.-.-.-.-.-

src/index.ts000064400000021472151676726430007041 0ustar00import net from 'net';
import http from 'http';
import https from 'https';
import { Duplex } from 'stream';
import { EventEmitter } from 'events';
import createDebug from 'debug';
import promisify from './promisify';

const debug = createDebug('agent-base');

function isAgent(v: any): v is createAgent.AgentLike {
	return Boolean(v) && typeof v.addRequest === 'function';
}

function isSecureEndpoint(): boolean {
	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(opts?: createAgent.AgentOptions): createAgent.Agent;
function createAgent(
	callback: createAgent.AgentCallback,
	opts?: createAgent.AgentOptions
): createAgent.Agent;
function createAgent(
	callback?: createAgent.AgentCallback | createAgent.AgentOptions,
	opts?: createAgent.AgentOptions
) {
	return new createAgent.Agent(callback, opts);
}

namespace createAgent {
	export interface ClientRequest extends http.ClientRequest {
		_last?: boolean;
		_hadError?: boolean;
		method: string;
	}

export interface AgentRequestOptions {
		host?: string;
		path?: string;
		// `port` on `http.RequestOptions` can be a string or undefined,
		// but `net.TcpNetConnectOpts` expects only a number
		port: number;
	}

export interface HttpRequestOptions
		extends AgentRequestOptions,
			Omit<http.RequestOptions, keyof AgentRequestOptions> {
		secureEndpoint: false;
	}

export interface HttpsRequestOptions
		extends AgentRequestOptions,
			Omit<https.RequestOptions, keyof AgentRequestOptions> {
		secureEndpoint: true;
	}

export type RequestOptions = HttpRequestOptions | HttpsRequestOptions;

export type AgentLike = Pick<createAgent.Agent, 'addRequest'> | http.Agent;

export type AgentCallbackReturn = Duplex | AgentLike;

export type AgentCallbackCallback = (
		err?: Error | null,
		socket?: createAgent.AgentCallbackReturn
	) => void;

export type AgentCallbackPromise = (
		req: createAgent.ClientRequest,
		opts: createAgent.RequestOptions
	) =>
		| createAgent.AgentCallbackReturn
		| Promise<createAgent.AgentCallbackReturn>;

export type AgentCallback = typeof Agent.prototype.callback;

export type AgentOptions = {
		timeout?: number;
	};

/**
	 * Base `http.Agent` implementation.
	 * No pooling/keep-alive is implemented by default.
	 *
	 * @param {Function} callback
	 * @api public
	 */
	export class Agent extends EventEmitter {
		public timeout: number | null;
		public maxFreeSockets: number;
		public maxTotalSockets: number;
		public maxSockets: number;
		public sockets: {
			[key: string]: net.Socket[];
		};
		public freeSockets: {
			[key: string]: net.Socket[];
		};
		public requests: {
			[key: string]: http.IncomingMessage[];
		};
		public options: https.AgentOptions;
		private promisifiedCallback?: createAgent.AgentCallbackPromise;
		private explicitDefaultPort?: number;
		private explicitProtocol?: string;

constructor(
			callback?: createAgent.AgentCallback | createAgent.AgentOptions,
			_opts?: createAgent.AgentOptions
		) {
			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(): number {
			if (typeof this.explicitDefaultPort === 'number') {
				return this.explicitDefaultPort;
			}
			return isSecureEndpoint() ? 443 : 80;
		}

set defaultPort(v: number) {
			this.explicitDefaultPort = v;
		}

get protocol(): string {
			if (typeof this.explicitProtocol === 'string') {
				return this.explicitProtocol;
			}
			return isSecureEndpoint() ? 'https:' : 'http:';
		}

