crawler_monitor/main/common.py

# -*- coding: utf-8 -*-
# @Author: wangkun
# @Time: 2022/6/27

"""
公共方法，包含：生成log / 删除log / 获取session  / 下载方法 / 读取文件 / 统计下载数
"""
import json
from datetime import date, timedelta
import datetime
import os
import time
import requests
import urllib3
from loguru import logger

proxies = {"http": None, "https": None}


class Common:
    # 统一获取当前时间 <class 'datetime.datetime'>  2022-04-14 20:13:51.244472
    now = datetime.datetime.now()
    # 昨天 <class 'str'>  2022-04-13
    yesterday = (date.today() + timedelta(days=-1)).strftime("%Y-%m-%d")
    # 今天 <class 'datetime.date'>  2022-04-14
    today = date.today()
    # 明天 <class 'str'>  2022-04-15
    tomorrow = (date.today() + timedelta(days=1)).strftime("%Y-%m-%d")

    # 使用 logger 模块生成日志
    @staticmethod
    def logger(log_type):
        """
        使用 logger 模块生成日志
        """
        # 日志路径
        log_dir = "./crawler_monitor/logs/"
        log_path = os.getcwd() + os.sep + log_dir
        if not os.path.isdir(log_path):
            os.makedirs(log_path)

        # 日志文件名
        if log_type == "kanyikan":
            log_name = time.strftime("%Y-%m-%d", time.localtime(time.time())) + '-monitor-kanyikan.log'
        elif log_type == "xiaoniangao":
            log_name = time.strftime("%Y-%m-%d", time.localtime(time.time())) + '-monitor-xiaoniangao.log'
        else:
            log_name = time.strftime("%Y-%m-%d", time.localtime(time.time())) + '.log'

        # 日志不打印到控制台
        logger.remove(handler_id=None)

        # rotation="500 MB"，实现每 500MB 存储一个文件
        # rotation="12:00"，实现每天 12:00 创建一个文件
        # rotation="1 week"，每周创建一个文件
        # retention="10 days"，每隔10天之后就会清理旧的日志
        # 初始化日志
        logger.add(log_dir + log_name, level="INFO", rotation='00:00')

        return logger

    @classmethod
    def del_logs(cls, log_type):
        """
        清除冗余日志文件
        :return: 保留最近 6 个日志
        """
        log_dir = "./crawler_monitor/logs/"
        all_files = sorted(os.listdir(log_dir))
        all_logs = []
        for log in all_files:
            name = os.path.splitext(log)[-1]
            if name == ".log":
                all_logs.append(log)

        if len(all_logs) <= 6:
            pass
        else:
            for file in all_logs[:len(all_logs) - 7]:
                os.remove(log_dir + file)
        cls.logger(log_type).info("清除冗余日志成功")

    # 删除 charles 缓存文件，只保留最近的两个文件
    @classmethod
    def del_charles_files(cls):
        # 目标文件夹下所有文件
        all_file = sorted(os.listdir("./crawler-kanyikan-recommend/chlsfiles/"))
        for file in all_file[0:-2]:
            os.remove("./crawler-kanyikan-recommend/chlsfiles/" + file)
        cls.logger("kanyikan").info("删除 charles 缓存文件成功")

    @classmethod
    def download_method(cls, log_type, text, d_name, d_url):
        """
        下载封面：text == "cover" ； 下载视频：text == "video"
        需要下载的视频标题：d_title
        视频封面，或视频播放地址：d_url
        下载保存路径："./videos/{d_title}/"
        """
        # 首先创建一个保存该视频相关信息的文件夹
        video_dir = "./videos/" + d_name + "/"
        if not os.path.exists(video_dir):
            os.mkdir(video_dir)

        # 下载视频
        if text == "video":
            # 需要下载的视频地址
            video_url = d_url
            # 视频名
            video_name = "video.mp4"

