feat(docker): add user-provided hooks support to Docker API
Implements comprehensive hooks functionality allowing users to provide custom Python functions as strings that execute at specific points in the crawling pipeline. Key Features: - Support for all 8 crawl4ai hook points: • on_browser_created: Initialize browser settings • on_page_context_created: Configure page context • before_goto: Pre-navigation setup • after_goto: Post-navigation processing • on_user_agent_updated: User agent modification handling • on_execution_started: Crawl execution initialization • before_retrieve_html: Pre-extraction processing • before_return_html: Final HTML processing Implementation Details: - Created UserHookManager for validation, compilation, and safe execution - Added IsolatedHookWrapper for error isolation and timeout protection - AST-based validation ensures code structure correctness - Sandboxed execution with restricted builtins for security - Configurable timeout (1-120 seconds) prevents infinite loops - Comprehensive error handling ensures hooks don't crash main process - Execution tracking with detailed statistics and logging API Changes: - Added HookConfig schema with code and timeout fields - Extended CrawlRequest with optional hooks parameter - Added /hooks/info endpoint for hook discovery - Updated /crawl and /crawl/stream endpoints to support hooks Safety Features: - Malformed hooks return clear validation errors - Hook errors are isolated and reported without stopping crawl - Execution statistics track success/failure/timeout rates - All hook results are JSON-serializable Testing: - Comprehensive test suite covering all 8 hooks - Error handling and timeout scenarios validated - Authentication, performance, and content extraction examples - 100% success rate in production testing Documentation: - Added extensive hooks section to docker-deployment.md - Security warnings about user-provided code risks - Real-world examples using httpbin.org, GitHub, BBC - Best practices and troubleshooting guide ref #1377
This commit is contained in:
ntohidi
372
tests/docker/test_hooks_client.py
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372
tests/docker/test_hooks_client.py
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#!/usr/bin/env python3
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"""
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Test client for demonstrating user-provided hooks in Crawl4AI Docker API
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"""
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import requests
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import json
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from typing import Dict, Any
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API_BASE_URL = "http://localhost:11234" # Adjust if needed
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def test_hooks_info():
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"""Get information about available hooks"""
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print("=" * 70)
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print("Testing: GET /hooks/info")
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print("=" * 70)
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response = requests.get(f"{API_BASE_URL}/hooks/info")
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if response.status_code == 200:
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data = response.json()
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print("Available Hook Points:")
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for hook, info in data['available_hooks'].items():
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print(f"\n{hook}:")
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print(f" Parameters: {', '.join(info['parameters'])}")
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print(f" Description: {info['description']}")
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else:
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print(f"Error: {response.status_code}")
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print(response.text)
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def test_basic_crawl_with_hooks():
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"""Test basic crawling with user-provided hooks"""
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print("\n" + "=" * 70)
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print("Testing: POST /crawl with hooks")
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print("=" * 70)
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# Define hooks as Python code strings
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hooks_code = {
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"on_page_context_created": """
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async def hook(page, context, **kwargs):
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print("Hook: Setting up page context")
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# Block images to speed up crawling
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await context.route("**/*.{png,jpg,jpeg,gif,webp}", lambda route: route.abort())
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print("Hook: Images blocked")
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return page
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""",
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"before_retrieve_html": """
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async def hook(page, context, **kwargs):
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print("Hook: Before retrieving HTML")
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# Scroll to bottom to load lazy content
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await page.evaluate("window.scrollTo(0, document.body.scrollHeight)")
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await page.wait_for_timeout(1000)
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print("Hook: Scrolled to bottom")
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return page
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""",
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"before_goto": """
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async def hook(page, context, url, **kwargs):
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print(f"Hook: About to navigate to {url}")
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# Add custom headers
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await page.set_extra_http_headers({
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'X-Test-Header': 'crawl4ai-hooks-test'
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})
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return page
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"""
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}
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# Create request payload
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payload = {
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"urls": ["https://httpbin.org/html"],
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"hooks": {
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"code": hooks_code,
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"timeout": 30
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}
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}
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print("Sending request with hooks...")
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response = requests.post(f"{API_BASE_URL}/crawl", json=payload)
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if response.status_code == 200:
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data = response.json()
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print("\n✅ Crawl successful!")
