'use strict';
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var debug = require('util').debuglog('urllib:detect_proxy_agent');
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var getProxyFromURI = require('./get_proxy_from_uri');
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var proxyAgents = {};
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function detectProxyAgent(uri, args) {
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if (!args.enableProxy && !process.env.URLLIB_ENABLE_PROXY) {
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return null;
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}
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var proxy = args.proxy || process.env.URLLIB_PROXY;
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if (!proxy) {
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proxy = getProxyFromURI(uri);
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if (!proxy) {
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return null;
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}
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}
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var proxyAgent = proxyAgents[proxy];
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if (!proxyAgent) {
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debug('create new proxy %s', proxy);
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// lazy require, only support node >= 4
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proxyAgent = proxyAgents[proxy] = new (require('proxy-agent'))(proxy);
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}
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debug('get proxy: %s', proxy);
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return proxyAgent;
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}
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module.exports = detectProxyAgent;
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module.exports.proxyAgents = proxyAgents;
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