前言
之前爬取美团，马蜂窝等网站的数据都挺顺利，大众点评（这个反爬机制有点麻烦）在磕磕绊绊中也算成功（重点是网页页数的变化和关键字的隐藏替换）但携程居然遇到了瓶颈。
主要是查看源代码时发现关键商户信息根本就找不到，就很奇怪。对于关键信息评论发现翻页时网页的url不变，网上查了一下说是使用是动态的网址进行建构的，Ajax页面加载，那么通用的request.get()就不能用了，所以采取模拟浏览器进行数据爬取。
为什么选取龟峰呢？因为正好才从龟峰回来，这几乎是去过的人最少的5A级景区，大胆猜测数据可能没有那么多（相比去的其他地方而言）而且去的时候惊喜的给免了门票，所以用这个来测试。
PS：如有需要Python学习资料的小伙伴可以加下方的群去找免费管理员领取
可以免费领取源码、项目实战视频、PDF文件等
第一步：打开网页
可能需要登录后才能查看评价
查看网页源代码
可以看到无法加载出关键评论信息
F12查看评论的具体代码，如下图找到评论列表，找到url和request payload
至此已经获取了网址最重要的内容
直接上完整代码
import requests
import json
import time
import csv
import re c=open(r'D:\guifeng.csv','a+',newline='',encoding='utf-8') fieldnames=['user','time','score','content'] writer=csv.DictWriter(c,fieldnames=fieldnames) writer.writeheader() head = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0'} postUrl = "https://sec-m.ctrip.com/restapi/soa2/12530/json/viewCommentList" data_1 = { "pageid": "290510", "viewid": "127481", "tagid": "-11", "pagenum": "1", "pagesize": "10", "contentType": "json", "SortType": "1", "head": { "appid": "100013776", "cid": "09031010311083118856", "ctok": "", "cver": "1.0", "lang": "01", "sid": "8888", "syscode": "09", "auth": "", "extension": [ { "name": "protocal", "value": "https" } ] }, "ver": "7.10.3.0319180000" } html = requests.post(postUrl, data=json.dumps(data_1)).text html = json.loads(html) jingqu = '龟峰' pages = html['data']['totalpage'] datas = [] for j in range(pages): data1 = { "pageid": "290510", "viewid": "127481", "tagid": "-11", "pagenum": str(j + 1), "pagesize": "10", "contentType": "json", "SortType": "1", "head": { "appid": "100013776", "cid": "09031010311083118856", "ctok": "", "cver": "1.0", "lang": "01", "sid": "8888", "syscode": "09", "auth": "", "extension": [ { "name": "protocal", "value": "https" } ] }, "ver": "7.10.3.0319180000" } datas.append(data1) for k in datas[:50]: print('正在抓取第' + k['pagenum'] + "页") time.sleep(3) html1 = requests.post(postUrl, data=json.dumps(k)).text html1 = json.loads(html1) comments = html1['data']['comments'] for i in comments: user = i['uid'] time1 = i['date'] score = i['score'] content = i['content'] content = re.sub(" ", "", content) content = re.sub(" ", "", content) writer.writerow({'user': user,'time':time1,'score': score,'content':content}) c.close()即
按F5直接运行得出文件（自动存储在D盘里）
右键以记事本打开（如果使用excel需要先另存为否则初次打开会是乱码）
关键步骤解读
postUrl = "https://sec-m.ctrip.com/restapi/soa2/12530/json/viewCommentList"这个网址是评论的通用网址不需要改动
可以改动的地方为：
c=open(r'D:\guifeng.csv','a+',newline='',encoding='utf-8')存储的路径可以自定义，这里我直接用的是D盘
data_1 = {
"pageid": "290510",
"viewid": "127481",
"tagid": "-11", "pagenum": "1", "pagesize": "10", "contentType": "json", "SortType": "1", "head": { "appid": "100013776", "cid": "09031010311083118856", "ctok": "", "cver": "1.0", "lang": "01", "sid": "8888", "syscode": "09", "auth": "", "extension": [ { "name": "protocal", "value": "https" } ] }, "ver": "7.10.3.0319180000" }具体数据就是如下图需爬取网页评论代码里红圈的部分
同样的这个也是
data1 = {
"pageid": "290510",
"viewid": "127481",
"tagid": "-11", "pagenum": str(j + 1), "pagesize": "10", "contentType": "json", "SortType": "1", "head": { "appid": "100013776", "cid": "09031010311083118856", "ctok": "", "cver": "1.0", "lang": "01", "sid": "8888", "syscode": "09", "auth": "", "extension": [ { "name": "protocal", "value": "https" } ] }, "ver": "7.10.3.0319180000" } datas.append(data1)注意：
"pagenum": str(j + 1),这一步不可更改
最后
for k in datas[:50]: print('正在抓取第' + k['pagenum'] + "页") time.sleep(3)这里的爬取的页数50是可以更改的
时间间隔3也是可以更改的
至此可以成功爬取携程上任意一家的评论，yes！！！
本文的文字及图片来源于网络,仅供学习、交流使用,不具有任何商业用途,版权归原作者所有,如有问题请及时联系我们以作处理。
作者：一千口水牛