feat: added blacklist functionality for auto aliases

Author: jappyjan

README.md

@@ -21,6 +21,7 @@ The `moleculer-web` is the official API gateway service for [Moleculer](https://
 * support file uploading
 * alias names (with named parameters & REST shorthand)
 * whitelist
+* blacklist
 * multiple body parsers (json, urlencoded)
 * CORS headers
 * ETags

index.d.ts

@@ -367,6 +367,7 @@ declare module "moleculer-web" {
 		cors: CorsOptions;
 		etag: boolean | "weak" | "strong" | Function;
 		hasWhitelist: boolean;
+		hasBlacklist: boolean;
 		logging: boolean;
 		mappingPolicy: string;
 		middlewares: Function[];
@@ -375,6 +376,7 @@ declare module "moleculer-web" {
 		opts: any;
 		path: string;
 		whitelist: string[];
+		blacklist: string[];
 	}
 
 	type onBeforeCall = (
@@ -514,6 +516,7 @@ declare module "moleculer-web" {
 		 * The gateway will dynamically build the full routes from service schema.
 		 * Gateway will regenerate the routes every time a service joins or leaves the network.<br>
 		 * Use `whitelist` parameter to specify services that the Gateway should track and build the routes.
+		 * And `blacklist` parameter to specify services that the Gateway should not track and build the routes.
 		 * @see https://moleculer.services/docs/0.14/moleculer-web.html#Auto-alias
 		 */
 		autoAliases?: boolean;
@@ -597,6 +600,15 @@ declare module "moleculer-web" {
 		 * @see https://moleculer.services/docs/0.14/moleculer-web.html#Whitelist
 		 */
 		whitelist?: (string | RegExp)[];
+		/**
+		 * If you don’t want to publish all actions, you can filter them with blacklist option.<br>
+		 * Use match strings or regexp in list. To enable all actions, use "**" item.<br>
+		 * "posts.*": `Access any actions in 'posts' service`<br>
+		 * "users.list": `Access call only the 'users.list' action`<br>
+		 * /^math\.\w+$/: `Access any actions in 'math' service`<br>
+		 * @see https://moleculer.services/docs/0.14/moleculer-web.html#Blacklist
+		 */
+		blacklist?: (string | RegExp)[];
 	}
 
 	type APISettingServer =

src/index.js

@@ -496,6 +496,7 @@ module.exports = {
 		/**
 		 * Alias handler. Call action or call custom function
 		 * 	- check whitelist
+		 *  - check blacklist
 		 * 	- Rate limiter
 		 *  - Resolve endpoint
 		 *  - onBeforeCall
@@ -1154,6 +1155,23 @@ module.exports = {
 			}) != null;
 		},
 
+		/**
+		 * Check the action name in blacklist
+		 *
+		 * @param {Object} route
+		 * @param {String} action
+		 * @returns {Boolean}
+		 */
+		checkBlacklist(route, action) {
+			// Rewrite to for iterator (faster)
+			return (
+				route.blacklist.find((mask) => {
+					if (_.isString(mask)) return match(action, mask);
+					else if (_.isRegExp(mask)) return mask.test(action);
+				}) != null
+			);
+		},
+
 		/**
 		 * Resolve alias names
 		 *
@@ -1368,6 +1386,10 @@ module.exports = {
 			route.whitelist = opts.whitelist;
 			route.hasWhitelist = Array.isArray(route.whitelist);
 
+			// Handle blacklist
+			route.blacklist = opts.blacklist;
+			route.hasBlacklist = Array.isArray(route.blacklist);
+
 			// `onBeforeCall` handler
 			if (opts.onBeforeCall)
 				route.onBeforeCall = opts.onBeforeCall;
@@ -1522,6 +1544,18 @@ module.exports = {
 							// Check whitelist
 							if (route.hasWhitelist && !this.checkWhitelist(route, action.name)) return;
 
