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'use strict';
const http = require('http'),
https = require('https'),
async = require('async'),
color = require('colorful'),
certMgr = require('./lib/certMgr'),
Recorder = require('./lib/recorder'),
logUtil = require('./lib/log'),
util = require('./lib/util'),
events = require('events'),
co = require('co'),
WebInterface = require('./lib/webInterface'),
wsServerMgr = require('./lib/wsServerMgr'),
ThrottleGroup = require('stream-throttle').ThrottleGroup;
// const memwatch = require('memwatch-next');
// setInterval(() => {
// console.log(process.memoryUsage());
// const rss = Math.ceil(process.memoryUsage().rss / 1000 / 1000);
// console.log('Program is using ' + rss + ' mb of Heap.');
// }, 1000);
// memwatch.on('stats', (info) => {
// console.log('gc !!');
// console.log(process.memoryUsage());
// const rss = Math.ceil(process.memoryUsage().rss / 1000 / 1000);
// console.log('GC !! Program is using ' + rss + ' mb of Heap.');
// // var heapUsed = Math.ceil(process.memoryUsage().heapUsed / 1000);
// // console.log("Program is using " + heapUsed + " kb of Heap.");
// // console.log(info);
// });
const T_TYPE_HTTP = 'http',
T_TYPE_HTTPS = 'https',
DEFAULT_TYPE = T_TYPE_HTTP;
const PROXY_STATUS_INIT = 'INIT';
const PROXY_STATUS_READY = 'READY';
const PROXY_STATUS_CLOSED = 'CLOSED';
/**
*
* @class ProxyCore
* @extends {events.EventEmitter}
*/
class ProxyCore extends events.EventEmitter {
/**
* Creates an instance of ProxyCore.
*
* @param {object} config - configs
* @param {number} config.port - port of the proxy server
* @param {object} [config.rule=null] - rule module to use
* @param {string} [config.type=http] - type of the proxy server, could be 'http' or 'https'
* @param {strign} [config.hostname=localhost] - host name of the proxy server, required when this is an https proxy
* @param {number} [config.throttle] - speed limit in kb/s
* @param {boolean} [config.forceProxyHttps=false] - if proxy all https requests
* @param {boolean} [config.silent=false] - if keep the console silent
* @param {boolean} [config.dangerouslyIgnoreUnauthorized=false] - if ignore unauthorized server response
* @param {object} [config.recorder] - recorder to use
* @param {boolean} [config.wsIntercept] - whether intercept websocket
*
* @memberOf ProxyCore
*/
constructor(config) {
super();
config = config || {};
this.status = PROXY_STATUS_INIT;
this.proxyPort = config.port;
this.proxyType = /https/i.test(config.type || DEFAULT_TYPE) ? T_TYPE_HTTPS : T_TYPE_HTTP;
this.proxyHostName = config.hostname || 'localhost';
this.recorder = config.recorder;
if (parseInt(process.versions.node.split('.')[0], 10) < 4) {
throw new Error('node.js >= v4.x is required for anyproxy');
} else if (config.forceProxyHttps && !certMgr.ifRootCAFileExists()) {
logUtil.printLog('You can run `anyproxy-ca` to generate one root CA and then re-run this command');
throw new Error('root CA not found. Please run `anyproxy-ca` to generate one first.');
} else if (this.proxyType === T_TYPE_HTTPS && !config.hostname) {
throw new Error('hostname is required in https proxy');
} else if (!this.proxyPort) {
throw new Error('proxy port is required');
} else if (!this.recorder) {
throw new Error('recorder is required');
} else if (config.forceProxyHttps && config.rule && config.rule.beforeDealHttpsRequest) {
logUtil.printLog('both "-i(--intercept)" and rule.beforeDealHttpsRequest are specified, the "-i" option will be ignored.', logUtil.T_WARN);
config.forceProxyHttps = false;
}
this.httpProxyServer = null;
this.requestHandler = null;
// copy the rule to keep the original proxyRule independent
this.proxyRule = config.rule || {};
if (config.silent) {
logUtil.setPrintStatus(false);
}
if (config.throttle) {
logUtil.printLog('throttle :' + config.throttle + 'kb/s');
const rate = parseInt(config.throttle, 10);
if (rate < 1) {
throw new Error('Invalid throttle rate value, should be positive integer');
}
global._throttle = new ThrottleGroup({ rate: 1024 * rate }); // rate - byte/sec
}
// init recorder
this.recorder = config.recorder;
// init request handler
const RequestHandler = util.freshRequire('./requestHandler');
this.requestHandler = new RequestHandler({
wsIntercept: config.wsIntercept,
httpServerPort: config.port, // the http server port for http proxy
forceProxyHttps: !!config.forceProxyHttps,
dangerouslyIgnoreUnauthorized: !!config.dangerouslyIgnoreUnauthorized
}, this.proxyRule, this.recorder);
}
/**
* manage all created socket
* for each new socket, we put them to a map;
* if the socket is closed itself, we remove it from the map
* when the `close` method is called, we'll close the sockes before the server closed
*
* @param {Socket} the http socket that is creating
* @returns undefined
* @memberOf ProxyCore
*/
handleExistConnections(socket) {
const self = this;
self.socketIndex ++;
const key = `socketIndex_${self.socketIndex}`;
self.socketPool[key] = socket;
// if the socket is closed already, removed it from pool
socket.on('close', () => {
delete self.socketPool[key];
});
}
/**
* start the proxy server
*
* @returns ProxyCore
*
* @memberOf ProxyCore
*/
start() {
const self = this;
self.socketIndex = 0;
