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Update core.py，以实现按照 START_DAY 至 END_DAY ，每一天进行筛选，这样能够突破 1000 条视频的限制，最大程度爬取该关键词下的所有视频
添加了`get_pubtime_datetime`函数用以获取`pubtime_begin_s`和`pubtime_end_s`参数，并为`search`函数添加了`ALL_DAY`选项，若`ALL_DAY`未开启，则保留原先的搜索策略，但每个关键词最多返回 1000 条数据，若`ALL_DAY`已开启，则使用新策略，按照 START_DAY 至 END_DAY 按照每一天进行筛选，这样能够突破 1000 条视频的限制，最大程度爬取该关键词下的所有视频，新添加的`get_pubtime_datetime`函数仅在`search`中使用，需要用户按安装`datetime`和`pandas`模块。已测试完毕
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翟持江
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@ -19,9 +19,10 @@ 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, Union
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from datetime import datetime, timedelta
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import pandas as pd
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from playwright.async_api import (BrowserContext, BrowserType, Page,
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async_playwright)
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from playwright.async_api import (BrowserContext, BrowserType, Page, async_playwright)
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import config
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from base.base_crawler import AbstractCrawler
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@ -95,26 +96,54 @@ class BilibiliCrawler(AbstractCrawler):
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utils.logger.info(
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"[BilibiliCrawler.start] Bilibili Crawler finished ...")
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async def get_pubtime_datetime(self, start: str = config.START_DAY, end: str = config.END_DAY) -> tuple[str, str]:
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"""
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获取 bilibili 作品发布日期起始时间戳 pubtime_begin_s 与发布日期结束时间戳 pubtime_end_s
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---
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:param start: 发布日期起始时间，YYYY-MM-DD
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:param end: 发布日期结束时间，YYYY-MM-DD
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Note
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---
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- 搜索的时间范围为 start 至 end，包含 start 和 end
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- 若要搜索同一天的内容，为了包含 start 当天的搜索内容，则 pubtime_end_s 的值应该为 pubtime_begin_s 的值加上一天再减去一秒，即 start 当天的最后一秒
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- 如仅搜索 2024-01-05 的内容，pubtime_begin_s = 1704384000，pubtime_end_s = 1704470399
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转换为可读的 datetime 对象：pubtime_begin_s = datetime.datetime(2024, 1, 5, 0, 0)，pubtime_end_s = datetime.datetime(2024, 1, 5, 23, 59, 59)
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- 若要搜索 start 至 end 的内容，为了包含 end 当天的搜索内容，则 pubtime_end_s 的值应该为 pubtime_end_s 的值加上一天再减去一秒，即 end 当天的最后一秒
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- 如搜索 2024-01-05 - 2024-01-06 的内容，pubtime_begin_s = 1704384000，pubtime_end_s = 1704556799
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转换为可读的 datetime 对象：pubtime_begin_s = datetime.datetime(2024, 1, 5, 0, 0)，pubtime_end_s = datetime.datetime(2024, 1, 6, 23, 59, 59)
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"""
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# 转换 start 与 end 为 datetime 对象
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start_day: datetime = datetime.strptime(start, '%Y-%m-%d')
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end_day: datetime = datetime.strptime(end, '%Y-%m-%d')
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if start_day > end_day:
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raise ValueError('Wrong time range, please check your start and end argument, to ensure that the start cannot exceed end')
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elif start_day == end_day: # 搜索同一天的内容
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end_day = start_day + timedelta(days=1) - timedelta(seconds=1) # 则将 end_day 设置为 start_day + 1 day - 1 second
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else: # 搜索 start 至 end
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end_day = end_day + timedelta(days=1) - timedelta(seconds=1) # 则将 end_day 设置为 end_day + 1 day - 1 second
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# 将其重新转换为时间戳
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return str(int(start_day.timestamp())), str(int(end_day.timestamp()))
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async def search(self):
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"""
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search bilibili video with keywords
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:return:
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"""
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utils.logger.info(
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"[BilibiliCrawler.search] Begin search bilibli keywords")
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utils.logger.info("[BilibiliCrawler.search] Begin search bilibli keywords")
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bili_limit_count = 20 # bilibili limit page fixed value
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if config.CRAWLER_MAX_NOTES_COUNT < bili_limit_count:
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config.CRAWLER_MAX_NOTES_COUNT = bili_limit_count
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start_page = config.START_PAGE # start page number
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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(
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f"[BilibiliCrawler.search] Current search keyword: {keyword}")
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utils.logger.info(f"[BilibiliCrawler.search] Current search keyword: {keyword}")
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# 每个关键词最多返回 1000 条数据
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if not config.ALL_DAY:
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page = 1
