Python 爬虫实战—盘搜搜
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近期公司给了个任务：根据关键搜索百度网盘共享文件并下载。
琢磨了几天写下了一段简单的demo代码，后期优化没有处理。
主要的思路：（1）根据关键字爬取盘搜搜的相关信息
（2）解析并获取盘搜搜跳转到百度网盘的URL地址
（3）解析百度网盘获取真实下载URL然后下载文件
本来下了一段ip代理处理的， 可惜免费爬取的IP时效性差基本上用不了，所以下面给出的是没有ip代理demo
然而没有ip代理处理的话， 下载不到几个文件ip就被封了。所以下面的代码仅供学习。
# -*- coding=utf-8 -*- import random import time import requests import os import re import urllib import json import string import threading from lxml import etree from urllib import request, parse def get_UserAgent(): ‘‘‘ 返回一个随机的请求头 headers ‘‘‘ USER_AGENTS = [ "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; AcooBrowser; .NET CLR 1.1.4322; .NET CLR 2.0.50727)", "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; Acoo Browser; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506)", "Mozilla/4.0 (compatible; MSIE 7.0; AOL 9.5; AOLBuild 4337.35; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)", "Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US)", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)", "Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 1.0.3705; .NET CLR 1.1.4322)", "Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.0.04506.30)", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN) AppleWebKit/523.15 (KHTML, like Gecko, Safari/419.3) Arora/0.3 (Change: 287 c9dfb30)", "Mozilla/5.0 (X11; U; Linux; en-US) AppleWebKit/527+ (KHTML, like Gecko, Safari/419.3) Arora/0.6", "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070215 K-Ninja/2.1.1", "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9) Gecko/20080705 Firefox/3.0 Kapiko/3.0", "Mozilla/5.0 (X11; Linux i686; U;) Gecko/20070322 Kazehakase/0.4.5", "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.8) Gecko Fedora/1.9.0.8-1.fc10 Kazehakase/0.5.6", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/535.20 (KHTML, like Gecko) Chrome/19.0.1036.7 Safari/535.20", "Opera/9.80 (Macintosh; Intel Mac OS X 10.6.8; U; fr) Presto/2.9.168 Version/11.52", ] UserAgent = random.choice(USER_AGENTS) headers = {‘User-Agent‘: UserAgent} return headers def filterType(filename): ‘‘‘ 返回文件类型 ‘‘‘ filter_type = [‘.zip‘, ‘.pdf‘, ‘.doc‘, ‘.docx‘, ‘.xls‘, ‘.xlsx‘, ‘.png‘, ‘.img‘, ‘.rar‘, ‘.txt‘] IsExist = ‘‘ if filename != ‘‘: for item in filter_type: if filename.find(item) != -1: IsExist = item break return IsExist def save_file(downloadUrl, saveFilePath): ‘‘‘ 文件下载1 ‘‘‘ print(‘文件开始下载并保存...‘) try: header_dict = get_UserAgent() with requests.get(downloadUrl, headers=header_dict, timeout=6, stream=True) as web: print(web.status_code) # 为保险起见使用二进制写文件模式，防止编码错误 with open(saveFilePath, ‘wb‘) as outfile: for chunk in web.iter_content(chunk_size=1024): outfile.write(chunk) print(‘文件下载完成...‘) except Exception as ex: print(ex) def save_file_retrieve(downloadUrl, saveFileName): ‘‘‘‘‘ 文件下载2 ‘‘‘ local = os.path.join(‘D://downLoad//‘, saveFileName) request.urlretrieve(downloadUrl, local, Schedule) def Schedule(a, b, c): ‘‘‘‘‘ a:已经下载的数据块 b:数据块的大小 c:远程文件的大小 ‘‘‘ per = 100.0 * a * b / c if per > 100: per = 100 print(‘%.2f%%‘ % per) def get_file(downloadUrl, saveFilePath): ‘‘‘ 文件下载3 ‘‘‘ try: u = request.urlopen(downloadUrl) print(‘文件开始下载并保存...‘) block_sz = 8192 with open(saveFilePath, ‘wb‘) as f: while True: buffer = u.read(block_sz) if buffer: f.write(buffer) else: break print(‘文件下载完成...‘) except urllib.error.HTTPError: # 碰到了匹配但不存在的文件时，提示并返回 print(downloadUrl, "url file not found") except IOError: print(IOError.message) def getAll_contentForJs(html, re_str): ‘‘‘ 获取js里面yunData数据,返回yunData字符串 html: html代码 re_str: 正则表达式 ‘‘‘ #res_str = r‘yunData.setData\({(.*?)}\)‘ my_js = re.findall(re_str, html, re.S | re.M) jsData = my_js return jsData def getAll_contentFosXpath(html, myxpath): ‘‘‘ 获取页面上指定内容 html: html代码 myxpath: xpath语法 ‘‘‘ myHtml = etree.HTML(html) mydata = myHtml.xpath(myxpath) return mydata def get_postUrl(Jsparams): ‘‘‘ 拼接请求百度网盘真实下载地址post的url地址 ‘‘‘ urlstr = ‘https://pan.baidu.com/api/sharedownload?