feat: Use URLs for channel identifiers

In the future these can potentially be used to dereference them

config/http/notifications/webhooks/routes.json

@@ -7,12 +7,6 @@
       "base": { "@id": "urn:solid-server:default:NotificationRoute" },
       "relativePath": "/WebHookSubscription2021/"
     },
-    {
-      "@id": "urn:solid-server:default:WebHookUnsubscribeRoute",
-      "@type": "RelativePathInteractionRoute",
-      "base": { "@id": "urn:solid-server:default:WebHookRoute" },
-      "relativePath": "/unsubscribe/"
-    },
     {
       "@id": "urn:solid-server:default:WebHookWebIdRoute",
       "@type": "RelativePathInteractionRoute",
@@ -27,7 +21,7 @@
       "@type": "OperationRouterHandler",
       "baseUrl": { "@id": "urn:solid-server:default:variable:baseUrl" },
       "allowedMethods": [ "DELETE" ],
-      "allowedPathNames": [ "/WebHookSubscription2021/unsubscribe/" ],
+      "allowedPathNames": [ "/WebHookSubscription2021/" ],
       "handler": {
         "@type": "WebHookUnsubscriber",
         "credentialsExtractor": { "@id": "urn:solid-server:default:CredentialsExtractor" },
@@ -39,7 +33,7 @@
       "@id": "urn:solid-server:default:WebHookWebId",
       "@type": "OperationRouterHandler",
       "baseUrl": { "@id": "urn:solid-server:default:variable:baseUrl" },
-      "allowedPathNames": [ "/WebHookSubscription2021/webId" ],
+      "allowedPathNames": [ "/WebHookSubscription2021/webId$" ],
       "handler": {
         "@type": "WebHookWebId",
         "baseUrl": { "@id": "urn:solid-server:default:variable:baseUrl" }

config/http/notifications/webhooks/subscription.json

@@ -24,7 +24,6 @@
       "@type": "WebHookSubscription2021",
       "route": { "@id": "urn:solid-server:default:WebHookRoute" },
       "webIdRoute": { "@id": "urn:solid-server:default:WebHookWebIdRoute" },
-      "unsubscribeRoute": { "@id": "urn:solid-server:default:WebHookUnsubscribeRoute" },
       "stateHandler": {
         "@type": "BaseStateHandler",
         "handler": { "@id": "urn:solid-server:default:WebHookNotificationHandler" },

src/server/notifications/BaseChannelType.ts

@@ -14,6 +14,7 @@ import type { InteractionRoute } from '../../identity/interaction/routing/Intera
 import { ContextDocumentLoader } from '../../storage/conversion/ConversionUtil';
 import { UnprocessableEntityHttpError } from '../../util/errors/UnprocessableEntityHttpError';
 import { IdentifierSetMultiMap } from '../../util/map/IdentifierMap';
+import { joinUrl } from '../../util/PathUtil';
 import { readableToQuads } from '../../util/StreamUtil';
 import { msToDuration } from '../../util/StringUtil';
 import { NOTIFY, RDF, XSD } from '../../util/Vocabularies';
@@ -201,7 +202,9 @@ export abstract class BaseChannelType implements NotificationChannelType {
 
   /**
    * Converts a set of quads to a {@link NotificationChannel}.
-   * Assumes the data is valid, so this should be called after {@link validateSubscription}
+   * Assumes the data is valid, so this should be called after {@link validateSubscription}.
+   *
+   * The generated identifier will be a URL made by combining the base URL of the channel type with a unique identifier.
    *
    * The values of the default features will be added to the resulting channel,
    * subclasses with additional features that need to be added are responsible for parsing those quads.
@@ -216,7 +219,7 @@ export abstract class BaseChannelType implements NotificationChannelType {
     const type = data.getObjects(subject, RDF.terms.type, null)[0] as NamedNode;
 
     const channel: NotificationChannel = {
-      id: `${v4()}:${topic.value}`,
+      id: joinUrl(this.path, v4()),
       type: type.value,
       topic: topic.value,
     };

src/server/notifications/WebHookSubscription2021/WebHookSubscription2021.ts

@@ -9,7 +9,6 @@ import { BaseChannelType, DEFAULT_NOTIFICATION_FEATURES } from '../BaseChannelTy
 import type { NotificationChannel } from '../NotificationChannel';
 import type { SubscriptionService } from '../NotificationChannelType';
 import type { StateHandler } from '../StateHandler';
-import { generateWebHookUnsubscribeUrl } from './WebHook2021Util';
 
