Implement browser push notifications

backend/generate_vapid_keys.py

@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+"""
+Generate VAPID keys for push notifications
+Run this script to generate new VAPID keys for your application
+"""
+
+from pywebpush import WebPushException
+import base64
+import json
+
+def generate_vapid_keys():
+    """Generate VAPID keys for push notifications"""
+    try:
+        from cryptography.hazmat.primitives import serialization
+        from cryptography.hazmat.primitives.asymmetric import ec
+        from cryptography.hazmat.backends import default_backend
+        
+        # Generate private key
+        private_key = ec.generate_private_key(ec.SECP256R1(), default_backend())
+        
+        # Get public key
+        public_key = private_key.public_key()
+        
+        # Serialize keys
+        private_pem = private_key.private_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PrivateFormat.PKCS8,
+            encryption_algorithm=serialization.NoEncryption()
+        )
+        
+        public_pem = public_key.public_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PublicFormat.SubjectPublicKeyInfo
+        )
+        
+        # Convert to base64 for web push
+        private_key_b64 = base64.urlsafe_b64encode(
+            private_key.private_bytes(
+                encoding=serialization.Encoding.DER,
+                format=serialization.PrivateFormat.PKCS8,
+                encryption_algorithm=serialization.NoEncryption()
+            )
+        ).decode('utf-8').rstrip('=')
+        
+        # Get the raw uncompressed public key point (65 bytes: 0x04 + 32 bytes x + 32 bytes y)
+        public_numbers = public_key.public_numbers()
+        x_bytes = public_numbers.x.to_bytes(32, 'big')
+        y_bytes = public_numbers.y.to_bytes(32, 'big')
+        public_key_raw = b'\x04' + x_bytes + y_bytes
+        
+        public_key_b64 = base64.urlsafe_b64encode(public_key_raw).decode('utf-8').rstrip('=')
+        
+        print("VAPID Keys Generated:")
+        print("=" * 50)
+        print(f"Private Key: {private_key_b64}")
+        print(f"Public Key:  {public_key_b64}")
+        print("=" * 50)
+        print("\nAdd these to your environment variables:")
+        print(f"VAPID_PRIVATE_KEY={private_key_b64}")
+        print(f"VAPID_PUBLIC_KEY={public_key_b64}")
+        
+        return private_key_b64, public_key_b64
+        
+    except ImportError:
+        print("Error: cryptography library not found.")
+        print("Install it with: pip install cryptography")
+        return None, None
+    except Exception as e:
+        print(f"Error generating VAPID keys: {e}")
+        return None, None
+
+if __name__ == "__main__":
+    generate_vapid_keys()