set protocol(v: string) {
			this.explicitProtocol = v;
		}

callback(
			req: createAgent.ClientRequest,
			opts: createAgent.RequestOptions,
			fn: createAgent.AgentCallbackCallback
		): void;
		callback(
			req: createAgent.ClientRequest,
			opts: createAgent.RequestOptions
		):
			| createAgent.AgentCallbackReturn
			| Promise<createAgent.AgentCallbackReturn>;
		callback(
			req: createAgent.ClientRequest,
			opts: createAgent.AgentOptions,
			fn?: createAgent.AgentCallbackCallback
		):
			| createAgent.AgentCallbackReturn
			| Promise<createAgent.AgentCallbackReturn>
			| void {
			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: ClientRequest, _opts: RequestOptions): void {
			const opts: RequestOptions = { ..._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: ReturnType<typeof setTimeout> | null = null;
			const timeoutMs = opts.timeout || this.timeout;

const onerror = (err: NodeJS.ErrnoException) => {
				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: NodeJS.ErrnoException = new Error(
					`A "socket" was not created for HTTP request before ${timeoutMs}ms`
				);
				err.code = 'ETIMEOUT';
				onerror(err);
			};

const callbackError = (err: NodeJS.ErrnoException) => {
				if (timedOut) return;
				if (timeoutId !== null) {
					clearTimeout(timeoutId);
					timeoutId = null;
				}
				onerror(err);
			};

const onsocket = (socket: AgentCallbackReturn) => {
				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 as createAgent.Agent).addRequest(req, opts);
					return;
				}

if (socket) {
					socket.once('free', () => {
						this.freeSocket(socket as net.Socket, opts);
					});
					req.onSocket(socket as net.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(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: net.Socket, opts: AgentOptions) {
			debug('Freeing socket %o %o', socket.constructor.name, opts);
			socket.destroy();
		}

destroy() {
			debug('Destroying agent %o', this.constructor.name);
		}
	}

// So that `instanceof` works correctly
	createAgent.prototype = createAgent.Agent.prototype;
}

export = createAgent;
src/promisify.ts000064400000001211151676726430007740 0ustar00import {
	Agent,
	ClientRequest,
	RequestOptions,
	AgentCallbackCallback,
	AgentCallbackPromise,
	AgentCallbackReturn
} from './index';

type LegacyCallback = (
	req: ClientRequest,
	opts: RequestOptions,
	fn: AgentCallbackCallback
) => void;

