mirror of
https://github.com/avwo/whistle.git
synced 2026-10-18 22:51:32 +08:00
avwo
863 lines
29 KiB
JavaScript
863 lines
29 KiB
JavaScript
var net = require('net');
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var tls = require('tls');
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var http = require('http');
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var url = require('url');
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var socks = require('sockx');
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var crypto = require('crypto');
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var EventEmitter = require('events').EventEmitter;
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var Buffer = require('safe-buffer').Buffer;
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var LRU = require('lru-cache');
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var checkSNI = require('sni');
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var util = require('../util');
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var extend = require('extend');
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var config = require('../config');
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var rules = require('../rules');
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var pluginMgr = require('../plugins');
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var socketMgr = require('../socket-mgr');
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var hparser = require('hparser');
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var ca = require('./ca');
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var STATUS_CODES = http.STATUS_CODES || {};
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var getRawHeaders = hparser.getRawHeaders;
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var getRawHeaderNames = hparser.getRawHeaderNames;
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var formatHeaders = hparser.formatHeaders;
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var parseReq = hparser.parse;
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var getDomain = ca.getDomain;
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var serverAgent = ca.serverAgent;
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var getSNIServer = ca.getSNIServer;
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var LOCALHOST = '127.0.0.1';
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var tunnelTmplData = new LRU({max: 3000, maxAge: 30000});
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var TIMEOUT = 5000;
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var LOCAL_TIMEOUT = 3000;
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var AUTH_TIMEOUT = 3000;
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var CONN_TIMEOUT = 60000;
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var X_RE = /^x/;
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var proxy, server;
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function handleWebsocket(socket, clientIp, clientPort) {
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var wss = socket.isHttps;
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clientIp = util.removeIPV6Prefix(clientIp || socket.remoteAddress);
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socket.clientIp = clientIp;
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socket.method = 'GET';
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socket.reqId = util.getReqId();
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socket.clientPort = clientPort || socket.remotePort;
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pluginMgr.resolvePipePlugin(socket, function() {
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socket.rules = rules.initRules(socket);
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var urlParamsRule = socket.rules.urlParams;
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util.parseRuleJson(urlParamsRule, function(urlParams) {
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if (urlParams) {
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var _url = util.replaceUrlQueryString(socket.url, urlParams);
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if (socket.url !== _url) {
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socket.url = _url;
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socket.fullUrl = util.getFullUrl(socket).replace('http', 'ws');
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socket.curUrl = socket.fullUrl;
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socket.rules = rules.resolveRules(socket);
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socket.rules.urlParams = urlParamsRule;
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if (socket.headerRulesMgr) {
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var _rules = socket.rules;
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socket.rules = socket.headerRulesMgr.resolveRules(socket);
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util.mergeRules(socket, _rules);
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}
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}
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}
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resolveWebsocket(socket, wss);
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});
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});
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}
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function resolveWebsocket(socket, wss) {
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var headers = socket.headers;
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var reqEmitter = new EventEmitter();
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var fullUrl = socket.fullUrl;
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var _rules = socket.rules;
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var clientIp = socket.clientIp;
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rules.resolveRulesFile(socket, function() {
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var filter = socket.filter;