 /**
  * A {@link NotificationChannel} containing the necessary fields for a WebHookSubscription2021 channel.
@@ -57,19 +56,17 @@ export function isWebHook2021Channel(channel: NotificationChannel): channel is W
 export class WebHookSubscription2021 extends BaseChannelType {
   protected readonly logger = getLoggerFor(this);
 
-  private readonly unsubscribePath: string;
   private readonly stateHandler: StateHandler;
   private readonly webId: string;
 
   /**
    * @param route - The route corresponding to the URL of the subscription service of this channel type.
    * @param webIdRoute - The route to the WebID that needs to be used when generating DPoP tokens for notifications.
-   * @param unsubscribeRoute - The route where the request needs to be sent to unsubscribe.
    * @param stateHandler - The {@link StateHandler} that will be called after a successful subscription.
    * @param features - The features that need to be enabled for this channel type.
    */
-  public constructor(route: InteractionRoute, webIdRoute: InteractionRoute, unsubscribeRoute: InteractionRoute,
-    stateHandler: StateHandler, features: string[] = DEFAULT_NOTIFICATION_FEATURES) {
+  public constructor(route: InteractionRoute, webIdRoute: InteractionRoute, stateHandler: StateHandler,
+    features: string[] = DEFAULT_NOTIFICATION_FEATURES) {
     super(NOTIFY.terms.WebHookSubscription2021,
       route,
       [ ...features, NOTIFY.webhookAuth ],
@@ -80,7 +77,6 @@ export class WebHookSubscription2021 extends BaseChannelType {
       // which would make this more annoying so we are lenient here.
       // Could change in the future once this field is updated and part of the context.
       [{ path: NOTIFY.target, minCount: 1, maxCount: 1 }]);
-    this.unsubscribePath = unsubscribeRoute.getPath();
     this.stateHandler = stateHandler;
     this.webId = webIdRoute.getPath();
   }
@@ -114,7 +110,7 @@ export class WebHookSubscription2021 extends BaseChannelType {
       webId,
       target: target.value,
       // eslint-disable-next-line @typescript-eslint/naming-convention
-      unsubscribe_endpoint: generateWebHookUnsubscribeUrl(this.unsubscribePath, channel.id),
+      unsubscribe_endpoint: channel.id,
     };
   }
 

src/server/notifications/WebHookSubscription2021/WebHookUnsubscriber.ts

@@ -7,7 +7,6 @@ import { NotFoundHttpError } from '../../../util/errors/NotFoundHttpError';
 import type { OperationHttpHandlerInput } from '../../OperationHttpHandler';
 import { OperationHttpHandler } from '../../OperationHttpHandler';
 import type { NotificationChannelStorage } from '../NotificationChannelStorage';
-import { parseWebHookUnsubscribeUrl } from './WebHook2021Util';
 import { isWebHook2021Channel } from './WebHookSubscription2021';
 
 /**
@@ -27,7 +26,7 @@ export class WebHookUnsubscriber extends OperationHttpHandler {
   }
 
   public async handle({ operation, request }: OperationHttpHandlerInput): Promise<ResponseDescription> {
-    const id = parseWebHookUnsubscribeUrl(operation.target.path);
+    const id = operation.target.path;
     const channel = await this.storage.get(id);
     if (!channel || !isWebHook2021Channel(channel)) {
       throw new NotFoundHttpError();