export default function promisify(fn: LegacyCallback): AgentCallbackPromise {
	return function(this: Agent, req: ClientRequest, opts: RequestOptions) {
		return new Promise((resolve, reject) => {
			fn.call(
				this,
				req,
				opts,
				(err: Error | null | undefined, rtn?: AgentCallbackReturn) => {
					if (err) {
						reject(err);
					} else {
						resolve(rtn);
					}
				}
			);
		});
	};
}
package.json000064400000003020151676726430007046 0ustar00{
  "_id": "agent-base@7.1.1",
  "_inBundle": true,
  "_location": "/npm/agent-base",
  "_phantomChildren": {},
  "_requiredBy": [
    "/npm/@npmcli/agent",
    "/npm/http-proxy-agent",
    "/npm/https-proxy-agent",
    "/npm/socks-proxy-agent"
  ],
  "author": {
    "name": "Nathan Rajlich",
    "email": "nathan@tootallnate.net",
    "url": "http://n8.io/"
  },
  "bugs": {
    "url": "https://github.com/TooTallNate/proxy-agents/issues"
  },
  "dependencies": {
    "debug": "^4.3.4"
  },
  "description": "Turn a function into an `http.Agent` instance",
  "devDependencies": {
    "@types/debug": "^4.1.7",
    "@types/jest": "^29.5.1",
    "@types/node": "^14.18.45",
    "@types/semver": "^7.3.13",
    "@types/ws": "^6.0.4",
    "async-listen": "^3.0.0",
    "jest": "^29.5.0",
    "ts-jest": "^29.1.0",
    "tsconfig": "0.0.0",
    "typescript": "^5.0.4",
    "ws": "^3.3.3"
  },
  "engines": {
    "node": ">= 14"
  },
  "files": [
    "dist"
  ],
  "homepage": "https://github.com/TooTallNate/proxy-agents#readme",
  "keywords": [
    "http",
    "agent",
    "base",
    "barebones",
    "https"
  ],
  "license": "MIT",
  "main": "./dist/index.js",
  "name": "agent-base",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/TooTallNate/proxy-agents.git",
    "directory": "packages/agent-base"
  },
  "scripts": {
    "build": "tsc",
    "lint": "eslint . --ext .ts",
    "pack": "node ../../scripts/pack.mjs",
    "test": "jest --env node --verbose --bail"
  },
  "types": "./dist/index.d.ts",
  "version": "7.1.1"
}
dist/src/promisify.js.map000064400000000763151676726430011460 0ustar00{"version":3,"file":"promisify.js","sourceRoot":"","sources":["../../src/promisify.ts"],"names":[],"mappings":";;AAeA,SAAwB,SAAS,CAAC,EAAkB;IACnD,OAAO,UAAsB,GAAkB,EAAE,IAAoB;QACpE,OAAO,IAAI,OAAO,CAAC,CAAC,OAAO,EAAE,MAAM,EAAE,EAAE;YACtC,EAAE,CAAC,IAAI,CACN,IAAI,EACJ,GAAG,EACH,IAAI,EACJ,CAAC,GAA6B,EAAE,GAAyB,EAAE,EAAE;gBAC5D,IAAI,GAAG,EAAE;oBACR,MAAM,CAAC,GAAG,CAAC,CAAC;iBACZ;qBAAM;oBACN,OAAO,CAAC,GAAG,CAAC,CAAC;iBACb;YACF,CAAC,CACD,CAAC;QACH,CAAC,CAAC,CAAC;IACJ,CAAC,CAAC;AACH,CAAC;AAjBD,4BAiBC"}dist/src/index.js000064400000017346151676726430007777 0ustar00"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;
//# sourceMappingURL=index.js.mapdist/src/promisify.d.ts000064400000000453151676726430011134 0ustar00import { ClientRequest, RequestOptions, AgentCallbackCallback, AgentCallbackPromise } from './index';
declare type LegacyCallback = (req: ClientRequest, opts: RequestOptions, fn: AgentCallbackCallback) => void;
export default function promisify(fn: LegacyCallback): AgentCallbackPromise;
export {};
dist/src/promisify.js000064400000000757151676726430010707 0ustar00"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function promisify(fn) {
    return function (req, opts) {
        return new Promise((resolve, reject) => {
            fn.call(this, req, opts, (err, rtn) => {
                if (err) {
                    reject(err);
                }
                else {
                    resolve(rtn);
                }
            });
        });
    };
}
exports.default = promisify;
