Python GDPR 合规：掌握个人数据处理

            from flask import Flask, request, render_template

app = Flask(__name__)

@app.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        email = request.form['email']
        consent_newsletter = request.form.get('consent_newsletter') == 'on'

        if consent_newsletter:
            # Process newsletter subscription
            print(f"User {email} consented to newsletter.")
            # Store consent status in database with timestamp
        else:
            print(f"User {email} did not consent to newsletter.")

        # Store user data (email) only if lawful basis exists (e.g., for core service)
        return 'Registration successful!'
    return render_template('register.html')

if __name__ == '__main__':
    app.run(debug=True)

            

              
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            from sqlalchemy import create_engine, Column, Integer, String, Boolean
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base

# ... (Database setup as above) ...

Base = declarative_base()

class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True)
    email = Column(String, unique=True, nullable=False)
    full_name = Column(String)
    address = Column(String)
    consent_marketing = Column(Boolean, default=False)

# ... (Engine and session creation) ...

def get_user_for_order_processing(user_id):
    # Only retrieve necessary fields: email and address for shipping
    user = session.query(User).filter(User.id == user_id).with_entities(User.email, User.address).first()
    if user:
        return {'email': user.email, 'address': user.address}
    return None

def get_user_for_marketing_email(user_id):
    # Only retrieve email if marketing consent is given
    user = session.query(User).filter(User.id == user_id, User.consent_marketing == True).with_entities(User.email).first()
    if user:
        return user.email
    return None

            

              
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            @app.route('/profile/edit', methods=['GET', 'POST'])
def edit_profile():
    user_id = get_current_user_id() # Assume this function retrieves the logged-in user's ID
    user = session.query(User).filter(User.id == user_id).first()

    if request.method == 'POST':
        new_email = request.form['email']
        # Add validation for email format and uniqueness before updating
        if is_valid_email(new_email) and not session.query(User).filter(User.email == new_email, User.id != user_id).first():
            user.email = new_email
            session.commit()
            return 'Profile updated successfully!'
        else:
            return 'Invalid email or email already in use.'

    return render_template('edit_profile.html', user=user)

            

              
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def anonymize_old_user_data(days_since_last_activity):
    cutoff_date = datetime.datetime.now() - datetime.timedelta(days=days_since_last_activity)
    old_users = session.query(User).filter(User.last_activity < cutoff_date).all()

    for user in old_users:
        # Anonymize sensitive fields
        user.full_name = f"Anonymous_{user.id}"
        user.address = ""
        # Mark as anonymized or remove other PII
        user.email = f"anon_{user.id}@example.com"
        # Optionally, set a flag 'is_anonymized = True'
        session.commit()
        print(f"Anonymized data for user ID: {user.id}")

# Example usage: Anonymize data for users inactive for over 3 years (approx. 1095 days)
# anonymize_old_user_data(1095)

            

              
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            from cryptography.fernet import Fernet

# Generate a key (store this securely!)
key = Fernet.generate_key()
cipher_suite = Fernet(key)

def encrypt_data(data):
    if isinstance(data, str):
        data = data.encode('utf-8')
    encrypted_data = cipher_suite.encrypt(data)
    return encrypted_data

def decrypt_data(encrypted_data):
    decrypted_data = cipher_suite.decrypt(encrypted_data)
    return decrypted_data.decode('utf-8')

# Example: Encrypting a sensitive field before storing in DB
# sensitive_field = "This is highly sensitive information."
# encrypted_field = encrypt_data(sensitive_field)
# Store 'encrypted_field' in database

# When retrieving:
# decrypted_field = decrypt_data(encrypted_field)

            

              
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import logging

logging.basicConfig(filename='data_access.log', level=logging.INFO,
                    format='%(asctime)s - %(levelname)s - %(message)s')

def get_user_profile(user_id):
    # Log access to user profile data
    logging.info(f"User ID {user_id} accessed profile data.")
    try:
        user = session.query(User).filter(User.id == user_id).first()
        if user:
            # Log successful retrieval
            logging.info(f"Successfully retrieved profile for User ID {user_id}.")
            return user
        else:
            # Log not found
            logging.warning(f"Profile not found for User ID {user_id}.")
            return None
    except Exception as e:
        # Log errors
        logging.error(f"Error accessing profile for User ID {user_id}: {e}")
        return None

            

              
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            import json
import csv
from io import StringIO

@app.route('/data-export', methods=['GET'])
def data_export():
    user_id = get_current_user_id()
    user_data = get_all_user_data(user_id) # Function to fetch all relevant data for the user

    # Option 1: Export as JSON
    # json_data = json.dumps(user_data, indent=2)
    # return Response(json_data, mimetype='application/json', headers={'Content-Disposition': 'attachment;filename=user_data.json'})

    # Option 2: Export as CSV (more complex if data is nested)
    output = StringIO()
    writer = csv.writer(output)
    # Write header based on user_data keys
    if user_data: # Assuming user_data is a dict of dicts or list of dicts
        # This needs careful implementation depending on 'user_data' structure
        pass # Placeholder for CSV writing logic

    return Response(output.getvalue(), mimetype='text/csv', headers={'Content-Disposition': 'attachment;filename=user_data.csv'})

            

              
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