self.socketPool = {};
if (self.status !== PROXY_STATUS_INIT) {
throw new Error('server status is not PROXY_STATUS_INIT, can not run start()');
}
async.series(
[
//creat proxy server
function (callback) {
if (self.proxyType === T_TYPE_HTTPS) {
certMgr.getCertificate(self.proxyHostName, (err, keyContent, crtContent) => {
if (err) {
callback(err);
} else {
self.httpProxyServer = https.createServer({
key: keyContent,
cert: crtContent
}, self.requestHandler.userRequestHandler);
callback(null);
}
});
} else {
self.httpProxyServer = http.createServer(self.requestHandler.userRequestHandler);
callback(null);
}
},
//handle CONNECT request for https over http
function (callback) {
self.httpProxyServer.on('connect', self.requestHandler.connectReqHandler);
callback(null);
},
function (callback) {
wsServerMgr.getWsServer({
server: self.httpProxyServer,
connHandler: self.requestHandler.wsHandler
});
// remember all sockets, so we can destory them when call the method 'close';
self.httpProxyServer.on('connection', (socket) => {
self.handleExistConnections.call(self, socket);
});
callback(null);
},
//start proxy server
function (callback) {
self.httpProxyServer.listen(self.proxyPort);
callback(null);
},
],
//final callback
(err, result) => {
if (!err) {
const tipText = (self.proxyType === T_TYPE_HTTP ? 'Http' : 'Https') + ' proxy started on port ' + self.proxyPort;
logUtil.printLog(color.green(tipText));
if (self.webServerInstance) {
const webTip = 'web interface started on port ' + self.webServerInstance.webPort;
logUtil.printLog(color.green(webTip));
}
let ruleSummaryString = '';
const ruleSummary = this.proxyRule.summary;
if (ruleSummary) {
co(function *() {
if (typeof ruleSummary === 'string') {
ruleSummaryString = ruleSummary;
} else {
ruleSummaryString = yield ruleSummary();
}
logUtil.printLog(color.green(`Active rule is: ${ruleSummaryString}`));
});
}
self.status = PROXY_STATUS_READY;
self.emit('ready');
} else {
const tipText = 'err when start proxy server :(';
logUtil.printLog(color.red(tipText), logUtil.T_ERR);
logUtil.printLog(err, logUtil.T_ERR);
self.emit('error', {
error: err
});
}
}
);
return self;
}
/**
* close the proxy server
*
* @returns ProxyCore
*
* @memberOf ProxyCore
*/
close() {
// clear recorder cache
return new Promise((resolve) => {
if (this.httpProxyServer) {
// destroy conns & cltSockets when closing proxy server
for (const connItem of this.requestHandler.conns) {
const key = connItem[0];
const conn = connItem[1];
logUtil.printLog(`destorying https connection : ${key}`);
conn.end();
}
for (const cltSocketItem of this.requestHandler.cltSockets) {
const key = cltSocketItem[0];
const cltSocket = cltSocketItem[1];
logUtil.printLog(`endding https cltSocket : ${key}`);
cltSocket.end();
}
if (this.socketPool) {
for (const key in this.socketPool) {
this.socketPool[key].destroy();
}
}
this.httpProxyServer.close((error) => {
if (error) {
console.error(error);
logUtil.printLog(`proxy server close FAILED : ${error.message}`, logUtil.T_ERR);
} else {
this.httpProxyServer = null;
this.status = PROXY_STATUS_CLOSED;
logUtil.printLog(`proxy server closed at ${this.proxyHostName}:${this.proxyPort}`);
}
resolve(error);
});
} else {
resolve();
}
})
}
}
/**
* start proxy server as well as recorder and webInterface
*/
class ProxyServer extends ProxyCore {
/**
*
* @param {object} config - config
* @param {object} [config.webInterface] - config of the web interface
* @param {boolean} [config.webInterface.enable=false] - if web interface is enabled
* @param {number} [config.webInterface.webPort=8002] - http port of the web interface
*/
constructor(config) {
// prepare a recorder
const recorder = new Recorder();
const configForCore = Object.assign({
recorder,
}, config);
super(configForCore);
this.proxyWebinterfaceConfig = config.webInterface;
this.recorder = recorder;
this.webServerInstance = null;
}
start() {
// start web interface if neeeded
if (this.proxyWebinterfaceConfig && this.proxyWebinterfaceConfig.enable) {
this.webServerInstance = new WebInterface(this.proxyWebinterfaceConfig, this.recorder);
// start web server
this.webServerInstance.start().then(() => {
// start proxy core
super.start();
})
.catch((e) => {
this.emit('error', e);
});
} else {
super.start();
}
}
close() {
return new Promise((resolve, reject) => {
super.close()
.then((error) => {
if (error) {
resolve(error);
}
});
if (this.recorder) {
logUtil.printLog('clearing cache file...');
this.recorder.clear();
}
const tmpWebServer = this.webServerInstance;
this.recorder = null;
this.webServerInstance = null;
if (tmpWebServer) {
logUtil.printLog('closing webserver...');
tmpWebServer.close((error) => {
if (error) {
console.error(error);
logUtil.printLog(`proxy web server close FAILED: ${error.message}`, logUtil.T_ERR);
} else {
logUtil.printLog(`proxy web server closed at ${this.proxyHostName} : ${this.webPort}`);
}
resolve(error);
})
} else {
resolve(null);
}
});
}
}
module.exports.ProxyCore = ProxyCore;
module.exports.ProxyServer = ProxyServer;
module.exports.ProxyRecorder = Recorder;
module.exports.ProxyWebServer = WebInterface;
module.exports.utils = {
systemProxyMgr: require('./lib/systemProxyMgr'),
certMgr,
};