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Mini Shell
Mini Shell
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
const events_1 = require("events");
const debug_1 = __importDefault(require("debug"));
const promisify_1 = __importDefault(require("./promisify"));
const debug = debug_1.default('agent-base');
function isAgent(v) {
return Boolean(v) && typeof v.addRequest === 'function';
}
function isSecureEndpoint() {
const { stack } = new Error();
if (typeof stack !== 'string')
return false;
return stack.split('\n').some(l => l.indexOf('(https.js:') !== -1 || l.indexOf('node:https:') !== -1);
}
function createAgent(callback, opts) {
return new createAgent.Agent(callback, opts);
}
(function (createAgent) {
/**
* Base `http.Agent` implementation.
* No pooling/keep-alive is implemented by default.
*
* @param {Function} callback
* @api public
*/
class Agent extends events_1.EventEmitter {
constructor(callback, _opts) {
super();
let opts = _opts;
if (typeof callback === 'function') {
this.callback = callback;
}
else if (callback) {
opts = callback;
}
// Timeout for the socket to be returned from the callback
this.timeout = null;
if (opts && typeof opts.timeout === 'number') {
this.timeout = opts.timeout;
}
// These aren't actually used by `agent-base`, but are required
// for the TypeScript definition files in `@types/node` :/
this.maxFreeSockets = 1;
this.maxSockets = 1;
this.maxTotalSockets = Infinity;
this.sockets = {};
this.freeSockets = {};
this.requests = {};
this.options = {};
}
get defaultPort() {
if (typeof this.explicitDefaultPort === 'number') {
return this.explicitDefaultPort;
}
return isSecureEndpoint() ? 443 : 80;
}
set defaultPort(v) {
this.explicitDefaultPort = v;
}
get protocol() {
if (typeof this.explicitProtocol === 'string') {
return this.explicitProtocol;
}
return isSecureEndpoint() ? 'https:' : 'http:';
}
set protocol(v) {
this.explicitProtocol = v;
}
callback(req, opts, fn) {
throw new Error('"agent-base" has no default implementation, you must subclass and override `callback()`');
}
/**
* Called by node-core's "_http_client.js" module when creating
* a new HTTP request with this Agent instance.
*
* @api public
*/
addRequest(req, _opts) {
const opts = Object.assign({}, _opts);
if (typeof opts.secureEndpoint !== 'boolean') {
opts.secureEndpoint = isSecureEndpoint();
}
if (opts.host == null) {
opts.host = 'localhost';
}
if (opts.port == null) {
opts.port = opts.secureEndpoint ? 443 : 80;
}
if (opts.protocol == null) {
opts.protocol = opts.secureEndpoint ? 'https:' : 'http:';
}
if (opts.host && opts.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 opts.path;
}
delete opts.agent;
delete opts.hostname;
delete opts._defaultAgent;
delete opts.defaultPort;
delete opts.createConnection;
// Hint to use "Connection: close"
// XXX: non-documented `http` module API :(
req._last = true;
req.shouldKeepAlive = false;
let timedOut = false;
let timeoutId = null;
const timeoutMs = opts.timeout || this.timeout;
const onerror = (err) => {
if (req._hadError)
return;
req.emit('error', err);
// For Safety. Some additional errors might fire later on
// and we need to make sure we don't double-fire the error event.
req._hadError = true;
};
const ontimeout = () => {
timeoutId = null;
timedOut = true;
const err = new Error(`A "socket" was not created for HTTP request before ${timeoutMs}ms`);
err.code = 'ETIMEOUT';
onerror(err);
};
const callbackError = (err) => {
if (timedOut)
return;
if (timeoutId !== null) {
clearTimeout(timeoutId);
timeoutId = null;
}
onerror(err);
};
const onsocket = (socket) => {
if (timedOut)
return;
if (timeoutId != null) {
clearTimeout(timeoutId);
timeoutId = null;
}
if (isAgent(socket)) {
// `socket` is actually an `http.Agent` instance, so
// relinquish responsibility for this `req` to the Agent
// from here on
debug('Callback returned another Agent instance %o', socket.constructor.name);
socket.addRequest(req, opts);
return;
}
if (socket) {
socket.once('free', () => {
this.freeSocket(socket, opts);
});
req.onSocket(socket);
return;
}
const err = new Error(`no Duplex stream was returned to agent-base for \`${req.method} ${req.path}\``);
onerror(err);
};
if (typeof this.callback !== 'function') {
onerror(new Error('`callback` is not defined'));
return;
}
if (!this.promisifiedCallback) {
if (this.callback.length >= 3) {
debug('Converting legacy callback function to promise');
this.promisifiedCallback = promisify_1.default(this.callback);
}
else {
this.promisifiedCallback = this.callback;
}
}
if (typeof timeoutMs === 'number' && timeoutMs > 0) {
timeoutId = setTimeout(ontimeout, timeoutMs);
}
if ('port' in opts && typeof opts.port !== 'number') {
opts.port = Number(opts.port);
}
try {
debug('Resolving socket for %o request: %o', opts.protocol, `${req.method} ${req.path}`);
Promise.resolve(this.promisifiedCallback(req, opts)).then(onsocket, callbackError);
}
catch (err) {
Promise.reject(err).catch(callbackError);
}
}
freeSocket(socket, opts) {
debug('Freeing socket %o %o', socket.constructor.name, opts);
socket.destroy();
}
destroy() {
debug('Destroying agent %o', this.constructor.name);
}
}
createAgent.Agent = Agent;
// So that `instanceof` works correctly
createAgent.prototype = createAgent.Agent.prototype;
})(createAgent || (createAgent = {}));
module.exports = createAgent;
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Zerion Mini Shell 1.0