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var now = Date.now();
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var reqData = {
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ip: clientIp,
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port: socket.clientPort,
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method: 'GET',
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httpVersion: socket.httpVersion || '1.1',
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headers: headers,
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rawHeaderNames: socket.rawHeaderNames
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};
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var resData = {};
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var data = {
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id: socket.reqId,
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url: fullUrl,
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startTime: now,
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rules: _rules,
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req: reqData,
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res: resData,
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pipe: socket._pipeRule,
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rulesHeaders: socket.rulesHeaders
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};
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var reqSocket, options, pluginRules, isInternalProxy, origProto, isHttpsInternal, done, proxyUrl;
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var timeout = setTimeout(function() {
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destroy(new Error('Timeout'));
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}, CONN_TIMEOUT);
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var response = function() {
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var statusCode = util.getMatcherValue(_rules.statusCode);
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if (!statusCode) {
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return;
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}
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var status = util.getStatusCode(statusCode);
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var resHeaders = resData.headers = {};
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var body = '';
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var statusMsg;
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if (status === 101) {
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statusMsg = 'HTTP/1.1 101 Switching Protocols';
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var protocol = (headers['sec-websocket-protocol'] || '').split(/, */);
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var key = headers['sec-websocket-key'] + '258EAFA5-E914-47DA-95CA-C5AB0DC85B11';
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key = crypto.createHash('sha1')
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.update(key, 'binary')
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.digest('base64');
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resHeaders['Sec-WebSocket-Accept'] = key;
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resHeaders.Upgrade = 'websocket';
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resHeaders.Connection = 'Upgrade';
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if (protocol[0]) {
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resHeaders['Sec-WebSocket-Protocol'] = protocol[0];
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}
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reqSocket = util.getEmptyRes();
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reqSocket.headers = resHeaders;
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socketMgr.handleUpgrade(socket, reqSocket);
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} else {
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if (!status) {
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status = 502;
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body = 'Invalid status code: ' + statusCode;
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resHeaders['Content-Type'] = 'text/html; charset=utf8';
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resHeaders['Content-Length'] = Buffer.byteLength(body) + '';
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}
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resHeaders.Connection = 'close';
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statusMsg = 'HTTP/1.1 ' + status;
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}
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resData.statusCode = status;
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resData.body = body;
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data.requestTime = data.dnsTime =Date.now();
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var rawData = statusMsg + '\r\n' + getRawHeaders(resHeaders) + '\r\n\r\n' + body;
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var end = function() {
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data.responseTime = data.endTime = Date.now();
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socket.write(rawData);
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reqEmitter.emit('end', data);
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};
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var reqDelay = util.getMatcherValue(_rules.reqDelay) | 0;
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var resDelay = util.getMatcherValue(_rules.resDelay) | 0;
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var delay = reqDelay + resDelay;
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if (delay > 0) {
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clearTimeout(timeout);
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setTimeout(end, delay);
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} else {
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end();