+							// Blacklist check
+							if (route.hasBlacklist) {
+								if (this.checkBlacklist(route, alias.action)) {
+									this.logger.debug(
+										`  The '${alias.action}' action is in the blacklist!`
+									);
+									throw new ServiceNotFoundError({
+										action: alias.action,
+									});
+								}
+							}
+
 							let restRoutes = [];
 							if (!_.isArray(action.rest)) {
 								restRoutes = [action.rest];

test/integration/index.spec.js

@@ -777,6 +777,125 @@ describe("Test whitelist", () => {
 	});
 });
 
+describe("Test blacklist", () => {
+	let broker;
+	let service;
+	let server;
+	beforeAll(() => {
+		[broker, service, server] = setup({
+			routes: [
+				{
+					path: "/api",
+					blacklist: ["test.greeter", "math.sub", /^test\.json/],
+				},
+			],
+		});
+		broker.loadService("./test/services/math.service");
+		return broker.start();
+	});
+	afterAll(() => broker.stop());
+	it("GET /api/test/hello", () => {
+		return request(server)
+			.get("/api/test/hello")
+			.then((res) => {
+				expect(res.statusCode).toBe(200);
+				expect(res.headers["content-type"]).toBe(
+					"application/json; charset=utf-8"
+				);
+				expect(res.body).toBe("Hello Moleculer");
+			});
+	});
+	it("GET /api/test/json", () => {
+		return request(server)
+			.get("/api/test/json")
+			.then((res) => {
+				expect(res.statusCode).toBe(404);
+				expect(res.headers["content-type"]).toBe(
+					"application/json; charset=utf-8"
+				);
+				expect(res.body).toEqual({
+					code: 404,
+					message: "Service 'test.json' is not found.",
+					name: "ServiceNotFoundError",
+					type: "SERVICE_NOT_FOUND",
+					data: {
+						action: "test.json",
+					},
+				});
+			});
+	});
+	it("GET /api/test/jsonArray", () => {
+		return request(server)
+			.get("/api/test/jsonArray")
+			.then((res) => {
+				expect(res.statusCode).toBe(404);
+				expect(res.headers["content-type"]).toBe(
+					"application/json; charset=utf-8"
+				);
+				expect(res.body).toEqual({
+					code: 404,
+					message: "Service 'test.jsonArray' is not found.",
+					name: "ServiceNotFoundError",
+					type: "SERVICE_NOT_FOUND",
+					data: {
+						action: "test.jsonArray",
+					},
+				});
+			});
+	});
+	it("GET /api/test/greeter", () => {
+		return request(server)
+			.get("/api/test/greeter")
+			.then((res) => {
+				expect(res.statusCode).toBe(404);
+				expect(res.headers["content-type"]).toBe(
+					"application/json; charset=utf-8"
+				);
+				expect(res.body).toEqual({
+					code: 404,
+					message: "Service 'test.greeter' is not found.",
+					name: "ServiceNotFoundError",
+					type: "SERVICE_NOT_FOUND",
+					data: {
+						action: "test.greeter",
+					},
+				});
+			});
+	});
+	it("GET /api/math.add", () => {
+		return request(server)
+			.get("/api/math.add")
+			.query({ a: 5, b: 8 })
+			.then((res) => {
+				expect(res.statusCode).toBe(200);
+				expect(res.headers["content-type"]).toBe(
+					"application/json; charset=utf-8"
+				);
+				expect(res.body).toBe(13);
+			});
+	});
+	it("GET /api/math.sub", () => {
+		return request(server)
+			.get("/api/math.sub")
+			.query({ a: 5, b: 8 })
+			.then((res) => {
+				expect(res.statusCode).toBe(404);
+				expect(res.headers["content-type"]).toBe(
+					"application/json; charset=utf-8"
+				);
+				expect(res.body).toEqual({
+					code: 404,
+					message: "Service 'math.sub' is not found.",
+					name: "ServiceNotFoundError",
+					type: "SERVICE_NOT_FOUND",
+					data: {
+						action: "math.sub",
+					},
+				});
+			});
+	});
+});
+
 describe("Test aliases", () => {
 	let broker;
 	let service;