Fix quit command to work gracefully

core/modules/commands/quit.js

@@ -25,9 +25,8 @@ var Command = function(params,commander,callback) {
 };
 
 Command.prototype.execute = function() {
-	// The Node.js docs are very clear that exiting in this way can be dangerous because pending I/O is cancelled.
-	// TODO: stop the server listeners explicitly so that Node.js will exit the process naturally.
-	process.exit();
+	// We don't actually quit, we just issue the "th-quit" hook to give listeners a chance to exit
+	$tw.hooks.invokeHook("th-quit");
 	return null;
 };
 

core/modules/server/server.js

@@ -359,6 +359,11 @@ Server.prototype.listen = function(port,host,prefix) {
 	}
 	// Display the port number after we've started listening (the port number might have been specified as zero, in which case we will get an assigned port)
 	server.on("listening",function() {
+		// Stop listening when we get the "th-quit" hook
+		$tw.hooks.addHook("th-quit",function() {
+			server.close();
+		});
+		// Log listening details
 		var address = server.address(),
 			url = self.protocol + "://" + (address.family === "IPv6" ? "[" + address.address + "]" : address.address) + ":" + address.port + prefix;
 		$tw.utils.log("Serving on " + url,"brown/orange");

plugins/tiddlywiki/multiwikiserver/modules/mws-server.js

@@ -466,6 +466,11 @@ Server.prototype.listen = function(port,host,prefix,options) {
 	});
 	// Display the port number after we've started listening (the port number might have been specified as zero, in which case we will get an assigned port)
 	server.on("listening",function() {
+		// Stop listening when we get the "th-quit" hook
+		$tw.hooks.addHook("th-quit",function() {
+			server.close();
+		});
+		// Log listening details
 		var address = server.address(),
 			url = self.protocol + "://" + (address.family === "IPv6" ? "[" + address.address + "]" : address.address) + ":" + address.port + prefix;
 		$tw.utils.log("Serving on " + url,"brown/orange");