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"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const dns_1 = __importDefault(require("dns"));
const tls_1 = __importDefault(require("tls"));
const url_1 = __importDefault(require("url"));
const debug_1 = __importDefault(require("debug"));
const agent_base_1 = require("agent-base");
const socks_1 = require("socks");
const debug = debug_1.default('socks-proxy-agent');
function dnsLookup(host) {
return new Promise((resolve, reject) => {
dns_1.default.lookup(host, (err, res) => {
if (err) {
reject(err);
}
else {
resolve(res);
}
});
});
}
function parseSocksProxy(opts) {
let port = 0;
let lookup = false;
let type = 5;
// Prefer `hostname` over `host`, because of `url.parse()`
const host = opts.hostname || opts.host;
if (!host) {
throw new TypeError('No "host"');
}
if (typeof opts.port === 'number') {
port = opts.port;
}
else if (typeof opts.port === 'string') {
port = parseInt(opts.port, 10);
}
// From RFC 1928, Section 3: https://tools.ietf.org/html/rfc1928#section-3
// "The SOCKS service is conventionally located on TCP port 1080"
if (!port) {
port = 1080;
}
// figure out if we want socks v4 or v5, based on the "protocol" used.
// Defaults to 5.
if (opts.protocol) {
switch (opts.protocol) {
case 'socks4:':
lookup = true;
// pass through
case 'socks4a:':
type = 4;
break;
case 'socks5:':
lookup = true;
// pass through
case 'socks:': // no version specified, default to 5h
case 'socks5h:':
type = 5;
break;
default:
throw new TypeError(`A "socks" protocol must be specified! Got: ${opts.protocol}`);
}
}
if (typeof opts.type !== 'undefined') {
if (opts.type === 4 || opts.type === 5) {
type = opts.type;
}
else {
throw new TypeError(`"type" must be 4 or 5, got: ${opts.type}`);
}
}
const proxy = {
host,
port,
type
};
let userId = opts.userId;
let password = opts.password;
if (opts.auth) {
const auth = opts.auth.split(':');
userId = auth[0];
password = auth[1];
}
if (userId) {
Object.defineProperty(proxy, 'userId', {
value: userId,
enumerable: false
});
}
if (password) {
Object.defineProperty(proxy, 'password', {
value: password,
enumerable: false
});
}
return { lookup, proxy };
}
/**
* The `SocksProxyAgent`.
*
* @api public
*/
class SocksProxyAgent extends agent_base_1.Agent {
constructor(_opts) {
let opts;
if (typeof _opts === 'string') {
opts = url_1.default.parse(_opts);
}
else {
opts = _opts;
}
if (!opts) {
throw new TypeError('a SOCKS proxy server `host` and `port` must be specified!');
}
super(opts);
const parsedProxy = parseSocksProxy(opts);
this.lookup = parsedProxy.lookup;
this.proxy = parsedProxy.proxy;
}
/**
* Initiates a SOCKS connection to the specified SOCKS proxy server,
* which in turn connects to the specified remote host and port.
*
* @api protected
*/
callback(req, opts) {
return __awaiter(this, void 0, void 0, function* () {
const { lookup, proxy } = this;
let { host, port } = opts;
if (!host) {
throw new Error('No `host` defined!');
}
if (lookup) {
// Client-side DNS resolution for "4" and "5" socks proxy versions.
host = yield dnsLookup(host);
}
const socksOpts = {
proxy,
destination: { host, port },
command: 'connect'
};
debug('Creating socks proxy connection: %o', socksOpts);
const { socket } = yield socks_1.SocksClient.createConnection(socksOpts);
debug('Successfully created socks proxy connection');
if (opts.secureEndpoint) {
const servername = opts.servername || opts.host;
if (!servername) {
throw new Error('Could not determine "servername"');
}
// The proxy is connecting to a TLS server, so upgrade
// this socket connection to a TLS connection.
debug('Upgrading socket connection to TLS');
return tls_1.default.connect(Object.assign(Object.assign({}, omit(opts, 'host', 'hostname', 'path', 'port')), { socket,
servername }));
}
return socket;
});
}
}
exports.default = SocksProxyAgent;
function omit(obj, ...keys) {
const ret = {};
let key;
for (key in obj) {
if (!keys.includes(key)) {
ret[key] = obj[key];
}
}
return ret;
}
//# sourceMappingURL=agent.js.map
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