Python抓包并解析json爬虫的完整实例代码

时间：2020-12-02 python爬虫查看: 900

Python抓包并解析json爬虫

在使用Python爬虫的时候，通过抓包url，打开url可能会遇见以下类似网址，打开后会出现类似这样的界面，无法继续进行爬虫：

例如：

需要爬取网页中第二页的数据时，点击F12➡网络(Network)➡XHR，最好点击清除键，如下图：

通过点击“第二页”，会出现一个POST请求（有时会是GET请求），点击POST请求的url，（这里网址以POST请求为例），

如图：

然后复制参数代码

代码展示：

import requests
import json

url = 'https://m.ctrip.com/restapi/soa2/13444/json/getCommentCollapseList?_fxpcqlniredt=09031130211378497389'

header={
'authority': 'm.ctrip.com',
'method': 'POST',
'path': '/restapi/soa2/13444/json/getCommentCollapseList?_fxpcqlniredt=09031130211378497389',
'scheme': 'https',
'accept': '*/*',
'accept-encoding': 'gzip, deflate, br',
'accept-language': 'zh-CN,zh;q=0.9',
'cache-control': 'no-cache',
'content-length': '278',
'content-type': 'application/json',
'cookie': '__utma=1.1986366783.1601607319.1601607319.1601607319.1; __utmz=1.1601607319.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); _RSG=blqD1d4mGX0BA_amPD3t29; _RDG=286710759c35f221c000cbec6169743cac; _RGUID=0850c049-c137-4be5-90b7-0cd67093f28b; MKT_CKID=1601607321903.rzptk.lbzh; _ga=GA1.2.1986366783.1601607319; nfes_isSupportWebP=1; appFloatCnt=8; _gcl_dc=GCL.1601638857.CKzg58XqlewCFQITvAodioIJWw; Session=SmartLinkCode=U155952&SmartLinkKeyWord=&SmartLinkQuary=&SmartLinkHost=&SmartLinkLanguage=zh; Union=OUID=index&AllianceID=4897&SID=155952&SourceID=&createtime=1602506741&Expires=1603111540922; MKT_OrderClick=ASID=4897155952&AID=4897&CSID=155952&OUID=index&CT=1602506740926&CURL=https%3A%2F%2Fwww.ctrip.com%2F%3Fsid%3D155952%26allianceid%3D4897%26ouid%3Dindex&VAL={"pc_vid":"1601607319353.3cid9z"}; MKT_Pagesource=PC; _RF1=218.58.59.72; _bfa=1.1601607319353.3cid9z.1.1602506738089.1602680023977.4.25; _bfi=p1%3D290510%26p2%3D290510%26v1%3D25%26v2%3D24; MKT_CKID_LMT=1602680029515; __zpspc=9.5.1602680029.1602680029.1%232%7Cwww.baidu.com%7C%7C%7C%25E6%2590%25BA%25E7%25A8%258B%7C%23; _gid=GA1.2.1363667416.1602680030; _jzqco=%7C%7C%7C%7C1602680029668%7C1.672451398.1601607321899.1602506755440.1602680029526.1602506755440.1602680029526.undefined.0.0.16.16',
'cookieorigin': 'https://you.ctrip.com',
'origin': 'https://you.ctrip.com',
'pragma': 'no-cache',
'referer': 'https://you.ctrip.com/',
'sec-fetch-dest': 'empty',
'sec-fetch-mode': 'cors',
'sec-fetch-site': 'same-site',
'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36'
}

dat = {
 "arg": {
  'channelType': 2,
  'collapseType': 0,
  'commentTagId': 0,
  'pageIndex': 1,
  'pageSize': 10,
  'poiId': 75648,
  'sortType': 3,
  'sourceType': 1,
  'starType': 0
 },
 "head": {
  'auth': "",
  'cid': "09031117213661657011",
  'ctok': "",
  'cver': "1.0",
  'extension': [],
  'lang': "01",
  'sid': "8888",
  'syscode': "09",
  'xsid': ""
 }
}

r = requests.post(url, data=json.dumps(dat), headers=header)
s = r.json()
print(s)

运行结果：

然后右击结果，再点击Show as JSON：

最后就会出现目标url的响应信息，就可以进行爬取了！！！

总结

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