test/integration/WebHookSubscription2021.test.ts

@@ -5,6 +5,9 @@ import { createRemoteJWKSet, jwtVerify } from 'jose';
 import type { NamedNode } from 'n3';
 import { DataFactory, Parser, Store } from 'n3';
 import type { App } from '../../src/init/App';
+import type {
+  WebHookSubscription2021Channel,
+} from '../../src/server/notifications/WebHookSubscription2021/WebHookSubscription2021';
 import { matchesAuthorizationScheme } from '../../src/util/HeaderUtil';
 import { joinUrl, trimTrailingSlashes } from '../../src/util/PathUtil';
 import { readJsonStream } from '../../src/util/StreamUtil';
@@ -181,4 +184,15 @@ describe.each(stores)('A server supporting WebHookSubscription2021 using %s', (n
     // Close the connection so the server can shut down
     response.end();
   });
+
+  it('allows a user to unsubscribe.', async(): Promise<void> => {
+    const json = await subscribe(notificationType, webId, subscriptionUrl, topic, { [NOTIFY.target]: target });
+    const unsubscribeUrl = (json as WebHookSubscription2021Channel).unsubscribe_endpoint;
+    let response = await fetch(unsubscribeUrl, { method: 'DELETE' });
+    expect(response.status).toBe(403);
+    response = await fetch(unsubscribeUrl, { method: 'DELETE', headers: { authorization: `WebID ${webId}` }});
+    expect(response.status).toBe(205);
+    response = await fetch(joinUrl(subscriptionUrl, 'abc'), { method: 'DELETE' });
+    expect(response.status).toBe(404);
+  });
 });

test/integration/WebSocketSubscription2021.test.ts

@@ -6,7 +6,7 @@ import { BasicRepresentation } from '../../src/http/representation/BasicRepresen
 import type { App } from '../../src/init/App';
 import type { ResourceStore } from '../../src/storage/ResourceStore';
 import { joinUrl } from '../../src/util/PathUtil';
-import { NOTIFY } from '../../src/util/Vocabularies';
+import { NOTIFY, RDF } from '../../src/util/Vocabularies';
 import { expectNotification, subscribe } from '../util/NotificationUtil';
 import { getPort } from '../util/Util';
 import {
@@ -223,4 +223,29 @@ describe.each(stores)('A server supporting WebSocketSubscription2021 using %s',
     const message = (await messagePromise).toString();
     expect(message).toBe('Notification channel has expired');
   });
+
+  it('can use other RDF formats and content negotiation when creating a channel.', async(): Promise<void> => {
+    const turtleChannel = `
+      _:id <${RDF.type}> <${notificationType}> ;
+           <http://www.w3.org/ns/solid/notifications#topic> <${topic}>.
+    `;
+
+    const response = await fetch(subscriptionUrl, {
+      method: 'POST',
+      headers: {
+        authorization: `WebID ${webId}`,
+        'content-type': 'text/turtle',
+        accept: 'text/turtle',
+      },
+      body: turtleChannel,
+    });
+    expect(response.status).toBe(200);
+    expect(response.headers.get('content-type')).toBe('text/turtle');
+
+    const parser = new Parser({ baseIRI: subscriptionUrl });
+    const quads = new Store(parser.parse(await response.text()));
+
+    expect(quads.getObjects(null, RDF.terms.type, null)).toEqual([ NOTIFY.terms.WebSocketSubscription2021 ]);
+    expect(quads.getObjects(null, NOTIFY.terms.topic, null)).toEqual([ namedNode(topic) ]);
+  });
 });

test/unit/server/notifications/BaseChannelType.test.ts

@@ -29,7 +29,7 @@ class DummyChannelType extends BaseChannelType {
 }
 
 describe('A BaseChannelType', (): void => {
-  const id = '4c9b88c1-7502-4107-bb79-2a3a590c7aa3:https://storage.example/resource';
+  const id = 'http://example.com/DummyType/4c9b88c1-7502-4107-bb79-2a3a590c7aa3';
   const credentials: Credentials = {};
   const channelType = new DummyChannelType();
 

test/unit/server/notifications/WebHookSubscription2021/WebHookSubscription2021.test.ts