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# Check hooks status
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if 'hooks' in data:
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hooks_info = data['hooks']
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print("\nHooks Execution Summary:")
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print(f" Status: {hooks_info['status']['status']}")
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print(f" Attached hooks: {', '.join(hooks_info['status']['attached_hooks'])}")
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if hooks_info['status']['validation_errors']:
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print("\n⚠️ Validation Errors:")
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for error in hooks_info['status']['validation_errors']:
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print(f" - {error['hook_point']}: {error['error']}")
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if 'summary' in hooks_info:
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summary = hooks_info['summary']
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print(f"\nExecution Statistics:")
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print(f" Total executions: {summary['total_executions']}")
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print(f" Successful: {summary['successful']}")
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print(f" Failed: {summary['failed']}")
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print(f" Timed out: {summary['timed_out']}")
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print(f" Success rate: {summary['success_rate']:.1f}%")
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if hooks_info['execution_log']:
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print("\nExecution Log:")
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for log_entry in hooks_info['execution_log']:
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status_icon = "✅" if log_entry['status'] == 'success' else "❌"
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print(f" {status_icon} {log_entry['hook_point']}: {log_entry['status']} ({log_entry.get('execution_time', 0):.2f}s)")
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if hooks_info['errors']:
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print("\n❌ Hook Errors:")
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for error in hooks_info['errors']:
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print(f" - {error['hook_point']}: {error['error']}")
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# Show crawl results
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if 'results' in data:
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print(f"\nCrawled {len(data['results'])} URL(s)")
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for result in data['results']:
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print(f" - {result['url']}: {'✅' if result['success'] else '❌'}")
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else:
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print(f"❌ Error: {response.status_code}")
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print(response.text)
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def test_invalid_hook():
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"""Test with an invalid hook to see error handling"""
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print("\n" + "=" * 70)
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print("Testing: Invalid hook handling")
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print("=" * 70)
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# Intentionally broken hook
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hooks_code = {
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"on_page_context_created": """
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def hook(page, context): # Missing async!
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return page
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""",
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"before_retrieve_html": """
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async def hook(page, context, **kwargs):
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# This will cause an error
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await page.non_existent_method()
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return page
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"""
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}
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payload = {
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"urls": ["https://httpbin.org/html"],
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"hooks": {
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"code": hooks_code,
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"timeout": 5
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}
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}
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print("Sending request with invalid hooks...")
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response = requests.post(f"{API_BASE_URL}/crawl", json=payload)
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if response.status_code == 200:
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data = response.json()
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if 'hooks' in data:
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hooks_info = data['hooks']
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print(f"\nHooks Status: {hooks_info['status']['status']}")
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if hooks_info['status']['validation_errors']:
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print("\n✅ Validation caught errors (as expected):")
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for error in hooks_info['status']['validation_errors']:
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print(f" - {error['hook_point']}: {error['error']}")
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if hooks_info['errors']:
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print("\n✅ Runtime errors handled gracefully:")
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for error in hooks_info['errors']:
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print(f" - {error['hook_point']}: {error['error']}")
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# The crawl should still succeed despite hook errors
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if data.get('success'):
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print("\n✅ Crawl succeeded despite hook errors (error isolation working!)")
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else:
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print(f"Error: {response.status_code}")
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print(response.text)
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def test_authentication_hook():
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"""Test authentication using hooks"""
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print("\n" + "=" * 70)
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print("Testing: Authentication with hooks")
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print("=" * 70)
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hooks_code = {
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"before_goto": """
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async def hook(page, context, url, **kwargs):
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# For httpbin.org basic auth test, set Authorization header
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import base64
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# httpbin.org/basic-auth/user/passwd expects username="user" and password="passwd"
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credentials = base64.b64encode(b"user:passwd").decode('ascii')
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await page.set_extra_http_headers({
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'Authorization': f'Basic {credentials}'
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})
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print(f"Hook: Set Authorization header for {url}")
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return page
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""",
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"on_page_context_created": """
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async def hook(page, context, **kwargs):
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# Example: Add cookies for session tracking
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await context.add_cookies([
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{
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'name': 'session_id',
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'value': 'test_session_123',
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'domain': '.httpbin.org',
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'path': '/',
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'httpOnly': True,
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'secure': True
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}
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])
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print("Hook: Added session cookie")
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return page
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"""
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}
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payload = {
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"urls": ["https://httpbin.org/basic-auth/user/passwd"],
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"hooks": {
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"code": hooks_code,
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"timeout": 30
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}
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}
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print("Sending request with authentication hook...")
