Add multi-user support via token-based routing and users.json config

Each user gets a unique secret token embedded in their webhook URL
(/webhook/:token). Credentials are loaded from users.json at startup
instead of environment variables, making it easy to add or remove users
without redeploying.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

.gitignore

@@ -1,2 +1,3 @@
 node_modules/
 .env
+users.json

README.md

@@ -1,27 +1,65 @@
 # AudioPen Nextcloud Webhook
 
-A small Node.js webhook service that receives notes from AudioPen and uploads them to a folder in Nextcloud using WebDAV.
+A small Node.js webhook service that receives notes from AudioPen and uploads them to a folder in Nextcloud using WebDAV. Supports multiple users, each with their own Nextcloud credentials and a unique webhook token.
 
 When AudioPen sends a webhook request, the service:
 
-1. Receives the note content
-2. Creates a timestamped Markdown file
-3. Uploads the file to the configured Nextcloud folder
+1. Validates the token in the URL
+2. Receives the note content
+3. Creates a timestamped Markdown file
+4. Uploads the file to the configured Nextcloud folder
 
 Example filename:
 
 ```text
-note-2026-05-19T22-15-10.123Z.md
+2026-05-19T22-15-10.123Z-my-note-title.md
 ```
 
-## Example `.env`
+## Setup
 
-Create a file named `.env` in the project root directory:
+### 1. Configure users
+
+Copy `users.json.example` to `users.json` and fill in credentials for each user:
+
+```json
+{
+  "abc123secrettoken": {
+    "nextcloudUrl": "https://nextcloud.example.com",
+    "username": "alice",
+    "password": "alice-app-password",
+    "folder": "AudioPen"
+  }
+}
+```
+
+Each key is a secret token that identifies a user. Generate one with:
+
+```bash
+node -e "console.log(crypto.randomUUID())"
+```
+
+### 2. Configure the server
+
+Optionally create a `.env` file to set the port or a custom path to `users.json`:
 
 ```env
-NEXTCLOUD_URL=https://nextcloud.example.com
-NEXTCLOUD_USERNAME=myuser
-NEXTCLOUD_PASSWORD=my-app-password
-NEXTCLOUD_FOLDER=AudioPen
 PORT=3000
+USERS_FILE=users.json
 ```
+
+### 3. Run
+
+```bash
+npm install
+node server.js
+```
+
+### 4. Configure AudioPen
+
+In AudioPen's webhook settings, set the URL to:
+
+```
+https://your-server/webhook/<token>
+```
+
+Each user gets their own URL containing their unique token.

server.js

@@ -1,6 +1,7 @@
 import 'dotenv/config'
 import express from 'express'
 import axios from 'axios'
+import { readFileSync } from 'fs'
 
 const app = express()
 
@@ -10,14 +11,24 @@ app.use(express.text({ type: '*/*' }))
 
 const PORT = process.env.PORT || 3000
 
-const NEXTCLOUD_URL = process.env.NEXTCLOUD_URL
-const NEXTCLOUD_USERNAME = process.env.NEXTCLOUD_USERNAME
-const NEXTCLOUD_PASSWORD = process.env.NEXTCLOUD_PASSWORD
-const NEXTCLOUD_FOLDER = process.env.NEXTCLOUD_FOLDER || 'AudioPen'
+const USERS_FILE = process.env.USERS_FILE || 'users.json'
+let users = {}
+try {
+  users = JSON.parse(readFileSync(USERS_FILE, 'utf8'))
+  console.log(`Loaded ${Object.keys(users).length} user(s) from ${USERS_FILE}`)
+} catch (err) {
+  console.error(`Failed to load ${USERS_FILE}: ${err.message}`)
+  process.exit(1)
+}
+
+app.post('/webhook/:token', async (req, res) => {
+  const user = users[req.params.token]
+  if (!user) {
+    return res.status(401).json({ error: 'Invalid token' })
+  }
 
-app.post('/webhook', async (req, res) => {
   try {
-    console.log('Received webhook')
+    console.log(`Received webhook for user: ${user.username}`)
 
     console.log('HEADERS:', req.headers)
     console.log('RAW BODY:', req.body)
@@ -63,16 +74,16 @@ ${transcript}
 `
 
     const webdavUrl =
-      `${process.env.NEXTCLOUD_URL}` +
+      `${user.nextcloudUrl}` +
       `/remote.php/dav/files/` +
-      `${process.env.NEXTCLOUD_USERNAME}/` +
-      `${process.env.NEXTCLOUD_FOLDER}/` +
+      `${user.username}/` +
+      `${user.folder}/` +
       `${filename}`
 
     await axios.put(webdavUrl, markdown, {
       auth: {
-        username: process.env.NEXTCLOUD_USERNAME,
-        password: process.env.NEXTCLOUD_PASSWORD
+        username: user.username,
+        password: user.password
       },
       headers: {
         'Content-Type': 'text/markdown'

users.json.example

@@ -0,0 +1,14 @@
+{
+  "abc123secrettoken": {
+    "nextcloudUrl": "https://nextcloud.example.com",
+    "username": "alice",
+    "password": "alice-app-password",
+    "folder": "AudioPen"
+  },
+  "xyz789anothertoken": {
+    "nextcloudUrl": "https://nextcloud.example.com",
+    "username": "bob",
+    "password": "bob-app-password",
+    "folder": "AudioPen"
+  }
+}