File size: 8,243 Bytes
2f95553 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 |
"""
Playwright browser helper for loading and interacting with quiz pages.
"""
import asyncio
import logging
from typing import Optional, Dict, Any, List
from playwright.async_api import async_playwright, Browser, Page, BrowserContext
import time
logger = logging.getLogger(__name__)
class BrowserHelper:
"""Helper class for managing Playwright browser sessions."""
def __init__(self):
self.browser: Optional[Browser] = None
self.context: Optional[BrowserContext] = None
self.page: Optional[Page] = None
self.playwright = None
async def start(self, headless: bool = True) -> None:
"""
Start Playwright browser.
Args:
headless: Run in headless mode
"""
try:
self.playwright = await async_playwright().start()
self.browser = await self.playwright.chromium.launch(
headless=headless,
args=[
'--no-sandbox',
'--disable-setuid-sandbox',
'--disable-dev-shm-usage',
'--disable-accelerated-2d-canvas',
'--disable-gpu'
]
)
self.context = await self.browser.new_context(
viewport={'width': 1920, 'height': 1080},
user_agent='Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36'
)
self.page = await self.context.new_page()
logger.info("Browser started successfully")
except Exception as e:
logger.error(f"Error starting browser: {e}")
raise
async def load_page(self, url: str, wait_time: int = 5, timeout: int = 30000) -> Dict[str, Any]:
"""
Load a page and extract all content.
Args:
url: URL to load
wait_time: Seconds to wait for page to load
timeout: Page load timeout in milliseconds
Returns:
Dictionary with page content
"""
if not self.page:
await self.start()
try:
logger.info(f"Loading page: {url}")
await self.page.goto(url, wait_until='networkidle', timeout=timeout)
# Wait for dynamic content
await asyncio.sleep(wait_time)
# Extract page content
content = {
'url': url,
'title': await self.page.title(),
'text': await self.page.inner_text('body'),
'html': await self.page.content(),
'screenshot': await self.page.screenshot(full_page=True),
}
# Try to extract all visible text elements
try:
content['all_text'] = await self.page.evaluate("""
() => {
const walker = document.createTreeWalker(
document.body,
NodeFilter.SHOW_TEXT,
null,
false
);
let text = [];
let node;
while (node = walker.nextNode()) {
if (node.textContent.trim()) {
text.push(node.textContent.trim());
}
}
return text.join('\\n');
}
""")
except Exception as e:
logger.warning(f"Error extracting all text: {e}")
content['all_text'] = content['text']
# Extract links
try:
content['links'] = await self.page.evaluate("""
() => {
const links = Array.from(document.querySelectorAll('a[href]'));
return links.map(a => ({text: a.textContent.trim(), href: a.href}));
}
""")
except Exception as e:
logger.warning(f"Error extracting links: {e}")
content['links'] = []
# Extract images
try:
content['images'] = await self.page.evaluate("""
() => {
const images = Array.from(document.querySelectorAll('img[src]'));
return images.map(img => ({alt: img.alt, src: img.src}));
}
""")
except Exception as e:
logger.warning(f"Error extracting images: {e}")
content['images'] = []
logger.info(f"Page loaded successfully: {content['title']}")
return content
except Exception as e:
logger.error(f"Error loading page {url}: {e}")
raise
async def click_element(self, selector: str) -> bool:
"""
Click an element on the page.
Args:
selector: CSS selector
Returns:
True if successful
"""
try:
await self.page.click(selector)
await asyncio.sleep(1)
return True
except Exception as e:
logger.error(f"Error clicking element {selector}: {e}")
return False
async def fill_input(self, selector: str, value: str) -> bool:
"""
Fill an input field.
Args:
selector: CSS selector
value: Value to fill
Returns:
True if successful
"""
try:
await self.page.fill(selector, value)
return True
except Exception as e:
logger.error(f"Error filling input {selector}: {e}")
return False
async def wait_for_element(self, selector: str, timeout: int = 10000) -> bool:
"""
Wait for an element to appear.
Args:
selector: CSS selector
timeout: Timeout in milliseconds
Returns:
True if element found
"""
try:
await self.page.wait_for_selector(selector, timeout=timeout)
return True
except Exception as e:
logger.warning(f"Element {selector} not found: {e}")
return False
async def evaluate_script(self, script: str) -> Any:
"""
Execute JavaScript on the page.
Args:
script: JavaScript code to execute
Returns:
Result of script execution
"""
try:
return await self.page.evaluate(script)
except Exception as e:
logger.error(f"Error evaluating script: {e}")
return None
async def close(self) -> None:
"""Close browser and cleanup."""
try:
if self.page:
await self.page.close()
if self.context:
await self.context.close()
if self.browser:
await self.browser.close()
if self.playwright:
await self.playwright.stop()
logger.info("Browser closed")
except Exception as e:
logger.error(f"Error closing browser: {e}")
# Global browser instance
_browser: Optional[BrowserHelper] = None
async def get_browser() -> BrowserHelper:
"""
Get or create a browser instance.
Returns:
BrowserHelper instance
"""
global _browser
if _browser is None:
_browser = BrowserHelper()
await _browser.start()
return _browser
async def cleanup_browser() -> None:
"""Cleanup browser instance."""
global _browser
if _browser:
await _browser.close()
_browser = None
|