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}
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return true;
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};
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var plugin = pluginMgr.resolveWhistlePlugins(socket);
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pluginMgr.getRules(socket, function(rulesMgr) {
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if (pluginRules = rulesMgr) {
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socket.curUrl = fullUrl;
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util.mergeRules(socket, rulesMgr.resolveRules(socket));
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if (util.isIgnored(filter, 'rule')) {
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plugin = null;
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} else {
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plugin = pluginMgr.getPluginByRuleUrl(util.rule.getUrl(_rules.rule));
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}
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}
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var ruleUrlValue = plugin ? null : util.rule.getUrl(_rules.rule);
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if (ruleUrlValue && fullUrl !== ruleUrlValue && /^(ws|http)s?:\/\//.test(ruleUrlValue)) {
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if (RegExp.$1 === 'http') {
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ruleUrlValue = ruleUrlValue.replace('http', 'ws');
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}
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data.realUrl = fullUrl = util.encodeNonLatin1Char(ruleUrlValue);
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}
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if (_rules.referer) {
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var referer = util.getMatcherValue(_rules.referer);
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headers.referer = referer;
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}
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if (_rules.ua) {
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var ua = util.getMatcherValue(_rules.ua);
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headers['user-agent'] = ua;
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}
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if (!socket.isPluginReq && !socket.isInternalUrl && !config.rulesMode && (!filter.hide || socket.disable.hide)) {
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data.abort = destroy;
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proxy.emit('request', reqEmitter, data);
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}
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setupSocket(function() {
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if (socket.enable.abort || filter.abort) {
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return destroy();
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}
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if (response()) {
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return;
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}
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pluginMgr.loadPlugin(plugin, function(err, ports) {
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if (err) {
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return execCallback(err);
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}
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var port = ports && ports.port;
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if (port) {
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options.port = port;
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data.realUrl = util.changePort(fullUrl, options.port);
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socket.customParser = util.getParserStatus(socket);
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pluginMgr.addRuleHeaders(socket, _rules);
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socketMgr.setPending(socket);
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options.protocol = 'ws:';
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socket.headers[config.PLUGIN_HOOK_NAME_HEADER] = config.PLUGIN_HOOKS.HTTP;
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connectServer();
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return;
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}
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plugin = null;
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rules.getProxy(fullUrl, socket, function(err, hostIp, hostPort) {
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var proxyRule = _rules.proxy;
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var connectProxy;
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var send = function() {
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if (connectProxy) {
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connectProxy();
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} else {
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connectServer(hostIp, hostPort);
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}
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};
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var connect = function() {
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var reqDelay = util.getMatcherValue(_rules.reqDelay);
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if (reqDelay > 0) {
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clearTimeout(timeout);
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setTimeout(function() {
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timeout = setTimeout(function() {
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destroy(new Error('Timeout'));
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}, CONN_TIMEOUT);
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send();
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}, reqDelay);
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} else {
