python批量实现百度网盘链接有效性检测

（一）初始数据样式

将百度网盘连接存放到采用逗号间隔的UTF-8类型csv 文件中，数据存放格式为资源名 | 链接 | 密码，如下图所示：

逗号间隔的UTF-8类型csv 文件可以采用Excel转换而得，选择另存为操作即可：

（二）检测

2.1 原理与思路

如链接失效，会出现如下界面：

通过控制台查看返回的代码：

如果链接无效会有标签 class = share-error-left , div_id = share_nofound_des。故可以通过 urllib 库和 bs4.BeautifulSoup 请求并解析HTML，从而判断该标签是否存在。

2.2 设计

通过读取 csv 文件，依次将资源链接传入处理函数，依次判断并保存到新的 resultLink.csv中，作为输出结果。

2.3 代码 Demo

2.3.1 判断与解析代码

# -*- coding: utf-8 -*-
"""
comment: 百度网盘爬虫分析

@author: GanAH  2020/5/12.
@version 1.0.
@contact: https://www.ganahe.top/
"""
import csv
import os
import urllib.request
import time

from bs4 import BeautifulSoup


class BaiduNetdisk(object):

    def __init__(self):
        pass

    def disabledLink(self, link):
        """
        链接有效性判断
        :param link: baiduNetdisk download Link
        :return: 0-False / html-True
        """
        try:
            print("url", link)

            headers = {
                'User-Agent': 'Mozilla/4.0(compatible;MSIE 5.5;Windows NT)'
            }

            req = urllib.request.Request(url=link, headers=headers, method='POST')
            response = urllib.request.urlopen(req, None, 8)  # 在这里应该加入代理
            html = response.read()
            return {"code": 1, "status": html}
        except Exception as e:
            return {"code": 0, "status": e.__str__()}

    def anylies(self, link):
        resultDict = self.disabledLink(link)
        if resultDict["code"] == 0:
            print("异常错误！")
            print(resultDict.get("status"))
        else:
            try:
                # print(resultDict.get("status").decode('utf-8'))
                # ak = str(resultDict.get("status"),encoding = "utf8")
                # print(type(resultDict.get("status")))
                # for i in range(len(ak)):
                #     print(ak[i])
                soup = BeautifulSoup(resultDict.get("status"), 'html.parser')  # 文档对象

                # 类名为xxx而且文本内容为hahaha的div
                count = 0
                # 查找是否有share-error标签，有则无效
                print("查找是否有share-error标签，有则无效")
                for k in soup.find_all('div', class_='share-error-left'):  # ,string='更多'
                    print(k)
                    count += 1
                if count == 0:
                    print("链接有效")
                    return True
                else:
                    print("链接无效")
                    return False

            except Exception as e:
                print("异常错误-302：", e.__str__())

2.3.2 逻辑处理代码

if __name__ == "__main__":

    try:
        print("【===百度网盘链接有效性自动判别程序===】\n")
        print(" * 联系方式\n   1.https://www.ganahe.top/ \n   2.合作微信公众号：星辰换日\n")
        # 读取CSV文档
        filePath = input(" 请输入文件路径(示例:E:\\百度\\Link.csv)：")
        sourceList = []
        with open(filePath, "r", encoding="utf8") as F:
            for line in F:
                # print(line)
                sourceList.append(line.split(","))

        with open(os.path.dirname(filePath) + "resultLink.csv", "w",newline= "", encoding="utf8") as S:
            writer = csv.writer(S)
            head = sourceList[0]
            head.append("有效性")
            print(head)
            writer.writerow(head)
            for i in range(1, len(sourceList)):
                line = sourceList[i]
                link = line[1]
                print("\n ------- 第"+str(i)+"个链接情况：",sourceList[i])
                just = BaiduNetdisk().anylies(link)
                if just is True:
                    line.append("有效")
                else:
                    line.append("链接无效")
                writer.writerow(line)
        
        print("\n-- 结束，所有链接均已分析完成，请打开resultLink.csv查看")
        time.sleep(600)

    except Exception as e:
        print("异常错误-301：", e.__str__())