* first action! (#1)

node_modules/got/source/utils/timed-out.js

@@ -0,0 +1,160 @@
+'use strict';
+const net = require('net');
+
+class TimeoutError extends Error {
+	constructor(threshold, event) {
+		super(`Timeout awaiting '${event}' for ${threshold}ms`);
+		this.name = 'TimeoutError';
+		this.code = 'ETIMEDOUT';
+		this.event = event;
+	}
+}
+
+const reentry = Symbol('reentry');
+
+const noop = () => {};
+
+module.exports = (request, delays, options) => {
+	/* istanbul ignore next: this makes sure timed-out isn't called twice */
+	if (request[reentry]) {
+		return;
+	}
+
+	request[reentry] = true;
+
+	let stopNewTimeouts = false;
+
+	const addTimeout = (delay, callback, ...args) => {
+		// An error had been thrown before. Going further would result in uncaught errors.
+		// See https://github.com/sindresorhus/got/issues/631#issuecomment-435675051
+		if (stopNewTimeouts) {
+			return noop;
+		}
+
+		// Event loop order is timers, poll, immediates.
+		// The timed event may emit during the current tick poll phase, so
+		// defer calling the handler until the poll phase completes.
+		let immediate;
+		const timeout = setTimeout(() => {
+			immediate = setImmediate(callback, delay, ...args);
+			/* istanbul ignore next: added in node v9.7.0 */
+			if (immediate.unref) {
+				immediate.unref();
+			}
+		}, delay);
+
+		/* istanbul ignore next: in order to support electron renderer */
+		if (timeout.unref) {
+			timeout.unref();
+		}
+
+		const cancel = () => {
+			clearTimeout(timeout);
+			clearImmediate(immediate);
+		};
+
+		cancelers.push(cancel);
+
+		return cancel;
+	};
+
+	const {host, hostname} = options;
+	const timeoutHandler = (delay, event) => {
+		request.emit('error', new TimeoutError(delay, event));
+		request.once('error', () => {}); // Ignore the `socket hung up` error made by request.abort()
+
+		request.abort();
+	};
+
+	const cancelers = [];
+	const cancelTimeouts = () => {
+		stopNewTimeouts = true;
+		cancelers.forEach(cancelTimeout => cancelTimeout());
+	};
+
+	request.once('error', cancelTimeouts);
+	request.once('response', response => {
+		response.once('end', cancelTimeouts);
+	});
+
+	if (delays.request !== undefined) {
+		addTimeout(delays.request, timeoutHandler, 'request');
+	}
+
+	if (delays.socket !== undefined) {
+		const socketTimeoutHandler = () => {
+			timeoutHandler(delays.socket, 'socket');
+		};
+
+		request.setTimeout(delays.socket, socketTimeoutHandler);
+
+		// `request.setTimeout(0)` causes a memory leak.
+		// We can just remove the listener and forget about the timer - it's unreffed.
+		// See https://github.com/sindresorhus/got/issues/690
+		cancelers.push(() => request.removeListener('timeout', socketTimeoutHandler));
+	}
+
+	if (delays.lookup !== undefined && !request.socketPath && !net.isIP(hostname || host)) {
+		request.once('socket', socket => {
+			/* istanbul ignore next: hard to test */
+			if (socket.connecting) {
+				const cancelTimeout = addTimeout(delays.lookup, timeoutHandler, 'lookup');
+				socket.once('lookup', cancelTimeout);
+			}
+		});
+	}
+
+	if (delays.connect !== undefined) {
+		request.once('socket', socket => {
+			/* istanbul ignore next: hard to test */
+			if (socket.connecting) {
+				const timeConnect = () => addTimeout(delays.connect, timeoutHandler, 'connect');
+
+				if (request.socketPath || net.isIP(hostname || host)) {
+					socket.once('connect', timeConnect());
+				} else {
+					socket.once('lookup', error => {
+						if (error === null) {
+							socket.once('connect', timeConnect());
+						}
+					});
+				}
+			}
+		});
+	}
+
+	if (delays.secureConnect !== undefined && options.protocol === 'https:') {
+		request.once('socket', socket => {
+			/* istanbul ignore next: hard to test */
+			if (socket.connecting) {
+				socket.once('connect', () => {
+					const cancelTimeout = addTimeout(delays.secureConnect, timeoutHandler, 'secureConnect');
+					socket.once('secureConnect', cancelTimeout);
+				});
+			}
+		});
+	}
+
+	if (delays.send !== undefined) {
+		request.once('socket', socket => {
+			const timeRequest = () => addTimeout(delays.send, timeoutHandler, 'send');
+			/* istanbul ignore next: hard to test */
+			if (socket.connecting) {
+				socket.once('connect', () => {
+					request.once('upload-complete', timeRequest());
+				});
+			} else {
+				request.once('upload-complete', timeRequest());
+			}
+		});
+	}
+
+	if (delays.response !== undefined) {
+		request.once('upload-complete', () => {
+			const cancelTimeout = addTimeout(delays.response, timeoutHandler, 'response');
+			request.once('response', cancelTimeout);
+		});
+	}
+};
+
+module.exports.TimeoutError = TimeoutError;