爬取站点 https://it.ithome.com/ityejie/ ,进入详情页提取内容。
1 import requests 2 import json 3 from lxml import etree 4 from pymongo import MongoClient 5 6 url = ‘https://it.ithome.com/ithome/getajaxdata.aspx‘ 7 headers = { 8 ‘authority‘: ‘it.ithome.com‘, 9 ‘method‘: ‘POST‘, 10 ‘path‘: ‘/ithome/getajaxdata.aspx‘, 11 ‘scheme‘: ‘https‘, 12 ‘accept‘: ‘text/html, */*; q=0.01‘, 13 ‘accept-encoding‘: ‘gzip, deflate, br‘, 14 ‘accept-language‘: ‘zh-CN,zh;q=0.9‘, 15 ‘content-length‘: ‘40‘, 16 ‘content-type‘: ‘application/x-www-form-urlencoded; charset=UTF-8‘, 17 ‘cookie‘: ‘BAIDU_SSP_lcr=https://www.hao123.com/link/https/?key=http%3A%2F%2Fwww.ithome.com%2F&&monkey=m-kuzhan-group1&c=B329C2F33C91DEACCFAEB1680305F198; Hm_lvt_f2d5cbe611513efcf95b7f62b934c619=1530106766; ASP.NET_SessionId=tyxenfioljanx4xwsvz3s4t4; Hm_lvt_cfebe79b2c367c4b89b285f412bf9867=1530106547,1530115669; BEC=228f7aa5e3abfee5d059195ad34b4137|1530117889|1530109082; Hm_lpvt_f2d5cbe611513efcf95b7f62b934c619=1530273209; Hm_lpvt_cfebe79b2c367c4b89b285f412bf9867=1530273261‘, 18 ‘origin‘: ‘https://it.ithome.com‘, 19 ‘referer‘: ‘https://it.ithome.com/ityejie/‘, 20 ‘user-agent‘: ‘Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3472.3 Safari/537.36‘, 21 ‘x-requested-with‘: ‘XMLHttpRequest‘ 22 } 23 24 client = MongoClient() 25 db = client[‘ithome‘] 26 collection = db[‘ithome‘] 27 max_page = 1000 28 29 def get_page(page): 30 31 formData = { 32 ‘categoryid‘: ‘31‘, 33 ‘type‘: ‘pccategorypage‘, 34 ‘page‘: page, 35 } 36 try: 37 r = requests.post(url, data=formData, headers=headers) 38 if r.status_code == 200: 39 40 #print(type(r)) 41 html = r.text 42 # 响应返回的是字符串,解析为HTML DOM模式 text = etree.HTML(html) 43 text = etree.HTML(html) 44 link_list = text.xpath(‘//h2/a/@href‘) 45 46 print("提取第"+str(page)+"页文章") 47 id=0 48 for link in link_list: 49 id+=1 50 print("解析第"+str(page)+"页第"+str(id)+"篇文章") 51 print("链接为:"+link) 52 loadpage(link) 53 54 except requests.ConnectionError as e: 55 print(‘Error‘, e.args) 56 57 58 # 取出每个文章的链接 59 def loadpage(link): 60 61 headers = {‘user-agent‘: ‘Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3472.3 Safari/537.36‘} 62 63 try: 64 65 reseponse = requests.get(link, headers = headers) 66 if reseponse.status_code == 200: 67 html = reseponse.text 68 # 解析 69 node = etree.HTML(html) 70 71 ithome ={} 72 # 取出每个标题,正文等 73 74 # xpath返回的列表,这个列表就这一个参数,用索引方式取出来,标题 75 ithome[‘title‘] = node.xpath(‘//*[@id="wrapper"]/div[1]/div[2]/h1‘)[0].text 76 # 时间 77 ithome[‘data‘] = node.xpath(‘//*[@id="pubtime_baidu"]‘)[0].text 78 # 取出标签下的内容 79 #content = node.xpath(‘//*[@id="paragraph"]/p/text()‘) 80 ithome[‘content‘] = "".join(node.xpath(‘//*[@id="paragraph"]/p/text()‘)).strip() 81 #content = node.xpath(‘//*[@id="paragraph"]/p‘)[1].text 82 # 取出标签里包含的内容,作者 83 ithome[‘author‘] = node.xpath(‘//*[@id="author_baidu"]/strong‘)[0].text 84 # 评论数 85 ithome[‘commentcount‘] = node.xpath(‘//span[@id="commentcount"]‘)[0].text 86 #评论数没有取到 87 write_to_file(ithome) 88 save_to_mongo(ithome) 89 90 except requests.ConnectionError as e: 91 print(‘Error‘, e.args) 92 93 def write_to_file(content): 94 with open(‘ithome.json‘,‘a‘,encoding=‘utf-8‘) as f: 95 f.write(json.dumps(content,ensure_ascii=False)+‘\n‘) 96 f.close() 97 98 def save_to_mongo(result): 99 if collection.insert(result): 100 print(‘Saved to Mongo‘) 101 102 if __name__ == ‘__main__‘: 103 for page in range(1, max_page + 1): 104 get_page(page) 105 106
原文地址:https://www.cnblogs.com/wanglinjie/p/9246369.html
时间: 2024-10-08 10:01:55