() | ||
} | ||
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function parseNoProxyZone(zone) { | ||
zone = zone.trim().toLowerCase() | ||
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var zoneParts = zone.split(':', 2) | ||
, zoneHost = formatHostname(zoneParts[0]) | ||
, zonePort = zoneParts[1] | ||
, hasPort = zone.indexOf(':') > -1 | ||
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return {hostname: zoneHost, port: zonePort, hasPort: hasPort} | ||
} | ||
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function uriInNoProxy(uri, noProxy) { | ||
var port = uri.port || (uri.protocol === 'https:' ? '443' : '80') | ||
, hostname = formatHostname(uri.hostname) | ||
, noProxyList = noProxy.split(',') | ||
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// iterate through the noProxyList until it finds a match. | ||
return noProxyList.map(parseNoProxyZone).some(function(noProxyZone) { | ||
var isMatchedAt = hostname.indexOf(noProxyZone.hostname) | ||
, hostnameMatched = ( | ||
isMatchedAt > -1 && | ||
(isMatchedAt === hostname.length - noProxyZone.hostname.length) | ||
) | ||
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if (noProxyZone.hasPort) { | ||
return (port === noProxyZone.port) && hostnameMatched | ||
} | ||
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return hostnameMatched | ||
}) | ||
} | ||
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function getProxyFromURI(uri) { | ||
// Decide the proper request proxy to use based on the request URI object and the | ||
// environmental variables (NO_PROXY, HTTP_PROXY, etc.) | ||
// respect NO_PROXY environment variables (see: http://lynx.isc.org/current/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 === '*') { | ||
return null | ||
} | ||
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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)) { | ||
return null | ||
} | ||
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// Check for HTTP or HTTPS Proxy in environment Else default to null | ||
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if (uri.protocol === 'http:') { | ||
return process.env.HTTP_PROXY || | ||
process.env.http_proxy || null | ||
} | ||
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if (uri.protocol === 'https:') { | ||
return process.env.HTTPS_PROXY || | ||
process.env.https_proxy || | ||
process.env.HTTP_PROXY || | ||
process.env.http_proxy || null | ||
} | ||
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// if none of that works, return null | ||
// (What uri protocol are you using then?) | ||
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return null | ||
} | ||
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module.exports = getProxyFromURI |
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