//# sourceMappingURL=promisify.js.mapdist/src/index.d.ts000064400000006175151676726430010231 0ustar00/// <reference types="node" />
import net from 'net';
import http from 'http';
import https from 'https';
import { Duplex } from 'stream';
import { EventEmitter } from 'events';
declare function createAgent(opts?: createAgent.AgentOptions): createAgent.Agent;
declare function createAgent(callback: createAgent.AgentCallback, opts?: createAgent.AgentOptions): createAgent.Agent;
declare namespace createAgent {
    interface ClientRequest extends http.ClientRequest {
        _last?: boolean;
        _hadError?: boolean;
        method: string;
    }
    interface AgentRequestOptions {
        host?: string;
        path?: string;
        port: number;
    }
    interface HttpRequestOptions extends AgentRequestOptions, Omit<http.RequestOptions, keyof AgentRequestOptions> {
        secureEndpoint: false;
    }
    interface HttpsRequestOptions extends AgentRequestOptions, Omit<https.RequestOptions, keyof AgentRequestOptions> {
        secureEndpoint: true;
    }
    type RequestOptions = HttpRequestOptions | HttpsRequestOptions;
    type AgentLike = Pick<createAgent.Agent, 'addRequest'> | http.Agent;
    type AgentCallbackReturn = Duplex | AgentLike;
    type AgentCallbackCallback = (err?: Error | null, socket?: createAgent.AgentCallbackReturn) => void;
    type AgentCallbackPromise = (req: createAgent.ClientRequest, opts: createAgent.RequestOptions) => createAgent.AgentCallbackReturn | Promise<createAgent.AgentCallbackReturn>;
    type AgentCallback = typeof Agent.prototype.callback;
    type AgentOptions = {
        timeout?: number;
    };
    /**
     * Base `http.Agent` implementation.
     * No pooling/keep-alive is implemented by default.
     *
     * @param {Function} callback
     * @api public
     */
    class Agent extends EventEmitter {
        timeout: number | null;
        maxFreeSockets: number;
        maxTotalSockets: number;
        maxSockets: number;
        sockets: {
            [key: string]: net.Socket[];
        };
        freeSockets: {
            [key: string]: net.Socket[];
        };
        requests: {
            [key: string]: http.IncomingMessage[];
        };
        options: https.AgentOptions;
        private promisifiedCallback?;
        private explicitDefaultPort?;
        private explicitProtocol?;
        constructor(callback?: createAgent.AgentCallback | createAgent.AgentOptions, _opts?: createAgent.AgentOptions);
        get defaultPort(): number;
        set defaultPort(v: number);
        get protocol(): string;
        set protocol(v: string);
        callback(req: createAgent.ClientRequest, opts: createAgent.RequestOptions, fn: createAgent.AgentCallbackCallback): void;
        callback(req: createAgent.ClientRequest, opts: createAgent.RequestOptions): createAgent.AgentCallbackReturn | Promise<createAgent.AgentCallbackReturn>;
        /**
         * Called by node-core's "_http_client.js" module when creating
         * a new HTTP request with this Agent instance.
         *
         * @api public
         */
        addRequest(req: ClientRequest, _opts: RequestOptions): void;
        freeSocket(socket: net.Socket, opts: AgentOptions): void;
        destroy(): void;
    }
}
export = createAgent;
dist/src/index.js.map000064400000013300151676726430010535 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0ustar00agent-base
==========
### Turn a function into an [`http.Agent`][http.Agent] instance
[![Build Status](https://github.com/TooTallNate/node-agent-base/workflows/Node%20CI/badge.svg)](https://github.com/TooTallNate/node-agent-base/actions?workflow=Node+CI)

