catproxy/_book/src/httpsProxySer.js

a node proxy or host change tools

// 创建一个https的代理服务器
import https from 'https';
import {getCert} from './cert/cert.js';
import {getPort} from './tools';
import Promise from 'promise';
import log from './log';
import tls from 'tls';
import util from 'util';
import {requestHandler, requestUpgradeHandler} from './requestSerives';
let SNICallback = (servername, callback) => {
	try {
		let {privateKey: key, cert} = getCert(servername);
		let ctx = tls.createSecureContext({key, cert});
		callback(null, ctx);
	} catch (e) {
		log.error(e);
		callback(e);
	}
};
export {SNICallback};
export default (host, port) => {
	if (!host) {
		throw new Error('host is must');
	}
	return Promise.resolve(port)
	.then(p => {
		if (p) {
			return p;
		} else {
			return getPort();
		}
	})
	// 不支持sni的请求可能点了就没反应,SNICallback在客户端不支持的情况下，不会报错，会直接返回
	.then(port => {
		let {privateKey: key, cert} = getCert(host);
		let server = https.createServer({
			key, 
			cert,
			SNICallback,
			rejectUnauthorized: false
		}, function(req, res) {
			if (req.headers.upgrade) {
				return;
			}
			requestHandler.call(this, req, res);
		});

		server.on('upgrade', requestUpgradeHandler);
		
		server.on('clientError', function(err, con) {
			log.error('clientError', err);
		});
		
		server.listen(port);
		server.on('error', err => log.error(err + 'inner https prxoy server err:' + err));
		return {server, port};
	})
	.then(null, err => log.error('create https proxy server error:' + err));
};