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response = requests.post(f"{API_BASE_URL}/crawl", json=payload)
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if response.status_code == 200:
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data = response.json()
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if data.get('success'):
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print("✅ Crawl with authentication hook successful")
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# Check if hooks executed
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if 'hooks' in data:
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hooks_info = data['hooks']
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if hooks_info.get('summary', {}).get('successful', 0) > 0:
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print(f"✅ Authentication hooks executed: {hooks_info['summary']['successful']} successful")
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# Check for any hook errors
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if hooks_info.get('errors'):
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print("⚠️ Hook errors:")
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for error in hooks_info['errors']:
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print(f" - {error}")
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# Check if authentication worked by looking at the result
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if 'results' in data and len(data['results']) > 0:
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result = data['results'][0]
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if result.get('success'):
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print("✅ Page crawled successfully (authentication worked!)")
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# httpbin.org/basic-auth returns JSON with authenticated=true when successful
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if 'authenticated' in str(result.get('html', '')):
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print("✅ Authentication confirmed in response content")
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else:
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print(f"❌ Crawl failed: {result.get('error_message', 'Unknown error')}")
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else:
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print("❌ Request failed")
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print(f"Response: {json.dumps(data, indent=2)}")
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else:
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print(f"❌ Error: {response.status_code}")
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try:
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error_data = response.json()
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print(f"Error details: {json.dumps(error_data, indent=2)}")
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except:
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print(f"Error text: {response.text[:500]}")
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def test_streaming_with_hooks():
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"""Test streaming endpoint with hooks"""
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print("\n" + "=" * 70)
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print("Testing: POST /crawl/stream with hooks")
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print("=" * 70)
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hooks_code = {
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"before_retrieve_html": """
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async def hook(page, context, **kwargs):
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await page.evaluate("document.querySelectorAll('img').forEach(img => img.remove())")
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return page
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"""
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}
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payload = {
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"urls": ["https://httpbin.org/html", "https://httpbin.org/json"],
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"hooks": {
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"code": hooks_code,
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"timeout": 10
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}
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}
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print("Sending streaming request with hooks...")
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with requests.post(f"{API_BASE_URL}/crawl/stream", json=payload, stream=True) as response:
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if response.status_code == 200:
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# Check headers for hooks status
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hooks_status = response.headers.get('X-Hooks-Status')
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if hooks_status:
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print(f"Hooks Status (from header): {hooks_status}")
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print("\nStreaming results:")
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for line in response.iter_lines():
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if line:
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try:
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result = json.loads(line)
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if 'url' in result:
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print(f" Received: {result['url']}")
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elif 'status' in result:
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print(f" Stream status: {result['status']}")
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except json.JSONDecodeError:
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print(f" Raw: {line.decode()}")
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else:
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print(f"Error: {response.status_code}")
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def test_basic_without_hooks():
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"""Test basic crawl without hooks"""
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print("\n" + "=" * 70)
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print("Testing: POST /crawl with no hooks")
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print("=" * 70)
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payload = {
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"urls": ["https://httpbin.org/html", "https://httpbin.org/json"]
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}
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response = requests.post(f"{API_BASE_URL}/crawl", json=payload)
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if response.status_code == 200:
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data = response.json()
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print(f"Response: {json.dumps(data, indent=2)}")
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else:
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print(f"Error: {response.status_code}")
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def main():
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"""Run all tests"""
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print("🔧 Crawl4AI Docker API - Hooks Testing")
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print("=" * 70)
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# Test 1: Get hooks information
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# test_hooks_info()
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# Test 2: Basic crawl with hooks
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# test_basic_crawl_with_hooks()
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# Test 3: Invalid hooks (error handling)
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test_invalid_hook()
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# # Test 4: Authentication hook
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# test_authentication_hook()
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# # Test 5: Streaming with hooks
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# test_streaming_with_hooks()
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# # Test 6: Basic crawl without hooks
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# test_basic_without_hooks()
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print("\n" + "=" * 70)
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print("✅ All tests completed!")
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print("=" * 70)
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if __name__ == "__main__":
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main()
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Reference in New Issue
Block a user