import requests
url = 'http://xxx?startDate=2017-10-19&endDate=2017-10-19&pageIndex=1&limit=50&sort=datetime&order=desc'

headers={
 "Host":"xxx.com",
 "Connection": "keep-alive",
 "Accept": "application/json, text/javascript, */*; q=0.01",
 "User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.59 Safari/537.36",
 "X-Requested-With": "XMLHttpRequest",
 "Referer": "http://app.jg.eastmoney.com/html_Report/index.html",
 "Accept-Encoding": "gzip,deflate",
 "Accept-Language": "en-us,en",
 "Cookie":"xxx"
}
r = requests.get(url,headers)
print (r.text)

{"Id":"6202c187-2fad-46e8-b4c6-b72ac8de0142","ReturnMsg":"加载失败！"}

GET http://xxx?istartDate=2017-10-19&endDate=2017-10-19&pageIndex=1&limit=50&sort=datetime&order=desc
　　&Host=xxx.com
　　&Connection=keep-alive
　　&Accept=application%2Fjson%2C+text%2Fjavascript%2C+%2A%2F%2A%3B+q%3D0.01
　　&User-Agent=Mozilla%2F5.0+%28Windows+NT+6.1%3B+WOW64%29+AppleWebKit%2F537.36+%28KHTML%2C+like+Gecko%29+Chrome%2F29.0.1547.59+Safari%2F537.36
　　&X-Requested-With=XMLHttpRequest
　　&Referer=xxx
　　&Accept-Encoding=gzip%2Cdeflate
　　&Accept-Language=en-us%2Cen
　　&Cookie=xxx
HTTP/1.1


Host: xxx.com
User-Agent: python-requests/2.18.4
Accept-Encoding: gzip, deflate
Accept: */*
Connection: keep-alive


HTTP/1.1 200 OK
Server: nginx/1.2.2
Date: Sat, 21 Oct 2017 06:07:21 GMT
Content-Type: application/json; charset=utf-8
Content-Length: 75
Connection: keep-alive
Cache-Control: private
X-AspNetMvc-Version: 5.2
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET

import requests
url = 'http://xxx?startDate=2017-10-19&endDate=2017-10-19&pageIndex=1&limit=50&sort=datetime&order=desc'

headers={
 "Host":"xxx.com",
 "Connection": "keep-alive",
 "Accept": "application/json, text/javascript, */*; q=0.01",
 "User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.59 Safari/537.36",
 "X-Requested-With": "XMLHttpRequest",
 "Referer": "http://app.jg.eastmoney.com/html_Report/index.html",
 "Accept-Encoding": "gzip,deflate",
 "Accept-Language": "en-us,en",
 "Cookie":"xxx"
}
r = requests.get(url,headers=headers)

GET http://xxx?startDate=2017-10-19&endDate=2017-10-19&pageIndex=1&limit=50&sort=datetime&order=desc HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.59 Safari/537.36
Accept-Encoding: gzip,deflate
Accept: application/json, text/javascript, */*; q=0.01
Connection: keep-alive
Host: xxx.com
X-Requested-With: XMLHttpRequest
Referer: http://xxx
Accept-Language: en-us,en
Cookie: xxx


HTTP/1.1 200 OK
Server: nginx/1.2.2
Date: Sat, 21 Oct 2017 06:42:21 GMT
Content-Type: application/json; charset=utf-8
Content-Length: 75
Connection: keep-alive
Cache-Control: private
X-AspNetMvc-Version: 5.2
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET

{"Id":"6202c187-2fad-46e8-b4c6-b72ac8de0142","ReturnMsg":"加载失败！"}