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afefaea | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 | """Browser automation tool for web scraping."""
from typing import Any, Optional
from dataclasses import dataclass
from enum import Enum
from app.utils.logging import get_logger
logger = get_logger(__name__)
class BrowserType(Enum):
"""Supported browser types."""
CHROMIUM = "chromium"
FIREFOX = "firefox"
WEBKIT = "webkit"
@dataclass
class BrowserConfig:
"""Configuration for browser instance."""
browser_type: BrowserType = BrowserType.CHROMIUM
headless: bool = True
timeout: int = 30000 # milliseconds
viewport_width: int = 1920
viewport_height: int = 1080
user_agent: Optional[str] = None
proxy: Optional[str] = None
@dataclass
class NavigationResult:
"""Result of a navigation action."""
url: str
status: int
title: str
success: bool
error: Optional[str] = None
@dataclass
class ClickResult:
"""Result of a click action."""
selector: str
success: bool
error: Optional[str] = None
@dataclass
class ScreenshotResult:
"""Result of a screenshot action."""
data: bytes
format: str
width: int
height: int
success: bool
error: Optional[str] = None
class BrowserTool:
"""
Browser automation tool using Playwright/Selenium.
This is a stub implementation that defines the interface.
Actual browser automation requires installing playwright or selenium.
"""
def __init__(self, config: Optional[BrowserConfig] = None) -> None:
self.config = config or BrowserConfig()
self._browser: Any = None
self._context: Any = None
self._page: Any = None
self._initialized: bool = False
async def initialize(self) -> None:
"""
Initialize the browser instance.
Note: This is a stub. Real implementation requires playwright:
pip install playwright
playwright install
"""
logger.info(f"Initializing browser: {self.config.browser_type.value}")
# Stub: In real implementation, initialize playwright here
# from playwright.async_api import async_playwright
# self._playwright = await async_playwright().start()
# self._browser = await self._playwright.chromium.launch(headless=self.config.headless)
self._initialized = True
logger.info("Browser initialized (stub mode)")
async def shutdown(self) -> None:
"""Close the browser and cleanup resources."""
logger.info("Shutting down browser")
if self._page:
# await self._page.close()
self._page = None
if self._context:
# await self._context.close()
self._context = None
if self._browser:
# await self._browser.close()
self._browser = None
self._initialized = False
logger.info("Browser shutdown complete")
async def navigate(
self,
url: str,
wait_until: str = "domcontentloaded",
timeout: Optional[int] = None,
) -> NavigationResult:
"""
Navigate to a URL.
Args:
url: Target URL
wait_until: Navigation wait condition (load, domcontentloaded, networkidle)
timeout: Navigation timeout in milliseconds
Returns:
NavigationResult with status and details
"""
logger.info(f"Navigating to: {url}")
if not self._initialized:
return NavigationResult(
url=url,
status=0,
title="",
success=False,
error="Browser not initialized",
)
# Stub implementation
# Real implementation:
# response = await self._page.goto(url, wait_until=wait_until, timeout=timeout)
# return NavigationResult(
# url=self._page.url,
# status=response.status if response else 0,
# title=await self._page.title(),
# success=True,
# )
return NavigationResult(
url=url,
status=200,
title="Stub Page Title",
success=True,
error="Stub mode - no actual navigation",
)
async def click(
self,
selector: str,
timeout: Optional[int] = None,
force: bool = False,
) -> ClickResult:
"""
Click an element on the page.
Args:
selector: CSS or XPath selector
timeout: Click timeout in milliseconds
force: Force click even if element is obscured
Returns:
ClickResult indicating success or failure
"""
logger.info(f"Clicking element: {selector}")
if not self._initialized:
return ClickResult(
selector=selector,
success=False,
error="Browser not initialized",
)
# Stub implementation
# Real implementation:
# await self._page.click(selector, timeout=timeout, force=force)
return ClickResult(
selector=selector,
success=True,
error="Stub mode - no actual click",
)
async def fill(
self,
selector: str,
value: str,
timeout: Optional[int] = None,
) -> ClickResult:
"""
Fill a form field with text.
Args:
selector: CSS or XPath selector
value: Text to enter
timeout: Action timeout in milliseconds
Returns:
ClickResult indicating success or failure
"""
logger.info(f"Filling element: {selector} with value")
if not self._initialized:
return ClickResult(
selector=selector,
success=False,
error="Browser not initialized",
)
# Stub implementation
# Real implementation:
# await self._page.fill(selector, value, timeout=timeout)
return ClickResult(
selector=selector,
success=True,
error="Stub mode - no actual fill",
)
async def get_html(
self,
selector: Optional[str] = None,
) -> str:
"""
Get HTML content of the page or a specific element.
Args:
selector: Optional selector to get HTML of specific element
Returns:
HTML content as string
"""
logger.info(f"Getting HTML for: {selector or 'full page'}")
if not self._initialized:
return ""
# Stub implementation
# Real implementation:
# if selector:
# element = await self._page.query_selector(selector)
# return await element.inner_html() if element else ""
# return await self._page.content()
return "<html><body><h1>Stub HTML Content</h1></body></html>"
async def screenshot(
self,
selector: Optional[str] = None,
full_page: bool = False,
format: str = "png",
) -> ScreenshotResult:
"""
Take a screenshot of the page or element.
Args:
selector: Optional selector to screenshot specific element
full_page: Capture full scrollable page
format: Image format (png, jpeg)
Returns:
ScreenshotResult with image data
"""
logger.info(f"Taking screenshot: selector={selector}, full_page={full_page}")
if not self._initialized:
return ScreenshotResult(
data=b"",
format=format,
width=0,
height=0,
success=False,
error="Browser not initialized",
)
# Stub implementation
# Real implementation:
# if selector:
# element = await self._page.query_selector(selector)
# data = await element.screenshot(type=format) if element else b""
# else:
# data = await self._page.screenshot(full_page=full_page, type=format)
return ScreenshotResult(
data=b"stub_screenshot_data",
format=format,
width=self.config.viewport_width,
height=self.config.viewport_height,
success=True,
error="Stub mode - no actual screenshot",
)
async def evaluate(self, script: str) -> Any:
"""
Execute JavaScript in the page context.
Args:
script: JavaScript code to execute
Returns:
Result of the script execution
"""
logger.info(f"Evaluating script: {script[:50]}...")
if not self._initialized:
return None
# Stub implementation
# Real implementation:
# return await self._page.evaluate(script)
return None
async def wait_for_selector(
self,
selector: str,
timeout: Optional[int] = None,
state: str = "visible",
) -> bool:
"""
Wait for an element to appear on the page.
Args:
selector: CSS or XPath selector
timeout: Wait timeout in milliseconds
state: Element state to wait for (visible, hidden, attached, detached)
Returns:
True if element found, False otherwise
"""
logger.info(f"Waiting for selector: {selector}")
if not self._initialized:
return False
# Stub implementation
# Real implementation:
# try:
# await self._page.wait_for_selector(selector, timeout=timeout, state=state)
# return True
# except TimeoutError:
# return False
return True
def health_check(self) -> bool:
"""Check if the browser is healthy and responsive."""
return self._initialized
@property
def is_initialized(self) -> bool:
"""Check if the browser has been initialized."""
return self._initialized
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