Short URLs

package.json

@@ -318,6 +318,7 @@
     "puid": "1.0.7",
     "puppeteer": "^8.0.0",
     "query-string": "^6.13.2",
+    "random-word-slugs": "^0.0.5",
     "raw-loader": "^3.1.0",
     "rbush": "^3.0.1",
     "re-resizable": "^6.1.1",

src/plugins/share/common/url_service/__tests__/setup.ts

@@ -37,6 +37,22 @@ export const urlServiceTestSetup = (partialDeps: Partial<UrlServiceDependencies>
     getUrl: async () => {
       throw new Error('not implemented');
     },
+    shortUrls: {
+      get: () => ({
+        create: async () => {
+          throw new Error('Not implemented.');
+        },
+        get: async () => {
+          throw new Error('Not implemented.');
+        },
+        delete: async () => {
+          throw new Error('Not implemented.');
+        },
+        resolve: async () => {
+          throw new Error('Not implemented.');
+        },
+      }),
+    },
     ...partialDeps,
   };
   const service = new UrlService(deps);

src/plugins/share/common/url_service/index.ts

@@ -8,3 +8,4 @@
 
 export * from './url_service';
 export * from './locators';
+export * from './short_urls';

src/plugins/share/common/url_service/locators/legacy_short_url_locator.ts

@@ -0,0 +1,47 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import type { SerializableRecord } from '@kbn/utility-types';
+import type { KibanaLocation, LocatorDefinition } from '../../url_service';
+import { shortUrlAssertValid } from './short_url_assert_valid';
+
+export const LEGACY_SHORT_URL_LOCATOR_ID = 'LEGACY_SHORT_URL_LOCATOR';
+
+export interface LegacyShortUrlLocatorParams extends SerializableRecord {
+  url: string;
+}
+
+export class LegacyShortUrlLocatorDefinition
+  implements LocatorDefinition<LegacyShortUrlLocatorParams>
+{
+  public readonly id = LEGACY_SHORT_URL_LOCATOR_ID;
+
+  public async getLocation(params: LegacyShortUrlLocatorParams): Promise<KibanaLocation> {
+    const { url } = params;
+
+    shortUrlAssertValid(url);
+
+    const match = url.match(/^.*\/app\/([^\/#]+)(.+)$/);
+
+    if (!match) {
+      throw new Error('Unexpected URL path.');
+    }
+
+    const [, app, path] = match;
+
+    if (!app || !path) {
+      throw new Error('Could not parse URL path.');
+    }
+
+    return {
+      app,
+      path,
+      state: {},
+    };
+  }
+}

src/plugins/share/common/url_service/locators/locator.ts

@@ -43,12 +43,14 @@ export interface LocatorDependencies {
 }
 
 export class Locator<P extends SerializableRecord> implements LocatorPublic<P> {
+  public readonly id: string;
   public readonly migrations: PersistableState<P>['migrations'];
 
   constructor(
     public readonly definition: LocatorDefinition<P>,
     protected readonly deps: LocatorDependencies
   ) {
+    this.id = definition.id;
     this.migrations = definition.migrations || {};
   }
 

