Cloudflare Human Verification Bypass with nstbrowser

            # Example: Advanced Cloudflare bypass with nstbrowser
            import asyncio
            from playwright.async_api import async_playwright
            import random
            
            class CloudflareBypass:
                def __init__(self, nstbrowser_endpoint, proxy_config):
                    self.endpoint = nstbrowser_endpoint
                    self.proxy_config = proxy_config
                    self.session_data = {}
                
                async def create_stealth_session(self):
                    """Create a stealth browser session with anti-detection features"""
                    playwright = await async_playwright().start()
                    
                    # Connect to nstbrowser with stealth configuration
                    browser = await playwright.chromium.connect_over_cdp(
                        f"{self.endpoint}?stealth=true&proxy={self.proxy_config['id']}"
                    )
                    
                    # Create context with realistic settings
                    context = await browser.new_context(
                        viewport={'width': 1920, 'height': 1080},
                        user_agent='Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
                        locale='en-US',
                        timezone_id='America/New_York'
                    )
                    
                    return browser, context
                
                async def warm_up_session(self, page):
                    """Warm up the session with realistic browsing behavior"""
                    warm_up_sites = [
                        'https://www.google.com',
                        'https://www.wikipedia.org',
                        'https://www.github.com'
                    ]
                    
                    for site in warm_up_sites:
                        await page.goto(site, wait_until='networkidle')
                        await self.simulate_human_behavior(page)
                        await asyncio.sleep(random.uniform(2, 5))
                
                async def simulate_human_behavior(self, page):
                    """Simulate realistic human interaction patterns"""
                    # Random mouse movements
                    for _ in range(random.randint(2, 5)):
                        x = random.randint(100, 1800)
                        y = random.randint(100, 900)
                        await page.mouse.move(x, y)
                        await asyncio.sleep(random.uniform(0.1, 0.3))
                    
                    # Random scrolling
                    scroll_distance = random.randint(200, 800)
                    await page.mouse.wheel(0, scroll_distance)
                    await asyncio.sleep(random.uniform(1, 3))
                
                async def bypass_cloudflare(self, target_url, max_retries=3):
                    """Main bypass function with retry logic"""
                    browser, context = await self.create_stealth_session()
                    
                    try:
                        page = await context.new_page()
                        
                        # Warm up session
                        await self.warm_up_session(page)
                        
                        # Attempt to access target with retries
                        for attempt in range(max_retries):
                            try:
                                await page.goto(target_url, wait_until='networkidle', timeout=30000)
                                
                                # Check for Cloudflare challenge
                                if await self.detect_cloudflare_challenge(page):
                                    await self.handle_challenge(page)
                                    await asyncio.sleep(random.uniform(3, 7))
                                
                                # Verify successful access
                                if await self.verify_access(page):
                                    return await page.content()
                                
                            except Exception as e:
                                print(f"Attempt {attempt + 1} failed: {e}")
                                if attempt < max_retries - 1:
                                    await asyncio.sleep(random.uniform(5, 10))
                        
                        raise Exception("All bypass attempts failed")
                        
                    finally:
                        await browser.close()
                
                async def detect_cloudflare_challenge(self, page):
                    """Detect various types of Cloudflare challenges"""
                    challenge_selectors = [
                        '[data-ray]',  # Cloudflare challenge page
                        '.cf-browser-verification',
                        '#challenge-form',
                        '.turnstile-wrapper'
                    ]
                    
                    for selector in challenge_selectors:
                        if await page.query_selector(selector):
                            return True
                    return False
                
                async def handle_challenge(self, page):
                    """Handle Cloudflare challenges automatically"""
                    # Wait for challenge to complete
                    try:
                        await page.wait_for_selector('body:not(.no-js)', timeout=30000)
                        await page.wait_for_load_state('networkidle')
                    except:
                        # If automatic solving fails, implement fallback strategies
                        await self.manual_challenge_handling(page)
                
                async def verify_access(self, page):
                    """Verify that we successfully bypassed protection"""
                    # Check for common indicators of successful access
                    title = await page.title()
                    return not any(indicator in title.lower() for indicator in [
                        'just a moment', 'checking your browser', 'cloudflare'
                    ])
            
            # Usage example
            async def main():
                bypass = CloudflareBypass(
                    nstbrowser_endpoint="wss://your-endpoint.com/browser",
                    proxy_config={"id": "residential_proxy_pool_1"}
                )
                
                content = await bypass.bypass_cloudflare("https://protected-site.com")
                print(f"Successfully retrieved {len(content)} characters")
            
            # Run the bypass
            asyncio.run(main())