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send();
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}
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};
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proxyUrl = proxyRule ? util.rule.getMatcher(proxyRule) : null;
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if (proxyUrl) {
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var isXProxy = X_RE.test(proxyUrl);
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var isSocks = proxyRule.isSocks;
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var isHttpsProxy = proxyRule.isHttps;
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isHttpsInternal = proxyRule.isHttpsInternal;
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isInternalProxy = proxyRule.isInternal;
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var isHttps2HttpProxy = isInternalProxy || proxyRule.isHttps2http;
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if (!isHttps2HttpProxy && !wss && proxyRule.isHttp2https) {
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wss = true;
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} else {
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wss = options.protocol === 'wss:';
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}
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proxyUrl = 'http:' + util.removeProtocol(proxyUrl);
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getServerIp(proxyUrl, function(ip) {
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var proxyOptions = url.parse(proxyUrl);
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hostPort = proxyOptions.port;
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hostIp = ip;
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var proxyPort = proxyOptions.port = parseInt(hostPort, 10) || (isSocks ? 1080 : (isHttpsProxy ? 443 : 80));
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var isProxyPort = util.isProxyPort(proxyPort);
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if (isProxyPort && util.isLocalAddress(ip)) {
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return execCallback(new Error('Self loop (' + ip + ':' + proxyPort + ')'));
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}
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options.proxyHost = ip;
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resData.port = options.proxyPort = proxyPort;
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options.host = options.hostname;
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if (!options.port) {
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options.port = wss ? 443 : 80;
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}
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var handleProxy = function(proxySocket) {
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if (wss) {
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proxySocket = tls.connect({
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rejectUnauthorized: false,
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socket: proxySocket,
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servername: options.hostname
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});
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proxySocket.on('error', function(err) {
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if (util.checkTlsError(err) && util.checkAuto2Http(socket, ip, proxyUrl)) {
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wss = false;
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handleProxy(proxySocket);
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} else {
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execCallback(err);
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}
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});
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reqSocket = proxySocket;
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proxySocket.on('secureConnect', function() {
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abortIfUnavailable(reqSocket);
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pipeData();
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});
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return;
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}
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reqSocket = proxySocket;
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abortIfUnavailable(reqSocket);
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pipeData();
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};
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if (isSocks) {
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options.localDNS = false;
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options.auths = config.getAuths(proxyOptions);
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} else {
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var proxyHeaders = options.headers = {};
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var ua = !socket.disable.proxyUA && headers['user-agent'];
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if (ua) {
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proxyHeaders['user-agent'] = ua;
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}
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if (!util.isLocalAddress(clientIp)) {
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proxyHeaders[config.CLIENT_IP_HEAD] = clientIp;
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}
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if(isProxyPort) {
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proxyHeaders[config.WEBUI_HEAD] = 1;
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}
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if (isHttps2HttpProxy) {
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if (isInternalProxy && wss) {
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headers[config.HTTPS_FIELD] = 1;
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options.protocol = null;
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origProto = 'wss:';
