'use strict';
Object.defineProperty(exports, “__esModule”, {
value: true
});
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (“value” in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _http = require('http');
var _http2 = _interopRequireDefault(_http);
var _handler_base = require('./handler_base');
var _handler_base2 = _interopRequireDefault(_handler_base);
var _tools = require('./tools');
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(“Cannot call a class as a function”); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError(“this hasn't been initialised - super() hasn't been called”); } return call && (typeof call === “object” || typeof call === “function”) ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== “function” && superClass !== null) { throw new TypeError(“Super expression must either be null or a function, not ” + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
/**
* Represents a connection from source client to an external proxy using HTTP CONNECT tunnel. */
var HandlerTunnelChain = function (_HandlerBase) {
_inherits(HandlerTunnelChain, _HandlerBase); function HandlerTunnelChain(options) { _classCallCheck(this, HandlerTunnelChain); var _this = _possibleConstructorReturn(this, (HandlerTunnelChain.__proto__ || Object.getPrototypeOf(HandlerTunnelChain)).call(this, options)); if (!_this.upstreamProxyUrlParsed) throw new Error('The "upstreamProxyUrlParsed" option is required'); _this.bindHandlersToThis(['onTrgRequestConnect', 'onTrgRequestAbort', 'onTrgRequestError']); return _this; } _createClass(HandlerTunnelChain, [{ key: 'run', value: function run() { this.log('Connecting to upstream proxy...'); var targetHost = this.trgParsed.hostname + ':' + this.trgParsed.port; var options = { method: 'CONNECT', hostname: this.upstreamProxyUrlParsed.hostname, port: this.upstreamProxyUrlParsed.port, path: targetHost, headers: { Host: targetHost } }; (0, _tools.maybeAddProxyAuthorizationHeader)(this.upstreamProxyUrlParsed, options.headers); this.trgRequest = _http2.default.request(options); this.trgRequest.once('connect', this.onTrgRequestConnect); this.trgRequest.once('abort', this.onTrgRequestAbort); this.trgRequest.once('socket', this.onTrgSocket); this.trgRequest.on('error', this.onTrgRequestError); // Send the data this.trgRequest.end(); } }, { key: 'onTrgRequestConnect', value: function onTrgRequestConnect(response, socket, head) { if (this.isClosed) return; this.log('Connected to upstream proxy'); if (this.checkUpstreamProxy407(response)) return; this.srcGotResponse = true; this.srcResponse.removeListener('finish', this.onSrcResponseFinish); this.srcResponse.writeHead(200, 'Connection Established'); // HACK: force a flush of the HTTP header. This is to ensure 'head' is empty to avoid // assert at https://github.com/request/tunnel-agent/blob/master/index.js#L160 // See also https://github.com/nodejs/node/blob/master/lib/_http_outgoing.js#L217 this.srcResponse._send(''); // relinquish control of the `socket` from the ServerResponse instance this.srcResponse.detachSocket(this.srcSocket); // nullify the ServerResponse object, so that it can be cleaned // up before this socket proxying is completed this.srcResponse = null; // Forward pre-parsed parts of the first packets (if any) if (head && head.length > 0) { this.srcSocket.write(head); } if (this.srcHead && this.srcHead.length > 0) { this.trgSocket.write(this.srcHead); } // Setup bi-directional tunnel this.trgSocket.pipe(this.srcSocket); this.srcSocket.pipe(this.trgSocket); } }, { key: 'onTrgRequestAbort', value: function onTrgRequestAbort() { if (this.isClosed) return; this.log('Target aborted'); this.close(); } }, { key: 'onTrgRequestError', value: function onTrgRequestError(err) { if (this.isClosed) return; this.log('Target request failed: ' + (err.stack || err)); this.fail(err); } }]); return HandlerTunnelChain;
}(_handler_base2.default);
exports.default = HandlerTunnelChain;