Merge pull request #1 from skoelle/renovate/python-dependencies

Update Python dependencies

.env.example

@@ -21,6 +21,14 @@ POLL_INTERVAL_MINUTES=15
 # Healthchecks (self-hosted)
 HEALTHCHECK_PING_URL=https://healthchecks.example.org/ping/change-me
 
+# E-Mail-Notification bei IP-Änderung (optional)
+SMTP_HOST=smtp.example.org
+SMTP_PORT=587
+SMTP_USER=change-me
+SMTP_PASSWORD=change-me
+NOTIFY_EMAIL_TO=you@example.org
+NOTIFY_EMAIL_FROM=dyndns@example.org
+
 # Sonstiges
 TZ=Europe/Berlin
 LOG_LEVEL=INFO

.github/workflows/build-and-push.yml

@@ -14,25 +14,25 @@ jobs:
       packages: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
       - name: Log in to GHCR
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Extract metadata
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/dyndns-updater
           tags: |
             type=raw,value=latest,enable={{is_default_branch}}
             type=semver,pattern={{version}}
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           context: .
           push: true

.github/workflows/lint.yml

@@ -9,8 +9,8 @@ jobs:
   ruff:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v7
         with:
           python-version: "3.12"
       - run: pip install ruff

PLAN.md

@@ -13,6 +13,7 @@
 
 ## Phase 2 - Kernmodule
 - [x] config.py, state.py, fritzbox.py, cloudflare.py, freedns.py, healthcheck.py, main.py
+- [x] notify.py (E-Mail-Notification bei IP-Aenderung)
 
 ## Phase 3 - Lokaler Test
 - [ ] .env lokal befuellen (nicht committen)

README.md

@@ -39,6 +39,20 @@ Optional: `FREEDNS_UPDATE_URL`, `POLL_INTERVAL_MINUTES`,
 `HEALTHCHECK_PING_URL`, `TZ`, `LOG_LEVEL`. Die IP kommt ausschließlich aus der
 FritzBox, nie aus Webhook-Parametern.
 
+### E-Mail-Notification (optional)
+
+Bei IP-Änderung wird eine HTML-E-Mail mit Emojis versendet, wenn SMTP-Konfiguration
+vorliegt:
+
+| Variable | Zweck |
+| --- | --- |
+| `SMTP_HOST` | SMTP-Server (z.B. `smtp.gmail.com`) |
+| `SMTP_PORT` | Port (Default: `587`) |
+| `SMTP_USER` | SMTP-Login |
+| `SMTP_PASSWORD` | SMTP-Passwort |
+| `NOTIFY_EMAIL_TO` | Empfänger-Adresse |
+| `NOTIFY_EMAIL_FROM` | Absender-Adresse |
+
 ## Betrieb
 
 - **State (bewusst ohne Volume, ephemeral):** zuletzt bekannte IP liegt als

SPEC.md

@@ -26,7 +26,8 @@ die IP bei jedem Trigger selbst ueber die FritzBox TR-064-Schnittstelle.
 2. IP_letzte = state.load()
 3. Wenn gleich: Poll -> nur Heartbeat-Ping, kein Update. Webhook/Start -> nur Log.
 4. Wenn unterschiedlich: Cloudflare-Records updaten, FreeDNS aufrufen, state speichern,
-   Healthcheck-Erfolgs-Ping. Bei Teilfehler: state NICHT speichern, Fail-Ping.
+   Healthcheck-Erfolgs-Ping, E-Mail-Notification (optional). Bei Teilfehler: state NICHT
+   speichern, Fail-Ping.
 
 ## 3. Cloudflare
 
@@ -46,7 +47,14 @@ die IP bei jedem Trigger selbst ueber die FritzBox TR-064-Schnittstelle.
 - FritzBox-TR-064-User mit eingeschraenkten Rechten
 - Alle Records bleiben DNS-only (kein Proxy-Mode in v1)
 
-## 6. Offene Punkte
+## 6. E-Mail-Notification (optional)
+
+- HTML-E-Mail mit Emojis bei erfolgreicher IP-Aenderung
+- SMTP-Auth mit TLS (Port 587)
+- Nur wenn SMTP_HOST, NOTIFY_EMAIL_TO und NOTIFY_EMAIL_FROM gesetzt
+- Plain-Text-Fallback fuer Clients ohne HTML-Unterstuetzung
+
+## 7. Offene Punkte
 
 - IPv6/AAAA
 - Proxy-Mode fuer reine HTTP(S)-Subdomains

app/config.py

@@ -39,8 +39,19 @@ class Config:
 
         self.healthcheck_ping_url = os.environ.get("HEALTHCHECK_PING_URL", "")
 
+        self.smtp_host = os.environ.get("SMTP_HOST", "")
+        self.smtp_port = int(os.environ.get("SMTP_PORT", "587"))
+        self.smtp_user = os.environ.get("SMTP_USER", "")
+        self.smtp_password = os.environ.get("SMTP_PASSWORD", "")
+        self.notify_email_to = os.environ.get("NOTIFY_EMAIL_TO", "")
+        self.notify_email_from = os.environ.get("NOTIFY_EMAIL_FROM", "")
+
         self.state_path = os.environ.get("STATE_PATH", "/app/data/last-known-ip.json")
 