            # 下载视频
            urllib3.disable_warnings()
            response = requests.get(video_url, stream=True, proxies=proxies, verify=False)
            try:
                with open(video_dir + video_name, "wb") as f:
                    for chunk in response.iter_content(chunk_size=10240):
                        f.write(chunk)
                cls.logger(log_type).info("==========视频下载完成==========")
            except Exception as e:
                cls.logger(log_type).exception("视频下载失败：{}", e)

        # 下载封面
        elif text == "cover":
            # 需要下载的封面地址
            cover_url = d_url
            # 封面名
            cover_name = "image.jpg"

            # 下载封面
            urllib3.disable_warnings()
            response = requests.get(cover_url, proxies=proxies, verify=False)
            try:
                with open(video_dir + cover_name, "wb") as f:
                    f.write(response.content)
                cls.logger(log_type).info("==========封面下载完成==========")
            except Exception as e:
                cls.logger(log_type).exception("封面下载失败：{}", e)

    @classmethod
    def get_session(cls):
        # charles 抓包文件保存目录
        charles_file_dir = "./crawler-kanyikan-recommend/chlsfiles/"

        if int(len(os.listdir(charles_file_dir))) == 1:
            Common.logger("kanyikan").info("未找到chlsfile文件，等待60s")
            time.sleep(60)
        else:
            try:
                # 目标文件夹下所有文件
                all_file = sorted(os.listdir(charles_file_dir))

                # 获取到目标文件
                old_file = all_file[-3]

                # 分离文件名与扩展名
                new_file = os.path.splitext(old_file)

                # 重命名文件后缀
                os.rename(os.path.join(charles_file_dir, old_file),
                          os.path.join(charles_file_dir, new_file[0] + ".txt"))

                with open(charles_file_dir + new_file[0] + ".txt", encoding='utf-8-sig', errors='ignore') as f:
                    contents = json.load(f, strict=False)
                if "search.weixin.qq.com" in [text['host'] for text in contents]:
                    for text in contents:
                        if text["host"] == "search.weixin.qq.com" \
                                and text["path"] == "/cgi-bin/recwxa/recwxagetunreadmessagecnt":
                            sessions = text["query"].split("session=")[-1].split("&wxaVersion=")[0]
                            if "&vid" in sessions:
                                session = sessions.split("&vid")[0]
                                return session
                            elif "&offset" in sessions:
                                session = sessions.split("&offset")[0]
                                return session
                            elif "&wxaVersion" in sessions:
                                session = sessions.split("&wxaVersion")[0]
                                return session
                            elif "&limit" in sessions:
                                session = sessions.split("&limit")[0]
                                return session
                            elif "&scene" in sessions:
                                session = sessions.split("&scene")[0]
                                return session
                            elif "&count" in sessions:
                                session = sessions.split("&count")[0]
                                return session
                            elif "&channelid" in sessions:
                                session = sessions.split("&channelid")[0]
                                return session
                            elif "&subscene" in sessions:
                                session = sessions.split("&subscene")[0]
                                return session
                            elif "&clientVersion" in sessions:
                                session = sessions.split("&clientVersion")[0]
                                return session
                            elif "&sharesearchid" in sessions:
                                session = sessions.split("&sharesearchid")[0]
                                return session
                            elif "&nettype" in sessions:
                                session = sessions.split("&nettype")[0]
                                return session
                            elif "&switchprofile" in sessions:
                                session = sessions.split("&switchprofile")[0]
                                return session
                            elif "&switchnewuser" in sessions:
                                session = sessions.split("&switchnewuser")[0]
                                return session
                            else:
                                return sessions
                else:
                    cls.logger("kanyikan").info("未找到 session，10s后重新获取")
                    time.sleep(10)
                    cls.get_session()
            except Exception as e:
                cls.logger("kanyikan").exception("获取 session 异常，30s后重试：{}", e)
                time.sleep(30)
                cls.get_session()


if __name__ == "__main__":
    common = Common()