243 lines
10 KiB
Python
243 lines
10 KiB
Python
# -*- coding: utf-8 -*-
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import asyncio
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import os
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import random
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from asyncio import Task
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from typing import Dict, List, Optional, Tuple
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from playwright.async_api import (BrowserContext, BrowserType, Page,
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async_playwright)
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import config
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from base.base_crawler import AbstractCrawler
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from model.m_zhihu import ZhihuContent
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from proxy.proxy_ip_pool import IpInfoModel, create_ip_pool
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from store import zhihu as zhihu_store
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from tools import utils
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from var import crawler_type_var, source_keyword_var
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from .client import ZhiHuClient
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from .exception import DataFetchError
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from .help import ZhiHuJsonExtractor
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from .login import ZhiHuLogin
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class ZhihuCrawler(AbstractCrawler):
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context_page: Page
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zhihu_client: ZhiHuClient
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browser_context: BrowserContext
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def __init__(self) -> None:
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self.index_url = "https://www.zhihu.com"
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# self.user_agent = utils.get_user_agent()
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self.user_agent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36"
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self._extractor = ZhiHuJsonExtractor()
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async def start(self) -> None:
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"""
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Start the crawler
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Returns:
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"""
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playwright_proxy_format, httpx_proxy_format = None, None
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if config.ENABLE_IP_PROXY:
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ip_proxy_pool = await create_ip_pool(config.IP_PROXY_POOL_COUNT, enable_validate_ip=True)
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ip_proxy_info: IpInfoModel = await ip_proxy_pool.get_proxy()
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playwright_proxy_format, httpx_proxy_format = self.format_proxy_info(ip_proxy_info)
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async with async_playwright() as playwright:
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# Launch a browser context.
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chromium = playwright.chromium
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self.browser_context = await self.launch_browser(
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chromium,
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None,
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self.user_agent,
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headless=config.HEADLESS
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)
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# stealth.min.js is a js script to prevent the website from detecting the crawler.
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await self.browser_context.add_init_script(path="libs/stealth.min.js")
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self.context_page = await self.browser_context.new_page()
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await self.context_page.goto(self.index_url, wait_until="domcontentloaded")
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# Create a client to interact with the zhihu website.
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self.zhihu_client = await self.create_zhihu_client(httpx_proxy_format)
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if not await self.zhihu_client.pong():
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login_obj = ZhiHuLogin(
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login_type=config.LOGIN_TYPE,
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login_phone="", # input your phone number
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browser_context=self.browser_context,
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context_page=self.context_page,
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cookie_str=config.COOKIES
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)
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await login_obj.begin()
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await self.zhihu_client.update_cookies(browser_context=self.browser_context)
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# 知乎的搜索接口需要打开搜索页面之后cookies才能访问API，单独的首页不行
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utils.logger.info("[ZhihuCrawler.start] Zhihu跳转到搜索页面获取搜索页面的Cookies，改过程需要5秒左右")
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await self.context_page.goto(f"{self.index_url}/search?q=python&search_source=Guess&utm_content=search_hot&type=content")
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await asyncio.sleep(5)
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await self.zhihu_client.update_cookies(browser_context=self.browser_context)
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crawler_type_var.set(config.CRAWLER_TYPE)
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if config.CRAWLER_TYPE == "search":
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# Search for notes and retrieve their comment information.
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await self.search()
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elif config.CRAWLER_TYPE == "detail":
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# Get the information and comments of the specified post
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raise NotImplementedError
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elif config.CRAWLER_TYPE == "creator":
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# Get creator's information and their notes and comments
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raise NotImplementedError
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else:
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pass
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utils.logger.info("[ZhihuCrawler.start] Zhihu Crawler finished ...")
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async def search(self) -> None:
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"""Search for notes and retrieve their comment information."""
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utils.logger.info("[ZhihuCrawler.search] Begin search zhihu keywords")
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zhihu_limit_count = 20 # zhihu limit page fixed value
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if config.CRAWLER_MAX_NOTES_COUNT < zhihu_limit_count:
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config.CRAWLER_MAX_NOTES_COUNT = zhihu_limit_count
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start_page = config.START_PAGE
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for keyword in config.KEYWORDS.split(","):
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source_keyword_var.set(keyword)
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utils.logger.info(f"[ZhihuCrawler.search] Current search keyword: {keyword}")
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page = 1
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while (page - start_page + 1) * zhihu_limit_count <= config.CRAWLER_MAX_NOTES_COUNT:
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if page < start_page:
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utils.logger.info(f"[ZhihuCrawler.search] Skip page {page}")
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page += 1
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continue
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try:
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utils.logger.info(f"[ZhihuCrawler.search] search zhihu keyword: {keyword}, page: {page}")
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content_list: List[ZhihuContent] = await self.zhihu_client.get_note_by_keyword(
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keyword=keyword,
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page=page,
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)
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utils.logger.info(f"[ZhihuCrawler.search] Search contents :{content_list}")
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if not content_list:
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utils.logger.info("No more content!")