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}
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wss = false;
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}
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util.checkIfAddInterceptPolicy(proxyHeaders, headers);
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util.setClientId(proxyHeaders, socket.enable, socket.disable, clientIp);
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options.proxyAuth = proxyOptions.auth;
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}
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var netMgr = isSocks ? socks : config;
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var proxyOpts = util.setProxyHost(socket, options);
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if (isHttpsProxy) {
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proxyOpts.proxyServername = proxyOptions.hostname;
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}
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connectProxy = isInternalProxy ? null : function() {
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if (destroyed) {
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return;
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}
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try {
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var s = netMgr.connect(proxyOpts, handleProxy);
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s.on('error', isXProxy ? function() {
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if (isXProxy) {
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isXProxy = false;
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connectServer();
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}
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} : execCallback);
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} catch (e) {
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execCallback(e);
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}
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};
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connect();
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});
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} else {
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connect();
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}
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});
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});
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});
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});
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var retryConnect, auto2http;
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var retryXHost = 0;
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function connectServer(hostIp, hostPort) {
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getServerIp(fullUrl, function(ip, port) {
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var isWss = isHttpsInternal || options.protocol === 'wss:';
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var _port = port;
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resData.port = port = port || options.port || (isWss ? 443 : 80);
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if (destroyed) {
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return;
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}
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if (util.isProxyPort(port) && util.isLocalAddress(ip)) {
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return execCallback(new Error('Self loop (' + ip + ':' + port + ')'));
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}
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// checkHandUpError, retry
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try {
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reqSocket = (isWss ? tls : net).connect({
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rejectUnauthorized: false,
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host: ip,
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port: port,
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servername: util.parseHost(headers.host)[0] || options.hostname
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}, pipeData);
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} catch (e) {
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return execCallback(e);
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}
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if (retryConnect) {
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abortIfUnavailable(reqSocket);
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} else {
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retryConnect = function(e) {
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if (retryXHost < 2 && (
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(_rules.host && X_RE.test(_rules.host.matcher)) ||
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(isInternalProxy && X_RE.test(proxyUrl))
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)) {
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++retryXHost;
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retryConnect = false;
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if (retryXHost > 1) {
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if (isHttpsInternal) {
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isHttpsInternal = false;
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options.protocol = origProto;
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}
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socket.curUrl = fullUrl;
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rules.lookupHost(socket, function(err, _ip) {
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socket.hostIp = resData.ip = _ip || LOCALHOST;
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if (err) {
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return execCallback(err);
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}
