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express-server/node_modules/timed-out/index.js

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+'use strict';
+
+module.exports = function (req, time) {
+	if (req.timeoutTimer) {
+		return req;
+	}
+
+	var delays = isNaN(time) ? time : {socket: time, connect: time};
+	var host = req._headers ? (' to ' + req._headers.host) : '';
+
+	if (delays.connect !== undefined) {
+		req.timeoutTimer = setTimeout(function timeoutHandler() {
+			req.abort();
+			var e = new Error('Connection timed out on request' + host);
+			e.code = 'ETIMEDOUT';
+			req.emit('error', e);
+		}, delays.connect);
+	}
+
+	// Clear the connection timeout timer once a socket is assigned to the
+	// request and is connected.
+	req.on('socket', function assign(socket) {
+		// Socket may come from Agent pool and may be already connected.
+		if (!(socket.connecting || socket._connecting)) {
+			connect();
+			return;
+		}
+
+		socket.once('connect', connect);
+	});
+
+	function clear() {
+		if (req.timeoutTimer) {
+			clearTimeout(req.timeoutTimer);
+			req.timeoutTimer = null;
+		}
+	}
+
+	function connect() {
+		clear();
+
+		if (delays.socket !== undefined) {
+			// Abort the request if there is no activity on the socket for more
+			// than `delays.socket` milliseconds.
+			req.setTimeout(delays.socket, function socketTimeoutHandler() {
+				req.abort();
+				var e = new Error('Socket timed out on request' + host);
+				e.code = 'ESOCKETTIMEDOUT';
+				req.emit('error', e);
+			});
+		}
+	}
+
+	return req.on('error', clear);
+};