爬携程机票信息，缺出现空返回

想爬携程的机票信息，在浏览器中找到了返回的json文件，但执行时却返回空的参数

是不是有反爬的机制？还是其他的原因？

浏览器：

代码：

 def main():

    city = ['CKG']
    for i in city:
        host = 'http://flights.ctrip.com/domesticsearch/search/SearchFirstRouteFlights?'
        url = host + 'DCity1=BJS&ACity1={}&SearchType=S&DDate1={}&IsNearAirportRecommond=0'.format(i, current_date)
        r = requests.get(url).text
        data = json.loads(r)
        print(data)

返回的字典：

 {'lps': {}, 'lpsd': {}, 'fis': [], 'islpc': True, 'tf': None, 'sf': None, 'tsf': None, 'ist': False, 'rflag': {'rn': False, 'rt': False, 'rht': False, 'rtp': False, 'fquery': True}, 'hrrt': None, 'lp': 0, 'lcfp': 0, 'lr': 0, 'rpl': None, 'icfnf': False, 'al': [], 'iaw': False, 'atc': 0, 'abc': 0, 'hmat': False, 'hmab': False, 'hmfb': False, 'pc': 0, 'latp': 0, 'latdt': '0001-01-01 00:00:00', 'gpl': None, 'rlp': None, 'rrc': 0, 'rtgt': None, 'nnrr': 0, 'nragg': 0, 'airfreq': None, 'pis': None, 'TransitAddProducts1': None, 'TransitAddProducts2': None, 'train': None, 'bthd': None, 'recd': None, 'mrecd': None, 'mp': None, 'apb': {}, 'als': {}, 'fcts': [], 'ibc': {}, 'TraceLog': None, 'Error': {'Code': 1004, 'Message': '', 'Data': ''}}

import requests
import json

def main():
    headers = {
        "Host": "flights.ctrip.com",
        "User-Agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0",
        "Referer": "http://flights.ctrip.com/booking/SHA-BJS-day-1.html?DDate1=2017-10-22",
        "Connection": "keep-alive",
    }
    session = requests.Session()
    session.get('https://flights.ctrip.com',headers=headers)
    city = ['CKG']

    current_date = '20180303'
    for i in city:
        host = 'https://flights.ctrip.com/domesticsearch/search/SearchFirstRouteFlights?'
        url = host + 'DCity1=BJS&ACity1={}&SearchType=S&DDate1={}&IsNearAirportRecommond=0'.format(i, current_date)
        r = session.get(url,headers=headers).text
        data = json.loads(r)
        print(data)

main()

你用这段代码试试

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