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connectServer(_ip);
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});
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return;
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}
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} else if (isWss && util.checkAuto2Http(socket, ip, proxyUrl)) {
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if (auto2http || util.checkTlsError(e)) {
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options.protocol = null;
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} else {
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retryConnect = false;
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auto2http = true;
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}
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}
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connectServer(ip, _port);
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};
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var retried;
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// 不要用once，防止多次触发error导致crash
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reqSocket.on('error', function() {
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if (!retried) {
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retried = true;
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this.destroy && this.destroy();
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!destroyed && retryConnect && retryConnect();
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}
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});
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}
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}, hostIp, hostPort);
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}
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function pipeData() {
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if (retryConnect) {
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reqSocket.removeListener('error', retryConnect);
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abortIfUnavailable(reqSocket);
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retryConnect = null;
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}
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clearTimeout(timeout);
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proxyUrl ? util.setClientId(headers, socket.enable, socket.disable, clientIp) : util.removeClientId(headers);
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reqSocket.write(socket.getBuffer(headers, options.path));
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delete headers[config.HTTPS_FIELD];
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var resDelay = util.getMatcherValue(_rules.resDelay);
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if (resDelay > 0) {
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setTimeout(_pipeData, resDelay);
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} else {
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_pipeData();
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}
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}
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function setupSocket(cb) {
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var list = [_rules.reqHeaders, _rules.reqCors, _rules.reqCookies, _rules.params, _rules.urlReplace];
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util.parseRuleJson(list, function(reqHeaders, reqCors, reqCookies, params, urlReplace) {
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var newUrl = params ? util.replaceUrlQueryString(fullUrl, params) : fullUrl;
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newUrl = util.parsePathReplace(newUrl, urlReplace) || newUrl;
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if (newUrl !== fullUrl) {
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fullUrl = newUrl;
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options = util.parseUrl(fullUrl);
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} else {
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options = util.parseUrl(fullUrl);
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}
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data.realUrl = fullUrl;
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var host = headers.host = options.host;
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var origin = headers.origin;
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if (origin) {
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headers.origin = (options.protocol == 'wss:' ? 'https://' : 'http://') + options.host;
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}
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socket._origin = origin;
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var customXFF;
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if (reqHeaders) {
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reqHeaders = util.lowerCaseify(reqHeaders, socket.rawHeaderNames);
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customXFF = reqHeaders['x-forwarded-for'];
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extend(headers, reqHeaders);
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headers.host = headers.host || host;
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}
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var reqRuleData = { headers: headers };
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util.setReqCors(reqRuleData, reqCors);
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util.setReqCookies(reqRuleData, reqCookies, headers.cookie);
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if (_rules.referer) {
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headers.referer = util.getMatcherValue(_rules.referer);
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}
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if (socket.disable.clientIp || socket.disable.clientIP) {
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delete headers[config.CLIENT_IP_HEAD];