@@ -18,7 +18,6 @@ import {
   isWebHook2021Channel,
   WebHookSubscription2021,
 } from '../../../../../src/server/notifications/WebHookSubscription2021/WebHookSubscription2021';
-import { joinUrl } from '../../../../../src/util/PathUtil';
 import { NOTIFY, RDF } from '../../../../../src/util/Vocabularies';
 import quad = DataFactory.quad;
 import blankNode = DataFactory.blankNode;
@@ -41,7 +40,6 @@ describe('A WebHookSubscription2021', (): void => {
   let channel: WebHookSubscription2021Channel;
   const route = new AbsolutePathInteractionRoute('http://example.com/webhooks/');
   const webIdRoute = new RelativePathInteractionRoute(route, '/webid');
-  const unsubscribeRoute = new RelativePathInteractionRoute(route, '/unsubscribe');
   let stateHandler: jest.Mocked<StateHandler>;
   let channelType: WebHookSubscription2021;
 
@@ -51,22 +49,22 @@ describe('A WebHookSubscription2021', (): void => {
     data.addQuad(quad(subject, NOTIFY.terms.topic, namedNode(topic)));
     data.addQuad(quad(subject, NOTIFY.terms.target, namedNode(target)));
 
-    const id = '4c9b88c1-7502-4107-bb79-2a3a590c7aa3:https://storage.example/resource';
+    const id = 'http://example.com/webhooks/4c9b88c1-7502-4107-bb79-2a3a590c7aa3';
     channel = {
       id,
       type: NOTIFY.WebHookSubscription2021,
       topic: 'https://storage.example/resource',
       target,
       webId: 'http://example.org/alice',
       // eslint-disable-next-line @typescript-eslint/naming-convention
-      unsubscribe_endpoint: joinUrl(unsubscribeRoute.getPath(), encodeURIComponent(id)),
+      unsubscribe_endpoint: id,
     };
 
     stateHandler = {
       handleSafe: jest.fn(),
     } as any;
 
-    channelType = new WebHookSubscription2021(route, webIdRoute, unsubscribeRoute, stateHandler);
+    channelType = new WebHookSubscription2021(route, webIdRoute, stateHandler);
   });
 
   it('exposes a utility function to verify if a channel is a webhook channel.', async(): Promise<void> => {

test/unit/server/notifications/WebHookSubscription2021/WebHookUnsubscriber.test.ts

@@ -25,7 +25,7 @@ describe('A WebHookUnsubscriber', (): void => {
   beforeEach(async(): Promise<void> => {
     operation = {
       method: 'DELETE',
-      target: { path: 'http://example.com/.notifications/webhooks/unsubscribe/134' },
+      target: { path: 'http://example.com/.notifications/webhooks/134' },
       preferences: {},
       body: new BasicRepresentation(),
     };
@@ -58,6 +58,6 @@ describe('A WebHookUnsubscriber', (): void => {
     await expect(unsubscriber.handle({ operation, request, response }))
       .resolves.toEqual(new ResetResponseDescription());
     expect(storage.delete).toHaveBeenCalledTimes(1);
-    expect(storage.delete).toHaveBeenLastCalledWith('134');
+    expect(storage.delete).toHaveBeenLastCalledWith('http://example.com/.notifications/webhooks/134');
   });
 });

test/unit/server/notifications/WebSocketSubscription2021/WebSocketSubscription2021.test.ts

@@ -34,7 +34,7 @@ describe('A WebSocketSubscription2021', (): void => {
     data.addQuad(quad(subject, RDF.terms.type, NOTIFY.terms.WebSocketSubscription2021));
     data.addQuad(quad(subject, NOTIFY.terms.topic, namedNode(topic)));
 
-    const id = '4c9b88c1-7502-4107-bb79-2a3a590c7aa3:https://storage.example/resource';
+    const id = 'http://example.com/foo/4c9b88c1-7502-4107-bb79-2a3a590c7aa3';
     channel = {
       id,
       type: NOTIFY.WebSocketSubscription2021,