refactor(core): Expand error message for unknown webhook request (#15178)

packages/@n8n/db/src/entities/webhook-entity.ts

@@ -50,4 +50,8 @@ export class WebhookEntity {
 	get isDynamic() {
 		return this.webhookPath.split('/').some((s) => s.startsWith(':'));
 	}
+
+	display() {
+		return `${this.method} ${this.webhookPath}`;
+	}
 }

packages/cli/src/webhooks/webhook-request-handler.ts

@@ -3,6 +3,7 @@ import type express from 'express';
 import { Logger } from 'n8n-core';
 import { ensureError, type IHttpRequestMethods } from 'n8n-workflow';
 
+import { WebhookNotFoundError } from '@/errors/response-errors/webhook-not-found.error';
 import * as ResponseHelper from '@/response-helper';
 import type {
 	IWebhookManager,
@@ -10,6 +11,8 @@ import type {
 	WebhookRequest,
 } from '@/webhooks/webhook.types';
 
+import { WebhookService } from './webhook.service';
+
 const WEBHOOK_METHODS: IHttpRequestMethods[] = ['DELETE', 'GET', 'HEAD', 'PATCH', 'POST', 'PUT'];
 
 class WebhookRequestHandler {
@@ -56,10 +59,20 @@ class WebhookRequestHandler {
 			}
 		} catch (e) {
 			const error = ensureError(e);
-			Container.get(Logger).debug(
+
+			const logger = Container.get(Logger);
+
+			if (e instanceof WebhookNotFoundError) {
+				const currentlyRegistered = await Container.get(WebhookService).findAll();
+				logger.error(`Received request for unknown webhook: ${e.message}`, {
+					currentlyRegistered: currentlyRegistered.map((w) => w.display()),
+				});
+			} else {
+				logger.error(
 					`Error in handling webhook request ${req.method} ${req.path}: ${error.message}`,
 					{ stacktrace: error.stack },
 				);
+			}
 
 			return ResponseHelper.sendErrorResponse(res, error);
 		}

packages/cli/src/webhooks/webhook.service.ts

@@ -38,6 +38,10 @@ export class WebhookService {
 		void this.cacheService.setMany(allWebhooks.map((w) => [w.cacheKey, w]));
 	}
 
+	async findAll() {
+		return await this.webhookRepository.find();
+	}
+
 	private async findCached(method: Method, path: string) {
 		const cacheKey = `webhook:${method}-${path}`;