added redirect service

README.md

@@ -17,7 +17,7 @@ We build a robot with raspberry and arduino.
 
     python3 -m venv /opt/face/venv
     /opt/face/venv/bin/pip install --upgrade pip
-    /opt/face/venv/bin/pip install fastapi uvicorn
+    /opt/face/venv/bin/pip install fastapi uvicorn netifaces
 
 ### Exchange Nginx Web-Folder
     sudo rm -r /var/www/html
@@ -73,18 +73,21 @@ http://pi-ip/
     curl -X POST http://<pi>/api/state -H "Content-Type: application/json" \
       -d '{"emotion":"happy","blink":true,"intensity":0.85}'
 
-### systemd Service
+### systemd Services
     sudo ln -s /opt/helva-robot/face/etc/systemd/system/face.service /etc/systemd/system/
+    sudo ln -s /opt/helva-robot/face/etc/systemd/system/redirect_to_tethering.service /etc/systemd/system/
 
-    sudo chown -R www-data:www-data /opt/face
-    sudo chmod -R 755 /opt/face
+    sudo chown -R www-data:www-data /opt/face/*.py
+    sudo chmod -R 755 /opt/face/*.py
 
-Start:
+### Start:
 
     sudo systemctl daemon-reload
     sudo systemctl enable --now face.service
     sudo systemctl status face.service --no-pager
 
+    
+
 ### Face Control UI
     http://localhost/control/
 

face/etc/nginx/sites-available/face

@@ -2,6 +2,14 @@ server {
     listen 80;
     server_name _;
 
+    # redirect service to tethering IP for 'webview kiosk' -> mobile phone to face
+    location /redirect {
+        proxy_pass http://127.0.0.1:8000/redirect;
+	proxy_set_header Host $host;
+	proxy_set_header X-Real-IP $remote_addr;
+	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    }
+
     # captive portal to face
     include /opt/helva-robot/drive/etc/nginx/snippets/captive-portal.conf;
 

face/etc/systemd/system/redirect.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Redirect Tethering IP Service
+After=network.target
+
+[Service]
+WorkingDirectory=/opt/face
+ExecStart=/opt/face/venv/bin/python -m uvicorn redirect_tethering_ip:app --host 127.0.0.1 --port 8000 --app-dir /opt/face
+Restart=always
+RestartSec=1
+
+# Tipp: eigener User ist sauber, aber www-data geht auch.
+User=www-data
+Group=www-data
+
+[Install]
+WantedBy=multi-user.target
+

face/opt/face/face_server.py

@@ -66,6 +66,10 @@ async def broadcast() -> None:
 async def get_state():
     return JSONResponse(STATE)
 
+@app.get("/api/state")
+async def get_state():
+    return JSONResponse(STATE)
+
 
 @app.post("/state")
 async def set_state(payload: Dict[str, Any]):
@@ -73,6 +77,12 @@ async def set_state(payload: Dict[str, Any]):
     await broadcast()
     return JSONResponse({"ok": True, "state": STATE})
 
+@app.post("/api/state")
+async def set_state(payload: Dict[str, Any]):
+    merge_state(payload)
+    await broadcast()
+    return JSONResponse({"ok": True, "state": STATE})
+
 
 @app.get("/events")
 async def events(request: Request):

face/opt/face/redirect_tethering_ip.py

@@ -0,0 +1,14 @@
+from fastapi import FastAPI
+from fastapi.responses import RedirectResponse
+import netifaces
+
+app = FastAPI()
+
+@app.get("/redirect")
+def redirect_to_pi():
+  # gather tethering IP
+  interface = 'usb0'
+  ip_address = netifaces.ifaddresses(interface)[netifaces.AF_INET][0]['addr']
+
+  # relocate to current tethering-IP
+  return RedirectResponse(url=f'http://{ip_address}:80')