This module provides an `http.Agent` generator. That is, you pass it an async
callback function, and it returns a new `http.Agent` instance that will invoke the
given callback function when sending outbound HTTP requests.

#### Some subclasses:

Here's some more interesting uses of `agent-base`.
Send a pull request to list yours!

* [`http-proxy-agent`][http-proxy-agent]: An HTTP(s) proxy `http.Agent` implementation for HTTP endpoints
 * [`https-proxy-agent`][https-proxy-agent]: An HTTP(s) proxy `http.Agent` implementation for HTTPS endpoints
 * [`pac-proxy-agent`][pac-proxy-agent]: A PAC file proxy `http.Agent` implementation for HTTP and HTTPS
 * [`socks-proxy-agent`][socks-proxy-agent]: A SOCKS proxy `http.Agent` implementation for HTTP and HTTPS

Installation
------------

Install with `npm`:

``` bash
$ npm install agent-base
```

Example
-------

Here's a minimal example that creates a new `net.Socket` connection to the server
for every HTTP request (i.e. the equivalent of `agent: false` option):

```js
var net = require('net');
var tls = require('tls');
var url = require('url');
var http = require('http');
var agent = require('agent-base');

var endpoint = 'http://nodejs.org/api/';
var parsed = url.parse(endpoint);

// This is the important part!
parsed.agent = agent(function (req, opts) {
  var socket;
  // `secureEndpoint` is true when using the https module
  if (opts.secureEndpoint) {
    socket = tls.connect(opts);
  } else {
    socket = net.connect(opts);
  }
  return socket;
});

// Everything else works just like normal...
http.get(parsed, function (res) {
  console.log('"response" event!', res.headers);
  res.pipe(process.stdout);
});
```

Returning a Promise or using an `async` function is also supported:

```js
agent(async function (req, opts) {
  await sleep(1000);
  // etc…
});
```

Return another `http.Agent` instance to "pass through" the responsibility
for that HTTP request to that agent:

```js
agent(function (req, opts) {
  return opts.secureEndpoint ? https.globalAgent : http.globalAgent;
});
```

API
---

## Agent(Function callback[, Object options]) → [http.Agent][]

Creates a base `http.Agent` that will execute the callback function `callback`
for every HTTP request that it is used as the `agent` for. The callback function
is responsible for creating a `stream.Duplex` instance of some kind that will be
used as the underlying socket in the HTTP request.