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} else {
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var forwardedFor = util.getMatcherValue(_rules.forwardedFor);
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if (forwardedFor) {
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headers[config.CLIENT_IP_HEAD] = forwardedFor;
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} else if (!customXFF && !config.keepXFF
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&& (!plugin || util.isLocalAddress(headers[config.CLIENT_IP_HEAD]))) {
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delete headers[config.CLIENT_IP_HEAD];
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}
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}
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var delReqHeaders = util.parseDeleteProperties(socket).reqHeaders;
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Object.keys(delReqHeaders).forEach(function(name) {
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delete headers[name];
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});
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util.disableReqProps(socket);
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pluginMgr.postStats(socket);
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cb();
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});
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}
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function _pipeData() {
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parseReq(reqSocket, function(err, res) {
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if (err) {
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return execCallback(err);
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}
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socket.statusCode = res.statusCode || '';
|
|
socket.resHeaders = res.headers;
|
|
pluginMgr.getResRules(socket, res, function() {
|
|
util.parseRuleJson([_rules.resHeaders, _rules.resCors, _rules.resCookies],
|
|
function(resHeaders, cors, cookies) {
|
|
reqSocket.headers = headers = res.headers;
|
|
if (resHeaders) {
|
|
resHeaders = util.lowerCaseify(resHeaders, res.rawHeaderNames);
|
|
extend(res.headers, resHeaders);
|
|
}
|
|
var origin = headers['access-control-allow-origin'];
|
|
if (socket._origin && origin && origin !== '*') {
|
|
headers['access-control-allow-origin'] = socket._origin;
|
|
}
|
|
var resRuleData = { headers: headers };
|
|
util.setResCors(resRuleData, cors, socket.headers.origin);
|
|
util.setResCookies(resRuleData, cookies);
|
|
util.setResponseFor(_rules, headers, socket, socket.hostIp);
|
|
var delResHeaders = util.parseDeleteProperties(socket).resHeaders;
|
|
Object.keys(delResHeaders).forEach(function(name) {
|
|
delete headers[name];
|
|
});
|
|
util.disableResProps(socket, headers);
|
|
reqSocket.reqId = data.id;
|
|
if (res.statusCode == 101) {
|
|
socket.write(res.getBuffer(headers));
|
|
socketMgr.handleUpgrade(socket, reqSocket);
|
|
} else {
|
|
resData.body = res.body;
|
|
socket.destroy();
|
|
}
|
|
resData.headers = headers;
|
|
resData.rawHeaderNames = res.rawHeaderNames;
|
|
resData.statusCode = res.statusCode;
|
|
reqEmitter.emit('response', data);
|
|
execCallback(null, reqSocket);
|
|
});
|
|
});
|
|
}, true);
|
|
}
|
|
|
|
function getServerIp(url, callback, hostIp, hostPort) {
|
|
if (plugin) {
|
|
return callback(LOCALHOST);
|
|
}
|
|
var hostHandler = function(err, ip, port, host) {
|
|
if (err) {
|
|
return execCallback(err);
|
|
}
|
|
|
|
if (host) {
|
|
_rules.host = host;
|
|
}
|
|
socket.hostIp = resData.ip = util.getHostIp(ip, port);
|
|
data.requestTime = data.dnsTime = Date.now();
|
|
reqEmitter.emit('send', data);
|
|
callback(ip, port);
|
|
};
|
|
if (hostIp) {
|
|
hostHandler(null, hostIp, hostPort);
|
|
} else {
|
|
socket.curUrl = url;
|
|
rules.resolveHost(socket, hostHandler, pluginRules, socket.rulesFileMgr, socket.headerRulesMgr);
|
|
}
|
|
}
|
|
|
|
function abortIfUnavailable(socket) {
|
|
return socket.on('error', destroy).on('close', destroy);
|
|
}
|
|
var destroyed, reqDestroyed, resDestroyed;
|
|
function destroy(err) {
|
|
if (!reqDestroyed) {
|
|
reqDestroyed = true;
|
|
socket.destroy();
|
|
}
|
|
if (reqSocket && !resDestroyed) {
|
|
resDestroyed = true;
|
|
reqSocket.destroy();
|
|
}
|
|
if (destroyed) {
|
|
return;
|
|
}
|
|
destroyed = true;
|
|
execCallback(err);
|
|
}
|
|
|
|
function execCallback(err, _socket) {
|
|
if (done) {
|
|
return;
|
|
}
|
|
done = true;
|
|
clearTimeout(timeout);
|
|
data.responseTime = data.endTime = Date.now();
|
|
socket.hostIp = resData.ip = resData.ip || LOCALHOST;
|
|
if (!err && !_socket) {
|
|
err = new Error('Aborted');
|
|
data.reqError = true;
|
|
resData.statusCode ='aborted';
|
|
reqData.body = util.getErrorStack(err);
|
|
reqEmitter.emit('abort', data);
|
|
} else if (err) {
|
|
data.resError = true;
|
|
resData.statusCode = resData.statusCode || 502;
|
|
resData.body = util.getErrorStack(err);
|
|
util.emitError(reqEmitter, data);
|
|
destroy(err);
|
|
} else {
|
|
reqEmitter.emit('end', data);
|
|
}
|
|
if (err) {
|
|
resData.headers = {'x-server':'whistle' };
|
|
}
|
|
pluginMgr.postStats(socket, _socket || resData);
|
|
}
|
|
});
|
|
}
|
|
|
|
function addReqInfo(req) {
|
|
var socket = req.socket;
|
|
var remoteData = socket._remoteDataInfo || tunnelTmplData.get(socket.remotePort + ':' + socket.localPort);
|
|
req.headers[config.HTTPS_FIELD] = 1;
|
|
if (remoteData) {
|
|
socket._remoteDataInfo = remoteData;
|
|
req.headers[config.CLIENT_IP_HEAD] = remoteData.clientIp || LOCALHOST;
|
|
req.headers[config.CLIENT_PORT_HEAD] = remoteData.clientPort;
|
|
if (remoteData.clientId) {
|
|
req.headers[config.CLIENT_ID_HEADER] = remoteData.clientId;
|
|
}
|
|
}
|
|
}
|
|
|
|
function getStatusMessage(obj) {
|
|
return obj.statusMessage || STATUS_CODES[obj.code] || 'Unknown';
|
|
}
|
|
|
|
function formatRawHeaders(obj, isH2) {
|
|
var headers = obj.headers;
|
|
if (isH2) {
|
|
return util.formatH2Headers(headers);
|
|
}
|
|
var rawNames = Array.isArray(obj.rawHeaders) && getRawHeaderNames(obj.rawHeaders);
|
|
return formatHeaders(headers, rawNames);
|
|
}
|
|
|
|
function toHttp1(req, res) {
|
