|
| 1 | +import time |
| 2 | +from abc import ABC, abstractmethod |
| 3 | +from tempfile import mkdtemp |
| 4 | + |
| 5 | +from selenium import webdriver |
| 6 | +from selenium.webdriver.chrome.options import Options |
| 7 | + |
| 8 | +from db.documents import BaseDocument |
| 9 | + |
| 10 | + |
| 11 | +class BaseCrawler(ABC): |
| 12 | + model: type[BaseDocument] |
| 13 | + |
| 14 | + @abstractmethod |
| 15 | + def extract(self, link: str, **kwargs) -> None: ... |
| 16 | + |
| 17 | + |
| 18 | +class BaseAbstractCrawler(BaseCrawler, ABC): |
| 19 | + def __init__(self, scroll_limit: int = 5) -> None: |
| 20 | + options = webdriver.ChromeOptions() |
| 21 | + options.binary_location = "/opt/chrome/chrome" |
| 22 | + options.add_argument("--no-sandbox") |
| 23 | + options.add_argument("--headless=new") |
| 24 | + options.add_argument("--single-process") |
| 25 | + options.add_argument("--disable-dev-shm-usage") |
| 26 | + options.add_argument("--disable-gpu") |
| 27 | + options.add_argument("--log-level=3") |
| 28 | + options.add_argument("--disable-popup-blocking") |
| 29 | + options.add_argument("--disable-notifications") |
| 30 | + options.add_argument("--disable-dev-tools") |
| 31 | + options.add_argument("--ignore-certificate-errors") |
| 32 | + options.add_argument("--no-zygote") |
| 33 | + options.add_argument(f"--user-data-dir={mkdtemp()}") |
| 34 | + options.add_argument(f"--data-path={mkdtemp()}") |
| 35 | + options.add_argument(f"--disk-cache-dir={mkdtemp()}") |
| 36 | + options.add_argument("--remote-debugging-port=9222") |
| 37 | + |
| 38 | + self.set_extra_driver_options(options) |
| 39 | + |
| 40 | + self.scroll_limit = scroll_limit |
| 41 | + self.driver = webdriver.Chrome( |
| 42 | + service=webdriver.ChromeService("/opt/chromedriver"), |
| 43 | + options=options, |
| 44 | + ) |
| 45 | + |
| 46 | + def set_extra_driver_options(self, options: Options) -> None: |
| 47 | + pass |
| 48 | + |
| 49 | + def login(self) -> None: |
| 50 | + pass |
| 51 | + |
| 52 | + def scroll_page(self) -> None: |
| 53 | + """Scroll through the LinkedIn page based on the scroll limit.""" |
| 54 | + current_scroll = 0 |
| 55 | + last_height = self.driver.execute_script("return document.body.scrollHeight") |
| 56 | + while True: |
| 57 | + self.driver.execute_script( |
| 58 | + "window.scrollTo(0, document.body.scrollHeight);" |
| 59 | + ) |
| 60 | + time.sleep(5) |
| 61 | + new_height = self.driver.execute_script("return document.body.scrollHeight") |
| 62 | + if new_height == last_height or ( |
| 63 | + self.scroll_limit and current_scroll >= self.scroll_limit |
| 64 | + ): |
| 65 | + break |
| 66 | + last_height = new_height |
| 67 | + current_scroll += 1 |
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