+    @property
+    def email_notification_enabled(self) -> bool:
+        return bool(self.smtp_host and self.notify_email_to and self.notify_email_from)
+
     def validate(self):
         missing = [v for v in REQUIRED_VARS if not os.environ.get(v)]
         if missing:

app/main.py

@@ -7,7 +7,7 @@ import threading
 from apscheduler.schedulers.background import BackgroundScheduler
 from flask import Flask
 
-from app import cloudflare, freedns, healthcheck, state
+from app import cloudflare, freedns, healthcheck, notify, state
 from app.config import config
 from app.fritzbox import FritzBoxError, get_external_ip
 
@@ -67,6 +67,7 @@ def run_cycle(trigger: str = "unknown"):
                 status="success",
                 message=f"IP updated to {current_ip}",
             )
+            notify.send_ip_changed_email(last_ip, current_ip)
         else:
             failed = {k: v for k, v in cf_results.items() if v != "ok"}
             log.error(

app/notify.py

@@ -0,0 +1,77 @@
+# Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
+# Licensed under the MIT License. See LICENSE file in project root for details.
+import logging
+import smtplib
+from email.message import EmailMessage
+
+from app.config import config
+
+log = logging.getLogger("notify")
+
+
+def send_ip_changed_email(old_ip: str | None, new_ip: str) -> bool:
+    if not config.email_notification_enabled:
+        log.debug("E-Mail-Notification nicht konfiguriert, überspringe.")
+        return False
+
+    if old_ip is None:
+        old_ip = "unbekannt"
+
+    subject = f"🌐 IP-Update: {old_ip} → {new_ip}"
+
+    html = f"""\
+<html>
+<body style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+             background: #0f172a; color: #e2e8f0; padding: 32px; margin: 0;">
+  <div style="max-width: 480px; margin: 0 auto;">
+    <div style="text-align: center; font-size: 48px; margin-bottom: 16px;">🔄</div>
+    <h1 style="font-size: 20px; color: #38bdf8; text-align: center; margin-bottom: 24px;">
+      IP-Adresse geändert
+    </h1>
+    <div style="background: #1e293b; border-radius: 12px; padding: 24px; margin-bottom: 24px;">
+      <table style="width: 100%; border-collapse: collapse;">
+        <tr>
+          <td style="padding: 8px 0; color: #94a3b8; font-size: 14px;">📍 Alte IP</td>
+          <td style="padding: 8px 0; text-align: right; font-family: monospace; font-size: 16px; color: #f87171;">
+            {old_ip}
+          </td>
+        </tr>
+        <tr>
+          <td colspan="2" style="padding: 4px 0; text-align: center; font-size: 20px;">⬇️</td>
+        </tr>
+        <tr>
+          <td style="padding: 8px 0; color: #94a3b8; font-size: 14px;">🆕 Neue IP</td>
+          <td style="padding: 8px 0; text-align: right; font-family: monospace; font-size: 16px; color: #4ade80;">
+            {new_ip}
+          </td>
+        </tr>
+      </table>
+    </div>
+    <p style="font-size: 13px; color: #64748b; text-align: center; margin: 0;">
+      📡 DynDNS-Updater · Cloudflare + FreeDNS aktualisiert
+    </p>
+  </div>
+</body>
+</html>"""
+
+    text = f"IP-Adresse geändert: {old_ip} → {new_ip}"
+
+    msg = EmailMessage()
+    msg["Subject"] = subject
+    msg["From"] = config.notify_email_from
+    msg["To"] = config.notify_email_to
+    msg.set_content(text)
+    msg.add_alternative(html, subtype="html")
+
+    try:
+        with smtplib.SMTP(config.smtp_host, config.smtp_port) as server:
+            server.ehlo()
+            server.starttls()
+            server.ehlo()
+            server.login(config.smtp_user, config.smtp_password)
+            server.send_message(msg)
+        log.info("E-Mail gesendet: %s -> %s", subject, config.notify_email_to)
+        return True
+    except Exception as exc:
+        log.error("E-Mail-Versand fehlgeschlagen: %s", exc)
+        return False

renovate.json

@@ -0,0 +1,36 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:recommended"],
+  "schedule": ["before 6am on Monday"],
+  "packageRules": [
+    {
+      "matchManagers": ["github-actions"],
+      "groupName": "GitHub Actions",
+      "automerge": true
+    },
+    {
+      "matchManagers": ["dockerfile"],
+      "groupName": "Docker",
+      "automerge": false
+    },
+    {
+      "matchManagers": ["docker-compose"],
+      "groupName": "Docker Compose",
+      "automerge": false
+    },
+    {
+      "matchManagers": ["pip_requirements", "pyproject", "pip_setup"],
+      "groupName": "Python dependencies",
+      "automerge": true
+    },
+    {
+      "matchUpdateTypes": ["minor", "patch"],
+      "automerge": true
+    },
+    {
+      "matchUpdateTypes": ["major"],
+      "labels": ["major-update"],
+      "automerge": false
+    }
+  ]
+}

requirements.txt

@@ -1,4 +1,4 @@
-flask==3.0.3
+flask==3.1.3
-requests==2.32.3
+requests==2.34.2
-fritzconnection==1.14.0
+fritzconnection==1.15.1
-APScheduler==3.10.4
+APScheduler==3.11.3