The `options` object accepts the following properties:

* `timeout` - Number - Timeout for the `callback()` function in milliseconds. Defaults to Infinity (optional).

The callback function should have the following signature:

### callback(http.ClientRequest req, Object options, Function cb) → undefined

The ClientRequest `req` can be accessed to read request headers and
and the path, etc. The `options` object contains the options passed
to the `http.request()`/`https.request()` function call, and is formatted
to be directly passed to `net.connect()`/`tls.connect()`, or however
else you want a Socket to be created. Pass the created socket to
the callback function `cb` once created, and the HTTP request will
continue to proceed.

If the `https` module is used to invoke the HTTP request, then the
`secureEndpoint` property on `options` _will be set to `true`_.

License
-------

(The MIT License)

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

[http-proxy-agent]: https://github.com/TooTallNate/node-http-proxy-agent
[https-proxy-agent]: https://github.com/TooTallNate/node-https-proxy-agent
[pac-proxy-agent]: https://github.com/TooTallNate/node-pac-proxy-agent
[socks-proxy-agent]: https://github.com/TooTallNate/node-socks-proxy-agent
[http.Agent]: https://nodejs.org/api/http.html#http_class_http_agent
LICENSE000064400000002115151701435270005555 0ustar00(The MIT License)

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.dist/index.js000064400000016167151701435270007174 0ustar00"use strict";
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};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Agent = void 0;
const net = __importStar(require("net"));
const http = __importStar(require("http"));
const https_1 = require("https");
__exportStar(require("./helpers"), exports);
const INTERNAL = Symbol('AgentBaseInternalState');
class Agent extends http.Agent {
    constructor(opts) {
        super(opts);
        this[INTERNAL] = {};
    }
    /**
     * Determine whether this is an `http` or `https` request.
     */
    isSecureEndpoint(options) {
        if (options) {
            // First check the `secureEndpoint` property explicitly, since this
            // means that a parent `Agent` is "passing through" to this instance.
            // eslint-disable-next-line @typescript-eslint/no-explicit-any
            if (typeof options.secureEndpoint === 'boolean') {
                return options.secureEndpoint;
            }
            // If no explicit `secure` endpoint, check if `protocol` property is
            // set. This will usually be the case since using a full string URL
            // or `URL` instance should be the most common usage.
            if (typeof options.protocol === 'string') {
                return options.protocol === 'https:';
            }
        }
        // Finally, if no `protocol` property was set, then fall back to
        // checking the stack trace of the current call stack, and try to
        // detect the "https" module.
        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);
    }
    // In order to support async signatures in `connect()` and Node's native
    // connection pooling in `http.Agent`, the array of sockets for each origin
    // has to be updated synchronously. This is so the length of the array is
    // accurate when `addRequest()` is next called. We achieve this by creating a
    // fake socket and adding it to `sockets[origin]` and incrementing
    // `totalSocketCount`.
    incrementSockets(name) {
        // If `maxSockets` and `maxTotalSockets` are both Infinity then there is no
        // need to create a fake socket because Node.js native connection pooling
        // will never be invoked.
        if (this.maxSockets === Infinity && this.maxTotalSockets === Infinity) {
            return null;
        }
        // All instances of `sockets` are expected TypeScript errors. The
        // alternative is to add it as a private property of this class but that
        // will break TypeScript subclassing.
        if (!this.sockets[name]) {
            // @ts-expect-error `sockets` is readonly in `@types/node`
            this.sockets[name] = [];
        }
        const fakeSocket = new net.Socket({ writable: false });
        this.sockets[name].push(fakeSocket);
        // @ts-expect-error `totalSocketCount` isn't defined in `@types/node`
        this.totalSocketCount++;
        return fakeSocket;
    }
    decrementSockets(name, socket) {
        if (!this.sockets[name] || socket === null) {
            return;
        }
        const sockets = this.sockets[name];
        const index = sockets.indexOf(socket);
        if (index !== -1) {
            sockets.splice(index, 1);
            // @ts-expect-error  `totalSocketCount` isn't defined in `@types/node`
            this.totalSocketCount--;
            if (sockets.length === 0) {
                // @ts-expect-error `sockets` is readonly in `@types/node`
                delete this.sockets[name];
            }
        }
    }
    // In order to properly update the socket pool, we need to call `getName()` on
    // the core `https.Agent` if it is a secureEndpoint.
    getName(options) {
        const secureEndpoint = typeof options.secureEndpoint === 'boolean'
            ? options.secureEndpoint
            : this.isSecureEndpoint(options);
        if (secureEndpoint) {
            // @ts-expect-error `getName()` isn't defined in `@types/node`
            return https_1.Agent.prototype.getName.call(this, options);
        }
        // @ts-expect-error `getName()` isn't defined in `@types/node`
        return super.getName(options);
    }
    createSocket(req, options, cb) {
        const connectOpts = {
            ...options,
            secureEndpoint: this.isSecureEndpoint(options),
        };
        const name = this.getName(connectOpts);
        const fakeSocket = this.incrementSockets(name);
        Promise.resolve()
            .then(() => this.connect(req, connectOpts))
            .then((socket) => {
            this.decrementSockets(name, fakeSocket);
            if (socket instanceof http.Agent) {
                // @ts-expect-error `addRequest()` isn't defined in `@types/node`
                return socket.addRequest(req, connectOpts);
            }
            this[INTERNAL].currentSocket = socket;
            // @ts-expect-error `createSocket()` isn't defined in `@types/node`
            super.createSocket(req, options, cb);
        }, (err) => {
            this.decrementSockets(name, fakeSocket);
            cb(err);
        });
    }
    createConnection() {
        const socket = this[INTERNAL].currentSocket;
        this[INTERNAL].currentSocket = undefined;
        if (!socket) {
            throw new Error('No socket was returned in the `connect()` function');
        }
        return socket;
    }
    get defaultPort() {
        return (this[INTERNAL].defaultPort ??
            (this.protocol === 'https:' ? 443 : 80));
    }
    set defaultPort(v) {
        if (this[INTERNAL]) {
            this[INTERNAL].defaultPort = v;
        }
    }
    get protocol() {
        return (this[INTERNAL].protocol ??
            (this.isSecureEndpoint() ? 'https:' : 'http:'));
    }
    set protocol(v) {
        if (this[INTERNAL]) {
            this[INTERNAL].protocol = v;
        }
    }
}
exports.Agent = Agent;
//# sourceMappingURL=index.js.mapdist/helpers.js000064400000004412151701435270007515 0ustar00"use strict";
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    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.req = exports.json = exports.toBuffer = void 0;
const http = __importStar(require("http"));
const https = __importStar(require("https"));
async function toBuffer(stream) {
    let length = 0;
    const chunks = [];
    for await (const chunk of stream) {
        length += chunk.length;
        chunks.push(chunk);
    }
    return Buffer.concat(chunks, length);
}
exports.toBuffer = toBuffer;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
async function json(stream) {
    const buf = await toBuffer(stream);
    const str = buf.toString('utf8');
    try {
        return JSON.parse(str);
    }
    catch (_err) {
        const err = _err;
        err.message += ` (input: ${str})`;
        throw err;
    }
}
exports.json = json;
function req(url, opts = {}) {
    const href = typeof url === 'string' ? url : url.href;
    const req = (href.startsWith('https:') ? https : http).request(url, opts);
    const promise = new Promise((resolve, reject) => {
        req
            .once('response', resolve)
            .once('error', reject)
            .end();
    });
    req.then = promise.then.bind(promise);
    return req;
}
exports.req = req;
//# sourceMappingURL=helpers.js.map

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