catproxy/src/serverManager.js

a node proxy or host change tools

import getHttpsSer from './httpsProxySer';
import Promise from 'promise';
import util from 'util';
import log from './log';
let servers = { length: 0 };
let serversPromise = {};

export default serverName => {
	// 不传递servername则用sni
	if (!serverName) {
		serverName = 'localhost';
	}
	if (servers[serverName]) {
		return Promise.resolve(servers[serverName]);
	} else {
		serversPromise[serverName] =
			serversPromise[serverName] ||
			getHttpsSer(serverName).then(info => {
				servers[serverName] = info;
				servers['length'] += 1;
				log.debug('当前代理服务器数据：' + servers.length);
				delete serversPromise[serverName];
				return info;
			});
		return serversPromise[serverName];
	}
};