‘ params = json.loads(Jsparams) urlstr += ‘sign=‘ + str(params.get(‘sign‘)) + ‘‘ urlstr += ‘×tamp=‘ + str(params.get(‘timestamp‘)) + ‘‘ urlstr += ‘&bdstoken=‘ + str(params.get(‘bdstoken‘)) + ‘‘ urlstr += ‘&channel=chunlei‘ urlstr += ‘&clienttype=0‘ urlstr += ‘&web=1‘ urlstr += ‘&app_id=250528‘ return urlstr def get_postData(Jsparams): ‘‘‘ 拼接请求百度网盘真实下载地址post的请求参数 ‘‘‘ postdata = {} params = json.loads(Jsparams) postdata["encrypt"] = 0 postdata["product"] = "share" postdata["uk"] = str(params.get("uk")) postdata["primaryid"] = str(params.get("shareid")) postdata["fid_list"] = "[" + str(params[‘file_list‘][‘list‘][0].get(‘fs_id‘)) + "]" return postdata def get_downLoad(Jsparams): ‘‘‘ 发送post请求获取真实下载地址 ‘‘‘ print(‘发送post请求获取真实下载路径...‘) try: header_dict = get_UserAgent() params = parse.urlencode(get_postData( Jsparams)).encode(encoding=‘UTF8‘) req = request.Request(url=get_postUrl(Jsparams), data=params, headers=header_dict, method="POST") resp = request.urlopen(req) resp = resp.read().decode(encoding=‘utf-8‘) return resp except Exception as ex: print(ex) def get_html(urlLink, headers): ‘‘‘ 获取页面代码html, 同IP多次请求会出现超时现象。 ‘‘‘ try: response = requests.get( url=urlLink, headers=headers, timeout=60) response.encoding = response.apparent_encoding if response.status_code == 200: return response.text except urllib.request.URLError as e: print(‘URLError! The bad Msg is %s‘ % e) return None except urllib.request.HTTPError as e: print(‘HTTPError! The bad Msg is %s‘ % e) return None except Exception as e: print(‘Unknown Errors! The bad Msg is %s ‘ % e) return None def get_redirects(urlLink, headers): try: response = requests.get( url=urlLink, headers=headers, timeout=60, allow_redirects=False) return response.headers[‘Location‘] except urllib.request.URLError as e: print(‘URLError! The bad Msg is %s‘ % e) return None except urllib.request.HTTPError as e: print(‘HTTPError! The bad Msg is %s‘ % e) return None except Exception as e: print(‘Unknown Errors! The bad Msg is %s ‘ % e) return None def baiDuShare(bdUrl): try: print(‘解析盘搜搜详情页‘) header_dict = get_UserAgent() shareHtml = get_html(bdUrl, header_dict) if shareHtml != None: ‘‘‘ 解析网站数据获取百度网盘共享文件URL ‘‘‘ # 共享文件名称 share_file = getAll_contentFosXpath( shareHtml, ‘//*[@id="con"]/div/div[1]/h1‘) fileName = share_file[0].text # 共享文件大小 share_size = getAll_contentForJs( shareHtml, ‘<dd>文件大小：(.*?)MB</dd>‘) # 百度网盘共享地址 share_link = getAll_contentForJs( shareHtml, ‘a=go&url=(.*?)&t=‘) share_url = ‘http://to.pansoso.com/?a=to&url=‘ + share_link[0] panRedirects = get_redirects(share_url, header_dict) if panRedirects != None: # 获取文件对应类型 print(panRedirects) print(fileName) FirtHtml = get_html(panRedirects, header_dict) share_type = filterType(fileName) MyJS = getAll_contentForJs( FirtHtml, r‘yunData.setData\({(.*?)}\)‘) StrMyJS = ‘{‘ + MyJS[0] + ‘}‘ DownLink = json.loads(get_downLoad(StrMyJS)) print(DownLink[‘list‘][0].get(‘dlink‘)) save_file(DownLink[‘list‘][0].get(‘dlink‘), ‘D://downLoad//‘ + str(fileName).replace(share_type, ‘‘) + share_type) # 有些文件后缀不在标题的最后，所以将它替换为空再在最后加上文件后缀 else: print(‘百度共享盘解析失败‘) else: print(‘盘搜搜详情页失败‘) except Exception as e: print(‘Unknown Errors! The bad Msg is %s ‘ % e) return None if __name__ == ‘__main__‘: headers = get_UserAgent() # 定制请求头 targeturl = ‘http://www.pansoso.com‘ headers["Host"] = "www.pansoso.com" headers["Accept-Language"] = "zh-CN,zh;q=0.9" searchStr = input(‘请输入关键字：‘) searchUrl = ‘http://www.pansoso.com/zh/%s‘ % searchStr searchUrl = request.quote(searchUrl, safe=string.printable) print(‘开始搜索【%s】网盘共享: %s‘ % (searchStr, searchUrl)) try: time.sleep(random.random() * 10) panSosoHtml = get_html(searchUrl, headers) if panSosoHtml != None: panSosoTitle = getAll_contentFosXpath( panSosoHtml, ‘//div[@id="content"]/div[@class="pss"]/h2/a‘) baiduthreads = [] for titleItem in panSosoTitle: # 筛选出文件类型以及关键字匹配的 共享文件 if filterType(titleItem.text) != ‘‘ and str(titleItem.text).find(searchStr) != -1: print(targeturl + titleItem.attrib[‘href‘]) Urlparam = targeturl + titleItem.attrib[‘href‘] t = threading.Thread( target=baiDuShare, args=(Urlparam,)) baiduthreads.append(t) for s in baiduthreads: # 开启多线程爬取 s.start() time.sleep(random.random() * 10) for e in baiduthreads: # 等待所有线程结束 e.join() else: print(‘请求失败‘) except Exception as e: print(‘Unknown Errors! The bad Msg is %s ‘ % e)
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