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break
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page += 1
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for content in content_list:
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await zhihu_store.update_zhihu_content(content)
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await self.batch_get_content_comments(content_list)
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except DataFetchError:
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utils.logger.error("[ZhihuCrawler.search] Search content error")
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return
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async def batch_get_content_comments(self, content_list: List[ZhihuContent]):
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"""
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Batch get content comments
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Args:
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content_list:
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Returns:
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"""
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if not config.ENABLE_GET_COMMENTS:
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utils.logger.info(f"[ZhihuCrawler.batch_get_content_comments] Crawling comment mode is not enabled")
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return
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semaphore = asyncio.Semaphore(config.MAX_CONCURRENCY_NUM)
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task_list: List[Task] = []
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for content_item in content_list:
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task = asyncio.create_task(self.get_comments(content_item, semaphore), name=content_item.content_id)
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task_list.append(task)
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await asyncio.gather(*task_list)
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async def get_comments(self, content_item: ZhihuContent, semaphore: asyncio.Semaphore):
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"""
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Get note comments with keyword filtering and quantity limitation
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Args:
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content_item:
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semaphore:
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Returns:
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"""
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async with semaphore:
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utils.logger.info(f"[ZhihuCrawler.get_comments] Begin get note id comments {content_item.content_id}")
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await self.zhihu_client.get_note_all_comments(
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content=content_item,
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crawl_interval=random.random(),
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callback=zhihu_store.batch_update_zhihu_note_comments
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)
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@staticmethod
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def format_proxy_info(ip_proxy_info: IpInfoModel) -> Tuple[Optional[Dict], Optional[Dict]]:
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"""format proxy info for playwright and httpx"""
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playwright_proxy = {
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"server": f"{ip_proxy_info.protocol}{ip_proxy_info.ip}:{ip_proxy_info.port}",
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"username": ip_proxy_info.user,
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"password": ip_proxy_info.password,
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}
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httpx_proxy = {
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f"{ip_proxy_info.protocol}": f"http://{ip_proxy_info.user}:{ip_proxy_info.password}@{ip_proxy_info.ip}:{ip_proxy_info.port}"
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}
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return playwright_proxy, httpx_proxy
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async def create_zhihu_client(self, httpx_proxy: Optional[str]) -> ZhiHuClient:
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"""Create zhihu client"""
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utils.logger.info("[ZhihuCrawler.create_zhihu_client] Begin create zhihu API client ...")
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cookie_str, cookie_dict = utils.convert_cookies(await self.browser_context.cookies())
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zhihu_client_obj = ZhiHuClient(
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proxies=httpx_proxy,
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headers={
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'accept': '*/*',
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'accept-language': 'zh-CN,zh;q=0.9',
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'cookie': cookie_str,
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'priority': 'u=1, i',
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'referer': 'https://www.zhihu.com/search?q=python&time_interval=a_year&type=content',
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'user-agent': self.user_agent,
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'x-api-version': '3.0.91',
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'x-app-za': 'OS=Web',
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'x-requested-with': 'fetch',
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'x-zse-93': '101_3_3.0',
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},
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playwright_page=self.context_page,
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cookie_dict=cookie_dict,
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)
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return zhihu_client_obj
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async def launch_browser(
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self,
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chromium: BrowserType,
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playwright_proxy: Optional[Dict],
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user_agent: Optional[str],
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headless: bool = True
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) -> BrowserContext:
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"""Launch browser and create browser context"""
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utils.logger.info("[ZhihuCrawler.launch_browser] Begin create browser context ...")
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if config.SAVE_LOGIN_STATE:
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# feat issue #14
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# we will save login state to avoid login every time
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user_data_dir = os.path.join(os.getcwd(), "browser_data",
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config.USER_DATA_DIR % config.PLATFORM) # type: ignore
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browser_context = await chromium.launch_persistent_context(
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user_data_dir=user_data_dir,
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accept_downloads=True,
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headless=headless,
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proxy=playwright_proxy, # type: ignore
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viewport={"width": 1920, "height": 1080},
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user_agent=user_agent
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)
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return browser_context
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else:
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browser = await chromium.launch(headless=headless, proxy=playwright_proxy) # type: ignore
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browser_context = await browser.new_context(
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viewport={"width": 1920, "height": 1080},
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user_agent=user_agent
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)
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return browser_context
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async def close(self):
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"""Close browser context"""
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await self.browser_context.close()
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utils.logger.info("[ZhihuCrawler.close] Browser context closed ...")
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