Python抓包并解析json爬虫的完整实例代码

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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