src/plugins/share/common/url_service/locators/short_url_assert_valid.test.ts

@@ -0,0 +1,49 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { shortUrlAssertValid } from './short_url_assert_valid';
+
+describe('shortUrlAssertValid()', () => {
+  const invalid = [
+    ['protocol', 'http://localhost:5601/app/kibana'],
+    ['protocol', 'https://localhost:5601/app/kibana'],
+    ['protocol', 'mailto:foo@bar.net'],
+    ['protocol', 'javascript:alert("hi")'], // eslint-disable-line no-script-url
+    ['hostname', 'localhost/app/kibana'], // according to spec, this is not a valid URL -- you cannot specify a hostname without a protocol
+    ['hostname and port', 'local.host:5601/app/kibana'], // parser detects 'local.host' as the protocol
+    ['hostname and auth', 'user:pass@localhost.net/app/kibana'], // parser detects 'user' as the protocol
+    ['path traversal', '/app/../../not-kibana'], // fails because there are >2 path parts
+    ['path traversal', '/../not-kibana'], // fails because first path part is not 'app'
+    ['base path', '/base/app/kibana'], // fails because there are >2 path parts
+    ['path with an extra leading slash', '//foo/app/kibana'], // parser detects 'foo' as the hostname
+    ['path with an extra leading slash', '///app/kibana'], // parser detects '' as the hostname
+    ['path without app', '/foo/kibana'], // fails because first path part is not 'app'
+    ['path without appId', '/app/'], // fails because there is only one path part (leading and trailing slashes are trimmed)
+  ];
+
+  invalid.forEach(([desc, url, error]) => {
+    it(`fails when url has ${desc as string}`, () => {
+      expect(() => shortUrlAssertValid(url as string)).toThrow();
+    });
+  });
+
+  const valid = [
+    '/app/kibana',
+    '/app/kibana/', // leading and trailing slashes are trimmed
+    '/app/monitoring#angular/route',
+    '/app/text#document-id',
+    '/app/some?with=query',
+    '/app/some?with=query#and-a-hash',
+  ];
+
+  valid.forEach((url) => {
+    it(`allows ${url}`, () => {
+      shortUrlAssertValid(url);
+    });
+  });
+});

src/plugins/share/common/url_service/locators/short_url_assert_valid.ts

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+const REGEX = /^\/app\/[^/]+.+$/;
+
+export function shortUrlAssertValid(url: string) {
+  if (!REGEX.test(url) || url.includes('/../')) throw new Error(`Invalid short URL: ${url}`);
+}

src/plugins/share/common/url_service/locators/types.ts

@@ -53,6 +53,8 @@ export interface LocatorDefinition<P extends SerializableRecord>
  * Public interface of a registered locator.
  */
 export interface LocatorPublic<P extends SerializableRecord> extends PersistableState<P> {
+  readonly id: string;
+
   /**
    * Returns a reference to a Kibana client-side location.
    *

src/plugins/share/common/url_service/mocks.ts

@@ -18,6 +18,22 @@ export class MockUrlService extends UrlService {
       getUrl: async ({ app, path }, { absolute }) => {
         return `${absolute ? 'http://localhost:8888' : ''}/app/${app}${path}`;
       },
+      shortUrls: {
+        get: () => ({
+          create: async () => {
+            throw new Error('Not implemented.');
+          },
+          get: async () => {
+            throw new Error('Not implemented.');
+          },
+          delete: async () => {
+            throw new Error('Not implemented.');
+          },
+          resolve: async () => {
+            throw new Error('Not implemented.');
+          },
+        }),
+      },
     });
   }
 }

src/plugins/share/common/url_service/short_urls/index.ts

@@ -0,0 +1,9 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+export * from './types';