|
var clientErr, client;
|
|
var handleError = function(e) {
|
|
if (e) {
|
|
client && client.abort();
|
|
client = null;
|
|
clientErr = clientErr || e;
|
|
}
|
|
};
|
|
addReqInfo(req);
|
|
req.stream && req.stream.on('error', handleError);
|
|
res.stream && res.stream.on('error', handleError);
|
|
req.on('error', handleError);
|
|
res.on('error', handleError);
|
|
var host = req.headers[':authority'];
|
|
var headers = req.headers;
|
|
if (host) {
|
|
req.headers.host = host;
|
|
var newHeaders = { host: host };
|
|
Object.keys(headers).forEach(function(name) {
|
|
if (name[0] !== ':') {
|
|
newHeaders[name] = headers[name];
|
|
}
|
|
});
|
|
headers = newHeaders;
|
|
} else {
|
|
headers = formatRawHeaders(req);
|
|
}
|
|
var options = util.parseUrl(util.getFullUrl(req));
|
|
var isH2 = req.httpVersion == 2;
|
|
options.protocol = null;
|
|
options.hostname = null;
|
|
options.agent = false;
|
|
options.host = config.host;
|
|
options.port = config.port;
|
|
options.headers = headers;
|
|
var s = req.socket || '';
|
|
s._sessionId = s._sessionId || util.getReqId();
|
|
headers[config.SESSION_ID_HEADER] = s._sessionId;
|
|
if (isH2) {
|
|
headers[config.ALPN_PROTOCOL_HEADER] = 'h2';
|
|
}
|
|
options.method = req.method;
|
|
client = http.request(options);
|
|
client.on('error', handleError);
|
|
client.on('response', function(svrRes) {
|
|
try {
|
|
var code = svrRes.statusCode;
|
|
res.writeHead(code, getStatusMessage(svrRes), formatRawHeaders(svrRes, isH2));
|
|
var write = res.write;
|
|
res.write = function(chunk) {
|
|
return write.call(res, chunk, handleError);
|
|
};
|
|
svrRes.pipe(res);
|
|
} catch (e) {
|
|
handleError(e);
|
|
}
|
|
});
|
|
req.pipe(client);
|
|
}
|
|
|
|
var handlers ={
|
|
request: function(req, res) {
|
|
addReqInfo(req);
|
|
server.emit('request', req, res);
|
|
},
|
|
upgrade: function(req, socket) {
|
|
addReqInfo(req);
|
|
server.emit('upgrade', req, socket);
|
|
}
|
|
};
|
|
var h2Handlers = config.enableH2 ? {
|
|
request: toHttp1,
|
|
upgrade: handlers.upgrade
|
|
} : handlers;
|
|
|
|
var CONNECT_RE = /^CONNECT\s+(\S+)\s+HTTP\/1.\d$/mi;
|
|
var HTTP_RE = /^\w+\s+\S+\s+HTTP\/1.\d$/mi;
|
|
|
|
function addClientInfo(socket, chunk, statusLine, clientIp, clientPort) {
|
|
var len = Buffer.byteLength(statusLine);
|
|
chunk = chunk.slice(len);
|
|
statusLine += '\r\n' + config.CLIENT_INFO_HEAD + ': ' + clientIp + ',' + clientPort;
|
|
var clientId = socket.headers[config.CLIENT_ID_HEADER];
|
|
if (clientId) {
|
|
statusLine += '\r\n' + config.TEMP_CLIENT_ID_HEADER + ': ' + clientId;
|
|
}
|
|
return Buffer.concat([Buffer.from(statusLine), chunk]);
|
|
}
|
|
|
|
module.exports = function(socket, hostname, next, isWebPort) {
|
|
var reqSocket, reqDestroyed, resDestroyed, timer;
|
|
var tunnelHost = socket.tunnelHost;
|
|
var headersStr, statusLine;
|
|
function destroy(err) {
|
|
if (reqSocket) {
|
|
if (resDestroyed) {
|
|
resDestroyed = true;
|
|
reqSocket.destroy(err);
|
|
}
|
|
} else if (reqDestroyed) {
|
|
reqDestroyed = true;
|
|
socket.destroy(err);
|
|
}
|
|
}
|
|
|
|
function abortIfUnavailable(socket) {
|
|
return socket.on('error', destroy);
|
|
}
|
|
|
|
socket.on('data', request);
|
|
socket.on('end', request);
|
|
var clientIp = socket.clientIp;
|
|
var clientPort = socket.clientPort;
|
|
var timeout = isWebPort ? null : (util.isLocalAddress(clientIp) ? LOCAL_TIMEOUT : TIMEOUT);
|
|
timer = timeout && setTimeout(request, timeout);
|
|
function request(chunk) {
|
|
clearTimeout(timer);
|
|
headersStr = chunk && chunk.toString();
|
|
if (chunk && CONNECT_RE.test(headersStr)) {
|
|
statusLine = RegExp['$&'];
|
|
chunk = addClientInfo(socket, chunk, statusLine, clientIp, clientPort);
|
|
socket.pause();
|
|
socket.removeListener('data', request);
|
|
socket.removeListener('end', request);
|
|
util.connect({
|
|
port: config.port,
|
|
host: LOCALHOST
|
|
}, function(err, s) {
|
|
if (err) {
|
|
return destroy(err);
|
|
}
|
|
reqSocket = s;
|
|
reqSocket.write(chunk);
|
|
reqSocket.pipe(socket).pipe(reqSocket);
|
|
abortIfUnavailable(reqSocket);
|
|
socket.resume();
|
|
});
|
|
return;
|
|
}
|
|
socket.removeListener('data', request);
|
|
socket.removeListener('end', request);
|
|
if (!chunk) {//没有数据
|
|
return isWebPort ? socket.destroy() : next(chunk);
|
|
}
|
|
if (HTTP_RE.test(headersStr)) {
|
|
statusLine = RegExp['$&'];
|
|
server.emit('connection', socket);
|
|
socket.emit('data', addClientInfo(socket, chunk, statusLine, clientIp, clientPort));
|
|
} else if (chunk[0] != 22) {
|
|
next(chunk);
|
|
} else {
|
|
var domain = hostname && getDomain(hostname);
|
|
var recieveData, authTimer;
|
|
var useSNI = (!domain || !serverAgent.existsServer(domain)) && checkSNI(chunk);
|
|
socket.pause();
|
|
var checkTimeout = function() {
|
|
authTimer = setTimeout(function() {
|
|
if (reqSocket) {
|
|
recieveData && reqSocket.removeListener('data', recieveData);
|
|
reqSocket.destroy();
|
|
}
|
|
if (useSNI) {
|
|
useSNI = false;
|
|
useNoSNIServer();
|
|
} else {
|
|
next(chunk);
|
|
}
|
|
}, AUTH_TIMEOUT);
|
|
};
|
|
var handleConnect = function(port) {
|
|
util.connect({
|
|
port: port,
|
|
host: LOCALHOST,
|
|
localAddress: LOCALHOST
|
|
}, function(err, s) {
|
|
if (err) {
|
|
return destroy(err);
|
|
}
|
|
reqSocket = s;
|
|
tunnelTmplData.set(reqSocket.localPort + ':' + reqSocket.remotePort, {
|
|
clientIp: clientIp,
|
|
clientPort: clientPort,
|
|
tunnelHost: tunnelHost,
|
|
clientId: socket.headers[config.CLIENT_ID_HEADER]
|
|
});
|
|
recieveData = function(data) {
|
|
clearTimeout(authTimer);
|
|
authTimer = null;
|
|
socket.write(data);
|
|
reqSocket.pipe(socket).pipe(reqSocket);
|
|
socket.resume();
|
|
};
|
|
reqSocket.once('data', recieveData);
|
|
reqSocket.write(chunk);
|
|
abortIfUnavailable(reqSocket);
|
|
});
|
|
};
|
|
var useNoSNIServer = function() {
|
|
checkTimeout();
|
|
serverAgent.createServer(domain, handlers, handleConnect);
|
|
};
|
|
|
|
if(useSNI) {
|
|
checkTimeout();
|
|
getSNIServer(h2Handlers, handleConnect, util.isDisableH2(socket));
|
|
} else {
|
|
useNoSNIServer();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
module.exports.setup = function(s, p) {
|
|
server = s;
|
|
proxy = p;
|
|
};
|
|
module.exports.handleWebsocket = handleWebsocket;
|
|
|
|
|