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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 net_1 = __importDefault(require("net"));
const tls_1 = __importDefault(require("tls"));
const url_1 = __importDefault(require("url"));
const debug_1 = __importDefault(require("debug"));
const once_1 = __importDefault(require("@tootallnate/once"));
const agent_base_1 = require("agent-base");
const debug = debug_1.default('http-proxy-agent');
function isHTTPS(protocol) {
return typeof protocol === 'string' ? /^https:?$/i.test(protocol) : false;
}
/**
* The `HttpProxyAgent` implements an HTTP Agent subclass that connects
* to the specified "HTTP proxy server" in order to proxy HTTP requests.
*
* @api public
*/
class HttpProxyAgent 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 Error('an HTTP(S) proxy server `host` and `port` must be specified!');
}
debug('Creating new HttpProxyAgent instance: %o', opts);
super(opts);
const proxy = Object.assign({}, opts);
// If `true`, then connect to the proxy server over TLS.
// Defaults to `false`.
this.secureProxy = opts.secureProxy || isHTTPS(proxy.protocol);
// Prefer `hostname` over `host`, and set the `port` if needed.
proxy.host = proxy.hostname || proxy.host;
if (typeof proxy.port === 'string') {
proxy.port = parseInt(proxy.port, 10);
}
if (!proxy.port && proxy.host) {
proxy.port = this.secureProxy ? 443 : 80;
}
if (proxy.host && proxy.path) {
// If both a `host` and `path` are specified then it's most likely
// the result of a `url.parse()` call... we need to remove the
// `path` portion so that `net.connect()` doesn't attempt to open
// that as a Unix socket file.
delete proxy.path;
delete proxy.pathname;
}
this.proxy = proxy;
}
/**
* Called when the node-core HTTP client library is creating a
* new HTTP request.
*
* @api protected
*/
callback(req, opts) {
return __awaiter(this, void 0, void 0, function* () {
const { proxy, secureProxy } = this;
const parsed = url_1.default.parse(req.path);
if (!parsed.protocol) {
parsed.protocol = 'http:';
}
if (!parsed.hostname) {
parsed.hostname = opts.hostname || opts.host || null;
}
if (parsed.port == null && typeof opts.port) {
parsed.port = String(opts.port);
}
if (parsed.port === '80') {
// if port is 80, then we can remove the port so that the
// ":80" portion is not on the produced URL
delete parsed.port;
}
// Change the `http.ClientRequest` instance's "path" field
// to the absolute path of the URL that will be requested.
req.path = url_1.default.format(parsed);
// Inject the `Proxy-Authorization` header if necessary.
if (proxy.auth) {
req.setHeader('Proxy-Authorization', `Basic ${Buffer.from(proxy.auth).toString('base64')}`);
}
// Create a socket connection to the proxy server.
let socket;
if (secureProxy) {
debug('Creating `tls.Socket`: %o', proxy);
socket = tls_1.default.connect(proxy);
}
else {
debug('Creating `net.Socket`: %o', proxy);
socket = net_1.default.connect(proxy);
}
// At this point, the http ClientRequest's internal `_header` field
// might have already been set. If this is the case then we'll need
// to re-generate the string since we just changed the `req.path`.
if (req._header) {
let first;
let endOfHeaders;
debug('Regenerating stored HTTP header string for request');
req._header = null;
req._implicitHeader();
if (req.output && req.output.length > 0) {
// Node < 12
debug('Patching connection write() output buffer with updated header');
first = req.output[0];
endOfHeaders = first.indexOf('\r\n\r\n') + 4;
req.output[0] = req._header + first.substring(endOfHeaders);
debug('Output buffer: %o', req.output);
}
else if (req.outputData && req.outputData.length > 0) {
// Node >= 12
debug('Patching connection write() output buffer with updated header');
first = req.outputData[0].data;
endOfHeaders = first.indexOf('\r\n\r\n') + 4;
req.outputData[0].data =
req._header + first.substring(endOfHeaders);
debug('Output buffer: %o', req.outputData[0].data);
}
}
// Wait for the socket's `connect` event, so that this `callback()`
// function throws instead of the `http` request machinery. This is
// important for i.e. `PacProxyAgent` which determines a failed proxy
// connection via the `callback()` function throwing.
yield once_1.default(socket, 'connect');
return socket;
});
}
}
exports.default = HttpProxyAgent;
//# sourceMappingURL=agent.js.map
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