293 lines
12 KiB
Python
293 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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# @Author : relakkes@gmail.com
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# @Time : 2023/12/23 15:41
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# @Desc : 微博爬虫主流程代码
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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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import config
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from base.base_crawler import AbstractCrawler
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from playwright.async_api import (BrowserContext, BrowserType, Page,
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async_playwright)
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from proxy.proxy_ip_pool import IpInfoModel, create_ip_pool
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from store import weibo as weibo_store
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from tools import utils
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from var import crawler_type_var
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from .client import WeiboClient
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from .exception import DataFetchError
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from .field import SearchType
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from .help import filter_search_result_card
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from .login import WeiboLogin
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class WeiboCrawler(AbstractCrawler):
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platform: str
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login_type: str
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crawler_type: str
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context_page: Page
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wb_client: WeiboClient
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browser_context: BrowserContext
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def __init__(self):
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self.index_url = "https://www.weibo.com"
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self.mobile_index_url = "https://m.weibo.cn"
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self.user_agent = utils.get_user_agent()
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self.mobile_user_agent = utils.get_mobile_user_agent()
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def init_config(self, platform: str, login_type: str, crawler_type: str, start_page: int, keyword: str):
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self.platform = platform
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self.login_type = login_type
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self.crawler_type = crawler_type
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self.start_page = start_page
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self.keyword = keyword
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async def start(self):
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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.mobile_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.mobile_index_url)
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# Create a client to interact with the xiaohongshu website.
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self.wb_client = await self.create_weibo_client(httpx_proxy_format)
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if not await self.wb_client.pong():
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login_obj = WeiboLogin(
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login_type=self.login_type,
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login_phone="", # 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 self.context_page.goto(self.index_url)
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await asyncio.sleep(1)
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await login_obj.begin()
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# 登录成功后重定向到手机端的网站，再更新手机端登录成功的cookie
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utils.logger.info("[WeiboCrawler.start] redirect weibo mobile homepage and update cookies on mobile platform")
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await self.context_page.goto(self.mobile_index_url)
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await asyncio.sleep(2)
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await self.wb_client.update_cookies(browser_context=self.browser_context)
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crawler_type_var.set(self.crawler_type)
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if self.crawler_type == "search":
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# Search for video and retrieve their comment information.
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await self.search()
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elif self.crawler_type == "detail":
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# Get the information and comments of the specified post
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await self.get_specified_notes()
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else:
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pass
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utils.logger.info("[WeiboCrawler.start] Weibo Crawler finished ...")
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async def search(self):
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"""
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search weibo note with keywords
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:return:
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"""
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utils.logger.info("[WeiboCrawler.search] Begin search weibo keywords")
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weibo_limit_count = 10 # weibo limit page fixed value
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if config.CRAWLER_MAX_NOTES_COUNT < weibo_limit_count:
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config.CRAWLER_MAX_NOTES_COUNT = weibo_limit_count
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start_page = self.start_page
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for keyword in self.keyword.split(","):
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utils.logger.info(f"[WeiboCrawler.search] Current search keyword: {keyword}")
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page = 1
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while (page - start_page + 1) * weibo_limit_count <= config.CRAWLER_MAX_NOTES_COUNT:
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if page < start_page:
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utils.logger.info(f"[WeiboCrawler.search] Skip page: {page}")
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page += 1
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continue
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search_res = await self.wb_client.get_note_by_keyword(
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keyword=keyword,
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page=page,
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search_type=SearchType.DEFAULT
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)
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note_id_list: List[str] = []
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note_list = filter_search_result_card(search_res.get("cards"))
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for note_item in note_list:
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if note_item:
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mblog: Dict = note_item.get("mblog")
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if mblog:
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note_id_list.append(mblog.get("id"))
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await weibo_store.update_weibo_note(note_item)
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await self.get_note_images(mblog)
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page += 1
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await self.batch_get_notes_comments(note_id_list)
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async def get_specified_notes(self):
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"""
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get specified notes info
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:return:
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"""