src/plugins/share/common/url_service/short_urls/types.ts

@@ -0,0 +1,141 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { SerializableRecord } from '@kbn/utility-types';
+import { VersionedState } from 'src/plugins/kibana_utils/common';
+import { LocatorPublic } from '../locators';
+
+/**
+ * A factory for Short URL Service. We need this factory as the dependency
+ * injection is different between the server and the client. On the server,
+ * the Short URL Service needs a saved object client scoped to the current
+ * request and the current Kibana version. On the client, the Short URL Service
+ * needs no dependencies.
+ */
+export interface IShortUrlClientFactory<D> {
+  get(dependencies: D): IShortUrlClient;
+}
+
+/**
+ * CRUD-like API for short URLs.
+ */
+export interface IShortUrlClient {
+  /**
+   * Create a new short URL.
+   *
+   * @param locator The locator for the URL.
+   * @param param The parameters for the URL.
+   * @returns The created short URL.
+   */
+  create<P extends SerializableRecord>(params: ShortUrlCreateParams<P>): Promise<ShortUrl<P>>;
+
+  /**
+   * Delete a short URL.
+   *
+   * @param slug The ID of the short URL.
+   */
+  delete(id: string): Promise<void>;
+
+  /**
+   * Fetch a short URL.
+   *
+   * @param id The ID of the short URL.
+   */
+  get(id: string): Promise<ShortUrl>;
+
+  /**
+   * Fetch a short URL by its slug.
+   *
+   * @param slug The slug of the short URL.
+   */
+  resolve(slug: string): Promise<ShortUrl>;
+}
+
+/**
+ * New short URL creation parameters.
+ */
+export interface ShortUrlCreateParams<P extends SerializableRecord> {
+  /**
+   * Locator which will be used to resolve the short URL.
+   */
+  locator: LocatorPublic<P>;
+
+  /**
+   * Locator parameters which will be used to resolve the short URL.
+   */
+  params: P;
+
+  /**
+   * Optional, short URL slug - the part that will be used to resolve the short
+   * URL. This part will be visible to the user, it can have user-friendly text.
+   */
+  slug?: string;
+
+  /**
+   * Whether to generate a slug automatically. If `true`, the slug will be
+   * a human-readable text consisting of three worlds: "<adjective>-<adjective>-<noun>".
+   */
+  humanReadableSlug?: boolean;
+}
+
+/**
+ * A representation of a short URL.
+ */
+export interface ShortUrl<LocatorParams extends SerializableRecord = SerializableRecord> {
+  /**
+   * Serializable state of the short URL, which is stored in Kibana.
+   */
+  readonly data: ShortUrlData<LocatorParams>;
+}
+
+/**
+ * A representation of a short URL's data.
+ */
+export interface ShortUrlData<LocatorParams extends SerializableRecord = SerializableRecord> {
+  /**
+   * Unique ID of the short URL.
+   */
+  readonly id: string;
+
+  /**
+   * The slug of the short URL, the part after the `/` in the URL.
+   */
+  readonly slug: string;
+
+  /**
+   * Number of times the short URL has been resolved.
+   */
+  readonly accessCount: number;
+
+  /**
+   * The timestamp of the last time the short URL was resolved.
+   */
+  readonly accessDate: number;
+
+  /**
+   * The timestamp when the short URL was created.
+   */
+  readonly createDate: number;
+
+  /**
+   * The timestamp when the short URL was last modified.
+   */
+  readonly locator: LocatorData<LocatorParams>;
+}
+
+/**
+ * Represents a serializable state of a locator. Includes locator ID, version
+ * and its params.
+ */
+export interface LocatorData<LocatorParams extends SerializableRecord = SerializableRecord>
+  extends VersionedState<LocatorParams> {
+  /**
+   * Locator ID.
+   */
+  id: string;
+}

src/plugins/share/common/url_service/url_service.ts

@@ -7,19 +7,25 @@
  */
 
 import { LocatorClient, LocatorClientDependencies } from './locators';
+import { IShortUrlClientFactory } from './short_urls';
 
-export type UrlServiceDependencies = LocatorClientDependencies;
+export interface UrlServiceDependencies<D = unknown> extends LocatorClientDependencies {
+  shortUrls: IShortUrlClientFactory<D>;
+}
 
 /**
  * Common URL Service client interface for server-side and client-side.
  */
-export class UrlService {
+export class UrlService<D = unknown> {
   /**
    * Client to work with locators.
    */
   public readonly locators: LocatorClient;
 
-  constructor(protected readonly deps: UrlServiceDependencies) {
+  public readonly shortUrls: IShortUrlClientFactory<D>;
+
+  constructor(protected readonly deps: UrlServiceDependencies<D>) {
     this.locators = new LocatorClient(deps);
+    this.shortUrls = deps.shortUrls;
   }
 }