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while (page - start_page + 1) * bili_limit_count <= config.CRAWLER_MAX_NOTES_COUNT:
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if page < start_page:
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utils.logger.info(
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f"[BilibiliCrawler.search] Skip page: {page}")
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utils.logger.info(f"[BilibiliCrawler.search] Skip page: {page}")
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page += 1
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continue
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@ -131,11 +160,7 @@ class BilibiliCrawler(AbstractCrawler):
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video_list: List[Dict] = videos_res.get("result")
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semaphore = asyncio.Semaphore(config.MAX_CONCURRENCY_NUM)
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task_list = [
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self.get_video_info_task(aid=video_item.get(
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"aid"), bvid="", semaphore=semaphore)
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for video_item in video_list
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]
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task_list = [self.get_video_info_task(aid=video_item.get("aid"), bvid="", semaphore=semaphore) for video_item in video_list]
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video_items = await asyncio.gather(*task_list)
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for video_item in video_items:
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if video_item:
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@ -145,6 +170,48 @@ class BilibiliCrawler(AbstractCrawler):
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await self.get_bilibili_video(video_item, semaphore)
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page += 1
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await self.batch_get_video_comments(video_id_list)
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# 按照 START_DAY 至 END_DAY 按照每一天进行筛选，这样能够突破 1000 条视频的限制，最大程度爬取该关键词下的所有视频
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else:
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for day in pd.date_range(start=config.START_DAY, end=config.END_DAY, freq='D'):
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# 按照每一天进行爬取的时间戳参数
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pubtime_begin_s, pubtime_end_s = await self.get_pubtime_datetime(start=day.strftime('%Y-%m-%d'), end=day.strftime('%Y-%m-%d'))
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page = 1
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while (page - start_page + 1) * bili_limit_count <= config.CRAWLER_MAX_NOTES_COUNT:
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# ! Catch any error if response return nothing, go to next day
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try:
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# ! Don't skip any page, to make sure gather all video in one day
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# if page < start_page:
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# utils.logger.info(f"[BilibiliCrawler.search] Skip page: {page}")
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# page += 1
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# continue
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utils.logger.info(f"[BilibiliCrawler.search] search bilibili keyword: {keyword}, date: {day.ctime()}, page: {page}")
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video_id_list: List[str] = []
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videos_res = await self.bili_client.search_video_by_keyword(
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keyword=keyword,
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page=page,
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page_size=bili_limit_count,
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order=SearchOrderType.DEFAULT,
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pubtime_begin_s=pubtime_begin_s, # 作品发布日期起始时间戳
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pubtime_end_s=pubtime_end_s # 作品发布日期结束日期时间戳
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)
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video_list: List[Dict] = videos_res.get("result")
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semaphore = asyncio.Semaphore(config.MAX_CONCURRENCY_NUM)
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task_list = [self.get_video_info_task(aid=video_item.get("aid"), bvid="", semaphore=semaphore) for video_item in video_list]
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video_items = await asyncio.gather(*task_list)
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for video_item in video_items:
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if video_item:
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video_id_list.append(video_item.get("View").get("aid"))
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await bilibili_store.update_bilibili_video(video_item)
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await bilibili_store.update_up_info(video_item)
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await self.get_bilibili_video(video_item, semaphore)
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page += 1
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await self.batch_get_video_comments(video_id_list)
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# go to next day
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except Exception as e:
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print(e)
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break
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async def batch_get_video_comments(self, video_id_list: List[str]):
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"""
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