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semaphore = asyncio.Semaphore(config.MAX_CONCURRENCY_NUM)
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task_list = [
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self.get_note_info_task(note_id=note_id, semaphore=semaphore) for note_id in
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config.WEIBO_SPECIFIED_ID_LIST
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]
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video_details = await asyncio.gather(*task_list)
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for note_item in video_details:
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if note_item:
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await weibo_store.update_weibo_note(note_item)
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await self.batch_get_notes_comments(config.WEIBO_SPECIFIED_ID_LIST)
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async def get_note_info_task(self, note_id: str, semaphore: asyncio.Semaphore) -> Optional[Dict]:
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"""
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Get note detail task
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:param note_id:
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:param semaphore:
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:return:
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"""
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async with semaphore:
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try:
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result = await self.wb_client.get_note_info_by_id(note_id)
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return result
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except DataFetchError as ex:
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utils.logger.error(f"[WeiboCrawler.get_note_info_task] Get note detail error: {ex}")
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return None
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except KeyError as ex:
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utils.logger.error(
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f"[WeiboCrawler.get_note_info_task] have not fund note detail note_id:{note_id}, err: {ex}")
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return None
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async def batch_get_notes_comments(self, note_id_list: List[str]):
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"""
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batch get notes comments
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:param note_id_list:
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:return:
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"""
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if not config.ENABLE_GET_COMMENTS:
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utils.logger.info(f"[WeiboCrawler.batch_get_note_comments] Crawling comment mode is not enabled")
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return
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utils.logger.info(f"[WeiboCrawler.batch_get_notes_comments] note ids:{note_id_list}")
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semaphore = asyncio.Semaphore(config.MAX_CONCURRENCY_NUM)
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task_list: List[Task] = []
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for note_id in note_id_list:
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task = asyncio.create_task(self.get_note_comments(note_id, semaphore), name=note_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_note_comments(self, note_id: str, semaphore: asyncio.Semaphore):
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"""
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get comment for note id
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:param note_id:
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:param semaphore:
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:return:
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"""
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async with semaphore:
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try:
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utils.logger.info(f"[WeiboCrawler.get_note_comments] begin get note_id: {note_id} comments ...")
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await self.wb_client.get_note_all_comments(
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note_id=note_id,
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crawl_interval=random.randint(1,10), # 微博对API的限流比较严重，所以延时提高一些
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callback=weibo_store.batch_update_weibo_note_comments
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)
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except DataFetchError as ex:
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utils.logger.error(f"[WeiboCrawler.get_note_comments] get note_id: {note_id} comment error: {ex}")
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except Exception as e:
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utils.logger.error(f"[WeiboCrawler.get_note_comments] may be been blocked, err:{e}")
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async def get_note_images(self, mblog: Dict):
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"""
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get note images
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:param mblog:
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:return:
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"""
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if not config.ENABLE_GET_IMAGES:
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utils.logger.info(f"[WeiboCrawler.get_note_images] Crawling image mode is not enabled")
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return
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pics: Dict = mblog.get("pics")
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if not pics:
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return
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for pic in pics:
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url = pic.get("url")
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if not url:
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continue
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content = await self.wb_client.get_note_image(url)
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if content != None:
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extension_file_name = url.split(".")[-1]
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await weibo_store.update_weibo_note_image(pic["pid"], content, extension_file_name)
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async def create_weibo_client(self, httpx_proxy: Optional[str]) -> WeiboClient:
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"""Create xhs client"""
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utils.logger.info("[WeiboCrawler.create_weibo_client] Begin create weibo API client ...")
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cookie_str, cookie_dict = utils.convert_cookies(await self.browser_context.cookies())
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weibo_client_obj = WeiboClient(
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proxies=httpx_proxy,
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headers={
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"User-Agent": utils.get_mobile_user_agent(),
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"Cookie": cookie_str,
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"Origin": "https://m.weibo.cn",
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"Referer": "https://m.weibo.cn",
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"Content-Type": "application/json;charset=UTF-8"
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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 weibo_client_obj
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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 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("[WeiboCrawler.launch_browser] Begin create browser context ...")
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if config.SAVE_LOGIN_STATE:
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user_data_dir = os.path.join(os.getcwd(), "browser_data",
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config.USER_DATA_DIR % self.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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